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PAM2308

Document number: DSxxxxx Rev. 1 - 1

1 of 15

www.diodes.com

January 2013

PAM2308

Product Line o

Diodes Incorporated

DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER

Description

The PAM2308 is a dual step-down current-mode, DC-DC converter.

At heavy load, the constant frequency PWM control performs

excellent stability and transient response. To ensure the longest

battery life in portable applications, the PAM2308 provides a power-

saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent

current under light load operation.

The PAM2308 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 dual output

voltages are available for 3.3V, 2.8V, 2.5V, 1.8V, 1.5V, 1.2V or

adjustable. 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.

Features

• Efficiency up to 96%

• Only 40μA (typ per channel) Quiescent Current

• Output Current: Up to 1A per Channel

• Internal Synchronous Rectifier

• 1.5MHz Switching Frequency

• Soft-Start

• Under-Voltage Lockout

• Short Circuit Protection

• Thermal Shutdown

• Small WDFN3x3-10L Packages

• Pb-Free Package and RoHS Compliant

Pin Assignments

Applications

• Cellular Phone

• Portable Electronics

• Personal Information Appliances

• Wireless and DSL Modems

• MP3 Players

Typical Applications Circuit

⎟

⎠

⎞

⎜

⎝

⎛

2Rx

1Rx

REFOUTx

Figure 1. Adjustable Voltage Regulator

1 2 3 4 5 6 ... 14 15

Resumo do Conteúdo

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Página 2 - Pin Descriptions

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Página 12 - PCB Layout Check List

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Página 13 - Marking Information

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