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LMR43606-Q1

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Automotive, 36V, 600mA synchronous step-down converter with 4uA IQ and high light load efficiency

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Data sheet

LMR43606-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 0.6 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, Spread Spectrum, Synchronous Rectification, UVLO Fixed, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 32 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 99
Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 0.6 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, Spread Spectrum, Synchronous Rectification, UVLO Fixed, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 32 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 99
VQFN-HR (RPE) 9 4 mm² 2 x 2
  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Greater than 85% efficiency at 1mA
  • Miniature design size and low component cost
    • 2mm × 2mm HotRod™ package with wettable flanks
    • Internal compensation
  • Designed for ultra-low EMI requirements
    • Spread spectrum reduces peak emissions
    • Pin selectable FPWM mode for constant frequency at light loads with MODE/SYNC pin
    • FSW synchronization with MODE/SYNC pin
  • Designed for automotive applications
    • –40°C to +150°C junction temperature range
    • Supports 42V automotive load dump
    • Supports 3-VIN for automotive cold crank
    • Adjustable up to 95% of VIN, 3.3V and 5V fixed VOUT options available
  • Designed for scalable power supplies
  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Greater than 85% efficiency at 1mA
  • Miniature design size and low component cost
    • 2mm × 2mm HotRod™ package with wettable flanks
    • Internal compensation
  • Designed for ultra-low EMI requirements
    • Spread spectrum reduces peak emissions
    • Pin selectable FPWM mode for constant frequency at light loads with MODE/SYNC pin
    • FSW synchronization with MODE/SYNC pin
  • Designed for automotive applications
    • –40°C to +150°C junction temperature range
    • Supports 42V automotive load dump
    • Supports 3-VIN for automotive cold crank
    • Adjustable up to 95% of VIN, 3.3V and 5V fixed VOUT options available
  • Designed for scalable power supplies

The LMR43606-Q1 is a small, 36V, 0.6A, synchronous step-down DC/DC converter in a 2mm × 2mm HotRod package. This easy-to-use converter supports a wide input voltage range of 3.0V to 36V with transients up to 42V.

The LMR43606-Q1 is specifically designed to meet low standby power requirements for always on, automotive applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances provide exceptional efficiency across the entire load range.

The control architecture and feature-set are designed for an ultra-small design size. The device uses peak current mode control to minimize output capacitance. The LMR43606-Q1 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 200kHz and 2.2MHz to avoid noise sensitive frequency bands.

The rich feature set of the LMR43606-Q1 is designed to simplify implementation for a wide range of automotive end equipments.

The LMR43606-Q1 is a small, 36V, 0.6A, synchronous step-down DC/DC converter in a 2mm × 2mm HotRod package. This easy-to-use converter supports a wide input voltage range of 3.0V to 36V with transients up to 42V.

The LMR43606-Q1 is specifically designed to meet low standby power requirements for always on, automotive applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances provide exceptional efficiency across the entire load range.

The control architecture and feature-set are designed for an ultra-small design size. The device uses peak current mode control to minimize output capacitance. The LMR43606-Q1 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 200kHz and 2.2MHz to avoid noise sensitive frequency bands.

The rich feature set of the LMR43606-Q1 is designed to simplify implementation for a wide range of automotive end equipments.
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Type Title Date
* Data sheet LMR43606-Q1, 36V, 0.6A, Automotive Buck Converter With < 2.5µA IQ at 150°C TJMAX in 4mm2 HotRod™ QFN datasheet PDF | HTML 12 Jan 2024
Application brief Discrete Power Design for C2000™ PDF | HTML 15 Aug 2024
EVM User's guide LMR43606-Q1 Evaluation Module User's Guide PDF | HTML 18 Mar 2024
Certificate LMR43606MQ3EVM-2M EU Declaration of Conformity (DoC) 06 Mar 2024
Functional safety information LMR43606-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 16 Jan 2024

Design & development

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

Evaluation board

LMR43606MQ3EVM-2M — LMR43606-Q1 evaluation module

The LMR43606-Q1 is an easy-to-use, synchronous, step-down voltage converter. The LMR43606MQ3EVM-2M is a fully assembled and tested circuit for evaluating the LMR43606-Q1 converter. This EVM is designed to be operated with a 3.5V to 36V input and provides a 3.3V output with a load up to 600mA.

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