LM27313_15 Datasheet, PDF (1/25 Pages) Texas Instruments – LM27313/-Q1 1.6-MHz Boost Converter With 30-V Internal FET Switch in SOT-23

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LM27313, LM27313-Q1
SNVS487E – DECEMBER 2006 – REVISED JANUARY 2015
LM27313/-Q1 1.6-MHz Boost Converter With 30-V Internal FET Switch in SOT-23
1 Features
•1 LM27313-Q1 is an Automotive-Grade Product that
is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
Operating Junction Temperature)
• 30-V DMOS FET Switch
• 1.6-MHz Switching Frequency
• Low R_DS(ON) DMOS FET
• Switch Current up to 800 mA
• Wide Input Voltage Range (2.7 V to 14 V)
• Low Shutdown Current (< 1 µA)
• 5-Lead SOT-23 Package
• Uses Tiny Capacitors and Inductors
• Cycle-by-Cycle Current Limiting
• Internally Compensated
3 Description
The LM27313/-Q1 switching regulator is a current-
mode boost converter with a fixed operating
frequency of 1.6 MHz.
The use of the SOT-23 package, made possible by
the minimal losses of the 800-mA switch, and the
small inductors and capacitors result in extremely
high power density. The 30-V internal switch makes
these solutions perfect for boosting to voltages of 5 V
to 28 V.
This device has 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.
2 Applications
• White LED Current Source
• PDAs and Palm-Top Computers
• Digital Cameras
• Portable Phones, Games, and Media Players
• GPS Devices
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM27313
LM27313-Q1
SOT-23 (5)
2.90 mm x 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 V_IN
SHDN
GND
L1/10 2H
V_IN ^U1 SW
R3
51k
C1
2.2 2F
LM27313
SHDN
FB
GND
R2
13.3k
D1
MBR0520
R1/117k
CF
220 pF
12V
OUT
260 mA
(TYP)
C2
4.7 2F
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.