MIC2288 1A, 1.2 MHz PWM Boost Converter in Thin SOT23 and DFN Packages Features General Description * * * * * * * * * * * * * * The MIC2288 is a 1.2 MHz PWM, DC/DC boost switching regulator available in low-profile Thin SOT23 and 2 mm x 2 mm DFN package options. High power density is achieved with the MIC2288's internal 34V/1A switch, allowing it to power large loads in a tiny footprint. 2.5V to 10V Input Voltage Range Output Voltage Adjustable to 34V Over 1A Switch Current 1.2 MHz PWM Operation Stable with Ceramic Capacitors <1% Line and Load Regulation Low Output Voltage Ripple <1 A Shutdown Current Undervoltage Lockout Output Overvoltage Protection (MIC2288YML) Overtemperature Shutdown Thin SOT23-5 Package Option 2 mm x 2 mm leadless DFN-8 Package Option -40C to +125C Junction Temperature Range Applications * * * * * * Organic EL Power Supply TFT-LCD Bias Supply 12V Supply for DSL Applications Multi-Output DC/DC Converters Positive and Negative Output Regulators SEPIC Converters The MIC2288 implements a constant frequency, 1.2 MHz PWM, current mode control scheme with internal compensation that offers excellent transient response and output regulation performance. The high frequency operation saves board space by allowing small, low-profile, external components. The fixed frequency PWM topology also reduces spurious switching noise and ripple to the input power source. The MIC2288 is available in a low-profile Thin SOT23-5 package and a 2 mm x 2 mm DFN-8 leadless package. The DFN package option has an output overvoltage protection feature. The MIC2288 has a junction temperature range of -40C to +125C. Package Types MIC2288 DFN-8 (ML) (Top View) MIC2288 Thin SOT23-5 (D5) (Top View) OVP 1 8 PGND VIN 2 7 SW EN 3 6 FB AGND 4 5 NC EP 2018 Microchip Technology Inc. FB GND SW 1 2 3 4 EN 5 VIN DS20006034B-page 1 MIC2288 Typical Application Circuit L1 10H VIN VOUT 15V MIC2288YD5 5 4 1-Cell Li Ion C1 2.2F SW VIN FB EN 1 R1 3 R2 GND C2 10F 2 Functional Block Diagram VIN FB OVP* EN OVP* SW PWM Generator gm VREF 1.24V 1.2MHz Oscillator Ramp Generator CA GND *OVP available on DFN package option only. DS20006034B-page 2 2018 Microchip Technology Inc. MIC2288 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings Supply Voltage (VIN) .................................................................................................................................................+12V Switch Voltage (VSW) ................................................................................................................................. -0.3V to +34V Enable Pin Voltage (VEN) ...............................................................................................................................-0.3V to VIN FB Voltage (VFB) ......................................................................................................................................................+6.0V Switch Current (ISW) .....................................................................................................................................................2A ESD Rating (Note 1) ................................................................................................................................................ +2 kV Operating Ratings Supply Voltage (VIN) .................................................................................................................................. +2.5V to +10V Notice: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. Notice: The device is not guaranteed to function outside its operating ratings. Note 1: Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 k in series with 100 pF. 2018 Microchip Technology Inc. DS20006034B-page 3 MIC2288 ELECTRICAL CHARACTERISTICS Electrical Characteristics: TA = +25C, VIN = VEN = 3.6V, VOUT = 10V, IOUT = 20 mA, unless otherwise noted. Bold values indicate -40C TJ 125C. Note 1 Parameter Sym. Min. Typ. Max. Units Supply Voltage Range VIN 2.5 -- 10 V -- Undervoltage Lockout VUVLO 1.8 2.1 2.4 V -- Quiescent Current IVIN -- 2.8 5 mA VFB = 2V, not switching Shutdown Current ISD -- 0.1 1 A VEN = 0V, Note 2 Feedback Voltage VFB 1.227 1.24 1.252 1.215 -- 1.265 Feedback Input Current IFB -- -450 -- nA VFB = 1.24V Line Regulation -- -- 0.1 1 % 3V VIN 5V Load Regulation -- -- 0.2 -- % 5 mA IOUT 40 mA Maximum Duty Cycle DMAX 85 90 -- % -- Switch Current Limit ISW -- 1.2 -- A -- Switch Saturation Voltage VSW -- 550 -- mV ISW = 1A Switch Leakage Current ISW -- 0.01 5 A VEN = 0V, VSW = 10V Enable Threshold VEN 1.5 -- -- -- -- 0.4 Enable Pin Current IEN -- 20 40 A Oscillator Frequency fSW 1.05 1.2 1.35 MHz Output Overvoltage Protection VOVP 30 32 34 V Overtemperature Threshold Shutdown TJ -- 150 -- -- 10 -- Note 1: 2: V V C Conditions 1% 2%, overtemperature Turn on Turn off VEN = 10V -- DFN package option only -- Hysteresis Specification for packaged product only. ISD = IVIN. DS20006034B-page 4 2018 Microchip Technology Inc. MIC2288 TEMPERATURE SPECIFICATIONS Parameters Sym. Min. Typ. Max. Units Conditions Junction Operating Temperature TJ -40 -- +125 C -- Storage Temperature Range TS -65 -- +150 C -- Thermal Resistance, 2x2 DFN 8-Ld JA -- 93 -- C/W -- Thermal Resistance, TSOT23-5 JA -- 256 -- C/W -- Temperature Ranges Package Thermal Resistances Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +125C rating. Sustained junction temperatures above +125C can impact the device reliability. 2018 Microchip Technology Inc. DS20006034B-page 5 MIC2288 2.0 TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Note: 91 1.8 89 1.6 V IN = 4.2V 1.4 85 83 V IN = 3.6V 81 79 V IN = 3.3V CURRENT LIMIT (A) EFFICIENCY (%) 87 77 75 1 0.8 0.6 0.4 0.2 0 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) FIGURE 2-1: Efficiency at VOUT = 12V. 2.5 FIGURE 2-4: Voltage. 12.2 1.4 12.15 1.2 12.05 12 11.95 11.9 V 11.85 11.8 0 25 FIGURE 2-2: IN = 3.6V Load Regulation. FEEDBACK VOLTAGE (V) 10 Current-Limit vs. Supply 1.0 0.8 0.6 0.4 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) FIGURE 2-5: Temperature. Current-Limit vs. 300 1.26 1.24 1.22 1.20 1.18 1.16 1.14 1.12 1.10 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) DS20006034B-page 6 4 5.5 7 8.5 SUPPLY VOLTAGE (V) 0.2 50 75 100 125 150 LOAD (mA) 1.30 1.28 FIGURE 2-3: Temperature. CURRENT LIMIT (A) 12.1 Feedback Voltage vs. SWITCH SATURATION VOLTAGE (mV) OUTPUT VOLTAGE (V) 1.2 250 200 150 100 50 I S W = 500mA 0 2.5 FIGURE 2-6: Voltage. 4 5.5 7 8.5 SUPPLY VOLTAGE (V) 10 Switch Saturation vs. Supply 2018 Microchip Technology Inc. MIC2288 . MAXIMUM DUTY CYCLE (%) 600 500 400 300 200 V IN = 3.6V 100 0 0 Switch Saturation vs. Switch FIGURE 2-10: Supply Voltage. 700 99 600 97 500 400 300 200 100 V IN = 3.6V I = 500mA SW 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) FIGURE 2-8: Temperature. FREQUENCY (MHz) 1000 100 98 96 94 92 90 88 86 84 82 80 2.5 MAXIMUM DUTY CYCLE (%) SWITCH SATURATION VOLTAGE (mV) FIGURE 2-7: Current. 200 400 600 800 SWITCH CURRENT (mA) Switch Saturation vs. 91 89 87 FIGURE 2-11: Temperature. 1.3 600 1.0 0.9 0.8 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) FIGURE 2-9: Frequency vs. Temperature. 2018 Microchip Technology Inc. Maximum Duty Cycle vs. 93 700 1.1 10 95 1.4 1.2 4 5.5 7 8.5 SUPPLY VOLTAGE (V) V IN = 3.6V 85 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) FEEDBACK CURRENT (nA) SWITCH SATURATION VOLTAGE (mV) 700 Maximum Duty Cycle vs. 500 400 300 200 100 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) FIGURE 2-12: Temperature. FB Pin Current vs. DS20006034B-page 7 3.6VIN 12VOUT 150mA Load OUTPUT VOLTAGE (100mV/div) AC-Coupled 10mA Time (400s/div) 4.2V 3.2V 12VOUT 150mA Load Line Transient Response. Load Transient Response. OUTPUT VOLTAGE (50mV/div) FIGURE 2-15: SWITCH SATURATION (5V/div) Enable Characteristics. INPUT VOLTAGE (2V/div) DS20006034B-page 8 3.6VIN 12VOUT COUT = 10F Time (400s/div) Time (400s/div) FIGURE 2-14: 150mA LOAD CURRENT (100mA/div) Enable Voltage OUTPUT VOLTAGE (1mV/div) AC-Coupled FIGURE 2-13: Output Voltage INDUCTOR CURRENT (500mA/div) ENABLE VOLTAGE (2V/div) OUTPUT VOLTAGE (5V/div) MIC2288 Output Voltage Inductor Current (10H) VSW 3.6VIN 12VOUT 150mA Time (400ns/div) FIGURE 2-16: Output Voltage Ripple and Switching Waveforms. 2018 Microchip Technology Inc. MIC2288 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin Number TSOT23-5 Pin Number DFN-8 Pin Name 1 7 SW 2 -- GND 3 6 FB Feedback (Input): 1.24V output voltage sense node. 4 3 EN Enable (input): Logic-high enables regulator. Logic-low shuts down regulator. Do not leave floating. 5 2 VIN Supply (Input): 2.5V to 10V input voltage. -- 1 OVP Output Overvoltage Protection (Input): Tie this pin to VOUT to clamp the output voltage to 34V maximum in fault conditions. Tie this pin to ground if OVP function is not required. -- 5 NC -- 4 AGND Analog ground. -- 8 PGND Power ground. -- EP GND 2018 Microchip Technology Inc. Description Switch Node (Input): Internal power bipolar collector. Ground (Return): Ground. No Connect: No internal connection to die. Exposed backside pad. DS20006034B-page 9 MIC2288 4.0 FUNCTIONAL DESCRIPTION The MIC2288 is a constant frequency, PWM current mode boost regulator. See the Functional Block Diagram. The MIC2288 is composed of an oscillator, slope compensation ramp generator, current amplifier, gm error amplifier, PWM generator, and a 1A bipolar output transistor. The oscillator generates a 1.2 MHz clock. The clock's two functions are to trigger the PWM generator that turns on the output transistor and to reset the slope compensation ramp generator. The current amplifier is used to measure the switch current by amplifying the voltage signal from the internal sense resistor. The output of the current amplifier is summed with the output of the slope compensation ramp generator. This summed current-loop signal is fed to one of the inputs of the PWM generator. The gm error amplifier measures the feedback voltage through the external feedback resistors and amplifies the error between the detected signal and the 1.24V reference voltage. The output of the gm error amplifier provides the voltage-loop signal that is fed to the other input of the PWM generator. When the current-loop signal exceeds the voltage-loop signal, the PWM generator turns off the bipolar output transistor. The next clock period initiates the next switching cycle, maintaining the constant frequency current-mode PWM control. DS20006034B-page 10 2018 Microchip Technology Inc. MIC2288 5.0 APPLICATION INFORMATION 5.1 DC/DC PWM Boost Conversion The MIC2288 is a constant-frequency boost converter. It operates by taking a DC input voltage and regulating a higher DC output voltage. Figure 5-1 shows a typical circuit. Boost regulation is achieved by turning on an internal switch, which draws current through the inductor (L1). When the switch turns off, the inductor's magnetic field collapses, causing the current to be discharged into the output capacitor through an external Schottky diode (D1). Voltage regulation is achieved by modulating the pulse width or pulse-width modulation (PWM). L1 10H VIN D1 VOUT 5.3 For the DFN package option, there is an overvoltage protection function. If the feedback resistors are disconnected from the circuit or the feedback pin is shorted to ground, the feedback pin will fall to ground potential. This will cause the MIC2288 to switch at full duty cycle in an attempt to maintain the feedback voltage. As a result, the output voltage will climb out of control. This may cause the switch node voltage to exceed its maximum voltage rating, possibly damaging the IC and the external components. To ensure the highest level of protection, the MIC2288 OVP pin will shut the switch off when an overvoltage condition is detected, saving the regulator and other sensitive circuitry downstream. 5.4 5.4.1 MIC2288YML SW VIN C1 2.2F OVP EN R1 FB GND R2 GND GND FIGURE 5-1: 5.2 C2 10F Typical Application Circuit. Duty Cycle Considerations Duty cycle refers to the switch on-to-off time ratio and can be calculated as follows for a boost regulator: EQUATION 5-1: V IN D = 1 - ------------V OUT The duty cycle required for voltage conversion should be less than the maximum duty cycle of 85%. Also, in light load conditions where the input voltage is close to the output voltage, the minimum duty cycle can cause pulse skipping. This is due to the energy stored in the inductor causing the output to overshoot slightly over the regulated output voltage. During the next cycle, the error amplifier detects the output as being high and skips the following pulse. This effect can be reduced by increasing the minimum load or by increasing the inductor value. Increasing the inductor value reduces peak current, which in turn reduces energy transfer in each cycle. 2018 Microchip Technology Inc. Overvoltage Protection Component Selection INDUCTOR Inductor selection is a balance between efficiency, stability, cost, size, and rated current. For most applications, 10 H is the recommended inductor value. It is usually a good balance between these considerations. Larger inductance values reduce the peak-to-peak ripple current, affecting efficiency. This has the effect of reducing both the DC losses and the transition losses. There is also a secondary effect of an inductor's DC resistance (DCR). The DCR of an inductor will be higher for more inductance in the same package size. This is due to the longer windings required for an increase in inductance. Because the majority of input current (minus the MIC2288 operating current) is passed through the inductor, higher DCR inductors will reduce efficiency. To maintain stability, increasing the inductor value will have to be associated with an increase in output capacitance. This is due to the unavoidable "right half plane zero" effect for the continuous current boost converter topology. The frequency at which the right half plane zero occurs can be calculated as follows: EQUATION 5-2: 2 V IN f RHPZ = ------------------------------------------------------V OUT L I OUT 2 The right half plane zero has the undesirable effect of increasing gain, while decreasing phase. This requires that the loop gain is rolled off before this has significant effect on the total loop response. This can be accomplished by either reducing inductance (increasing RHPZ frequency) or increasing the output capacitor value (decreasing loop gain). DS20006034B-page 11 MIC2288 5.4.2 OUTPUT CAPACITOR Output capacitor selection is also a trade-off between performance, size, and cost. Increasing output capacitance will lead to an improved transient response, but also an increase in size and cost. X5R or X7R dielectric ceramic capacitors are recommended for designs with the MIC2288. Y5V values may be used but to compensate their drift over temperature, more capacitance is required. The following table shows the recommended ceramic (X5R) output capacitor value vs. output voltage. TABLE 5-1: OUTPUT CAPACITOR SELECTION Output Voltage 5.4.3 Recommended Output Capacitance <6V 22 F <16V 10 F <34V 4.7 F DIODE SELECTION The MIC2288 requires an external diode for operation. A Schottky diode is recommended for most applications due to their lower forward voltage drop and reverse recovery time. Ensure the diode selected can deliver the peak inductor current and the maximum reverse voltage is rated greater than the output voltage. 5.4.4 INPUT CAPACITOR A minimum 1F ceramic capacitor is recommended for designing with the MIC2288. Increasing input capacitance will improve performance and greater noise immunity on the source. The input capacitor should be as close as possible to the inductor and the MIC2288, with short traces for good noise performance. 5.4.5 FEEDBACK RESISTORS The MIC2288 utilizes a feedback pin to compare the output to an internal reference. The output voltage is adjusted by selecting the appropriate feedback resistor network values. The R2 resistor value must be less than or equal to 5 k (R2 5 k).The desired output voltage can be calculated as follows: EQUATION 5-3: R1 V OUT = V REF ------- + 1 R2 Where: VREF = 1.24V DS20006034B-page 12 2018 Microchip Technology Inc. MIC2288 6.0 APPLICATION CIRCUITS L1 4.7H VIN 3V to 4.2V VOUT 5V @ 400mA D1 MIC2288YML C1 4.7F 6.3V VIN OVP FB R2 1.87k GND GND FIGURE 6-1: @ 400 mA. VOUT 12V @ 100mA D1 MIC2288YML R1 5.62k SW EN L1 10H VIN 3V to 4.2V C2 22F 6.3V VIN C1 2.2F 10V R1 42.3k SW OVP EN FB R2 5k GND GND 3.0V to 4.2V VIN to 5VOUT GND C2 10F 16V GND 3.0V to 4.2V VIN to 12VOUT FIGURE 6-3: @ 100 mA. Ref Description Part Number Vendor Ref Description Part Number Vendor C1 4.7 F, 6.3V, 0805 X5R Cer Cap 08056D475MAT AVX C1 4.7 F, 6.3V, 0805 X5R Cer Cap 08056D475MAT AVX C2 22 F, 6.3V, 0805 X5R Cer Cap 12066D226MAT AVX C2 10 F, 16V, 1206 X5R Cer Cap 1206YD106MAT AVX D1 1A, 40V Schotty Diode MBRM140T3 On Semi. D1 1A, 40V Schotty Diode MBRM140T3 On Semi. L1 4.7 H, 650 mA Inductor LQH32CN4R7M11 Murata L1 4.7 H, 650 mA Inductor LQH32CN4R7M11 Murata L1 10H VIN 3V to 4.2V VOUT 9V @ 180mA D1 MIC2288YML C1 2.2F 10V VIN SW FB GND GND FIGURE 6-2: @ 180 mA. Ref Description C1 R2 5k C2 10F 16V C1 2.2F 10V VIN R1 54.9k SW OVP EN FB R2 5k GND GND 3.0V to 4.2V VIN to 9VOUT GND FIGURE 6-4: @ 100 mA. Part Number Vendor Ref Description 2.2 F, 10V, 0805 X5R Cer Cap 08052D225KAT AVX C1 C2 10 F, 16V, 1206 X5R Cer Cap 1206YD106MAT AVX D1 1A, 40V Schotty Diode MBRM140T3 L1 10 H, 650 mA Inductor LQH43CN100K03 2018 Microchip Technology Inc. VOUT 15V @ 100mA D1 MIC2288YML R1 31.6k OVP EN L1 10H VIN 3V to 4.2V C2 10F 16V GND 3.0V to 4.2V VIN to 15VOUT Part Number Vendor 2.2 F, 10V, 0805 X5R Cer Cap 08052D225KAT AVX C2 10 F, 16V, 1206 X5R Cer Cap 1206YD106MAT AVX On Semi. D1 1A, 40V Schotty Diode MBRM140T3 On Semi. Murata L1 10 H, 650 mA Inductor LQH43CN100K03 Murata DS20006034B-page 13 MIC2288 L1 10H VIN 3V to 4.2V VOUT 24V @ 50mA D1 L1 10H VIN 5V MIC2288YML VIN C1 2.2F 10V MIC2288YML R1 18.2k SW OVP EN FB R2 1k GND GND FIGURE 6-5: @ 50 mA. Ref C2 4.7F 25V VIN C1 2.2F 10V R1 43.2k SW OVP EN FB R2 5k GND GND 3.0V to 4.2V VIN to 24VOUT Description VOUT 12V @ 250mA D1 Part Number Vendor GND FIGURE 6-7: C2 10F 16V GND 5VIN to 12VOUT @ 250 mA. Ref Description Part Number Vendor 08052D225KAT AVX C1 2.2 F, 10V, 0805 X5R Cer Cap 08052D225KAT AVX C1 2.2 F, 10V, 0805 X5R Cer Cap C2 4.7 F, 25V, 1206 X5R Cer Cap 12063D475MAT AVX C2 10 F, 16V, 1206 X5R Cer Cap 1206YD106MAT AVX D1 1A, 40V Schotty Diode MBRM140T3 On Semi. D1 1A, 40V Schotty Diode MBRM140T3 On Semi. L1 10 H, 650 mA Inductor LQH43CN100K03 Murata L1 10 H, 650 mA Inductor LQH43CN100K03 Murata L1 10H VIN 5V VOUT 9V @ 330mA D1 L1 10H VIN 5V MIC2288YML MIC2288YML VIN C1 2.2F 10V SW R1 31.6k OVP EN FB GND GND FIGURE 6-6: R2 5k C2 10F 16V VIN C1 2.2F 10V EN GND 5VIN to 9VOUT @ 330 mA. GND FIGURE 6-8: Ref Description 2.2 F, 10V, 0805 X5R Cer Cap 08052D225KAT AVX C1 C2 10 F, 16V, 1206 X5R Cer Cap 1206YD106MAT AVX D1 1A, 40V Schotty Diode MBRM140T3 L1 10 H, 650 mA Inductor LQH43CN100K03 C1 DS20006034B-page 14 R1 18.2k FB GND Vendor Description SW OVP Part Number Ref VOUT 24V @ 80mA D1 R2 1k C2 4.7F 25V GND 5VIN to 24VOUT @ 80 mA. Part Number Vendor 2.2 F, 10V, 0805 X5R Cer Cap 08052D225KAT AVX C2 4.7 F, 25V, 1206 X5R Cer Cap 12066D475MAT AVX On Semi. D1 1A, 40V Schotty Diode MBRM140T3 On Semi. Murata L1 10 H, 650 mA Inductor LQH32CN4R7M11 Murata 2018 Microchip Technology Inc. MIC2288 7.0 PACKAGING INFORMATION 7.1 Package Marking Information 5-Lead TSOT23* XXXX NNN 8-Lead TDFN* XXX NNN Legend: XX...X Y YY WW NNN e3 * Example SHAA 943 Example SJA 408 Product code or customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC(R) designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. , , Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) and/or Overbar () symbol may not be to scale. 2018 Microchip Technology Inc. DS20006034B-page 15 MIC2288 5-Lead Thin SOT23 Package Outline & Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. DS20006034B-page 16 2018 Microchip Technology Inc. MIC2288 8-Lead 2 mm x 2 mm Thin DFN Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. 2018 Microchip Technology Inc. DS20006034B-page 17 MIC2288 NOTES: DS20006034B-page 18 2018 Microchip Technology Inc. MIC2288 APPENDIX A: REVISION HISTORY Revision A (May 2018) * Converted Micrel document MIC2288 to Microchip data sheet template DS20006034A. * Minor grammatical text changes throughout. * Updated Low Output Voltage Ripple in Features. * Added clarification to EN description in Table 3-1. * Updated drawing for EN in Figure 5-1. * Updated drawings and figure captions for each entry in Section 6.0 "Application Circuits". Revision B (September 2018) * Updated values for C2 in the table beneath Figure 6-3. 2018 Microchip Technology Inc. DS20006034B-page 19 MIC2288 NOTES: DS20006034B-page 20 2018 Microchip Technology Inc. MIC2288 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. Examples: Device X XX -XX Part No. Junction Temp. Range Package Media Type 1A, 1.2 MHz PWM Boost Converter a) MIC2288YD5-TX: MIC2288, -40C to +125C Temperature Range, 5-Lead TSOT23, 3,000/Reel (Reverse T/R) b) MIC2288YD5-TR: MIC2288, -40C to +125C Temperature Range, 5-Lead TSOT, 3,000/Reel MIC2288, -40C to +125C Temperature Range, 8-Lead TDFN, 5,000/Reel Device: MIC2288: Junction Temperature Range: Y = -40C to +125C, RoHS-Compliant c) MIC2288YML-TR: Package: D5 ML = = 5-Lead Thin SOT23 8-Lead 2 mm x 2 mm TDFN Note 1: Media Type: TX TR TR = = = 3,000/Reel (Reverse T/R, TSOT only) 3,000/Reel (TSOT only) 5,000/Reel (TDFN only) 2018 Microchip Technology Inc. Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. DS20006034B-page 21 MIC2288 NOTES: DS20006034B-page 22 2018 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: * Microchip products meet the specification contained in their particular Microchip Data Sheet. * Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. * There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. * Microchip is willing to work with the customer who is concerned about the integrity of their code. * Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable." Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated. Trademarks Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BitCloud, chipKIT, chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq, Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, SAM-BA, SpyNIC, SST, SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip Technology Incorporated in the U.S.A. Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, memBrain, Mindi, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. (c) 2018, Microchip Technology Incorporated, All Rights Reserved. ISBN: 978-1-5224-3533-4 == ISO/TS 16949 == 2018 Microchip Technology Inc. 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