PAM2306D

Dual High-Efficiency PWM Step-Down DC-DC Coverter

1

,

Power Analog Microelectronics Inc

www.poweranalog.com

02/2012 Rev1.1

Features

Applications

General Description

n 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 12L WDFN3x3 Package

RoHS Compliant

Cellular Phone

Portable Electronics

Personal Information Appliances

Wireless and DSL Modems

MP3 Players

The PAM2306D is a dual step-down current-

mode, DC-DC converter. At heavy load, the

c o n s t a n t - f r e q u e n c y P W M c o n t r o l p e r f o r m s

excellent stability and transient response. To

ensure the longe st ba ttery life in portable

applications, the PAM2306D provides a power-

saving Pulse-Skipping Modulation (PSM) mode to

r e d u c e q u i e sc e n t c u r r e n t u n d e r li g h t l o a d

operation.

The PAM 23 06 D sup po rts a ra ng e o f in pu t

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 adjustmen t.

All versions employ internal power switch and

synchronous rectifier for to minimize external part

c o u n t a n d r e a l i z e h i g h e f f i c i e n c y. D u r i n g

shutdown, the input is disconnected from the

output and the shutdown current is less than

0.1 A. Other key features include under-voltage

lockout to prevent deep battery discharge.

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Pb-Free Package and

μ

Typical Application

(

)

Rx2

Rx1

1

V

V

REF

OUTx

+

=

EN2

NC2

FB2

V IN2

LX2

FB1

PAM2306D

1

2

4

9

10

11

G ND

LX1

G ND

8

5

NC1

3

12

L2

10 F

μ

100 pF

V IN1

7

6

E N1

4.7

μF

L1

R22

4.7

μF

100 pF

10 F

μ

R12

C

Fw1

C

FW2

R11

R21