PAM2322AGEAR

Document Number: DS36234 Rev. 2 - 2

1 of 13

www.diodes.com

September 2014

© Diodes Incorporated

PAM2322AGEAR

A Product Line of

Diodes Incorporated

Dual High-Efficiency PWM Step-Down DC-DC Converter

Description

The PAM2322AGEAR is a dual step-down current-mode, DC-DC

converter. At heavy load, the constant-frequency PWM control

performs with excellent stability and transient response. To ensure

the longest battery life in portable applications, the PAM2322AGEAR

provides a power-saving Pulse-Skipping Modulation (PSM) mode to

reduce quiescent current under light load operation

The PAM2322AGEAR supports a range of input voltages from 2.7V to

5.5V, allowing the use of a single Li+/Li-polymer cell, multiple

Alkaline/NiMH cell, USB, and other standard power sources. Output 1

is a 1.8V fixed output. Output 2 is adjustable from 0.9V to VIN. Both

outputs employ an internal power switch and synchronous rectifier to

minimize external part count and realize high efficiency.

Output 1 delivers up to 1000mA output current while output 2 delivers

up to 2000mA. Each regulator has an independent enable pin.

Each output of the PAM2322AGEAR can be disabled when a logic

low is applied to the channel enable pin. During shutdown, the input is

disconnected from the output and the shutdown current is less than

0.1μA

Other key features include under-voltage lockout, soft-start, hiccup

mode short circuit protection and thermal shutdown.

Features



Supply Voltage:2.7V to 5.5V



Output Current:

OUT1: 1000mA/Buck, 1.8V Fixed Output

OUT2: 2000mA/Buck



Switching Frequency:1.2MHz



Internal Synchronous Rectifier



Fast Transient Response



Fast Turn On and Turn Off



Internal Soft Start



Internal Compensation



100% Duty Cycle Operation



Power Good Indicator for OUT1



Under-Voltage Lockout



Hiccup Mode Short Circuit Protection



Thermal Shutdown



Small W-FLGA2520-17 Package



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

W-FLGA2520-17

Applications



Portable Electronics



Personal Information Appliances



Wireless and DSL Modems

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com

for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.