LMR50410
LMR50410
www.ti.com
SLUSDW3A – APRIL 2020 – REVISED NOVEMBER 2020
SLUSDW3A – APRIL 2020 – REVISED NOVEMBER 2020
LMR50410 SIMPLE SWITCHER® 4-V to 36-V, 1-A Buck Converter in SOT-23-6 Package
1 Features
2 Applications
•
•
Functional Safety-Capable
– Documentation available to aid functional safety
system design
•
•
•
•
Major appliances
PLC, DCS, and PAC
Smart meters
General purpose wide VIN power supplies
Configured for rugged industrial applications
– Input voltage range: 4 V to 36 V
– 1-A continuous output current
– Minimum switching-on time: 60 ns
– 700-kHz fixed switching frequency
– Junction temperature range: –40°C to 150°C
– 98% maximum duty cycle
– Monotonic start-up with pre-biased output
– Internal short circuit protection with hiccup
mode
– ±1% tolerance voltage reference
– Precision enable
Small solution size and ease of use
– Integrated synchronous rectification
– Internal compensation for ease of use
– SOT-23-6 package
Pin-to-pin compatible with LMR14010Aand
TPS560430
Various options in pin-to-pin compatible package
– PFM and forced PWM (FPWM) options
Create a custom design using the LMR50410 with
the WEBENCH® Power Designer
3 Description
The LMR50410 is
a
wide-V
,
IN
easy-to-use
synchronous buck converter capable of driving up to
1-A load current. With a wide input range of 4 V to 36
V, the device is suitable for a wide range of industrial
applications for power conditioning from an
unregulated source.
The LMR50410 operates at 700-kHz switching
frequency to support use of relatively small inductors
for an optimized solution size. It has an PFM version
to realize high efficiency at light load and FPWM
version to achieve constant frequency, and small
output voltage ripple over the full load range. Soft-
start and compensation circuits are implemented
internally which allows the device to be used with
minimum external components.
•
•
•
•
The device has built-in protection features, such as
cycle-by-cycle current limit, hiccup mode short-circuit
protection, and thermal shutdown in case of excessive
power dissipation. The LMR50410 is available in
SOT-23-6 package.
Device Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
LMR50410
SOT-23-6
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
100
90
VIN up to 36 V
CB
VIN
80
CIN
CBOOT
70
L
VOUT
60
50
40
30
20
10
SW
FB
EN
RFBT
PFM, VIN=8V
PFM,VIN=12V
PFM, VIN=24V
PFM, VIN=36V
FPWM, VIN=8V
FPWM,VIN=12V
FPWM, VIN=24V
FPWM, VIN=36V
GND
COUT
RFBB
0
0.0001
0.001
0.01
IOUT(A)
0.05
0.2 0.5
1
2
Simplified Schematic
Efficiency versus Output Current VOUT = 5 V,
700kHz
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Product Folder Links: LMR50410
Copyright © 2020 Texas Instruments Incorporated
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