MCP1601-I データシートの表示（PDF） - Microchip Technology

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MCP1601-I

500 mA Synchronous BUCK Regulator

Microchip Technology 

MCP1601

Typical Application

Input

Voltage

2.7V-4.2V

CIN

10 µF

Typical Application (2.7V to 4.2V)

MCP1601

1 VIN

2 SHDN

LX 8

PGND 7

L Range

10 µH to 22 µH

10 µH

3 FB

4 AGND

VOUT 6

SYNC/ 5

PWM

C1

47 pF

R1

250 k

(for 1.8V)

VOUT Range

1.2V to 3.3V

IOUT = 0 mA to 400 mA

COUT

10 µF

COUT Range

10 µF to 47 µF

R2

200 k

Functional Block Diagram

VIN

SHDN

FB

UVLO

Internal

Circuit

Enable

Enable Out

10 pF

800 k 12 pF

RCOMP CCOMP

3 M

0.8V

-

EA

+

AGND

Feedforward Oscillator

K*VIN

Duty

Clamp

Cycle

Soft Start

Duty

+

Cycle

-

Clamp

10% - 90%

SQW

AGND

AGND

ISENSEP

VREF -

PFM Mode

PFM Comparator Timing

+

VREF -

ISENSEN

VREF -

Internal

Band Gap

Reference

Buffered 0.8V Output

+ VREF

-

PWM Latch

R

ISENSEP

OUT

S

Inset

Timing

ISENSEN

VOUT

LX

PGND

PGND

SYNC/PWM

DS21762B-page 2

 2003-2013 Microchip Technology Inc.

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