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PAM2306LX1YPAA

Description
Dual High-Efficiency PWM Step-Down DC-DC Coverter
File Size373KB,15 Pages
ManufacturerPOWEREX
Websitehttp://www.pwrx.com/Home.aspx
Download Datasheet View All

PAM2306LX1YPAA Overview

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

Dual High-Efficiency PWM Step-Down DC-DC Coverter
PAM2306
Features
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Efficiency up to 96%
n
Only 40μA (Typ. per Channel) Quiescent
Current
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Output Current: Up to 1A per Channel
n
Internal Synchronous Rectifier
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1.5MHz Switching Frequency
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Soft Start
n
Under-Voltage Lockout
n
Short Circuit Protection
n
Thermal Shutdown
n
Small 12L WDFN3x3 Package
n
Pb-Free Package and RoHS Compliant
General Description
The PAM2306 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
PA M 2 3 0 6 p r o v i d e s a p o w e r - s a v i n g P u l s e -
Skipping Modulation (PSM) mode to reduce
quiescent current under light load operation.
The PAM2306 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 3.3V, 2.8V, 2.5V,
1.8V, 1.5V, 1.2V or adjustable. 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 μ A. Other key features
include under-voltage lockout to prevent deep
battery discharge.
Applications
n
n
n
n
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Cellular Phone
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
Typical Application
L2
C
OUT2
10μF
V
OUT2
V
IN2
1 VIN2
C
IN2
4 7μF
R12
2
3
4
LX2
GND
FB1
PAM2306
EN2 12
NC2 11
FB2 10
GND
LX1
9
8
R22
C
IN1
4. μF
7
V
IN1
R21
C
FW2
100 pF
5 NC1
C
Fw1
100 pF
V
OUT1
C
OUT1
10μF
R11
6 EN1
L1
VIN1 7
V
OUTx
=
V
REF
1
+
Rx1
Rx2
(
)
Figure 1. Adjustable Voltage Regulator
Power Analog Microelectronics
,
Inc
www.poweranalog.com
1
07/2008 Rev 1.0
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