August 22, 2022

0.55

ES9311Q Dual, Ultra-Low Noise Linear Regulator

3

ESS TECHNOLOGY, INC. 109 Bonaventura Dr., San Jose, CA 95134, USA. Tel (408) 643-

8800 • WWW.ESSTECH.COM

PIN DESCRIPTIONS

Pin

Name

Pin Type

Pin Description

1

NC

-

No internal connection, pin may be grounded or left floating

2

ENQD

Input

Enable for Quick Discharge function, internal pull-up

3

ENSS

Input

Enable for Soft-Start function, internal pull-up

4

REF

Output

Low-noise bandgap reference output voltage

5

ADJ

Input

Input for fine adjustment of bandgap voltage output

6

GND

Ground

Ground

7

RFLT

Output

Connection for noise-bypass capacitor on bandgap reference

8

GND

Ground

Ground

9

RT1

I/O

Reserved, Connect to ground for normal operation

10

RT2

I/O

Reserved, Connect to ground for normal operation

11

ENOT#

Input

Enable for Over Temperature functions. Active low

12

EN1

Input

Enable for Output 1. Connect to VIN for automatic startup

13

EN2

Input

Enable for Output 2. Connect to VIN for automatic startup

14

NC

-

No internal connection, pin may be grounded or left floating

15

GND

Ground

Ground

16

FLT2

Output

Connection for noise-bypass capacitor on output 2

17

OC2

Output

Optional output capacitor connection

18

SENSE2

Input

Output 2 Sense

19

FORCE2

Output

Output 2 Force

20

VIN

Power

Regulator supply

21

VIN

Power

Regulator supply

22

FORCE1

Output

Output 1 Force

23

SENSE1

Input

Output 1 Sense

24

OC1

Output

Optional output capacitor connection

25

FLT1

Output

Connection for noise-bypass capacitor on output 1

26

GND

Ground

Ground

27

PG2#

Output

Power Good Output 2. Active low, open-drain

28

PG1#

Output

Power Good Output 1. Active low, open-drain

29

OTW#

Output

Over-Temperature Warning output. Active low, open-drain

30

OTS#

Output

Over-Temperature Shutdown output. Active low, open-drain

-

Exposed Pad

Ground

Connect exposed pad to Ground