S-8353/8354 Series www.sii-ic.com STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 (c) Seiko Instruments Inc., 2002-2010 The S-8353/8354 Series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8353 Series) and a PWM / PFM switching control circuit (S-8354 Series). The S-8353/8354 Series can configure the step-up switching regulator with an external coil, capacitor, and diode. In addition to the above features, the small package and low current consumption make the S-8353/8354 Series ideal for portable equipment applications requiring high efficiency. The S-8353 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM control circuit whose duty ratio can be varied linearly from 0% to 83% (from 0% to 78% for 250 kHz models), an excellently designed error amplifier, and phase compensation circuits. The S-8354 Series features a PWM / PFM switching controller that can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current. Features * Low voltage operation: Startup at 0.9 V min. (IOUT = 1 mA) guaranteed * Low current consumption : During operation 18.7 A (3.3 V, 50 kHz, typ.) During shutdown: 0.5 A (max.) * Duty ratio : Built-in PWM / PFM switching control circuit (S-8354 Series) 15 % to 83 % (30 kHz and 50 kHz models) 15 % to 78 % (250 kHz models) * External parts : Coil, capacitor, and diode * Output voltage : Selectable in 0.1 V steps between 1.5 V and 6.5 V (for VDD / VOUT separate types) Selectable in 0.1 V steps between 2.0 V and 6.5 V (for other than VDD / VOUT separate types) * Output voltage accuracy : 2.4% * Oscillation frequency : 30 kHz, 50 kHz, and 250 kHz selectable * Soft start function : 6 ms (50 kHz, typ.) * Lead-free, Sn 100%, halogen-free*1 *1. Refer to " Product Name Structure" for details. Applications * Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs * Power supplies for audio equipment such as portable CD / MD players * Constant voltage power supplies for cameras, VCRs, and communication devices * Power supplies for microcomputers Packages * SOT-23-3 * SOT-23-5 * SOT-89-3 Seiko Instruments Inc. 1 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Block Diagrams (1) A, C and H Types (Without Shutdown Function) CONT VOUT Oscillation circuit PWMcontrol circuit or PWM / PFM swiching control circuit Soft start built-in reference power supply IC internal power supply + - Phase compensation circuit VSS Figure 1 (2) A and H Types (With Shutdown Function) CONT VOUT Oscillation circuit PWMcontrol circuit or PWM / PFM swiching control circuit Soft start built-in reference power supply IC internal power supply + - Phase compensation circuit VSS ON / OFF Figure 2 (3) D and J Types (VDD / VOUT Separate Type) CONT VDD VOUT Oscillation circuit IC internal power supply + PWMcontrol circuit - or PWM / PFM swiching control circuit Soft start built-in reference power supply Phase compensation circuit Figure 3 2 Seiko Instruments Inc. VSS STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Product Name Structure The control system, product types, output voltage, and packages for the S-8353/8354 Series can be selected at the user's request. Please refer to the "3. Product Name" for the definition of the product name, "4. Package" regarding the package drawings and "5. Product Name List" for the full product names. 1. Function List (1) PWM Control Products Table 1 Switching Frequency [kHz] Shutdown Function VDD / VOUT Separate Type Package S-8353AxxMC S-8353AxxMA S-8353AxxUA S-8353CxxMA S-8353CxxUA 50 50 50 30 30 Yes - - - - - - - - - SOT-23-5 SOT-23-3 SOT-89-3 SOT-23-3 SOT-89-3 S-8353DxxMC 50 - Yes SOT-23-5 S-8353HxxMC 250 Yes - SOT-23-5 S-8353HxxMA 250 - - SOT-23-3 S-8353HxxUA 250 - - SOT-89-3 S-8353JxxMC 250 - Yes SOT-23-5 Product Name Application Applications requiring shutdown function Applications not requiring shutdown function Applications not requiring shutdown function For pager For pager Applications requiring variable output voltage with an external resistor Applications requiring a shutdown function and a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications requiring variable output voltage with an external resistor and a thin coil (2) PWM / PFM Switching Control Products Table 2 Shutdown Function VDD / VOUT Separate Type Package Yes - - - - - - - SOT-23-5 SOT-23-3 SOT-89-3 SOT-23-3 S-8354AxxMC S-8354AxxMA S-8354AxxUA S-8354CxxMA Switching Frequency [kHz] 50 50 50 30 S-8354DxxMC 50 - Yes SOT-23-5 S-8354HxxMC 250 Yes - SOT-23-5 S-8354HxxMA 250 - - SOT-23-3 S-8354HxxUA 250 - - SOT-89-3 S-8354JxxMC 250 - Yes SOT-23-5 Product Name Seiko Instruments Inc. Application Applications requiring shutdown function Applications not requiring shutdown function Applications not requiring shutdown function For pager Applications requiring variable output voltage with an external resistor Applications requiring a shutdown function and a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications requiring variable output voltage with an external resistor and a thin coil 3 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 2. Package and Function List by Product Type Table 3 Series Name Package Name Shutdown Function VDD / VOUT Separate Type (Abbreviation) Yes / No Yes / No Type A (Normal product or with shutdown function) A = 50 kHz C (Normal product) C = 30 kHz D (VDD / VOUT separate type) D = 50 kHz H (Normal product or with shutdown function) H = 250 kHz J (VDD / VOUT separate type) J = 250 kHz S-8353 Series, S-8354 Series MC MA / UA Yes No No MA No No MC No Yes MC Yes MA / UA No MC No No Yes 3. Product Name (1) SOT-23-3 S-835 x x xx MA - xxx xx x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) *1 IC direction in tape specifications T1 : Product of environmental code = U T2 : Product of environmental code = G Product code *2 Package code MA : SOT-23-3 Output voltage 15 to 65 (e.g. When the output voltage is 1.5 V, it is expressed as 15.) Product type A : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), C : Normal products, D : VDD / VOUT separate type, H : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), J : VDD / VOUT separate type, Control system 3 : PWM control 4 : PWM / PFM switching control *1. Refer to the tape specifications. *2. Refer to the Table 4 to Table 8 in the "5. Product Name List". 4 Seiko Instruments Inc. fOSC = 50 kHz fOSC = 30 kHz fOSC = 50 kHz fOSC = 250 kHz fOSC = 250 kHz STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series (2) SOT-23-5, SOT-89-3 S-835 x x xx xx - xxx T2 x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) IC direction in tape specifications *1 Product code *2 Package code MC : SOT-23-5 UA : SOT-89-3 Output voltage 15 to 65 (e.g. When the output voltage is 1.5 V, it is expressed as 15.) Product type A : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), C : Normal products, D : VDD / VOUT separate type, H : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), J : VDD / VOUT separate type, fOSC = 50 kHz fOSC = 30 kHz fOSC = 50 kHz fOSC = 250 kHz fOSC = 250 kHz Control system 3 : PWM control 4 : PWM / PFM switching control *1. Refer to the tape specifications. *2. Refer to the Table 4 to Table 8 in the "5. Product Name List". 4. Package Package Name SOT-23-3 SOT-23-5 SOT-89-3 Environmental code = G Environmental code = U Package Drawing Code Tape Reel MP003-A-P-SD MP003-C-P-SD MP005-A-P-SD UP003-A-P-SD MP003-A-C-SD MP003-C-C-SD MP005-A-C-SD UP003-A-C-SD MP003-A-R-SD MP003-Z-R-SD MP005-A-R-SD UP003-A-R-SD Seiko Instruments Inc. 5 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 5. Product Name List (1) S-8353 Series Table 4 Output voltage 2.0 V 2.5 V 2.7 V 2.8 V 3.0 V 3.3 V 3.5 V 3.6 V 3.8 V 4.0 V 4.5 V 4.6 V 5.0 V 5.5 V S-8353AxxMC Series S-8353A20MC-IQFT2x S-8353A25MC-IQKT2x S-8353A27MC-IQMT2x S-8353A28MC-IQNT2x S-8353A30MC-IQPT2x S-8353A33MC-IQST2x S-8353A35MC-IQUT2x - S-8353A38MC-IQXT2x - S-8353A45MC-IRET2x - S-8353A50MC-IRJT2x S-8353A55MC-IROT2x S-8353AxxMA Series - - - - S-8353A30MA-IQPT S-8353A33MA-IQST - - - - - - S-8353A50MA-IRJT - S-8353AxxUA Series - - - - S-8353A30UA-IQPT2x S-8353A33UA-IQST2x - S-8353A36UA-IQVT2x S-8353A38UA-IQXT2x S-8353A40UA-IQZT2x - - S-8353A50UA-IRJT2x S-8353A55UA-IROT2x S-8353CxxMA Series - - - - S-8353C30MA-ISPT - - - - - - S-8353C46MA-ITFT - - Table 5 Output voltage 2.0 V 2.6 V 2.8 V 3.0 V 3.1 V 3.2 V 3.3 V 3.5 V 3.7 V 3.8 V 4.0 V 4.5 V 5.0 V 6.0 V 6.5 V Remark 1. 2. 3. 4. 6 S-8353CxxUA Series S-8353DxxMC Series S-8353HxxMC Series S-8353HxxMA Series - S-8353D20MC-IUFT2x S-8353H20MC-IWFT2x - - - S-8353H26MC-IWLT2x - - - S-8353H28MC-IWNT2x - S-8353C30UA-ISPT2x S-8353D30MC-IUPT2x S-8353H30MC-IWPT2x S-8353H30MA-IWPT - - S-8353H31MC-IWQT2x - - - S-8353H32MC-IWRT2x - - - S-8353H33MC-IWST2x S-8353H33MA-IWST - - S-8353H35MC-IWUT2x - - - S-8353H37MC-IWWT2x - - - S-8353H38MC-IWXT2x - - - S-8353H40MC-IWZT2x - - - S-8353H45MC-IXET2x - - S-8353D50MC-IVJT2x S-8353H50MC-IXJT2x - - - S-8353H60MC-IXTT2x - - - S-8353H65MC-IXYT2x - Please contact the SII marketing department for products with an output voltage other than those specified above. x: G or U : 2G or 1U Please select products of environmental code = U for Sn 100%, halogen-free products. Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Table 6 Output voltage 1.8 V 2.0 V 2.1 V 2.5 V 3.0 V 3.3 V 3.6 V 5.0 V S-8353HxxUA Series - - - - - S-8353H33UA-IWST2x S-8353H36UA-IWVT2x S-8353H50UA-IXJT2x S-8353JxxMC Series S-8353J18MC-IYDT2x S-8353J20MC-IYFT2x S-8353J21MC-IYGT2x S-8353J25MC-IYKT2x S-8353J30MC-IYPT2x S-8353J33MC-IYST2x - S-8353J50MC-IZJT2x (2) S-8354 Series Table 7 Output voltage 2.0 V 2.7 V 2.8 V 3.0 V 3.3 V 3.5 V 3.8 V 4.0 V 5.0 V S-8354AxxMC Series - S-8354A27MC-JQMT2x - S-8354A30MC-JQPT2x S-8354A33MC-JQST2x - S-8354A38MC-JQXT2x S-8354A40MC-JQZT2x S-8354A50MC-JRJT2x S-8354AxxMA Series S-8354AxxUA Series S-8354A20MA-JQFT - S-8354A27MA-JQMT - S-8354A28MA-JQNT S-8354A28UA-JQNT2x S-8354A30MA-JQPT S-8354A30UA-JQPT2x S-8354A33MA-JQST S-8354A33UA-JQST2x - S-8354A35UA-JQUT2x - - - S-8354A40UA-JQZT2x S-8354A50MA-JRJT S-8354A50UA-JRJT2x S-8354CxxMA Series - - - S-8354C30MA-JSPT - - - - - Table 8 Output voltage 1.5 V 2.0 V 2.5 V 2.7V 3.0 V 3.1 V 3.3 V 3.5 V 4.0 V 4.2 V 4.5 V 4.7 V 5.0 V Remark 1. 2. 3. 4. S-8354DxxMC Series S-8354HxxMC Series S-8354HxxUA Series S-8354JxxMC Series - - - S-8354J15MC-JYAT2x S-8354D20MC-JUFT2x - - S-8354J20MC-JYFT2x - S-8354H25MC-JWKT2x - - - S-8354H27MC-JWMT2x S-8354H27UA-JWMT2x - S-8354D30MC-JUPT2x S-8354H30MC-JWPT2x - S-8354J30MC-JYPT2x - S-8354H31MC-JWQT2x - - S-8354D33MC-JUST2x S-8354H33MC-JWST2x - S-8354J33MC-JYST2x - S-8354H35MC-JWUT2x - - - S-8354H40MC-JWZT2x - - - S-8354H42MC-JXBT2x - - - S-8354H45MC-JXET2x - - - S-8354H47MC-JXGT2x - - - S-8354H50MC-JXJT2x - S-8354J50MC-JZJT2x Please contact the SII marketing department for products with an output voltage other than those specified above. x: G or U : 2G or 1U Please select products of environmental code = U for Sn 100%, halogen-free products. Seiko Instruments Inc. 7 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Pin Configurations Table 9 A, C and H Types (Without shutdown function, VDD / VOUT non-separate type) SOT-23-3 Top view 1 Pin No. 1 2 3 2 Symbol VOUT VSS CONT Description Output voltage pin and IC power supply pin GND pin External inductor connection pin 3 Figure 4 Table 10 A and H Types (With shutdown function, VDD / VOUT non-separate type) SOT-23-5 Top view 5 1 4 2 3 Figure 5 Pin No. Symbol Description Shutdown pin 1 "H": Normal operation (Step-up operating) ON / OFF "L": Step-up stopped (Entire circuit stopped) 2 VOUT Output voltage pin and IC power supply pin NC*1 3 No connection 4 VSS GND pin 5 CONT External inductor connection pin *1. The NC pin indicates electrically open. Table 11 D and J Types (Without shutdown function, VDD / VOUT separate type) Pin No. Symbol Description 1 VOUT Output voltage pin 2 VDD IC power supply pin NC*1 3 No connection 4 VSS GND pin 5 CONT External inductor connection pin *1. The NC pin indicates electrically open. Table 12 A and H Types (Without shutdown function, VDD / VOUT non-separate type) SOT-89-3 Top view Pin No. 1 2 3 1 2 Symbol VSS VOUT CONT 3 Figure 6 8 Seiko Instruments Inc. Description GND pin Output voltage pin and IC power supply pin External inductor connection pin STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Absolute Maximum Ratings Table 13 Item (Ta = 25C unless otherwise specified) Absolute maximum rating Unit VSS - 0.3 to VSS + 12 V Symbol VOUT pin voltage VOUT VON / OFF *1 ON / OFF pin voltage *2 VDD pin voltage CONT pin voltage CONT pin current VDD VCONT ICONT SOT-23-3 Power dissipation SOT-23-5 PD SOT-89-3 Operating ambient temperature Topr Storage temperature Tstg *1. With shutdown function *2. For VDD / VOUT separate type *3. When mounted on board [Mounted board] (1) Board size : 114.3 mm x 76.2 mm x t1.6 mm (2) Board name : JEDEC STANDARD51-7 Caution V VSS - 0.3 to VSS + 12 VSS - 0.3 to VSS + 12 300 150 (When not mounted on board) 430*3 250 (When not mounted on board) 600*3 500 (When not mounted on board) 1000*3 -40 to + 85 -40 to + 125 V V mA mW mW mW mW mW mW C C The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. When mounted on board (2) When not mounted on board 600 Power dissipation (PD) [mW] 1200 Power dissipation (PD) [mW] (1) VSS - 0.3 to VSS + 12 1000 SOT-89-3 800 SOT-23-5 600 SOT-23-3 400 200 0 500 SOT-89-3 400 SOT-23-5 300 SOT-23-3 200 100 0 0 50 100 150 Ambient temperature (Ta) [C] Figure 7 0 50 100 150 Ambient temperature (Ta) [C] Power Dissipation of Packages Seiko Instruments Inc. 9 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Electrical Characteristics (1) 50 kHz Product (A and D Types) Table 14 Item Symbol Condition Output voltage VOUT - Input voltage Operation start voltage Oscillation start voltage VIN VST1 VST2 Operation holding voltage VHLD - IOUT = 1 mA No external parts, Voltage applied to VOUT IOUT = 1 mA, Judged by decreasing VIN voltage gradually S-835xx15 to 19 S-835xx20 to 29 S-835xx30 to 39 VOUT = VOUT(S) x 0.95 S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 S-835xx15 to 19 S-835xx20 to 29 S-835xx30 to 39 VOUT = VOUT(S) + 0.5 V S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 Current consumption 1 ISS1 Current consumption 2 ISS2 Current consumption during shutdown (With shutdown function) ISSS Switching current VON / OFF = 0 V S-835xx15 to 19 S-835xx20 to 24 S-835xx25 to 29 S-835xx30 to 39 S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 (Ta = 25C unless otherwise specified) Measurement Min. Typ. Max. Unit circuit VOUT(S) VOUT(S) VOUT(S) V 2 x 0.976 x 1.024 - - 10 V 2 - - 0.9 V 2 - - 0.8 V 1 0.7 - - V 2 - - - - - - - - - - - - 10.8 13.3 18.7 24.7 31.0 37.8 4.8 5.0 5.1 5.3 5.5 5.7 18.0 22.2 31.1 41.1 51.6 63.0 9.5 9.9 10.2 10.6 10.9 11.3 A A A A A A A A A A A A 1 1 1 1 1 1 1 1 1 1 1 1 - - 0.5 A 1 80 103 125 144 176 200 215 128 165 200 231 282 320 344 - - - - - - - mA mA mA mA mA mA mA 1 1 1 1 1 1 1 ISW VCONT = 0.4 V ISWQ VCONT = VOUT = 10 V - - 0.5 A 1 VOUT1 VOUT2 VOUT Ta * VOUT VIN = VOUT(S) x 0.4 to x 0.6 IOUT = 10 A to VOUT(S) / 250 x 1.25 - - 30 30 60 60 mV mV 2 2 Ta = -40C to +85C - 50 - ppm / C 2 fOSC MaxDuty VOUT = VOUT(S) x 0.95 VOUT = VOUT(S) x 0.95 42.5 75 50 83 57.5 90 kHz % 1 1 PFMDuty VIN = VOUT(S) - 0.1 V, No-load 10 15 24 % 1 VSH VSL1 VSL2 Measured oscillation at CONT pin Judged oscillation stop at At VOUT1.5 V CONT pin At VOUT<1.5 V 0.75 - - - - - - 0.3 0.2 V V V 1 1 1 ON / OFF pin input current (With shutdown function) ISH VON / OFF = VOUT(S) x 0.95 - 0.1 - 0.1 A 1 ISL VON / OFF = 0 V - 0.1 - 0.1 A 1 Soft start time Efficiency tSS EFFI 3.0 - 6.0 85 12.0 - ms % 2 2 Switching transistor leakage current Line regulation Load regulation Output voltage temperature coefficient Oscillation frequency Maximum duty ratio PWM / PFM switching duty ratio (For S-8354 Series) ON / OFF pin input voltage (With shutdown function) 10 - - Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series External parts Coil: CDRH6D28-101 of Sumida Corporation Diode: MA2Z748 (Shottky type) of Matsushita Electric Industrial Co., Ltd. Capacitor: F93 (16 V, 22 F tantalum type) of Nichicon Corporation VIN = VOUT(S) x 0.6 applied, IOUT = VOUT(S) / 250 ON / OFF pin is connected to VOUT With shutdown function : For VDD / VOUT separate type : VDD pin is connected to VOUT pin Remark 1. VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage. 2. VDD / VOUT separate type A step-up operation is performed from VDD = 0.8 V. However, 1.8 VVDD10 V is recommended stabilizing the output voltage and oscillation frequency. (VDD1.8 V must be applied for products with a set value of less than 1.9 V.) Seiko Instruments Inc. 11 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series (2) 30 kHz Product (C Type) Table 15 Item Symbol Condition Output voltage VOUT - Input voltage Operation start voltage Oscillation start voltage VIN VST1 VST2 Operation holding voltage VHLD - IOUT = 1 mA No external parts, Voltage applied to VOUT IOUT = 1 mA, Judged by decreasing VIN voltage gradually S-835xx20 to 29 S-835xx30 to 39 VOUT = VOUT(S) x 0.95 S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 S-835xx20 to 29 S-835xx30 to 39 VOUT = VOUT(S) + 0.5 V S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 S-835xx20 to 24 S-835xx25 to 29 S-835xx30 to 39 VCONT = 0.4 V S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 Current consumption 1 ISS1 Current consumption 2 ISS2 Switching current ISW (Ta = 25C unless otherwise specified) Measurement Min. Typ. Max. Unit circuit VOUT(S) VOUT(S) VOUT(S) V 2 x 0.976 x 1.024 - - 10 V 2 - - 0.9 V 2 - - 0.8 V 1 0.7 - - V 2 - - - - - - - - - - 52 62 72 88 100 108 9.8 13.1 16.8 20.7 24.8 435 4.7 4.9 5.1 5.2 83 100 115 141 160 172 16.4 21.9 28.0 34.5 41.4 9.0 9.4 9.7 10.1 10.4 - - - - - - A A A A A A A A A A mA mA mA mA mA mA 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 - 0.5 A 1 30 30 60 60 mV mV 2 2 50 - ppm / C 2 30 83 35 90 kHz % 1 1 15 24 % 1 6.0 84 12.0 - ms % 2 2 Switching transistor leakage ISWQ VCONT = VOUT = 10 V - current Line regulation VOUT1 VIN = VOUT(S) x 0.4 to x 0.6 - Load regulation VOUT2 IOUT = 10 A to VOUT(S) / 250 x 1.25 - VOUT Output voltage temperature - Ta = -40C to +85C Ta * VOUT coefficient Oscillation frequency fOSC VOUT = VOUT(S) x 0.95 25 Maximum duty ratio MaxDuty VOUT = VOUT(S) x 0.95 75 PWM / PFM switching duty PFMDuty VIN = VOUT(S) - 0.1 V, No-load 10 ratio (For S-8354 Series) Soft start time tSS - 3.0 Efficiency EFFI - - External parts Coil: CDRH6D28-101 of Sumida Corporation Diode: MA2Z748 (Shottky type) of Matsushita Electric Industrial Co., Ltd. Capacitor: F93 (16 V, 22 F tantalum type) of Nichicon Corporation VIN = VOUT(S) x 0.6 applied, IOUT = VOUT(S) / 250 Remark 12 VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage. Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series (3) 250 kHz Product (H and J Types) Table 16 Item Symbol Condition Output voltage VOUT - Input voltage Operation start voltage Oscillation start voltage VIN VST1 VST2 Operation holding voltage VHLD - IOUT = 1 mA No external parts, Voltage applied to VOUT IOUT = 1 mA, Judged by decreasing VIN voltage gradually S-835xx15 to 19 S-835xx20 to 29 S-835xx30 to 39 VOUT = VOUT(S) x 0.95 S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 S-835xx15 to 19 S-835xx20 to 29 S-835xx30 to 39 VOUT = VOUT(S) + 0.5 V S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 Current consumption 1 ISS1 Current consumption 2 ISS2 Current consumption during shutdown (With shutdown function) ISSS Switching current VON / OFF = 0 V S-835xx15 to 19 S-835xx20 to 24 S-835xx25 to 29 S-835xx30 to 39 S-835xx40 to 49 S-835xx50 to 59 S-835xx60 to 65 (Ta = 25C unless otherwise specified) Measurement Min. Typ. Max. Unit circuit VOUT(S) VOUT(S) VOUT(S) V 2 x 0.976 x 1.024 - - 10 V 2 - - 0.9 V 2 - - 0.8 V 1 0.7 - - V 2 - - - - - - - - - - - - 36.5 48.3 74.3 103.1 134.1 167.0 9.1 9.3 9.5 9.7 9.8 10.0 60.8 80.5 123.8 171.9 223.5 278.4 18.2 18.6 18.9 19.3 19.6 19.9 A A A A A A A A A A A A 1 1 1 1 1 1 1 1 1 1 1 1 - - 0.5 A 1 80 103 125 144 176 200 215 128 165 200 231 282 320 344 - - - - - - - mA mA mA mA mA mA mA 1 1 1 1 1 1 1 ISW VCONT = 0.4 V ISWQ VCONT = VOUT = 10 V - - 0.5 A 1 VOUT1 VOUT2 VOUT Ta * VOUT VIN = VOUT(S) x 0.4 to x 0.6 IOUT = 10 A to VOUT(S) / 250 x 1.25 - - 30 30 60 60 mV mV 2 2 Ta = -40C to +85C - 50 - ppm / C 2 fOSC MaxDuty VOUT = VOUT(S) x 0.95 VOUT = VOUT(S) x 0.95 212.5 70 250 78 287.5 85 kHz % 1 1 PFMDuty VIN = VOUT(S) - 0.1 V, No-load 10 15 24 % 1 VSH VSL1 VSL2 Measured oscillation at CONT pin Judged oscillation stop at At VOUT1.5 V CONT pin At VOUT<1.5 V 0.75 - - - - - - 0.3 0.2 V V V 1 1 1 ON / OFF pin input current (With shutdown function) ISH VON / OFF = VOUT(S) x 0.95 - 0.1 - 0.1 A 1 ISL VON / OFF = 0 V - 0.1 - 0.1 A 1 Soft start time Efficiency tSS EFFI 1.8 - 3.6 85 7.2 - ms % 2 2 Switching transistor leakage current Line regulation Load regulation Output voltage temperature coefficient Oscillation frequency Maximum duty ratio PWM / PFM switching duty ratio (For S-8354 Series) ON / OFF pin input voltage (With shutdown function) - - Seiko Instruments Inc. 13 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series External parts Coil: CDRH6D28-220 of Sumida Corporation Diode: MA2Z748 (Shottky type) of Matsushita Electric Industrial Co., Ltd. Capacitor: F93 (16 V, 22 F tantalum type) of Nichicon Corporation VIN = VOUT(S) x 0.6 applied, IOUT = VOUT(S) / 250 ON / OFF pin is connected to VOUT With shutdown function : For VDD / VOUT separate type : VDD pin is connected to VOUT pin Remark 14 1. VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage. 2. VDD / VOUT separate type A step-up operation is performed from VDD = 0.8 V. However, 1.8 VVDD10 V is recommended stabilizing the output voltage and oscillation frequency. (VDD1.8 V must be applied for products with a set value of less than 1.9 V.) Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Measurement Circuits 300 1. Oscilloscope CONT ON / OFF *1 VSS VOUT VDD A *2 0.1 F + - Figure 8 2. + - CONT VOUT VDD*2 VSS ON / OFF + - V *1 0.1 F Figure 9 *1. With shutdown function *2. For VDD / VOUT separate type Seiko Instruments Inc. 15 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Operation 1. Switching Control Types 1. 1 PWM Control (S-8353 Series) The S-8353 Series is a DC-DC converter using a pulse width modulation method (PWM) and features low current consumption. In conventional PFM DC-DC converters, pulses are skipped when the output load current is low, causing a fluctuation in the ripple frequency of the output voltage, resulting in an increase in the ripple voltage. In the S-8353 Series, the switching frequency does not change, although the pulse width changes from 0% to 83% (78% for H and J type) corresponding to each load current. The ripple voltage generated from switching can thus be removed easily using a filter because the switching frequency is constant. 1. 2 PWM / PFM Switching Control (S-8354 Series) The S-8354 Series is a DC-DC converter that automatically switches between a pulse width modulation method (PWM) and a pulse frequency modulation method (PFM), depending on the load current, and features low current consumption. The S-8354 Series operates under PWM control with the pulse width duty changing from 15% to 83% (78% for H and J type) in a high output load current area. On the other hand, the S-8354 Series operates under PFM control with the pulse width duty fixed at 15% in a low output load current area, and pulses are skipped according to the load current. The oscillation circuit thus oscillates intermittently so that the resultant lower self current consumption can prevent a reduction in the efficiency at a low load current. The switching point from PWM control to PFM control depends on the external devices (coil, diode, etc.), input voltage, and output voltage. This series are an especially efficient DC-DC converter at an output current around 100 A. 2. Soft Start Function For this IC, a built-in soft start circuit controls the rush current and overshoot of the output voltage when the power is turned on or the ON / OFF pin is set to "H" level. 16 Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 3. ON / OFF Pin (Shutdown Pin) (SOT-23-5 Package Products of A and H Types) ON / OFF pin stops or starts step-up operation. Setting the ON / OFF pin to the "L" level stops operation of all the internal circuits and reduces the current consumption significantly. DO NOT use the ON / OFF pin in a floating state because it has the structure shown in Figure 10 and is not pulled up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0.75 V to the ON / OFF pin because applying such a voltage increases the current consumption. If the ON / OFF pin is not used, connect it to the VOUT pin. The ON / OFF pin does not have hysteresis. Table 17 ON / OFF pin CR oscillation circuit Output voltage "H" Operation Fixed VIN*1 "L" Stop *1. Voltage obtained by subtracting the voltage drop due to the DC resistance of the inductor and the diode forward voltage from VIN. VOUT ON / OFF VSS Figure 10 ON/ OFF Pin Structure Seiko Instruments Inc. 17 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 4. Operation The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 11.) L CONT D VIN VOUT M1 + EXT - CL VSS Figure 11 Step-Up Switching Regulator Circuit for Basic Equation Voltage at CONT pin at the moment M1 is turned ON (VA) *1 : VA = VS *2 *1. Current flowing through L (IL) is zero. *2. Non-saturated voltage of M1. The change in IL over time : dIL VL VIN - VS = = dt L L (2) Integration of equation (2) (IL) : V - VS IL = IN *t L (3) IL flows while M1 is ON (tON). The time of tON is determined by the oscillation frequency of OSC. The peak current (IPK) after tON : V - VS IPK = IN * t ON L The energy stored in L is represented by 1/2 * L (IPK)2. When M1 is turned OFF (tOFF), the energy stored in L is emitted through a diode to the output capacitor. Then, the reverse voltage (VL) is generated : VL = (VOUT + VD*1) - VIN *1. Diode forward voltage The voltage at CONT pin rises only by VOUT+VD. The change in the current (IL) flowing through the diode into VOUT during tOFF : dIL VL VOUT + VD - VIN = = dt L L 18 (1) Seiko Instruments Inc. (4) (5) (6) STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Integration of the equation (6) is as follows : + VD - VIN V IL = IPK - OUT *t L (7) During tON, the energy is stored in L and is not transmitted to VOUT. When receiving the output current (IOUT) from VOUT, the energy of the capacitor (CL) is consumed. As a result, the pin voltage of CL is reduced, and goes to the lowest level after M1 is turned ON (tON). When M1 is turned OFF, the energy stored in L is transmitted through the diode to CL, and the voltage of CL rises rapidly. VOUT is a time function, and therefore indicates the maximum value (ripple voltage (VP-P) ) when the current flowing through into VOUT and load current (IOUT) match. Next, the ripple voltage is determined as follows. IOUT vs. t1 (time) from when M1 is turned OFF (after tON) to when VOUT reaches the maximum level : + VD - VIN V IOUT = IPK - OUT (8) * t1 L L t1 = (IPK - IOUT ) * VOUT + VD - VIN (9) When M1 is turned OFF (tOFF), IL = 0 (when the energy of the inductor is completely transmitted). Based on equation (7) : t OFF L = (10) V OUT + VD - VIN IPK When substituting equation (10) for equation (9) : I t1 = t OFF - OUT * t OFF IPK (11) Electric charge Q1 which is charged in CL during t1 : t1 t1 t1 V + VD - VIN V + VD - VIN 1 2 Q1 = IL dt = IPK * dt - OUT * tdt = IPK * t1 - OUT * t1 0 0 0 L L 2 When substituting equation (12) for equation (9) : 1 I +I Q1 = IPK - (IPK - IOUT ) * t1 = PK OUT * t1 2 2 A rise in voltage (VP-P) due to Q 1 : Q1 1 IPK + IOUT = * VP -P = * t1 CL CL 2 (12) (13) (14) When taking into consideration IOUT to be consumed during t1 and the Equivalent Series Resistance (RESR) of CL : Q1 1 IPK + IOUT I *t I +I = * (15) VP -P = * t1 + PK OUT * RESR - OUT 1 CL CL 2 2 C L When substituting equation (11) for equation (15) : (I - I )2 t I +I VP -P = PK OUT * OFF + PK OUT * RESR 2IPK CL 2 (16) Therefore to reduce the ripple voltage, it is important that the capacitor connected to the output pin has a large capacity and a small RESR. Seiko Instruments Inc. 19 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series External Parts Selection The relationship between the major characteristics of the step-up circuit and the characteristic parameters of the external parts is shown in Figure 12. For higher efficiency ? For larger output current ? For smaller ripple voltage ? At PFM control At PWM control Larger inductance Smaller inductance Smaller direct current resistance of inductor Larger output capacitance Figure 12 Larger output capacitance Relationship between Major Characteristics of Step-up Circuit and External Parts 1. Inductor The inductance value (L value) has a strong influence on the maximum output current (IOUT) and efficiency (). The peak current (IPK) increases by decreasing L value and the stability of the circuit improves and IOUT increases. If L value is decreased, the efficiency falls causing a decline in the current drive capacity for the switching transistor, and IOUT decreases. The loss of IPK by the switching transistor decreases by increasing L and the efficiency becomes maximum at a certain L value. Further increasing L value decreases the efficiency due to the loss of the direct current resistance of the coil. IOUT also decreases. A higher oscillation frequency allows selection of a lower L value, making the coil smaller. The recommended inductances are a 47 H to 220 H for A, C, and D types, a 10 H to 47 H for H and J types. Be careful of the allowable inductor current when choosing an inductor. Exceeding the allowable current of the inductor causes magnetic saturation, much lower efficiency and destruction of the IC chip due to a large current. Choose an inductor so that IPK does not exceed the allowable current. IPK in discontinuous mode is calculated by the following equation: IPK = 2 IOUT ( VOUT + VD - VIN ) (A) fOSC * L (17) fosc = oscillation frequency, VD 0.4 V. 2. Diode Use an external diode that meets the following requirements : * Low forward voltage : VF < 0.3 V * High switching speed : 50 ns max. * Reverse voltage : VOUT + VF or more * Current rate : IPK or more 20 Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 3. Capacitor (CIN, CL) A capacitor on the input side (CIN) improves the efficiency by reducing the power impedance and stabilizing the input current. Select a CIN value according to the impedance of the power supply used. A capacitor on the output side (CL) is used for smoothing the output voltage. For step-up types, the output voltage flows intermittently to the load current, so step-up types need a larger capacitance than step-down types. Therefore, select an appropriate capacitor in accordance with the ripple voltage, which increases in case of a higher output voltage or a higher load current. The capacitor value should be 10 F or more. Select an appropriate capacitor the equivalent series resistance (RESR) for stable output voltage. The stable voltage range in this IC depends on the RESR. Although the inductance value (L value) is also a factor, an RESR of 30 to 500 m maximizes the characteristics. However, the best RESR value may depend on the L value, the capacitance, the wiring, and the applications (output load). Therefore, fully evaluate the RESR under the actual operating conditions to determine the best value. Refer to the "1. Example of Ceramic Capacitor Application" (Figure 16) in the " Application Circuit" for the circuit example using a ceramic capacitor and the external resistance of the capacitor (RESR). 4. VDD / VOUT Separate Type (D and J Types) The D and J types provides separate internal circuit power supply (VDD pin) and output voltage setting pin (VOUT pin) in the IC, making it ideal for the following applications. (1) When changing the output voltage with external resistance. (2) When outputting a high voltage within the operating voltage (10 V). Choose the products in the Table 18 according to the applications (1) or (2) above. Table 18 Output voltage (VCC) S-835xx18 S-835xx50 Connection to VDD pin 1.8 V VCC < 5 V Yes - VIN or VCC 5 V VCC 10 V - Yes VIN Cautions 1. This IC starts a step-up operation at VDD = 0.8 V, but set 1.8 VDD 10 V to stabilize the output voltage and frequency of the oscillator. (Input a voltage of 1.8 V or more at the VDD pin for all products with a setting less than 1.9 V.) An input voltage of 1.8 V or more at the VDD pin allows connection of the VDD pin to either the input voltage VIN pin or output VOUT pin. 2. Choose external resistors RA and RB so as to not affect the output voltage, considering that there is impedance between the VOUT pin and VSS pin in the IC chip. The internal resistance between the VOUT pin and VSS pin is as follows : (1) S-835xx18 : 2.1 M to 14.8 M (2) S-835xx20 : 1.4 M to 14.8 M (3) S-835xx30 : 1.4 M to 14.2 M (4) S-835xx50 : 1.4 M to 12.1 M 3. Attach a capacitor (CC) in parallel to the RA resistance when an unstable event such as oscillation of the output voltage occurs. Calculate CC using the following equation : 1 CC [ F ] = 2 * * R A * 20 kHz Seiko Instruments Inc. 21 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Standard Circuits (1) S-8353AxxMA / UA, S-8353CxxMA, S-8353HxxMA/UA, S-8354AxxMA/UA, S-8354CxxMA, S-8354HxxMA / UA SD L VOUT CONT Oscillation circuit VIN CIN + PWM control circuit or PWM / PFM switching control circuit - Soft start built-in reference power supply Remark IC internal power supply + CL - Phase compensating circuit + - VSS The power supply for the IC chip is from the VOUT pin. Figure 13 (2) S-8353AxxMC, S-8353HxxMC, S-8354AxxMC, S-8354HxxMC SD L VOUT CONT Oscillation circuit VIN CIN + PWM control circuit or PWM / PFM switching control circuit - Soft start built-in reference power supply IC internal power supply - Phase compensating circuit ON / OFF Remark The power supply for the IC chip is from the VOUT pin. Figure 14 22 + Seiko Instruments Inc. CL VSS + - STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series (3) S-8353DxxMC, S-8353JxxMC, S-8354DxxMC, S-8354JxxMC SD L VDD CONT Oscillation circuit VIN CIN + - PWM control circuit or PWM / PFM switching control circuit Soft start built-in reference power supply Remark IC internal power supply CC RA + + - Phase compensating circuit - VOUT CL RB VSS The power supply for the IC chip is from the VOUT pin. Figure 15 Caution The Above connection diagram will not guarantee successful operation. evaluation using the actual application to set the constant. Seiko Instruments Inc. Perform through 23 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Precautions * Mount external capacitors, diodes, and coils as close as possible to the IC. Especially, mounting the output capacitor (capacitor between VDD pin and VSS pin for VDD / VOUT separate type) in the power supply line of the IC close to the IC can enable stable output characteristics. If it is impossible, it is recommended to mount and wire a ceramic capacitor of around 0.1 F close to the IC. * Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows at the time of a power supply injection. Because these largely depend on the coil, the capacitor and impedance of power supply used, fully check them using an actually mounted model. * Make sure that the dissipation of the switching transistor (especially at a high temperature) does not exceed the allowable power dissipation of the package. * The performance of this IC varies depending on the design of the PCB patterns, peripheral circuits and external parts. Thoroughly test all settings with your device. The recommended external part should be used wherever possible, but if this is not possible for some reason, contact an SII sales person. * Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. * SII claims no responsibility for any and all disputes arising out of or in connection with any infringement of the products including this IC upon patents owned a third party. 24 Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Application Circuits 1. Using Ceramic Capacitor Example When using small RESR parts such as ceramic capacitors for the output capacitance, mount a resistor (R1) corresponding to the RESR in series with the ceramic capacitor (CL) as shown in Figure 16. R1 differs depending on L value, the capacitance, the wiring, and the application (output load). The following example shows a circuit using R1 = 100 m, output voltage = 3.3 V, output load = 100 mA and its characteristics. VOUT SD L VIN R1 CONT CIN VOUT VSS Figure 16 CL Using Ceramic Capacitor Circuit Example Table 19 IC L Type Name SD Type Name S-8353A33 CDRH5D28-101 MA2Z748 Caution CL (Ceramic capacitor) 10 F x 2 R1 100 m The Above connection diagram and constant will not guarantee successful operation. through evaluation using the actual application to set the constant. Seiko Instruments Inc. Perform 25 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 2. Output Characteristics of The Using Ceramic Capacitor Circuit Example The data of the step-up characteristics (a) Output current (IOUT) vs. Efficiency () characteristics, (b) Output current (IOUT) vs. Output voltage (VOUT) characteristics, (c) Output Current (IOUT) vs. Ripple voltage (Vr) under conditions in Table 19 is shown below. 100 3.40 80 3.35 VOUT [V] (b) Output current (IOUT) vs. Output voltage (VOUT) [%] (a) Output current (IOUT) vs. Efficiency () 60 40 VIN = 0.9 V VIN = 1.8 V VIN = 2.7 V 20 0 0.01 0.1 1 10 IOUT [mA] 100 3.30 3.25 1000 3.20 0.01 (c) Output current (IOUT) vs. Ripple voltage (Vr) 140 120 Vr [mV] 100 VIN = 0.9 V VIN = 1.8 V VIN = 2.7 V 80 60 40 20 0 0.01 26 0.1 1 10 IOUT [mA] 100 1000 Seiko Instruments Inc. VIN = 0.9 V VIN = 1.8 V VIN = 2.7 V 0.1 1 10 IOUT [mA] 100 1000 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Characteristics (Typical Data) Example of Major Temperature characteristics (Ta = -40C to +85C, VOUT = 3.3 V) (1) Current Consumption 1 (ISS1) vs. Temperature (Ta) fOSC = 250 kHz 50 50 40 40 ISS1 [A] ISS1 [A] fOSC = 50 kHz 30 20 0 -40 -20 30 20 10 10 0 20 40 60 Ta [C] 0 -40 -20 80 100 0 20 40 60 Ta [C] 80 100 (2) Current Consumption 2 (ISS2) vs. Temperature (Ta) fOSC = 250 kHz 10 10 8 8 ISS2 [A] ISS2 [A] fOSC = 50 kHz 6 4 2 0 -40 -20 6 4 2 0 20 40 60 Ta [C] 0 -40 -20 80 100 0 20 40 Ta [C] 60 80 100 (3) Current Consumption at Shutdown (ISSS) vs. Temperature (Ta) fOSC = 250 kHz 1.0 ISSS [A] 0.8 0.6 0.4 0.2 0 -40 -20 0 20 40 Ta [C] 60 80 100 (4) Switching Current (ISW) vs. Temperature (Ta) (5) Switching Transistor Leakage Current (ISWQ) vs. Temperature (Ta) fOSC = 250 kHz fOSC = 250 kHz 500 1.0 400 0.8 ISWQ [A] ISW [mA] 1. 300 200 100 0 -40 -20 0.6 0.4 0.2 0 20 40 Ta [C] 60 80 100 Seiko Instruments Inc. 0 -40 -20 0 20 40 Ta [C] 60 80 100 27 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series (6) Oscillation Frequency (fOSC) vs. Temperature (Ta) fOSC = 250 kHz 350 60 300 fOSC [kHz] fOSC [kHz] fOSC = 50 kHz 70 50 40 30 -40 -20 0 20 40 Ta [C] 250 200 150 -40 -20 0 60 80 100 20 40 Ta [C] 60 80 100 (7) Maximum Duty Ratio (MaxDuty) vs. Temperature (Ta) fOSC = 50 kHz fOSC = 250 kHz 90 90 MaxDuty [%] 100 MaxDuty [%] 100 80 70 60 50 -40 -20 0 20 40 60 Ta [C] 70 60 50 -40 -20 80 100 (8) PWM / PFM Switching Duty Ratio (PFMDuty) vs. Temperature (Ta) (S-8354 Series) 80 0 fOSC = 250 kHz fOSC = 250 kHz VSH [V] PFMDuty [%] 0.8 15 10 0.6 0.4 0.2 0 20 40 60 Ta [C] 0 -40 -20 80 100 (10) ON / OFF Pin Input Voltage "L" 1 (VSL1) vs. Temperature (Ta) (S-8354 Series) 0 60 80 100 fOSC = 250 kHz 1.0 1.0 0.8 0.8 VSL2 [V] VSL1 [V] 20 40 Ta [C] (11) ON / OFF Pin Input Voltage "L" 2 (VSL2) vs. Temperatuer (Ta) fOSC = 250 kHz 0.6 0.4 0.2 28 80 100 1.0 20 0 -40 -20 60 (9) ON / OFF Pin Input Voltage "H" (VSH) vs. Temperature (Ta) 25 5 -40 -20 20 40 Ta [C] 0.6 0.4 0.2 0 20 40 60 Ta [C] 80 100 Seiko Instruments Inc. 0 -40 -20 0 20 40 Ta [C] 60 80 100 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series (12) Soft Start Time (tSS) vs. Temperature (Ta) fOSC = 250 kHz 8 6 6 tSS [ms] tSS [ms] fOSC = 50 kHz 8 4 2 4 2 0 -40 -20 0 20 40 Ta [C] 0 -40 -20 60 80 100 (13) Operation Start Voltage (VST1) vs. Temperature (Ta) 0 20 40 Ta [C] fOSC = 250 kHz fOSC = 250 kHz 1.2 1.0 1.0 0.8 0.8 VST2 [V] VST1 [V] 80 100 (14) Oscillation Start Voltage (VST2) vs. Temperature (Ta) 1.2 0.6 0.4 0.6 0.4 0.2 0.2 0 -40 -20 60 0 20 40 Ta [C] 60 0 -40 -20 80 100 0 20 40 Ta [C] 60 80 100 (15) Output Voltage (VOUT) vs. Temperature (Ta) fOSC = 250 kHz 3.40 3.35 3.35 VOUT [V] VOUT [V] fOSC = 50 kHz 3.40 3.30 3.25 3.25 3.20 -40 -20 3.30 0 20 40 Ta [C] 60 80 100 Seiko Instruments Inc. 3.20 -40 -20 0 20 40 Ta [C] 60 80 100 29 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 2. Examples of Major Power Supply Dependence Characteristics (Ta = 25C) (1) Current Consumption 1 (ISS1) vs. Power Supply Voltage (VDD), Current Consumption 2 (ISS2) vs. Power Supply Voltage (VDD) VOUT = 3.3 V, fOSC = 250 kHz 100 40 80 ISS1, ISS2 [A] ISS1, ISS2 [A] VOUT = 3.3 V, fOSC = 50 kHz 50 30 20 10 60 40 20 0 0 2 4 6 VDD [V] 8 0 10 0 2 4 6 VDD [V] 8 10 (2) Oscillation Frequency (fOSC) vs. Power Supply Voltage (VDD) fOSC = 250 kHz 300 60 250 fOSC [kHz] fOSC [kHz] fOSC = 50 kHz 70 50 40 200 150 100 30 0 2 4 6 VDD [V] 8 0 10 2 4 6 VDD [V] 8 10 (3) Switching Current (ISW) vs. Power Supply Voltage (VDD) 500 ISW [mA] 400 300 200 100 0 0 2 4 6 VDD [V] 8 10 (4) Output Voltage (VOUT) vs. Power Supply Voltage (VDD) (VOUT = 3.3 V, VIN = 1.98 V, IOUT = 13.2 mA, VDD Separate Type) 3.3 3.3 3.2 3.1 3.2 3.1 3.0 3.0 0 30 fOSC = 250 kHz 3.4 VOUT [V] VOUT [V] fOSC = 50 kHz 3.4 2 4 6 VDD [V] 8 10 Seiko Instruments Inc. 0 2 4 6 VDD [V] 8 10 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 3. Output Waveforms (VIN = 1.98 V) (1) S-8353A33 IOUT = 10 mA Output voltage [0.01 V / div] IOUT = 50 mA Output voltage [0.01 V / div] CONT voltage [1 V / div] CONT voltage [1 V / div] t [10 s / div] t [10 s / div] IOUT = 100 mA Output voltage [0.02 V / div] CONT voltage [1 V / div] t [10 s / div] (2) S-8354H33 IOUT = 100 A IOUT = 10 mA Output voltage [0.01 V / div] Output voltage [0.01 V / div] CONT voltage [1 V / div] CONT voltage [1 V / div] t [2 s / div] t [2 s / div] IOUT = 50 mA IOUT = 100 mA Output voltage [0.02 V / div] Output voltage [0.02 V / div] CONT voltage [1 V / div] CONT voltage [1 V / div] t [2 s / div] t [2 s / div] Seiko Instruments Inc. 31 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 4. Examples of Transient Response Characteristics (Ta = 25C, 250 kHz, S-8354H33) (1) Power-On (VIN : 0 V 2.0 V) 2 0 0 4 2 2 4 2 0 t [1 ms / div] VOUT [V] VIN [V] IOUT = 50 mA VOUT [V] VIN [V] IOUT = 1 mA 0 t [1 ms / div] (2) ON/ OFF Pin Response ( VON / OFF : 0 V 2.0 V, VIN = 2 V) 2 0 4 2 2 4 0 2 0 t [1 ms / div] VOUT [V] VON/OFF [V] IOUT = 50 mA VOUT [V] VON/OFF [V] IOUT = 1 mA 0 t [1 ms / div] (3) Load Fluctuations (VIN = 1.98 V) 100 A 50 mA 50 mA IOUT IOUT 50 mA 50 mA 100 A 100 A VOUT [0.05 V / div] 100 A VOUT [0.05 V / div] t [200 s / div] t [5 ms / div] (4) Input Voltage Fluctuations (IOUT = 50 mA) VIN = 2.64 V 1.98 V VIN [V] VIN [V] VIN = 1.98 V 2.64 V 2.64 1.98 2.64 1.98 VOUT [0.04 V / div] VOUT [0.02 V / div] t [100 s / div] 32 t [100 s / div] Seiko Instruments Inc. STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Reference Data Reference data is provided to determine specific external components. Therefore, the following data shows the characteristics of the recommended external components selected for various applications. 1. External Parts for Reference Data Table 20 Efficiency vs. Output Current Characteristics and Output Voltage vs. Output Current Characteristics for External Parts Condition Product Name 1 2 3 4 5 6 7 8 S-8353H50MC S-8353H50MC S-8353H50MC S-8354A50MC S-8354A50MC S-8353A50MC S-8353A50MC S-8353A33MC Oscillation frequency 250 kHz 250 kHz 250 kHz 50 kHz 50 kHz 50 kHz 50 kHz 50 kHz Output voltage Control system 5.0 V 5.0 V 5.0 V 5.0 V 5.0 V 5.0 V 5.0 V 3.3 V PWM PWM PWM PWM / PFM PWM / PFM PWM PWM PWM Inductor Diode Output capacitor CDRH8D28-220 F93 (16 V, 47 F) CDRH5D28-220 F93 (6.3 V, 22 F) CXLP120-220 F92 (6.3 V, 47 F) CDRH8D28-101 F93 (6.3 V, 22 F) MA2Z748 CXLP120-470 F92 (6.3 V, 47 F) CDRH8D28-101 F93 (6.3 V, 22 F) CXLP120-470 F92 (6.3 V, 47 F) CDRH8D28-101 F93 (6.3 V, 22 F) The properties of the external parts are shown below. Table 21 Properties of External Parts Component Product name Manufacturer CDRH8D28-220 CDRH8D28-101 Inductor CDRH5D28-220 CXLP120-220 CXLP120-470 Diode MA2Z748 F93 (16 V, 47 F) F93 (6.3 V, 22 F) F92 (6.3 V, 47 F) *1. Direct current resistance *2. Maximum allowable current *3. Forward voltage *4. Forward current Capacitor Caution Sumida Corporation Sumitomo Special Metals Co., Ltd. Matsushita Electric Industrial Co., Ltd. Nichicon Corporation Characteristics 22 H, DCR*1 = 95 m, IMAX.*2 = 1.6 A, Component height = 3.0 mm 100 H, DCR*1 = 410 m, IMAX.*2 = 0.75 A, Component height = 3.0 mm 22 H, DCR*1 = 122 m, IMAX.*2 = 0.9 A, Component height = 3.0 mm 22 H, DCR*1 = 590 m, IMAX.*2 = 0.55 A, Component height = 1.2 mm 47 H, DCR*1 = 950 m, IMAX.*2 = 0.45 A, Component height = 1.2 mm VF*3 = 0.4 V, IF*4 = 0.3 A - The values shown in the characteristics column of Table 21 above are based on the materials provided by each manufacture. However, consider the characteristics of the original materials when using the above products. Seiko Instruments Inc. 33 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 2. Output Current (IOUT) vs. Efficiency () Characteristics, Output Current (IOUT) vs. Output Voltage (VOUT) Characteristics The following shows the actual (a) Output current (IOUT) vs. Efficiency () characteristics and (b) Output current (IOUT) vs. Output voltage (VOUT) characteristics under the conditions of No. 1 to 8 in Table 20. Condition 1 S-8353H50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 VOUT [V] [%] 80 60 VIN = 2 V VIN = 3 V VIN = 4 V 40 20 0.01 0.1 1 10 IOUT [mA] 100 5.0 4.9 4.8 4.7 0.01 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 Condition 2 S-8353H50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 VOUT [V] [%] 80 60 VIN = 2 V VIN = 3 V VIN = 4 V 40 20 0.01 0.1 1 10 IOUT [mA] 100 5.0 4.9 4.8 4.7 0.01 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 Condition 3 S-8353H50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 VOUT [V] [%] 80 60 VIN=2 V VIN=3 V VIN=4 V 40 20 0.01 0.1 1 10 IOUT [mA] 100 5.0 4.9 4.8 4.7 0.01 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 Condition 4 S-8354A50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 60 VIN = 2 V VIN = 3 V VIN = 4 V 40 20 0.01 34 VOUT [V] [%] 80 0.1 1 10 IOUT [mA] 100 5.0 4.9 4.8 1000 4.7 0.01 Seiko Instruments Inc. VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series Condition 5 S-8354A50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 VOUT [V] [%] 80 60 VIN = 2 V VIN = 3 V VIN = 4 V 40 20 0.01 0.1 1 10 IOUT [mA] 5.0 4.9 4.8 100 4.7 0.01 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 Condition 6 S-8353A50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 VOUT [V] [%] 80 60 VIN = 2 V VIN = 3 V VIN = 4 V 40 20 0.01 0.1 1 10 IOUT [mA] 100 5.0 4.9 4.8 4.7 0.01 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 Condition 7 S-8353A50MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 5.2 5.1 VOUT [V] [%] 80 60 VIN = 2 V VIN = 3 V VIN = 4 V 40 20 0.01 0.1 1 10 IOUT [mA] 5.0 4.9 4.8 100 4.7 0.01 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 100 1000 Condition 8 S-8353A33MC (a) Output current (IOUT) vs. Efficiency () 100 (b) Output current (IOUT) vs. Output voltage (VOUT) 3.5 3.4 VOUT [V] [%] 80 60 VIN = 0.9 V VIN = 1.8 V VIN = 2.7 V 40 20 0.01 0.1 1 10 IOUT [mA] 100 3.3 3.2 3.1 1000 3.0 0.01 Seiko Instruments Inc. VIN = 0.9 V VIN = 1.8 V VIN = 2.7 V 0.1 1 10 IOUT [mA] 100 1000 35 STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_00 S-8353/8354 Series 3. Output Current (IOUT) vs. Ripple Voltage (Vr) Characteristics The following shows the actual Output current (IOUT) vs. Ripple voltage (Vr) characteristics and (b) Output current (IOUT) vs. Output voltage (VOUT) characteristics under the conditions of No. 1 to 8 in Table 20. Condition 1 S-8353H50MC Vr [mV] 80 60 100 VIN = 2 V VIN = 3 V VIN = 4 V 80 Vr [mV] 100 Condition 2 S-8353H50MC 40 60 40 20 20 0 0.01 0.1 1 10 IOUT [mA] 100 120 200 VIN = 2 V VIN = 3 V VIN = 4 V 160 80 120 0.1 1 10 [mA] 100 200 VIN = 2 V VIN = 3 V VIN = 4 V 160 Vr [mV] Vr [mV] 100 1000 100 1000 100 1000 VIN = 2 V VIN = 3 V VIN = 4 V 0.1 1 10 IOUT [mA] 120 VIN = 2 V VIN = 3 V VIN = 4 V 80 40 0.1 1 10 IOUT [mA] 100 0 0.01 1000 0.1 1 10 IOUT [mA] Condition 8 S-8353A33MC 200 VIN = 2 V VIN = 3 V VIN = 4 V 160 Vr [mV] Vr [mV] 1000 Condition 6 S-8353A50MC Condition 7 S-8353A50MC 36 0 0.01 1000 Condition 5 S-8354A50MC 280 240 200 160 120 80 40 0 0.01 100 40 IOUT 280 240 200 160 120 80 40 0 0.01 1 10 IOUT [mA] 80 40 0 0.01 0.1 Condition 4 S-8354A50MC Vr [mV] Vr [mV] 160 0 0.01 1000 Condition 3 S-8353H50MC 200 VIN = 2 V VIN = 3 V VIN = 4 V 120 VIN = 2 V VIN = 3 V VIN = 4 V 80 40 0.1 1 10 IOUT [mA] 100 1000 Seiko Instruments Inc. 0 0.01 0.1 1 10 IOUT [mA] 2.90.2 1 2 3 0.16 +0.1 -0.05 0.950.1 1.90.2 0.40.1 No. MP003-A-P-SD-1.1 TITLE SOT233-A-PKG Dimensions MP003-A-P-SD-1.1 No. SCALE UNIT mm Seiko Instruments Inc. +0.1 1.5 -0.05 4.00.1 2.00.1 1.10.1 0.250.05 1.60.1 4.00.1 2.850.2 3 2 1 Feed direction No. MP003-A-C-SD-1.1 TITLE No. SOT233-A-Carrier Tape MP003-A-C-SD-1.1 SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.00.3 Enlarged drawing in the central part o130.2 (60) (60) No. MP003-A-R-SD-1.1 TITLE SOT233-A-Reel No. MP003-A-R-SD-1.1 SCALE UNIT QTY. 3,000 mm Seiko Instruments Inc. 2.90.2 1 2 3 0.16 +0.1 -0.06 0.950.1 1.90.2 0.40.1 No. MP003-C-P-SD-1.0 TITLE SOT233-C-PKG Dimensions No. MP003-C-P-SD-1.0 SCALE UNIT mm Seiko Instruments Inc. +0.1 o1.5 -0 4.00.1 2.00.1 +0.25 o1.0 -0 0.230.1 4.00.1 1.40.2 3.20.2 1 2 3 Feed direction No. MP003-C-C-SD-2.0 TITLE SOT233-C-Carrier Tape No. MP003-C-C-SD-2.0 SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.20.5 Enlarged drawing in the central part o130.2 No. MP003-Z-R-SD-1.0 SOT233-C-Reel TITLE MP003-Z-R-SD-1.0 No. SCALE UNIT QTY. mm Seiko Instruments Inc. 3,000 2.90.2 1.90.2 4 5 1 2 +0.1 0.16 -0.06 3 0.950.1 0.40.1 No. MP005-A-P-SD-1.2 TITLE No. SOT235-A-PKG Dimensions MP005-A-P-SD-1.2 SCALE UNIT mm Seiko Instruments Inc. 4.00.1(10 pitches:40.00.2) +0.1 o1.5 -0 2.00.05 +0.2 o1.0 -0 0.250.1 4.00.1 1.40.2 3.20.2 3 2 1 4 5 Feed direction No. MP005-A-C-SD-2.1 TITLE SOT235-A-Carrier Tape No. MP005-A-C-SD-2.1 SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.00.3 Enlarged drawing in the central part o130.2 (60) (60) No. MP005-A-R-SD-1.1 SOT235-A-Reel TITLE No. MP005-A-R-SD-1.1 SCALE QTY. UNIT mm Seiko Instruments Inc. 3,000 4.50.1 1.50.1 1.60.2 1 2 3 1.50.1 1.50.1 0.40.05 45 0.40.1 0.40.1 0.450.1 No. UP003-A-P-SD-1.1 TITLE SOT893-A-PKG Dimensions No. UP003-A-P-SD-1.1 SCALE UNIT mm Seiko Instruments Inc. +0.1 o1.5 -0 4.00.1(10 pitches : 40.00.2) 2.00.05 o1.5 +0.1 -0 5 max. 0.30.05 8.00.1 2.00.1 4.750.1 Feed direction No. UP003-A-C-SD-1.1 TITLE SOT893-A-Carrier Tape No. UP003-A-C-SD-1.1 SCALE UNIT mm Seiko Instruments Inc. 16.5max. 13.00.3 Enlarged drawing in the central part (60) (60) No. UP003-A-R-SD-1.1 SOT893-A-Reel TITLE No. UP003-A-R-SD-1.1 SCALE UNIT QTY. mm Seiko Instruments Inc. 1,000 www.sii-ic.com * * * * * * * The information described herein is subject to change without notice. Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. When the products described herein are regulated products subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. The products described herein are not designed to be radiation-proof. Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.