AOZ2003

Rev. 1.1 August 2012

www.aosmd.com

Page 2 of 12

Ordering Information

AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.

Pin Configuration

Pin Description

Part Number

Ambient Temperature Range

Package

Environmental

AOZ2003PI

-40 °C to +85 °C

EPAD SO-8

Green Product

Pin Number

Pin Name

Pin Function

1

POK

Power OK Indication. This pin is an open-drain output and is set high impedance once

VOUT reaches 90% of its rating voltage.

2

EN

Enable Input. Pulling this pin below 0.8V turns the regulator off, reducing the quiescent

current to a fraction of its operating value.

3

VIN

Input Voltage. This is the drain input to the power device that supply current to the output

pin. Large bulk capacitors with low ESR should be placed physically close to this pin o

prevent the input rail from dropping during large load transient. A 10

recommended at this pin.

4

VCNTL

Supply Input for Control Circuit. This pin provides bias voltage to the control circuitry and

driver for the pass transistor. The driving capability of output current is proportioned to the

VCNTL. For the device to regulate, the voltage on this pin must be at least 3V greater than

the output voltage, and no less than VCNTL_min.

5

NC

Not Internally Connected.

6

VOUT

Output Voltage. This pin is power output of the device. A pull low resistance exists when the

device is disabled by pulling low the EN pin.

7

FB

Feedback Voltage. This pin is the inverting input to the error amplifier. A resistor divider

from the output to GND is used to set the regulation voltage as VOUT=0.8x(R1+R2)/R2 (V)

8

GND

Ground.

Exposed PAD

GND

Ground. The exposed pad acts the dominant power dissipation path and should be

soldered to well design PCB pads.

POK

1

GND

8

EN

2

FB

7

VIN

3

VOUT

6

VCNTL

4

NC

5

Exposed

PAD

GND

EPAD SO-8

(Top View)