LM2735 Datasheet, PDF (1/58 Pages) National Semiconductor (TI) – 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator

LM2735
www.ti.com
SNVS485F – JUNE 2007 – REVISED APRIL 2013
LM2735/LM2735-Q1 520kHz/1.6MHz – Space-Efficient Boost and SEPIC DC-DC Regulator
Check for Samples: LM2735
FEATURES
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•2 Input Voltage Range 2.7V to 5.5V
• Output Voltage Range 3V to 24V
• 2.1A Switch Current over Full Temperature
Range
• Current-Mode Control
• Logic High Enable Pin
• Ultra Low Standby Current of 80 nA in
Shutdown
• 170 mΩ NMOS Switch
• ±2% Feedback Voltage Accuracy
• Ease-of-Use, Small Total Solution Size
– Internal Soft-Start
– Internal Compensation
– Two Switching Frequencies
– 520 kHz (LM2735-Y)
– 1.6 MHz (LM2735-X)
– Uses Small Surface Mount Inductors and
Chip Capacitors
– Tiny SOT-23, WSON, and MSOP-PowerPAD
Packages
• LM2735-Q1 is AEC-Q100 Grade 1 Qualified and
is Manufactured on an Automotive Grade Flow
DESCRIPTION
The LM2735 is an easy-to-use, space-efficient 2.1A
low-side switch regulator ideal for Boost and SEPIC
DC-DC regulation. It provides all the active functions
to provide local DC/DC conversion with fast-transient
response and accurate regulation in the smallest PCB
area. Switching frequency is internally set to either
520kHz or 1.6MHz, allowing the use of extremely
small surface mount inductor and chip capacitors
while providing efficiencies up to 90%. Current-mode
control and internal compensation provide ease-of-
use, minimal component count, and high-
performance regulation over a wide range of
operating conditions. External shutdown features an
ultra-low standby current of 80 nA ideal for portable
applications. Tiny SOT-23, WSON, and MSOP-
PowerPAD packages provide space-savings.
Additional features include internal soft-start, circuitry
to reduce inrush current, pulse-by-pulse current limit,
and thermal shutdown.
APPLICATIONS
• LCD Display Backlighting For Portable
Applications
• OLED Panel Power Supply
• USB Powered Devices
• Digital Still and Video Cameras
• White LED Current Source
• Automotive
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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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