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LMR51425

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36V 2.5A synchronous buck converter with low Iq

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Data sheet

LMR51425

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2.5 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features EMI Tested, Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 38 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2.5 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features EMI Tested, Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 38 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
WSON (DRR) 12 9 mm² 3 x 3
  • Functional Safety-Capable
  • Configured for rugged industrial applications:
    • Wide input voltage range: 4V to 36V
    • Continuous output current: 2.5A or 3.5A
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75ns (typical)
    • Low quiescent current: 25µA
    • Adjustable frequency: 200kHz to 1.1MHz
    • Frequency spread spectrum
    • Protection features:
      • Precision enable input
      • Open-drain PGOOD
      • VIN undervoltage lockout (UVLO)
      • Cycle-by-cycle current limiting
      • Short-circuit protection with hiccup mode
      • Thermal shutdown
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • PFM and FPWM options in pin-to-pin compatible package
  • Create a custom design using the LMR514x5 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications:
    • Wide input voltage range: 4V to 36V
    • Continuous output current: 2.5A or 3.5A
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75ns (typical)
    • Low quiescent current: 25µA
    • Adjustable frequency: 200kHz to 1.1MHz
    • Frequency spread spectrum
    • Protection features:
      • Precision enable input
      • Open-drain PGOOD
      • VIN undervoltage lockout (UVLO)
      • Cycle-by-cycle current limiting
      • Short-circuit protection with hiccup mode
      • Thermal shutdown
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • PFM and FPWM options in pin-to-pin compatible package
  • Create a custom design using the LMR514x5 with the WEBENCH Power Designer

The LMR514x5 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 2.5A or 3.5A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x5 features adjustable switching frequency from 200kHz to 1.1MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has pulse frequency modulation (PFM version) to realize high efficiency at light load, and forced pulse width modulation (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 LMR514x5 is available in a WSON-12 package.

The LMR514x5 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 2.5A or 3.5A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x5 features adjustable switching frequency from 200kHz to 1.1MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has pulse frequency modulation (PFM version) to realize high efficiency at light load, and forced pulse width modulation (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 LMR514x5 is available in a WSON-12 package.
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Type Title Date
* Data sheet LMR514x5 36V, 2.5A / 3.5A , Synchronous Buck Converter With Low IQ datasheet PDF | HTML 26 Sep 2024
Functional safety information LMR51425 and LMR51435 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 13 Aug 2024

Design & development

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Evaluation board

LMR51450EVM — LMR51450 synchronous step-down converter evaluation module

The LMR51450 evaluation module (EVM) is designed to help customers evaluate the performance of the LMR51450 synchronous step-down voltage converter. This EVM implements the LMR51450 in a 12-pin WSON Package. The EVM is capable of delivering 5 V or 3.3 V output voltage and up to 5 A load current (...)
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WSON (DRR) 12 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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