LMR51420

Name: LMR51420
Brand: TI
SKU: LMR51420
Price: 0.4 USD

ACTIVE

SIMPLE SWITCHER® power converter 4.5-V to 36-V, 2-A, synchronous buck with 40-µA IQ

Order now

Data sheet

document-pdfAcrobat LMR51420 SIMPLE SWITCHER® Power Converter 4.5-V to 36-V, 2-A, Synchronous Buck datasheet (Rev. C)

LMR51420

ACTIVE

Data sheet

Order now

Product details

Iout (max) (A)

2

Vin (min) (V)

4.5

Vin (max) (V)

36

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

500

Switching frequency (max) (kHz)

1100

Features

Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification

Control mode

current mode

Vout (min) (V)

0.6

Vout (max) (V)

34.2

Rating

Catalog

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.00004

Iout (max) (A)

2

Vin (min) (V)

4.5

Vin (max) (V)

36

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

500

Switching frequency (max) (kHz)

1100

Features

Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification

Control mode

current mode

Vout (min) (V)

0.6

Vout (max) (V)

34.2

Rating

Catalog

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.00004

SOT-23-THN (DDC)

6

8.12 mm² 2.9 x 2.8

Functional Safety-Capable
- Documentation available to aid functional safety system design
Configured for rugged industrial applications
- 4.5-V to 36-V input voltage range
- 2-A continuous output current
- 70-ns minimum switching on time
- 500-kHz and 1.1-MHz fixed switching frequency options
- –40°C to 150°C junction temperature range
- 98% maximum duty cycle
- Start-up with prebiased output
- Internal short circuit protection with hiccup mode
- ±1.5% tolerance voltage reference
- Precision enable
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 TPS54202 and TPS54302
PFM and forced PWM (FPWM) options available
Create a custom design using the LMR51420 with the WEBENCH Power Designer

Functional Safety-Capable
- Documentation available to aid functional safety system design
Configured for rugged industrial applications
- 4.5-V to 36-V input voltage range
- 2-A continuous output current
- 70-ns minimum switching on time
- 500-kHz and 1.1-MHz fixed switching frequency options
- –40°C to 150°C junction temperature range
- 98% maximum duty cycle
- Start-up with prebiased output
- Internal short circuit protection with hiccup mode
- ±1.5% tolerance voltage reference
- Precision enable
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 TPS54202 and TPS54302
PFM and forced PWM (FPWM) options available
Create a custom design using the LMR51420 with the WEBENCH Power Designer

The LMR51420 is a wide-V_IN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 2-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51420 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a 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 LMR51420 is available in a 6-pin SOT-23 package.

The LMR51420 is a wide-V_IN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 2-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51420 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a 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 LMR51420 is available in a 6-pin SOT-23 package.

open-in-new

Find other AC/DC & DC/DC converters (integrated FET)

Download View video with transcript Video

Technical documentation

star

=Top documentation for this product selected by TI

No results found. Please clear your search and try again.

View all 3

	Type	Title		Date
*	Data sheet	LMR51420 SIMPLE SWITCHER® Power Converter 4.5-V to 36-V, 2-A, Synchronous Buck datasheet (Rev. C)		23 Nov 2022
	Functional safety information	LMR514x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	15 Oct 2021
	User guide	LMR51420EVM User's Guide	PDF \| HTML	13 Oct 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMR51420EVM — LMR51420 evaluation module 4.5-V to 36-V, 2-A synchronous step-down converter

The LMR51420EVM is a fully assembled and tested circuit for evaluating the LMR51420 step-down converter. The board is set as a 5-V Vout. The board also has AC signal injection terminals for loop measurements.

User guide: PDF | HTML