Features

Applications

General Description

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Efficiency up to 95%

Only 40 A(TYP.) Quiescent Current

Output Current: Up to 1A

Internal Synchronous Rectifier

3MHz Switching Frequency

Soft Start

Under-Voltage Lockout

Short Circuit Protection

Thermal Shutdown

Small TSOT23-5, TDFN22-8 and

TDFN22-6 Packages

Smart Phone

MID

Portable Electronics

Wireless Devices

Cordless Phone

Computer Peripherals

Battery Powered Widgets

Electronic Scales

Digital Frame

The PAM2304 is a step-down current-mode, DC-

DC converter. At heavy load, the constant-

f re q u e n cy P WM co n t ro l p e r fo r m s e xc e lle n t

stability and transient response. To ensure the

longest battery life in portable applications, the

PA M 2 3 0 4 p r o v i d e s a p o w e r - s a v i n g P u l s e -

Skipping Modulation (PSM) mode to reduce

quiescent current under light load operation to

save power.

The PAM2304 supports a range of input voltages

from 2.5V to 5.5V, allowing the use of a single

Li+/Li-polymer cell, multiple Alkaline/NiMH cell,

USB, and other standard power sources. The

output voltage is adjustable from 0.6V to the input

voltage. All versions employ internal power switch

and synchronous rectifierfor 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 under-voltage lockout

to prevent deep battery discharge.

The PAM2304 is available in TSOT23-5, TDFN22-

8 and TDFN22-6 packages.

μ

μ

RoHS Pass and Green Package

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Typical Application

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www.poweranalog.com

PAM2304

3MHz, 1A Step-Down DC-DC Converter

11/2011 Rev1.1

,

Power Analog Microelectronics Inc

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0.6

1

2

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V

R





=

 +









VIN

SW

GND

EN

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1uH

Vo

Co

10µF

V

C

IN

IN

10µF

R1

R2

FB

Cfw

100pF