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Diodes PAM2321 User Manual

Pam2321, Description, Features

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PAM2321

Document number: DSxxxxx Rev. 2 - 1

1 of 11

www.diodes.com

January 2013

© Diodes Incorporated

PAM2321

A Product Line of

Diodes Incorporated

3MHz, FAST TRANSIENT 2A STEP-DOWN CONVERTER

Description

The PAM2321 is a 2A step-down converter with a typical input
voltage of 3.3V and a fixed output voltage of 1.2V or an adjustable
output. The 3MHz switching frequency enables the use of small
external components. The ultra-small 3mmx3mm footprint and high
efficiency make the PAM2321 an ideal choice for portable
applications.

The PAM2321 delivers 2A maximum output current while consuming
only 55µA no-load quiescent current. Low R

DS(ON)

integrated

MOSFETs and 100% duty cycle operation make the PAM2321 the
ideal choice for high output voltage, high current applications which
require a low dropout threshold.

The PAM2321 provides excellent transient response and output
accuracy across the operating range.

The PAM2321 maintains high efficiency throughout the load range.
The PAM2321 automatically optimizes efficiency during light load
mode (PSM) and maintains constant frequency and low output ripple
during PWM mode.

Over-temperature and short circuit protection safeguard the PAM2321
and system components from damage.

The PAM2321 are available in Pb-free, ultrasmall, low profile,
TDFN3X3-10 package. The product is rated over a temperature range
of -40°C to +85°C.

Features

2A Maximum Output Current

Tiny 0.47µH Chip Inductor

Excellent Transient Response

Input Voltage: 2.7V to 5.5V

Fixed or Adjustable Output Voltage Options:
ƒ

Fixed Output Voltage: 1.2V

ƒ

Adjustable Output Voltage: 1.0V to V

IN

High Efficiency with 3MHz Switching Frequency

55µA No Load Quiescent Current

100% Duty Cycle Low-Dropout Operation

• Internal

Soft-Start

Over-Temperature and Current Limit Protection

• <1µA

Shutdown

Current

-40°C to +85°C Temperature Range

Pb-Free/Halogen Free Package

RoHS/REACH Compliant

Pin Assignments





Applications

• Cellular

Phone

• Digital

Cameras

Hard Disk Drives

• MP3

Players

PDAs and Handheld Computers

Portable Media Players

• USB

Devices

Wireless Network Cards