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

Pin-out Diagram

VCP 1

VIN 2

GND 3

TON 4

ENBAT 5

ENB 6

ENBATS 7

NPOR 8

CPOR 9

TRACK 10

V5 11

V5P 12

PAD

24 CP2

23 CP1

22 LX

21 ISEN+

20 ISEN–

19 VREG

18 CL3V3

17 G3V3

16 3V3

15 CL1V2

14 G1V2

13 1V2

Terminal List Table

Number

Name

1

VCP

2

VIN

3

GND

4

TON

5

ENBAT

6

ENB

7

ENBATS

8

NPOR

9

CPOR

10

TRACK

11

V5

12

V5P

13

1V2

14

G1V2

15

CL1V2

16

3V3

17

G3V3

18

CL3V3

19

VREG

20

ISEN–

21

ISEN+

22

LX

23

CP1

24

CP2

–

PAD

Function

Charge pump reservoir capacitor

Input voltage

Ground

Buck regulator on-time programming pin

Ignition enable input from the key/switch via a 1 kΩ resistor

Logic enable input from the microcontroller

Open drain ignition status output

Open-drain fault indication output; active low

NPOR delay programming pin

Sets the V5P tracking to either the 3V3 or V5 linear regulator

5 V regulator output

5 V tracking/protected regulator output

1.2 V/1.5 V/1.8 V regulator output

Gate driver to the external MOSFET for 1.2 V/1.5 V/1.8 V regulation

1.2 V/1.5 V/1.8 V current sense/limit input

3.3 V regulator output

Gate driver to the external MOSFET for 3.3 V regulation

3.3 V current sense/limit input

Buck regulator DC output and input to the 3.3 V external regulator

Buck negative current sense pin, sense resistor and diode node

Buck positive current sense pin, sense resistor/ground node

Buck regulator switching node

Charge pump capacitor connection

Charge pump capacitor connection

Exposed thermal pad for enhanced heat dissipation

Allegro MicroSystems, Inc.

4

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Share Link: