Texas Instruments 36V, 2A PowerWise® Adjustable Frequency Synchronous Buck Regulator Evaluation Module LM20242EVAL/NOPB LM20242EVAL/NOPB Datenbogen
Produktcode
LM20242EVAL/NOPB
C
IN
VIN
SW
AGND
FB
PGOOD
V
OUT
R
FB1
R
FB2
C
OUT
EN
SS/TRK
VCC
C
VCC
C
C1
COMP
R
C1
V
IN
LM20242
RT
R
RT
BOOT
GND
L
SNVS534E – OCTOBER 2007 – REVISED MARCH 2013
LM20242 36V, 2A PowerWise
®
Adjustable Frequency Synchronous Buck Regulator
Check for Samples:
1
FEATURES
DESCRIPTION
The LM20242 is a full featured 1MHz capable
23
•
2A Output Current, 3.7A Peak Current
synchronous buck regulator capable of delivering up
•
130 m
Ω
/110 m
Ω
Integrated Power MOSFETs
to 2A of load current. The current mode control loop
•
1.5% Output Voltage Accuracy
is externally compensated with only two external
components, offering both high performance and
components, offering both high performance and
•
Current Mode Control, Selectable
ease of use. The device is optimized to work over the
Compensation
input voltage range of 4.5V to 36V making it well
•
Resistor Programmed, 1MHz Capable
suited for high voltage systems.
Oscillator
The device features internal Over Voltage Protection
•
Synchronous Rectifier with Diode Emulation
(OVP) and Over Current Protection (OCP) circuits for
•
Adjustable Output Voltage Down to 0.8V
increased system reliability. A precision Enable pin
and integrated UVLO allows the turn on of the device
and integrated UVLO allows the turn on of the device
•
Compatible with Pre-Biased Loads
to be tightly controlled and sequenced. Startup inrush
•
Programmable Soft-Start With External
currents are limited by both an internally fixed and
Capacitor
externally adjustable soft-start circuit. Fault detection
•
Precision Enable Pin with Hysteresis
and
supply
sequencing
are
possible
with
the
integrated PGOOD circuit.
•
OVP, UVLO Inputs and PGOOD Output
•
Internally Protected with Peak Current Limit,
The LM20242 is designed to work well in multi-rail
Thermal Shutdown and Restart
power supply architectures. The output voltage of the
device can be configured to track a higher voltage rail
device can be configured to track a higher voltage rail
•
Accurate Current Limit with Frequency
using the SS/TRK pin. If the output of the LM20242 is
Foldback
pre-biased at startup it will not sink current to pull the
•
Non-Linear Current Mode Slope Compensation
output low until the internal soft-start ramp exceeds
•
HTSSOP Exposed Pad Package
the voltage at the feedback pin.
The LM20242 is offered in an exposed pad 20 pin
APPLICATIONS
HTSSOP package that can be soldered to the PCB,
eliminating the need for bulky heatsinks.
eliminating the need for bulky heatsinks.
•
Simple to Design, High Efficiency Point of
Load Regulation from a 4.5V to 36V Bus
Load Regulation from a 4.5V to 36V Bus
•
High Performance DSPs, FPGAs, ASICs and
Microprocessors
Microprocessors
•
Communications Infrastructure, Automotive
Simplified 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.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
PowerWise is a registered trademark of Deere and Company.
3
All other 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.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.