PAM2306D
Dual High-Efficiency PWM Step-Down DC-DC Coverter
Features
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Efficiency up to 96%
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Only 40µA (Typ. per Channel) Quiescent
Current
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Output Current: Up to 1A per Channel
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Internal Synchronous Rectifier
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1.5MHz Switching Frequency
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Soft Start
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Under-Voltage Lockout
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Short Circuit Protection
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Thermal Shutdown
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Small 12L WDFN3x3 Package
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Pb-Free Package and RoHS Compliant
General Description
The PAM2306D is a dual step-down current-
mode, DC-DC converter. At heavy load, the
constant-fr equency PWM control performs
excellent stability and transient response. To
ensure the longest battery life in portable
applications, the PAM2306D provides a power-
saving Pulse-Skipping Modulation (PSM) mode to
r ed uc e q ui e sc e nt c u r r en t un de r li gh t l oa d
operation.
The PAM2306D 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 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 ff 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
μ
A. Other key features include under-voltage
lockout to prevent deep battery discharge.
Applications
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n
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Cellular Phone
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
Typical Application
L2
C
OUT2
10
μ
F
V
OUT2
V
IN2
1 V IN2
C
IN2
4.7μF
R12
2
3
4
5
C
Fw1
100 pF
V
OUT1
C
OUT1
10
μ
F
R11
6
LX2
G ND
FB1
NC1
E N1
L1
PAM2306D
EN2 12
NC2
FB2
G ND
LX1
V IN1
11
10
9
8
7
R22
C
IN1
4.7
μF
V
IN1
R21
C
FW2
100 pF
V
OUTx
=
V
REF
1
+
Rx1
Rx2
(
)
Power Analog Microelectronics
,
Inc
www.poweranalog.com
1
02/2012 Rev1.1
PAM [ POWER ANALOG MICOELECTRONICS ]
