LMR54410
SIMPLE SWITCHER® power converter 4.5-V to 36-V, 1-A, synchronous buck with 80-µA IQ
LMR54410
- Functional Safety-Capable
- Configured for rugged industrial applications
- 4-V to 36-V input voltage range
- Withstands up to 50-V short VIN transient
- 0.6-A/1-A continuous output current
- 60-ns minimum switching on time
- 1.1-MHz fixed switching frequency
- –40°C to 150°C junction temperature range
- 98% maximum duty cycle
- Monotonic start-up with pre-biased output
- Short circuit protection with hiccup mode
- Precision enable
- ±1% tolerance voltage reference
- Small solution size and ease of use
- Integrated synchronous rectification
- Internal compensation for ease of use
- SOT-23 package
- Pin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430
- Various options in pin-to-pin compatible package
- PFM and forced PWM (FPWM) options
The LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1-A and 0.6-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 LMR544xx operates at 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. It has a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | LMR544xx SIMPLE SWITCHER® 4-V to 45-V, 0.6-A/1-A Buck Converter in a SOT-23 Package datasheet (Rev. B) | PDF | HTML | 15 Feb 2022 |
Certificate | LMR54410EVM EU RoHS Declaration of Conformity (DoC) | 16 Nov 2021 | ||
User guide | LMR54410EVM User's Guide | PDF | HTML | 15 Oct 2021 | |
Functional safety information | LMR544xx Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 15 Oct 2021 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
LMR50410EVM — 4-V to 36-V, 1-A synchronous step-down converter evaluation module
LMR54410EVM — LMR54410 evaluation module with 4-V to 36-V, 1-A synchronous step-down converter
The LMR54410EVM is a fully assembled and tested circuit for evaluating the LMR54410 step-down converter. The board has a jumper connector to enable pin and could provide pull up device to VIN or external high level enable. The board is set as a 3.3-V-Vout. The board also has AC signal injection (...)
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
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Package | Pins | Download |
---|---|---|
SOT-23 (DBV) | 6 | View options |
Ordering & quality
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- Lead finish/Ball material
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- Ongoing reliability monitoring
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