LM2733_15 Datasheet, PDF (1/26 Pages) Texas Instruments – 0.6 and 1.6-MHz Boost Converters With 40-V Internal FET Switch in SOT-23

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LM2733
SNVS209F – NOVEMBER 2002 – REVISED DECEMBER 2014
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 R_DS(ON) DMOS FET
• Switch Current up to 1A
• Wide Input Voltage Range (2.7 V – 14 V)
• Low Shutdown Current (< 1 µA)
• 5-Lead SOT-23 Package
• Uses Tiny Capacitors and Inductors
• Cycle-by-Cycle Current Limiting
• Internally Compensated
2 Applications
• White LED Current Source
• PDA’s 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 result 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 x 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
5 V_IN
SHDN
GND
R3
51K
C1
2.22F
L1/102H
V_IN ^U1 SW
LM2733 ³;´
SHDN
FB
GND
R2
13.3K
D1
MBR0520
R1/117K
CF
220pF
12V
OUT
330mA
(TYP)
C2
4.72F
Efficiency vs. Load Current
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.