Diodes PAM2303 User Manual download pdf

PAM2303

Document number: DSxxxxx Rev. 1 - 2

1 of 14

www.diodes.com

November 2012

PAM2303

Product Line o

Diodes Incorporated

3A LOW NOISE STEP-DOWN DC-DC CONVERTER

Description

The PAM2303 is a 3A step-down DC-DC converter. It operates in two

different modes: PSM and PWM modes. At light load, it

automactically enters into the PSM mode to improve efficiency. At

heavy load, the constant frequency PWM control performs excellent

stability and transient response. No external compensation

components are required.

The PAM2303 supports a range of input voltages from 2.7V to 5.5V.

The output voltage is adjustable from 0.6V to the input voltage. The

PAM2303 employs 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 1µA. Other key features include over-

temperature and short circuit protection, and under-voltage lockout to

prevent deep battery discharge.

The PAM2303 delivers 3A maximum output current while consuming

only 42µA of no-load quiescent current. Ultra-Low R

DS(ON)

integrated

MOSFETs and 100% duty cycle operation make the PAM2303 an

ideal choice for high-output voltage, high-current applications which

require a low dropout threshold.

The PAM2303 is available in SOP-8(EP), DFN3X3-10 and QFN3X3-

16 package.

Features

• Output Current: Up to 3A

• Output Voltage: 0.6V to V

• Input Voltage: 2.7 to 5.5V

• Efficiency up to 95%

• 42µA (typ) No Load Quiescent Current

• Shutdown Current: <1A

• 100% Duty Cycle Operation

• 1.5MHz Switching Frequency

• Analog Soft Start

• No external Compensation Required

• Current Limit Protection

• Thermal Shutdown

• SOP-8(EP), DFN3X3-10 and QFN3X3-16 Package

Pin Assignments

Applications

• 5V or 3.3V Point of Load Conversion

• Telecom/Networking Equipment

• Set Top Boxes

• Storage Equipment

• Video Cards

• DDR Power Supply

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Summary of Contents

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