LMR43620

ACTIVE

3-V to 36-V, 2-A low-EMI synchronous buck regulator with low IQ

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode current mode Vout (min) (V) 1 Vout (max) (V) 32 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode current mode Vout (min) (V) 1 Vout (max) (V) 32 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98
VQFN-HR (RPE) 9 4 mm² 2 x 2
  • Functional Safety-Capable
  • Miniature solution size and low component cost
    • 2-mm × 2-mm HotRod™ package with wettable flanks
    • Internal compensation
  • Optimized for ultra-low EMI requirements
    • Pin selectable FPWM mode for constant frequency at light loads with MODE/SYNC pin
    • F SW synchronization with MODE/SYNC pin
  • Designed for industrial applications
    • –40°C to +150°C junction temperature range
    • Supports 42-V transients
    • Supports 3-V IN minimum
    • Adjustable up to 95% of V IN, 3.3-V and 5-V fixed V OUT options available
  • Greater than 85% efficiency at 1 mA
    • 1.3-µA I Q at 24 V IN, 5 V OUT (fixed)
  • Designed for scalable power supplies
    • 200 kHz to 2.2 MHz (RT pin) adjustable F SW
    • Pin compatible with:
  • Functional Safety-Capable
  • Miniature solution size and low component cost
    • 2-mm × 2-mm HotRod™ package with wettable flanks
    • Internal compensation
  • Optimized for ultra-low EMI requirements
    • Pin selectable FPWM mode for constant frequency at light loads with MODE/SYNC pin
    • F SW synchronization with MODE/SYNC pin
  • Designed for industrial applications
    • –40°C to +150°C junction temperature range
    • Supports 42-V transients
    • Supports 3-V IN minimum
    • Adjustable up to 95% of V IN, 3.3-V and 5-V fixed V OUT options available
  • Greater than 85% efficiency at 1 mA
    • 1.3-µA I Q at 24 V IN, 5 V OUT (fixed)
  • Designed for scalable power supplies
    • 200 kHz to 2.2 MHz (RT pin) adjustable F SW
    • Pin compatible with:

The LMR436x0 is the industry smallest 36-V, 2-A, and 1-A synchronous step-down DC/DC converters in a 2-mm × 2-mm HotRod package. This easy-to-use converter supports a wide input voltage range of 3.0 V to 36 V with transients up to 42 V.

The control architecture and feature-set are optimized for an ultra-small solution size. The device uses peak current mode control to minimize output capacitance. The LMR436x0 minimizes input filter size by using dual random spread spectrum, a low-EMI HotRod package, and an optimized pinout. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands.

The compact solution size and rich feature set of LMR436x0 simplifies implementation for a wide range of industrial applications.

The LMR436x0 is the industry smallest 36-V, 2-A, and 1-A synchronous step-down DC/DC converters in a 2-mm × 2-mm HotRod package. This easy-to-use converter supports a wide input voltage range of 3.0 V to 36 V with transients up to 42 V.

The control architecture and feature-set are optimized for an ultra-small solution size. The device uses peak current mode control to minimize output capacitance. The LMR436x0 minimizes input filter size by using dual random spread spectrum, a low-EMI HotRod package, and an optimized pinout. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands.

The compact solution size and rich feature set of LMR436x0 simplifies implementation for a wide range of industrial applications.

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Technical documentation

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* Data sheet LMR436x0, 36-V, 1-A/2-A Buck Converter with < 2.5 µA IQ at 150°C TJMAX in 4-mm2 HotRod™ QFN datasheet (Rev. B) PDF | HTML 04 May 2023
White paper 克服低功耗應用中的低 IQ 挑戰 (Rev. B) PDF | HTML 19 Apr 2023
White paper 저전력 애플리케이션의 저 IQ 문제점 극복 (Rev. B) PDF | HTML 19 Apr 2023
White paper Overcoming Low-IQ Challenges in Low-Power Applications (Rev. B) PDF | HTML 12 Apr 2023
Application note EMI 감소 기법, 듀얼 랜덤 확산 스펙트럼 (Rev. A) PDF | HTML 21 Nov 2022
Application note EMI Reduction Technique, Dual Random Spread Spectrum (Rev. A) 19 Oct 2022
Functional safety information LMR436x0/LMR436x0-Q1 Functional Safety, FIT Rate, FMD and Pin FMA PDF | HTML 18 Mar 2022
Technical article Lowering audible noise in automotive applications with TI’s DRSS technology PDF | HTML 18 Mar 2021

Design & development

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

Evaluation board

LMR43620MQ3EVM-2M — LMR43620-Q1 36-V input, 3.3-V output, 2-A synchronous step-down converter evaluation module

The LMR43620MQ3EVM-2M evaluation module (EVM) helps designers evaluate the operation and performance of the LMR43620-Q1 wide-input buck regulator. The LMR43620-Q1 is an easy-to-use synchronous step-down DC/DC converter capable of driving up to 2 A of load current from an input voltage of up to 36 (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

LMR43620RQ5EVM-400 — LMR43620-Q1 36-V input, 5-V output, 2-A synchronous step-down converter evaluation module

The LMR43620RQ5EVM-400 evaluation module (EVM) helps evaluate the operation and performance of the LMR43620-Q1 wide-input buck regulator. The LMR43620-Q1 is an easy-to-use synchronous step-down DC/DC converter capable of driving up to 2 A of load current from an input voltage of up to 36 V. The (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

LMR43620MSC3-Q1 PSpice Transient Model

SNVMC98.ZIP (315 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RPE) 9 Ultra Librarian

Ordering & quality

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