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LMR50410 ACTIVE SIMPLE SWITCHER 4-V to 36-V, 1-A synchronous step-down converter SOT23 packaging, FPWM and PFM option

Product details

Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 24 Iout (Max) (A) 1 Iq (Typ) (uA) 24 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 1400 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 24 Iout (Max) (A) 1 Iq (Typ) (uA) 24 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 1400 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • Configured for rugged industrial applications
    • Input voltage range: 3.8 V to 36 V
    • Output voltage range: 1 V to 24 V
    • Peak-current mode control
    • Junction temperature range –40°C to +125°C
    • Ease of use SOIC package
  • Well-suited for scalable industrial power supplies
    • Pin compatible with:
    • 400-kHz and 1.4-MHz frequency
    • Integrated compensation helps reduce solution size, cost, and design complexity
  • High-efficiency solution
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 25 µA
  • Flexible system interface
    • Power-good flag and precision enable
  • Create a custom design using the LMR33610 with the WEBENCH® Power Designer
  • Configured for rugged industrial applications
    • Input voltage range: 3.8 V to 36 V
    • Output voltage range: 1 V to 24 V
    • Peak-current mode control
    • Junction temperature range –40°C to +125°C
    • Ease of use SOIC package
  • Well-suited for scalable industrial power supplies
    • Pin compatible with:
    • 400-kHz and 1.4-MHz frequency
    • Integrated compensation helps reduce solution size, cost, and design complexity
  • High-efficiency solution
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 25 µA
  • Flexible system interface
    • Power-good flag and precision enable
  • Create a custom design using the LMR33610 with the WEBENCH® Power Designer

The LMR33610 SIMPLE SWITCHER® regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33610 drives up to 1 A of load current from an input of up to 36 V. The LMR33610 provides high light-load efficiency and output accuracy. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33640 automatically folds back frequency at light load to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR33610 is pin-to-pin compatible with the LMR33620, LMR33630, LMR33640 (36 V, 2A/3 A/4 A) and LMR36510 (65 V, 1 A) and LMR36520 (65 V, 2 A), completing the family of scalable SIMPLE SWITCHER power supplies. This minimizes the cost and effort associated with board layout modifications. The LMR33610 is available in an 8-pin HSOIC package.

The LMR33610 SIMPLE SWITCHER® regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33610 drives up to 1 A of load current from an input of up to 36 V. The LMR33610 provides high light-load efficiency and output accuracy. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33640 automatically folds back frequency at light load to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR33610 is pin-to-pin compatible with the LMR33620, LMR33630, LMR33640 (36 V, 2A/3 A/4 A) and LMR36510 (65 V, 1 A) and LMR36520 (65 V, 2 A), completing the family of scalable SIMPLE SWITCHER power supplies. This minimizes the cost and effort associated with board layout modifications. The LMR33610 is available in an 8-pin HSOIC package.

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Technical documentation

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Type Title Date
* Data sheet LMR33610 SIMPLE SWITCHER 3.8-V to 36-V, 1-A Synchronous Step-down Converter datasheet 09 Jul 2019
Functional safety information LMR336x0 Functional Safety, FIT Rate, FMD and Pin FMA (Rev. A) 02 Mar 2021
Technical article 3 tips when designing a power stage for servo and AC drives 20 Nov 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article How to increase system reliability and simplify design using DC/DC converters 13 Jun 2016
Technical article Advantages of leaded packages in robust industrial designs 08 Mar 2016

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LMR33640D PSpice Unencrypted Transient Model

SNVMBV1.ZIP (172 KB) - PSpice Model
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