LM2733YMF-NOPB Datasheet, PDF (1/22 Pages) Texas Instruments – LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23

LM2733
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SNVS209E – NOVEMBER 2002 – REVISED APRIL 2013
LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23
Check for Samples: LM2733
FEATURES
1
•2 40V 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 (2.7V–14V)
• Low Shutdown Current (<1 µA)
• 5-Lead SOT-23 Package
• Uses Tiny Capacitors and Inductors
• Cycle-by-Cycle Current Limiting
• Internally Compensated
APPLICATIONS
• White LED Current Source
• PDA’s and Palm-Top Computers
• Digital Cameras
• Portable Phones and Games
• Local Boost Regulator
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 inductors and capacitors result in the
industry's highest power density. The 40V internal
switch makes these solutions perfect 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 design and reduces component count.
Table 1. Switch Frequency
X
1.6 MHz
Y
0.6 MHz
Typical Application Circuit
5 VIN
SHDN
GND
R3
51K
C1
2.2PF
L1/10PH
VIN ^U1 SW
LM2733 ³;´
SHDN
FB
GND
R2
13.3K
D1
MBR0520
R1/117K
CF
220pF
12V
OUT
330mA
(TYP)
C2
4.7PF
5 VIN
SHDN
GND
R3
51K
C1
2.2PF
L1/10PH
VIN ^U1 SW
LM2733 ³;´
SHDN
FB
GND
R2
13.3K
D1
MBR0530
R1/205K
CF
120pF
20V
OUT
170mA
(TYP)
C2
4.7PF
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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