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LM2733 Datasheet

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LM2733
SNVS209G – NOVEMBER 2002 – REVISED MAY 2019
LM2733 0.6- and 1.6-MHz Boost Converters With 40-V Internal FET Switch in SOT-23
1 Features
1 40-V DMOS FET switch
• 1.6-MHz (“X”), 0.6 MHz (“Y”) Switching frequency
• Low RDS(ON) DMOS FET
• Switch current up to 1 A
• Wide input voltage 2.7 V to 14 V
• Low shutdown current (< 1 µA)
• 5-Pin SOT-23 package
• Uses tiny capacitors and inductors
• Cycle-by-cycle current limiting
• Internally compensated
2 Applications
• White LED current source
• PDAs and palm-top computers
• Digital cameras
• Portable phones and games
• Local boost regulator
3 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 1-A switch and use
of small inductors and capacitors, results in the
industry's highest power density. The 40-V internal
switch makes these solutions perfect for boosting to
voltages of 16 V 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 design and reduces component count.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM2733
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
Efficiency vs. Load Current
5 VIN
SHDN
GND
R3
51KQ
C1
2.2PF
L1/10PH
D1
MBR0520
VIN U1 SW
LM2733 ³;´
SHDN
FB
GND
R1/117KQ
12V
OUT
330mA
(TYP)
R2 CF C2
13.3KQ 220pF 4.7PF
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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LM2733 Datasheet Preview

LM2733 Datasheet

Boost Converters

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LM2733
SNVS209G – NOVEMBER 2002 – REVISED MAY 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 4
6.6 Typical Characteristics .............................................. 6
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 11
8 Application and Implementation ........................ 12
8.1 Application Information............................................ 12
8.2 Typical Application .................................................. 12
9 Power Supply Recommendations...................... 18
10 Layout................................................................... 18
10.1 Layout Guidelines ................................................. 18
10.2 Layout Example .................................................... 18
11 Device and Documentation Support ................. 19
11.1 Trademarks ........................................................... 19
11.2 Electrostatic Discharge Caution ............................ 19
11.3 Glossary ................................................................ 19
12 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision F (December 2014) to Revision G
Page
• Changed Typical Application Circuit image to correct rogue connector lines. ...................................................................... 1
Changes from Revision E (April 2013) to Revision F
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
Changes from Revision D (April 2013) to Revision E
Page
• Changed layout of National Semiconductor Data Sheet to TI format .................................................................................. 11
2 Submit Documentation Feedback
Product Folder Links: LM2733
Copyright © 2002–2019, Texas Instruments Incorporated


Part Number LM2733
Description Boost Converters
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