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LM20125 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM20125
Spiegazioni elettronici  LM20125/LM20125Q 5A, 500kHz PowerWise짰 Synchronous Buck Regulator
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

LM20125 Scheda tecnica(HTML) 1 Page - Texas Instruments

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PVIN
SW
AGND
FB
PGOOD
EN
SS/TRK
AVIN
COMP
LM20125
L
RF
VCC
PGND
CIN
RC1
CC1
VIN
CSS
CVCC
COUT
VOUT
RFB2
RFB1
CF
(optional)
LM20125
www.ti.com
SNVS525E – OCTOBER 2007 – REVISED MARCH 2013
LM20125/LM20125Q 5A, 500kHz PowerWise® Synchronous Buck Regulator
Check for Samples: LM20125
1
FEATURES
DESCRIPTION
The LM20125 is a full featured 500 kHz synchronous
2
LM20125Q is AEC-Q100 Qualified and
buck regulator capable of delivering up to 5A of
Manufactured on an Automotive Grade Flow
continuous output current. The current mode control
Input Voltage Range 2.95V to 5.5V
loop can be compensated to be stable with virtually
Accurate Current Limit Minimizes Inductor
any type of output capacitor. For most cases,
compensating the device only requires two external
Size
components, providing maximum flexibility and ease
97% Efficiency with 500 kHz Switching
of use. The device is optimized to work over the input
Frequency
voltage range of 2.95V to 5.5V making it suited for a
32 m
Ω Integrated FET Switches
wide variety of low voltage systems.
Starts up into Pre-Biased Loads
The device features internal over voltage protection
Output Voltage Tracking
(OVP) and over current protection (OCP) circuits for
increased system reliability. A precision enable pin
Peak Current Mode Control
and integrated UVLO allows the turn-on of the device
Adjustable Output Voltage Down to 0.8V
to be tightly controlled and sequenced. Start-up
Adjustable Soft-Start with External Capacitor
inrush currents are limited by both an internally fixed
and externally adjustable Soft-Start circuit. Fault
Precision Enable Pin with Hysteresis
detection and supply sequencing is possible with the
Integrated OVP, UVLO, Power Good and
integrated power good circuit.
Thermal Shutdown
The LM20125 is designed to work well in multi-rail
HTSSOP 16-Pin Exposed Pad Package
power supply architectures. The output voltage of the
device can be configured to track a higher voltage rail
APPLICATIONS
using the SS/TRK pin. If the output of the LM20125 is
Simple to Design, High Efficiency Point of
pre-biased at startup it will not sink current to pull the
Load Regulation from a 5V or 3.3V Bus
output low until the internal soft-start ramp exceeds
the voltage at the feedback pin.
High Performance DSPs, FPGAs, ASICs and
Microprocessors
The LM20125 is offered in a 16-pin HTSSOP
package with an exposed pad that can be soldered to
Broadband, Networking and Optical
the PCB, eliminating the need for bulky heatsinks.
Communications Infrastructure
TYPICAL APPLICATION CIRCUIT
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 © 2007–2013, 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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