Features

Applications

Description

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Output Current: Up to 3A

Output Voltage: 0.6V to V

Input Voltage: 2.7 to 5.5V

Efficiency up to 95%

42 A (Typ) No Load Quiescent Current

Shutdown Current: <1 A

100% Duty Cycle Operation

1.5MHz Switching Frequency

Internal Soft Start

No external Compensation Required

Current Limit Protection

Thermal Shutdown

QFN3x3 16-Pin and SOP-8(EP) Package

5V or 3.3V Point of Load Conversion

Telecom/Networking Equipment

Set Top Boxes

Storage Equipment

Video Cards

DDR Power Supply

T h e PA M 2 3 0 7 i s a 3 A s t e p - d o w n D C - D C

converter. At heavy load, the constant-frequency

PWM control performs excellent stability and

transient response. No external compensation

components are required

The PAM2307 supports a range of input voltages

from 2.7V to 5.5V, allowing the use of a single

L i + / L i - p o l y m e r c e l l , m u l t i p l e A l k a l i n e / N i M H

cell,and other standard power sources. The

output voltage is adjustable from 0.6V to the input

voltage. The PAM2307 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

1 A. Other key features include over-temperature

and short circuit protection, and under-voltage

lockout to prevent deep battery discharge.

The PAM2307 delivers 3A maximum output

current while consuming only 42 A of no-load

quiescent current. Ultra-low RDS(ON) integrated

MOSFETs and 100% duty cycle operation make

the PAM2307 an ideal choice for high output

voltage, high current applications which require a

low dropout threshold.

The PAM2307 is available in QFN3x3 16-Pin and

SOP-8(EP) package.

IN

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Typical Application

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www.poweranalog.com

03/2011 Rev2.1

,

Power Analog Microelectronics Inc

PAM2307

3A Low Noise Step-Down DC-DC Converter

1

0.6

1

2

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R

V

R

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

=

 +



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

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U 1

PAM2307

PVIN

VI N

EN

TEST

SW

F B

C1

C 2

L 1

1

2

R 1

R2

C3

100pF

R 3

1k

C 4

1uF

22uF

22uF

VIN

VOU T