AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Features * * * * * General Description AP1086 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1.5A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. AP1086 is also well suited for other applications such as VGA cards. AP1086 is guaranteed to have <1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25V to 5.0V with 4.7 to 12V input supply by different output voltage. 3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V,3.3V, 5.0V. 1.4V Maximum Dropout at Full Load Current. Fast Transient Response. Built-in Thermal Shutdown. Output Current Limiting. Ordering Information AP1086 X Low Dropout Regulator X X X Package Vout Lead Free D : TO252-3L K : TO263-3L T : TO220-3L Blank : Adj 15 = 1.5V 18 = 1.8V 25 = 2.5V 33 = 3.3V 50 = 5.0V Packing Blank : Normal Blank : Tube L : Lead Free Package A : Taping Typical Application Adjustable Regulator 5V to 3.3V Fixed Mode Regulator 5V 5V C1 100uF C1 100uF Vin Vout GND Vin 3.3V/1.5A VOUT=Vref x (1+R2/R1) Vout C2 100uF Adj Tab is Vout 2.5V/1.5A R1 121 R2 121 C2 100uF Tab is Vout This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.1.0 May. 14, 2004 1/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Block Diagram Vin 3 2 Vout 1 Adj (GND) + + 1.25V + CURRENT LIMIT + THERMAL SHUTDOWN Functional Description make the regulator stable. For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient response. Introduction The AP1086 adjustable or fixed-mode Low Dropout(LDO) regulator is a 3 terminal device which can easily be programmed by internal mask change to any voltages within the range of 1.25 to 5V. The AP1086 only needs 1.4V differential between Vin and Vout to maintain output regulation. In addition, the output voltage tolerances are also extremely tight and they include the transient response as part of the specification. For example, Intel VRE specification calls for a total of +/- 100mV including initial tolerance, load regulation and 0 to 1.5A load step. The AP1086 is specifically designed to meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with the need for fewer output capacitors. Thermal Design The AP1086 incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the maximum allowable junction temperature. Although this device can operate with junction temperatures in the range of 150oC, it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the junction temperature is kept below the temperature. Layout Consideration The output capacitors must be located as close to the Vout terminal of the device as possible. It is recommended to use a section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any high frequency oscillation that may result due to excessive trace inductance. Load Regulation Since the AP1086 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode. Stability The AP1086 requires the use of an output capacitor as part of the frequency compensation in order to Anachip Corp. www.anachip.com.tw Rev.1.0 May. 14, 2004 2/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Connection Diagram 3 PIN TO263 FRONT VIEW 2 Vout FRONT VIEW FRONT VIEW 2 Adj (GND) 1 3 PIN TO220 3 Vin 3 3 PIN TO252 1 Tab is Vout Vin Vout 3 Vin 2 Vout 1 Adj (GND) Adj (GND) Tab is Vout Tab is Vout Pin Descriptions NAME I/O Adj (GND) Vout Vin O I PIN # FUNCTION 1 Adjustable (Ground only for fixed mode) 2 The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. 3 The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.4V higher than Vout in order for the device to regulate properly. Absolute Maximum Ratings Symbol Parameter Vin DC Supply Voltage PD Power Dissipation TST Storage Temperature TOP Operating Junction Temperature Range Rating Unit -0.3 to 12 V Internally Limited Anachip Corp. www.anachip.com.tw -65 to +150 oC 0 to +150 oC Rev.1.0 May. 14, 2004 3/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Electrical Characteristics PARAMETER Reference Voltage (Under Operating Conditions) CONDITIONS MIN TYP MAX UNIT AP1086-Adj TJ=25oC,(VIN-VOUT)=1.5V,IO=10mA 1.225 1.250 1.275 V AP1086-1.5 IOUT = 10mA, TJ = 25 C, 3VVIN12V 1.470 1.500 1.530 V o o Output Voltage AP1086-1.8 IOUT = 10mA, TJ = 25 C, 3.3VVIN 12V 1.764 1.800 1.836 V AP1086-2.5 IOUT = 10mA, TJ = 25oC, 4VVIN12V 2.450 2.500 2.550 V 3.235 3.300 3.365 V 4.900 5.000 5.100 V - - 0.2 % - - 1 % - 12 15 mV - 15 18 mV - 20 25 mV - 26 33 mV - 40 50 mV - 1.3 1.4 V 1. 6 - - A - 5 10 mA - 0.008 0.04 %/W - 60 70 dB - 0.5 - % o AP1086-3.3 AP1086-5.0 Line Regulation AP1086-XXX IOUT = 10mA, TJ = 25 C, 4.8VVIN 12V IOUT = 10mA, TJ = 25oC, 6.5VVIN 12V IO=10mA, VOUT+1.5V<VIN<12V o AP1086-Adj AP1086-1.5 AP1086-1.8 Load Regulation AP1086-2.5 AP1086-3.3 AP1086-5.0 Dropout Voltage (VIN-VOUT) VIN=3.3V, 0mA<Io<1.5A, TJ=25 C (Note 1, 2) o VIN=3V, 0mA<Io<1.5A, TJ=25 C (Note 1, 2) o VIN=3.3V, 0mA<Io<1.5A, TJ=25 C (Note 1, 2) VIN=4V, 0mA<Io<1.5A, TJ=25oC (Note 1, 2) VIN = 5V, 0IOUT1.5A, TJ=25oC , o TJ=25 C (Note 1.2) o VIN = 8V, 0IOUT1.5A, TJ=25 C , TJ=25oC (Note 1.2) AP1086-Adj/-2.5 /-3.3/-3.6/-5.0 AP1086-Adj/-2.5 /-3.3/-3.6/-5.0 (VIN-VOUT) = 5V Minimum Load Current AP1086-XXX 0 CTj125 C Thermal Regulation TA=25, 30ms pulse Current Limit Ripple Rejection IOUT = 1.5A, VOUT=1%VOUT o o F=120Hz,COUT=25uF Tantalum, IOUT=1.5A AP1086-XXX VIN=VOUT+3V Temperature Stability IO=10mA Thermal Resistance Junction-to-Ambient Thermal Resistance Junction-to-Case TO-252 TO-263 TO-252: Control Circuitry/Power Transistor TO-263: Control Circuitry/Power Transistor - 101 91 15 10 - O C/W - O C/W Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18" from the package. Note 2:Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note 3:Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. Anachip Corp. www.anachip.com.tw Rev.1.0 May. 14, 2004 4/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Typical Performance Characteristics 0.20 2. 0 Output Voltage Deviation (%) 1. 8 1. 6 Dropout Voltage (V) 1. 4 1. 2 0 I load=1.5A -0.20 Tj = 25 oC 1. 0 -0.40 0. 8 Tj = 125 oC 0. 6 -0.80 0. 4 0. 2 0 0 0.25 0.5 0.75 Output Current (A) 1.0 1.25 -1 1.5 -25 Dropout Voltage vs Output Current 0 25 50 Temperature ( oC) 75 100 125 Load Regulation vs Temperature 2 1 0.8 1 0. 5 0 -0.5 -1 -1.5 -2 -50 -25 0 25 50 Temperature ( oC) 75 100 125 150 Output Voltage Deviation (%) Output Voltage Change (%) 1.5 0.6 0.4 0.2 0 2 4 7.5 Load Current (A) Output Voltage Deviation (mV) Output Voltage Deviation (mV) Input Voltage (V) Percent Change in Output Voltage vs Temperature Cin=1uF Cout=10uF Tantalum 6.5 5.5 40 20 0 -20 -40 0 20 40 60 80 100 120 140 160 180 200 TIME (us) Line Transient Response 6 8 10 Input Voltage (V) 12 Line Regulation 30 Cin=1uF Cout=10uF Tantalum Preload=100mA 20 10 0 -10 -20 2 1 0 -1 0 10 20 30 40 50 TIME (us) 60 70 80 90 100 Load Transient Response Anachip Corp. www.anachip.com.tw Rev.1.0 May. 14, 2004 5/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Marking Information ( Top View) Logo Part Number 1086 for ADJ 86-VV : 15 for 1.5V 18 for 1.8V 25 for 2.5V 33 for 3.3V 50 for 5V AC 86-VV YYWWX X Blank: normal L: Lead Free Package YY : Year WW: Nth week X : Internal code ( Optional) (TO252-3L) ( Top View) Logo Part Number VV : 15 for 1.5V 18 for 1.8V 25 for 2.5V 33 for 3.3V 50 for 5V Blank for ADJ AC 1086-VV YYWWX X Blank: normal L: Lead Free Package YY : Year WW: Nth week X : Internal code ( Optional) (TO220-3L / TO263-3L) Anachip Corp. www.anachip.com.tw Rev.1.0 May. 14, 2004 6/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Package Dimension (1) TO263-3L A L2 E L D C2 L3 C e Symbol A b b2 C C2 D E e L L1 L2 L3 L1 b b2 Dimensions In Millimeters Min. Nom. Max. 4.06 4.45 4.83 0.51 0.75 0.99 1.14 1.27 1.40 0.38 TYP. 1.14 1.27 1.40 8.65 9.15 9.65 9.65 9.97 10.29 2.54 BSC. 14.61 15.24 15.88 2.28 2.54 2.80 1.30 2.92 1.27 1.52 1.78 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.160 0.175 0.190 0.020 0.030 0.039 0.045 0.050 0.055 0.015 TYP. 0.045 0.050 0.055 0.341 0.380 0.575 0.360 0.393 0.100 BSC. 0.600 0.380 0.405 0.625 0.090 0.050 0.100 0.051 0.060 0.110 0.115 0.070 Rev.1.0 May. 14, 2004 7/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator (2) TO252-3L A L2 D SEATING PLANE C1 H E b2 L1 SEE NOTE2 b L e A1 e1 Notes: 1. 2. Symbol A A1 b b2 C C1 D E e e1 H L L1 L2 C JEDEC Outline: TO-252 AB Mils suggested for positive contact at mounting. Dimensions In Millimeters Min. Nom. Max. 2.18 2.29 2.39 1.02 1.15 1.27 0.61 TYP. 5.20 5.35 5.50 0.46 0.52 0.58 0.46 0.52 0.58 5.33 5.57 5.80 6.35 6.58 6.80 2.25 BSC. 4.50 BSC. 9.00 9.70 10.40 0.51 0.64 0.83 1.02 1.52 1.78 2.03 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.086 0.090 0.094 0.040 0.045 0.050 0.024 TYP. 0.205 0.211 0.217 0.018 0.020 0.023 0.018 0.020 0.023 0.210 0.219 0.228 0.250 0.259 0.268 0.089 BSC. 0.177 BSC. 0.354 0.382 0.409 0.020 0.025 0.033 0.040 0.060 0.070 0.080 Rev.1.0 May. 14, 2004 8/9 AP1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator (3) TO220-3L E A F SEATING PLANE Q P L1 D H1 L b1 C b J1 e e1 Symbol A b1 b C D E e e1 F H1 J1 L L1 oP Q Dimensions In Millimeters Min. Nom. Max. 3.55 4.20 4.85 1.14 1.46 1.78 0.51 0.83 1.14 0.31 0.72 1.14 14.20 15.35 16.50 9.70 10.20 10.70 2.29 2.54 2.79 4.83 5.08 5.33 0.51 0.95 1.40 5.84 6.35 6.86 2.03 2.48 2.92 12.72 13.72 14.72 3.66 5.00 6.35 3.53 3.81 4.09 2.54 2.98 3.43 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.140 0.165 0.191 0.045 0.057 0.070 0.020 0.033 0.045 0.012 0.028 0.045 0.559 0.604 0.650 0.382 0.402 0.421 0.090 0.100 0.110 0.190 0.200 0.210 0.020 0.037 0.055 0.230 0.250 0.270 0.080 0.098 0.115 0.501 0.540 0.580 0.144 0.197 0.250 0.139 0.150 0.161 0.100 0.117 0.135 Rev.1.0 May. 14, 2004 9/9