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PAM2305D

Document number: DSxxxxx Rev. 2 - 1

1 of 15

www.diodes.com

January 2013

PAM2305D

Product Line o

Diodes Incorporated

1A STEP-DOWN DC-DC CONVERTER

Description

The PAM2305D is a step-down current-mode, DC-DC converter. At

heavy load, the constant frequency PWM control per forms excellent

stability and transient response. To ensure the longest battery life in

portable applications, the PAM2305D provides a power-saving Pulse-

Skipping Modulation (PSM) mode to reduce quiescent current under

light load operation to save power.

The PAM2305D 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 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

0.1µA. Other key features include under-voltage lockout to prevent

deep battery discharge.

The PAM2305D is available in TSOT25, DFN2x2-6 Pin and QFN3x3-

16 Pin packages.

Features

• Efficiency up to 96%

• Only 40µA (typ) Quiescent Current

• Output Current: Up to 1A

• Internal Synchronous Rectifier

• 1.5MHz Switching Frequency

• Soft Start

• Under-Voltage Lockout

• Short Circuit Protection

• Thermal Shutdown

• 5-pin Small TSOT25, DFN2x2-6 Pin and QFN3x3-16 Pin

Packages

• Pb-Free Packages

Applications

• Cellular Phone

• Portable Electronics

• Wireless Devices

• Cordless Phone

• Computer Peripherals

• Battery Powered Widgets

• Electronic Scales

• Digital Frame

Pin Assignments

Top View

TSOT25

1 2 3 4 5 6 ... 14 15

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