A Product Line of
Dual High-Efficiency PWM Step-Down DC-DC Converter
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
Other key features include under-voltage lockout, soft-start, hiccup
mode short circuit protection and thermal shutdown.
Supply Voltage:2.7V to 5.5V
OUT1: 1000mA/Buck, 1.8V Fixed Output
Internal Synchronous Rectifier
Fast Transient Response
Fast Turn On and Turn Off
Internal Soft Start
100% Duty Cycle Operation
Power Good Indicator for OUT1
Hiccup Mode Short Circuit Protection
Small W-FLGA2520-17 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Personal Information Appliances
Wireless and DSL Modems
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.
Document Number: DS36234 Rev. 2 - 2
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