lp3202 Lowpower Semiconductor inc, lp3202 Datasheet

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lp3202

Manufacturer Part Number
lp3202
Description
Pwm Step-down Dc/dc Convert
Manufacturer
Lowpower Semiconductor inc
Datasheet

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General Description
The LP3202 is a constant frequency, current mode,
PWM step-down converter. The device integrates a
main switch and a synchronous rectifier for high
efficiency. The 2.1V to 5.5V input voltage range
makes the LP3202 is ideally suited for portable
electronic devices that are powered from 1-cell
Li-ion battery or from other power sources within
the range such as cellular phones, PDAs and
handy-terminals.
Internal synchronous rectifier with low RDS(ON)
dramatically reduces conduction loss at PWM mode.
The
efficiency while eliminate the need for an external
Schottky diode.The switching ripple is easily
smoothed-out by small package filtering elements
due to a fixed operation frequency of 1.5MHz. This
along with small SOT-23-5 package provide small
PCB area application. Other features include soft
start, lower internal reference voltage with 2%
accuracy, over temperature protection, and over
current protection.
Ordering Information
LP3202-01 datasheet Oct.-2006
LP3202 - □ □ □ □ □ □
internal
synchronous
A:Adjustable Output
1.5MHz, 650mA, High Efficiency Synchronous
Output Voltage:
Output Type:
switch
Package Type
B5: SOT-23-5
12: 1.2V
F:Pb-free
18: 1.8V
25: 2.5V
28: 2.8V
33: 3.3v
increases
Features
Applications
Pin Configurations
Marking Information
Please See website.
PWM Step-Down DC/DC Convert
High Efficiency: 93%
1.5MHz Fixed-Frequency PWM Operation
Adjustable Output From 0.6V to VIN
1.2V, 1.5V, 1.8V, 2.5V, 2.8V and 3.3V Fixed
650mA Output Current, 1.1A Peak Current
No Schottky Diode Required
100% Duty Cycle Low Dropout Operation
Available in SOT23-5 Package
Short Circuit and Thermal Protection
Over Voltage Protection
Low than 1µA Shutdown Current
Portable Media Players/MP3 players
Cellular and Smart mobile phone
PDA
DSC
Wireless Card
1
-
1
LP3202

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lp3202 Summary of contents

Page 1

... High Efficiency Synchronous General Description The LP3202 is a constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.1V to 5.5V input voltage range makes the LP3202 is ideally suited for portable electronic devices that are powered from 1-cell ...

Page 2

... Typical Application Circuit LP3202-01 datasheet Oct.-2006 - 2 2 LP3202 ...

Page 3

... Functional Pin Description Function Block Diagram Absolute Maximum Ratings LP3202-01 datasheet Oct.-2006 - 3 3 LP3202 ...

Page 4

... P(LM) Limit 5 Threshold EN Leakage V ENL Current LP3202-01 datasheet Oct.-2006 Test Conditions IOUT = 0mA, VFB = VREF + GND For adjustable output voltage VIN = 2.2 to 5.5V, VOUT = 1.0V 0A < IOUT < 600mA VIN = 2.2 to 5.5V, VOUT = 1.2V 0A < IOUT < 600mA VIN = 2.2 to 5.5V, VOUT = 1.5V 0A < IOUT < 600mA VIN = 2.2 to 5.5V, VOUT = 1.8V 0A < ...

Page 5

... Typical Operating Characteristics LP3202-01 datasheet Oct.-2006 - 5 5 LP3202 ...

Page 6

... LP3202-01 datasheet Oct.-2006 - 6 6 LP3202 ...

Page 7

... LP3202-01 datasheet Oct.-2006 - 7 7 LP3202 ...

Page 8

... Applications Information The basic LP3202 application circuit is shown in Typical Application Circuit. External component selection is determined by the maximum load current and begins with the selection of the inductor value and operating frequency followed by CIN and COUT. LP3202-01 datasheet Oct.-2006 - 8 8 LP3202 ...

Page 9

... LP3202-01 datasheet Oct.-2006 - 9 9 LP3202 ...

Page 10

... Layout Considerations Follow the PCB layout guidelines for optimal performance of LP3202. For the main current paths as indicated in bold lines, keep their traces short and wide. Put the input capacitor as close as possible to the device pins (VIN and GND). ...

Page 11

... LP3202-01 datasheet Oct.-2006 - 11 11 LP3202 ...

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