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LM21215A датащи(PDF) 1 Page - Texas Instruments

номер детали LM21215A
подробное описание детали  LM21215A-1 15A High Efficiency Synchronous Buck Regulator with Frequency Synchronization
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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LM21215A датащи(HTML) 1 Page - Texas Instruments

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LM21215A
www.ti.com
SNOSB87B – MARCH 2011 – REVISED MARCH 2013
LM21215A-1 15A High Efficiency Synchronous Buck Regulator with Frequency
Synchronization
Check for Samples: LM21215A
1
FEATURES
DESCRIPTION
The LM21215A-1 is a monolithic synchronous buck
2
Integrated 7.0 m
Ω High Side and 4.3 mΩ Low
regulator that is capable of delivering up to 15A of
Side FET Switches
continuous output current while producing an output
300 kHz to 1.5 MHz Frequency SYNC Pin
voltage down to 0.6V with outstanding efficiency. The
Adjustable Output Voltage from 0.6V to VIN
device is optimized to work over an input voltage
range of 2.95V to 5.5V, making it suited for a wide
(100% Duty Cycle Capable), ±1% Reference
variety of low voltage systems. The voltage mode
Input Voltage Range 2.95V to 5.5V
control loop provides high noise immunity, narrow
Startup into Pre-biased Loads
duty cycle capability and can be compensated to be
Output Voltage Tracking Capability
stable with any type of output capacitance, providing
maximum flexibility and ease of use.
Wide Bandwidth Voltage Loop Error Amplifier
The LM21215A-1 features internal over voltage
Adjustable Soft-start with External Capacitor
protection (OVP) and over-current protection (OCP)
Precision Enable Pin with Hysteresis
for increased system reliability. A precision enable pin
Integrated OVP, OCP, OTP, UVLO and Power-
and integrated UVLO allow turn-on of the device to
Good
be tightly controlled and sequenced. Startup inrush
currents are limited by both an internally fixed and
Thermally Enhanced HTSSOP-20 Exposed Pad
externally adjustable soft-start circuit. Fault detection
Package
and
supply
sequencing
are
possible
with
the
integrated power good circuit.
APPLICATIONS
The LM21215A-1 is designed to work well in multi-rail
Broadband, Networking and Wireless
power supply architectures. The output voltage of the
Communications
device can be configured to track an external voltage
High-performance FPGAs, ASICs and
rail using the SS/TRK pin. The switching frequency
Microprocessors
can be synchronized to the falling edge of a clock
between frequencies of 300kHz to 1.5MHz.
Simple to Design, High Efficiency Point of
Load Regulation from a 5V or 3.3V Bus
If the output is pre-biased at startup, it will not sink
current, allowing the output to smoothly rise past the
pre-biased voltage. The regulator is offered in a 20-
pin HTSSOP package with an exposed pad that can
be soldered to the PCB, eliminating the need for
bulky heatsinks.
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
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2011–2013, 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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