A4407 데이터 시트보기 (PDF) - Allegro MicroSystems

부품명

상세내역

일치하는 목록

A4407

2.2 MHz Constant On-Time Buck Regulator With Two External and Two Internal Linear Regulators

Allegro MicroSystems 

A4407

2.2 MHz Constant On-Time Buck Regulator

With Two External and Two Internal Linear Regulators

Functional Block Diagram

DIN CIN1 CIN2

μF

0.1 μF

RTON

kΩ

μF

μF

VOUTV5

COUTV5

μF

μF

VOUTV5P

5 V Protected

VIN(Pin2)

D2

B240A

COUTV5P

μF

μF

D1

B240A

A

.

IC

Power

Soft

Start

Control

Foldback

Foldback

Tracking

ISENSE

External

Controller

with

Foldback

ISENSE

External

Controller

with

Foldback

μF

Microcontroller

Enable

VIGN

kΩ

kΩ

kΩ

8.5 V

Fault Logic

and

Timing

μH

(Max)

DBUCK

COUT1

μF

V

RSENSE

COUT2

μF

μF

Q3V3

VOUT3V3

COUT3V3

μF

μF

μF

Q1V2

kΩ

kΩ

kΩ

VOUT1V2

COUT1V2

μF

μF

Microcontroller

Reset

kΩ

A ProtecƟon diodes D1 and D2 are required when the V5P pin is driving a wiring harness (or excessively long

PCB trace) where parasiƟc inductance will cause the voltage at the V5P to momentarily transiƟon above

VIN or below ground during a fault condiƟon.

Allegro MicroSystems, Inc.

3

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Share Link: