MCP1257-IMF Microchip Technology, MCP1257-IMF Datasheet
MCP1257-IMF
Specifications of MCP1257-IMF
Related parts for MCP1257-IMF
MCP1257-IMF Summary of contents
Page 1
... The MCP1256, MCP1257, MCP1258 and MCP1259 provide high efficiency by automatically switching between 1.5x and 2x boost operation. In addition, at light output loads, the MCP1256 and MCP1257 can be placed in a SLEEP mode, lowering the quiescent current while maintaining the regulated output voltage. Alternatively, the MCP1258 and MCP1259 provide a BYPASS feature connecting the input voltage to the output ...
Page 2
... Transfer L BYPASS — — Legend Logic Low Logic High DS21989A-page 2 10 SHDN LBO 1 9 GND SLEEP OUT 10 SHDN LBO 1 9 GND BYPASS OUT Gate Drives S1 S5 S5, S1,S3, S2(CE — MCP1257 10 SHDN 9 GND MCP1259 10 SHDN 9 GND OUT © 2006 Microchip Technology Inc. ...
Page 3
... Threshold Thermal Shutdown T J(HYS) Hysteresis © 2006 Microchip Technology Inc. MCP1256/7/8/9 † Notice: Stresses above those listed under “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 listings of this specification is not implied ...
Page 4
... Electrical Specifications: Unless otherwise indicated, all limits apply for μ mA -40°C to +125°C. Typical values are OUT J Parameters Sym MCP1256 and MCP1257 Devices SLEEP Mode Input - SLEEP SLEEP Input Voltage Low V IL(SLEEP) SLEEP Input Voltage High V IH(SLEEP) SLEEP Input Leakage I LK(SLEEP) Current ...
Page 5
... Internal Oscillator Frequency F OSC Output Voltage Ripple, V RIP Normal Operation V Wake-up Time From T OUT WKUP Shutdown MCP1256 and MCP1257 Output Voltage Ripple, V RIP SLEEP Mode MCP1258 and MCP1259 V Wake-up Time From T OUT WKUP BYPASS TEMPERATURE SPECIFICATIONS Electrical Specifications: Unless otherwise indicated, all limits apply for V ...
Page 6
... Mode Transition 2.1 2.4 2.7 3.0 3.3 Input Voltage (V) Efficiency ( ) vs. Supply OUT Mode Transition 2.1 2.4 2.7 3.0 3.3 Input Voltage (V) Efficiency ( ) vs. Supply I = 100 mA OUT Mode Transition 2.1 2.4 2.7 3.0 3.3 Input Voltage (V) Efficiency ( ) vs. Supply © 2006 Microchip Technology Inc. ...
Page 7
... Input Voltage ( 1.8 1.7 1.6 1.5 1.4 1.3 1 Output Current (mA) FIGURE 2-9: Quiescent Supply Current (I ) vs. Output Current ( Normal Mode. Q OUT © 2006 Microchip Technology Inc μ μF, I OUT 1 2 OUT 2.4 2 3. 2.1V IN 1.8 1.6 1.4 1.2 0 110 130 ) vs ...
Page 8
... FIGURE 2-18: Time - Normal 1.5x Mode mA, and T = +25° 2. 100 mA OUT Time (μs) Output Voltage Ripple vs 3. OUT Time (μs) Output Voltage Ripple vs 3. OUT Time (μs) Output Voltage Ripple vs. © 2006 Microchip Technology Inc. ...
Page 9
... FIGURE 2-20: Output Voltage Ripple vs. Time - SLEEP Mode. 0.20 0.15 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0.20 Time (μs) FIGURE 2-21: Output Voltage Ripple vs. Time - SLEEP Mode. © 2006 Microchip Technology Inc μ μF, I OUT 1 2 OUT 0. 3. 100 mA OUT ...
Page 10
... FIGURE 2-28: = +25°C. A 0.20 0.10 0.00 -0. OUT -0.20 -0.30 -0.40 -0.50 -0.60 Time (μs) Line Transient Response. 0.20 0.10 0.00 -0. 100 mA OUT -0.20 -0.30 -0.40 -0.50 -0.60 Time (μs) Line Transient Response. © 2006 Microchip Technology Inc. ...
Page 11
... Function Power-Good Indication Open-Drain Output Pin: MCP1256 and MCP1258 Low-Battery Indication Open-Drain Output Pin: MCP1257 and MCP1259 Active Low SLEEP Mode Input Pin: MCP1256 and MCP1257 Active Low BYPASS Mode Input Pin: MCP1258 and MCP1259 Flying Capacitor Negative Pin Flying Capacitor Positive Pin Regulated 3 ...
Page 12
... BYPASS connects the input supply voltage to the output. All remaining functions of the device are shutdown. BYPASS mode can substantially increase battery run- time in portable applications OUT OUT OUT = ---------------------------------------- - = --------------------- - V 1 1.5 IN OUT OUT OUT OUT = ------------------------------------ = ----------------- - OUT IN © 2006 Microchip Technology Inc. ...
Page 13
... SHDN is low or when BYPASS is low (MCP1258). 4.7 Low-Battery Output (LBO) For the MCP1257/9 devices, the LBO output is an open-drain output that sinks current when the input voltage falls below a preset threshold. If the input volt- age falls below the preset threshold for less than 200 μ ...
Page 14
... Typical Application with Low-Battery Indication FIGURE 6-1: Typical Application Circuits. DS21989A-page 14 MCP1256 OUT SHDN PGOOD μ SLEEP GND 9 MCP1259 OUT SHDN LBO μ BYPASS GND 9 OUTPUT 3.3V C OUT 10 μF Power-Good Indication OUTPUT 3.3V C OUT 10 μF Low-Battery Indication © 2006 Microchip Technology Inc. ...
Page 15
... 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. © 2006 Microchip Technology Inc. MCP1256/7/8/9 Example ...
Page 16
... MIN NOM MAX 10 0.50 BSC 0.80 0.90 1.00 0.00 0.02 0.05 0.20 REF. 2.85 3.00 3.15 2.08 2.39 2.45 2.85 3.00 3.15 1.30 1.65 1.70 0.18 0.25 0.30 0.30 0.40 0.50 0.20 — — Revised 09-12-05 © 2006 Microchip Technology Inc. ...
Page 17
... Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" (0.254 mm) per side. BSC: Basic Dimension. Theoretically exact value shown without tolerances. See ASME Y14.5M REF: Reference Dime n sion, usually witho ut tolerance, for information purposes only. See ASME Y14.5M JEDEC Equivalent: MO-187 BA Drawing No. C04-021 © 2006 Microchip Technology Inc ...
Page 18
... MCP1256/7/8/9 NOTES: DS21989A-page 18 © 2006 Microchip Technology Inc. ...
Page 19
... APPENDIX A: REVISION HISTORY Revision A (March 2006) • Original Release of this Document. © 2006 Microchip Technology Inc. MCP1256/7/8/9 DS21989A-page 19 ...
Page 20
... MCP1256/7/8/9 NOTES: DS21989A-page 20 © 2006 Microchip Technology Inc. ...
Page 21
... E-Temp, MSOP package d) MCP1256T-EUN: Tape and Reel, E-Temp, MSOP package a) MCP1257-EMF: E-Temp, DFN package b) MCP1257T-EMF: Tape and Reel, E-Temp, DFN package c) MCP1257-EUN: E-Temp, MSOP package d) MCP1257T-EUN: Tape and Reel, E-Temp, MSOP package a) MCP1258-EMF: E-Temp, DFN package b) MCP1258T-EMF: Tape and Reel, E-Temp, DFN package ...
Page 22
... MCP1256/7/8/9 NOTES: DS21989A-page 22 © 2006 Microchip Technology Inc. ...
Page 23
... PowerMate, PowerTool, Real ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and Zena are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
Page 24
... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2006 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-399 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...