Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)
NEW

LMR43620

ACTIVE

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

Product details

Vin (min) (V) 3 Vin (max) (V) 36 Vout (min) (V) 1 Vout (max) (V) 32 Iout (max) (A) 2 Iq (typ) (mA) 0.0015 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 Operating temperature range (°C) -40 to 150 Rating Catalog TI functional safety category Functional Safety-Capable Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
Vin (min) (V) 3 Vin (max) (V) 36 Vout (min) (V) 1 Vout (max) (V) 32 Iout (max) (A) 2 Iq (typ) (mA) 0.0015 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 Operating temperature range (°C) -40 to 150 Rating Catalog TI functional safety category Functional Safety-Capable Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
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.

Download View video with transcript Video

Technical documentation

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 tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
VQFN-HR (RPE) 9 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos