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LMR51635

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SIMPLE SWITCHER® synchronous buck converter with 4.3V-to-60V, 3.5A and low quiescent current

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Data sheet

LMR51635

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Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter (Integrated Switch) Iout (max) (A) 3.5 Vin (min) (V) 4.3 Vin (max) (V) 60 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 30 Iq (typ) (µA) 26
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter (Integrated Switch) Iout (max) (A) 3.5 Vin (min) (V) 4.3 Vin (max) (V) 60 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 30 Iq (typ) (µA) 26
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • Configured for rugged industrial applications:
    • 4.3V to 60V input voltage range
    • 3.5A continuous output current
    • 75ns minimum switching on time
    • 400kHz switching frequency
    • Frequency spread spectrum (PFM variant)
    • –40°C to 150°C junction temperature range
    • 96% maximum duty cycle
    • Monotonic start-up with prebiased output
    • Short-circuit protection with hiccup mode
    • Precision enable
    • ±1% tolerance voltage reference at room temperature
  • Small design size and ease of use:
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package

  • Create a custom design using the LMR51635 with the with the WEBENCH Power Designer
  • Configured for rugged industrial applications:
    • 4.3V to 60V input voltage range
    • 3.5A continuous output current
    • 75ns minimum switching on time
    • 400kHz switching frequency
    • Frequency spread spectrum (PFM variant)
    • –40°C to 150°C junction temperature range
    • 96% maximum duty cycle
    • Monotonic start-up with prebiased output
    • Short-circuit protection with hiccup mode
    • Precision enable
    • ±1% tolerance voltage reference at room temperature
  • Small design size and ease of use:
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package

  • Create a custom design using the LMR51635 with the with the WEBENCH Power Designer

The LMR51635 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 3.5A load current. With a wide input range of 4.3V to 60V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51635 operates at 400kHz switching frequency to support use of relatively small inductors for an optimized design size. The device has pulse frequency modulation (PFM version) to realize high efficiency at light load. 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.

The LMR51635 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 3.5A load current. With a wide input range of 4.3V to 60V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51635 operates at 400kHz switching frequency to support use of relatively small inductors for an optimized design size. The device has pulse frequency modulation (PFM version) to realize high efficiency at light load. 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.
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* Data sheet LMR51635 4.3V to 60V, 3.5A, Synchronous Buck Converter in a SOT-23 Package datasheet PDF | HTML 21 Aug 2024
Functional safety information LMR51625 and LMR51635 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 15 Oct 2024
EVM User's guide LMR51635 Buck Evaluation Module PDF | HTML 13 Aug 2024

Design & development

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Evaluation board

LMR51635EVM — LMR51635 evaluation module

The Texas Instruments LMR51635EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMR51635 wide-input synchronous buck regulator. The LMR51635 is a wide-VIN, easy-to-use synchronous buck converter. With the wide operating input voltage range of 4.3V to 60V, the (...)

User guide: PDF | HTML
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SOT-23-THN (DDC) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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