12 V High-Side Hot-Swap Hall Effect Based Current Monitor IC

ACS761ELF-20B

3

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Terminal List Table

Number

Name

Function

1-6

IP+

7

EN

Enable pin. The falling edge on the EN pin clears an overpower, overcurrent, or short circuit fault.

8

VIOUT

Analog output. Output voltage on this pin is proportional to the current flowing from the IP+ pins to the IP– pins.

9

NC

No connect. Connection to ground is recommended.

10

CG

between this pin and GND. This capacitor is charged by an internal 20 μA current source.

11

OCDLY

12

OPDLY

13

¯F¯¯A¯U¯¯L¯¯T¯

Active low; output signal for device short circuit and overpower faults. Connect a pull-up resistor between this pin

and the 3.3 V rail.

14

¯P¯¯G¯¯O¯¯O¯¯D¯

Active low; output signal indicating load voltage has risen to the proper level.

15

FB+

Input of positive feedback on output voltage. Used to determine overpower fault threshold by difference between

FB+ and GND pins.

16

PGOOD

Active high; output signal indicating load voltage has risen to the proper level.

17

GND

Terminal for ground connection.

18

GATE

Terminal for external MOSFET, S1. Provides output voltage to drive S1. Current through S1 is controlled at start-

up by external capacitance connected between the CG pin and GND.

19-24

IP–

Primary sampled current conduction path output; power output pins.

Pin-out Diagram

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

IP–

IP–

IP–

IP–

IP–

IP–

GATE

GND

PGOOD

FB+

PGOOD

FAULT

IP+

IP+

IP+

IP+

IP+

IP+

EN

VIOUT

NC

CG

OCDLY

OPDLY