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LM27403 Datenblatt(PDF) 1 Page - Texas Instruments

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Teilenummer LM27403
Bauteilbeschribung  Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based Overcurrent Protection and Programmable Thermal Shutdown
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM27403 Datenblatt(HTML) 1 Page - Texas Instruments

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CBOOT
HG
SW
LG
VDD
GND
SS/TRACK
RS
FB
COMP
FADJ
SYNC
VIN
VOUT+
VOUT±
LM27403
VOUT+
VIN
D+
VDD
GND
LM27403
www.ti.com
SNVS896 A – AUGUST 2013 – REVISED SEPTEMBER 2013
Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based
Overcurrent Protection and Programmable Thermal Shutdown
Check for Samples: LM27403
1
FEATURES
APPLICATIONS
2
Up to 97% Efficiency and 93% Duty Cycle
DC-DC Converters
Wide Input Voltage Range of 3 V to 20 V
High Power Density POL Modules
Switching Frequency from 200 kHz to 1.2 MHz
Telecommunications Infrastructure
Inductor-DCR-Based Overcurrent Protection
Embedded Computing, Servers, Storage
with Thermal Compensation
DESCRIPTION
0.6-V Reference with 1% Feedback Accuracy
The
LM27403
is
a
feature-rich,
easy-to-use,
30-ns Min On-Time for Low VOUT
synchronous buck controller offering exceptional
Integrated High-Current MOSFET Drivers
levels of integration and performance for superior
Adaptive Deadtime Control
efficiency in high power density, point-of-load (POL)
DC-DC
regulator
solutions.
The
resistor-
Ultrafast Line and Load Transient Response
programmable switching frequency from 200 kHz to
High GBW Error Amplifier
1.2 MHz and integrated, high-current MOSFET gate
PWM Line Feedforward
drivers with adaptive deadtime offer flexibility to
optimize solution size and maximize conversion
Integrated VDD Bias Supply LDO Subregulator
efficiency.
Programmable System-Level OTP
High precision and low output voltage are easily
Precision Enable with Hysteresis
obtained with a 0.6-V, 1% accurate voltage reference
Frequency Synchronization
together with a 30-ns high-side MOSFET minimum
Monotonic Prebiased Startup with Soft-Start
controllable on-time. Using lossless inductor dc
resistance (DCR) current sensing and an inexpensive
Open-Drain Power Good Indicator
2N3904 BJT to sense temperature remotely at the
4 mm x 4 mm, WQFN-24 PowerPAD™ Package
inductor,
the
LM27403
supports
accurate
and
thermally-compensated overcurrent protection (OCP).
TYPICAL APPLICATION DIAGRAM
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
and Power Block NexFET is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013, Texas Instruments Incorporated
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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