Features

Applications

Description

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Output Current: Up to 3A

Output Voltage: 0.6V to V

Input Voltage: 2.7 to 5.5V

Efficiency up to 95%

42 A (Typ) No Load Quiescent Current

Shutdown Current: <1 A

100% Duty Cycle Operation

1.5MHz Switching Frequency

Internal Soft Start

No external Compensation Required

Current Limit Protection

Thermal Shutdown

PSOP-8 Package

5V or 3.3V Point of Load Conversion

Telecom/Networking Equipment

Set Top Boxes

Storage Equipment

Video Cards

DDR Power Supply

T h e PA M 2 3 2 0 i s a 3 A s t e p - d o w n D C - D C

converter. At heavy load, the constant-frequency

PWM control performs excellent stability and

transient response. No external compensation

components are required

The PAM2320 supports a range of input voltages

from 2.7V to 5.5V, allowing the use of a single

L i + / L i - p o l y m e r c e l l , m u l t i p l e A l k a l i n e / N i M H

cell,and other standard power sources. The

output voltage is adjustable from 0.6V to the input

voltage. The PAM2320 employs internal power

switch and synchronous rectifier to minimize

external part count and realize high efficiency.

During shutdown, the input is disconnected from

the output and the shutdown current is less than

1 A. Other key features include over-temperature

and short circuit protection, and under-voltage

lockout to prevent deep battery discharge.

The PAM2320 delivers 3A maximum output

current while consuming only 42 A of no-load

quiescent current. Ultra-low RDS(ON) integrated

MOSFETs and 100% duty cycle operation make

the PAM2320 an ideal choice for high output

voltage, high current applications which require a

low dropout threshold.

The PAM2320 is available in PSOP8 package.

IN

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Typical Application

1

www.poweranalog.com

05/2011 Rev1.0

,

Power Analog Microelectronics Inc

PAM2320

3A Low Noise Step-Down DC-DC Converter

1

0.6

1

2

O

R

V

R





=

 +









(5)FB

GND(4)

(3)SW

EN(7)

VIN (2)

NC (1,6,8)

PAM 2310

0

CIN

22uF

Cf w

100p

Co

22uF

VIN

0

L

R1

R2

0

0

VO

PAM2320

40uF

30uF