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What is LM2733?

This electronic component, produced by the manufacturer "National Semiconductor", performs the same function as "0.6/1.6 MHz Boost Converters With 40V Internal FET".


LM2733 Datasheet PDF - National Semiconductor

Part Number LM2733
Description 0.6/1.6 MHz Boost Converters With 40V Internal FET
Manufacturers National Semiconductor 
Logo National Semiconductor Logo 


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February 2003
LM2733
0.6/1.6 MHz Boost Converters With 40V Internal FET
Switch in SOT-23
General Description
The LM2733 switching regulators are current-mode boost
converters operating fixed frequency of 1.6 MHz (“X” option)
and 600 kHz (“Y” option).
The use of SOT-23 package, made possible by the minimal
power loss of the internal 1A switch, and use of small induc-
tors and capacitors result in the industry’s highest power
density. The 40V internal switch makes these solutions per-
fect for boosting to voltages of 16V or greater.
These parts have a logic-level shutdown pin that can be
used to reduce quiescent current and extend battery life.
Protection is provided through cycle-by-cycle current limiting
and thermal shutdown. Internal compensation simplifies de-
sign and reduces component count.
Switch Frequency
X
1.6 MHz
Y
0.6 MHz
Features
n 40V DMOS FET switch
n 1.6 MHz (“X”), 0.6 MHz (“Y”) switching frequency
n Low RDS(ON) DMOS FET
n Switch current up to 1A
n Wide input voltage range (2.7V–14V)
n Low shutdown current (<1 µA)
n 5-Lead SOT-23 package
n Uses tiny capacitors and inductors
n Cycle-by-cycle current limiting
n Internally compensated
Applications
n White LED Current Source
n PDA’s and Palm-Top Computers
n Digital Cameras
n Portable Phones and Games
n Local Boost Regulator
Typical Application Circuit
20055424
20055401
© 2003 National Semiconductor Corporation DS200554
20055457
20055458
www.national.com

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LM2733 equivalent
Typical Performance Characteristics Unless otherwise specified: VIN = 5V, SHDN pin is tied to VIN.
Iq VIN (Active) vs Temperature - "X"
Iq VIN (Active) vs Temperature - "Y"
20055410
Oscillator Frequency vs Temperature - "X"
20055442
Oscillator Frequency vs Temperature - "Y"
20055408
Max. Duty Cycle vs Temperature - "X"
20055443
Max. Duty Cycle vs Temperature - "Y"
20055455
5
20055456
www.national.com


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LM2733 datasheet


1. - Switching Regulator, Boost Converter

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