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PAM2308GNDYMEE Datasheet(PDF) 1 Page - Power Analog Micoelectronics

Part # PAM2308GNDYMEE
Description  Dual High-Efficiency PWM Step-Down DC-DC Coverter
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Manufacturer  PAM [Power Analog Micoelectronics]
Direct Link  http://www.poweranalog.com
Logo PAM - Power Analog Micoelectronics

PAM2308GNDYMEE Datasheet(HTML) 1 Page - Power Analog Micoelectronics

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PAM2308
Dual High-Efficiency PWM Step-Down DC-DC Coverter
1
,
Power Analog Microelectronics Inc
www.poweranalog.com
07/2008 Rev 1.0
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 10L WDFN 3x3
Packages
RoHS Compliant
Cellular Phone
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
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.
All versions
employ internal power switch and synchronous
rectifier for 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 0.1 A. Other key features
include under-voltage lockout to prevent deep
battery discharge.
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Pb-Free Package and
μ
The dual
output voltages are available for 3.3V, 2.8V, 2.5V,
1.8V, 1.5V, 1.2V or adjustable.
Typical Application
(
)
Rx2
Rx1
1
V
V
REF
OUTx
+
=
Figure 1. Adjustable Voltage Regulator
EN2
FB2
VIN2
LX2
FB1
PAM2308
1
2
9
10
GND
LX1
GND
8
5
VOUT2
L2
10 F
μ
CIN2
100pF
VIN1
7
6
EN1
VIN1
4
.7μF
L1
R22
4
.7μF
VOUT1
100nF
10 F
μ
R12
VIN2
C
Fw1
COUT1
CIN1
COUT2
C
FW2
R11
R21
3
4


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