LM2716 Datasheet, PDF (1/17 Pages) National Semiconductor (TI) – Dual (Step-up and Step-down) PWM DC/DC Converter

February 2004
LM2716
Dual (Step-up and Step-down) PWM DC/DC Converter
General Description
The LM2716 is composed of two PWM DC/DC converters. A
buck (step-down) converter is used to generate a fixed out-
put voltage. A boost (step-up) converter is used to generate
an adjustable output voltage. Both converters feature low
R_DSON (0.16Ω and 0.12Ω) internal switches for maximum
efficiency. Operating frequency can be adjusted anywhere
between 300kHz and 600kHz allowing the use of small
external components. External soft-start pins for each en-
ables the user to tailor the soft-start times to a specific
application. Each converter may also be shut down indepen-
dently with its own shutdown pin. The LM2716 is available in
a low profile 24-lead TSSOP package.
Features
n Fixed buck converter with a 1.8A, 0.16Ω, internal switch
n Adjustable boost converter with a 3.6A, 0.12Ω, internal
switch
n Adjustable boost output voltage up to 20V
n Operating input voltage range of 4V to 20V
n Input undervoltage protection
n 300kHz to 600kHz pin adjustable operating frequency
n Over temperature protection
n Small 24-Lead TSSOP package
n Patented current limit circuitry
Applications
n TFT-LCD Displays
n Handheld Devices
n Portable Applications
n Cellular Phones/Digital Camers
Typical Application Circuit
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