MCP16251_16 datasheet(20/32 Pages) MICROCHIP

Part #	MCP16251

Description	Low Quiescent Current, PFM/PWM Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option

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Manufacturer	MICROCHIP [Microchip Technology]

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20 / 32 page

MCP16251/2

DS20005173B-page 20

 2013 - 2016 Microchip Technology Inc.

FIGURE 6-3:

Application showing a PIC® MCU attached to the MCP16251 to help optimize battery

life, and monitor the battery and output voltages.

VIN

GND

VFB

SW

VOUT

3.3V

COUT

10 µF

CIN

4.7 µF

L

4.7 µH

VOUT

1.3 M



510 k



EN

VBATT

Q1

NDS7002

1M



VDD

240 k



GP1

GP2

+

-

1k



1µF

ON / OFF

VSS

GP4

GP3/MCLR

220 k



Sensing

VOUT Sensing

Drive EN

MCU Bias from VOUT

Weak Up

PIC12F617

MCP16251

NDS332

Q2

Load Switch

OUT

Drive Load Switch

GP0

Note:

Application example for a simple low IQ one-cell boost converter attached to a PIC

® MCU to monitor

battery and output converter voltages and drive a load switch. When battery is connected, EN is pulled

high by a 1 M

 resistor and the converter starts regulating V

OUT, biasing the PIC MCU. The push button

is used to switch on and off the load switch and put the PIC MCU in Deep Sleep mode. Battery energy

is saved during the time when no power is needed for the load by pulsing the EN pin with low frequency

to keep the output in a 2.3-to-3.3V range for the VDD pin of the PIC MCU. A detailed description of this

application can be found in the “MCP1640 Single Quadruple-A Battery Boost Converter Reference

Design”, (DS51922) and in application note AN1337, “Optimizing Battery Life in DC Boost Converters

Using MCP1640”, (DS01337).

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MCP16251 Datasheet(PDF) 20 Page - Microchip Technology

MCP16251 Datasheet(HTML) 20 Page - Microchip Technology

Similar Part No. - MCP16251_16

Similar Description - MCP16251_16

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