MCP1640C-I(2015) View Datasheet(PDF) - Microchip Technology

Part Name

Description

MFG CO.

MCP1640C-I
(Rev.:2015)

0.65V Start-Up Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option

Microchip Technology 

MCP1640/B/C/D

6.0 TYPICAL APPLICATION CIRCUITS

Manganese Lithium

Dioxide Button Cell

+

2.0V to 3.2V

-

CIN

4.7 µF

From PIC® MCU I/O

L1

4.7 µH

SW VOUT

VIN

EN

VFB

GND

VOUT

5.0V @ 5 mA

976 k

309 k

COUT

10 µF

Note:

For applications that can operate directly from the battery input voltage during Sleep mode and

require a higher voltage during Normal Run mode, the MCP1640C device provides Input to

Output Bypass when disabled. The PIC® microcontroller is powered by the output of the

MCP1640C. One of its I/O pins is used to enable and disable the MCP1640C. While operating

in Sleep mode, the MCP1640C input quiescent current is typically less than 1 µA.

FIGURE 6-1:

Manganese Lithium Coin Cell Application Using Bypass Mode.

VIN

3.3V To 4.2V

+

CIN

10 µF

-

L1

10 µH

SW VOUTS

VIN

VOUTP

EN

VFB

PGND SGND

VOUT

5.0V @ 350 mA

976 k

309 k

COUT

10 µF

FIGURE 6-2:

USB On-The-Go Powered by Li-Ion.

 2010-2015 Microchip Technology Inc.

DS20002234D-page 19

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