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LMR33630-Q1

ACTIVE

3.8-V to 36-V, 3-A synchronous step-down voltage converter

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Data sheet

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LMQ66430-Q1 ACTIVE Automotive 36-V, 3-A low EMI synchronous step-down converter with 1.5-µA IQ Newer device with lower quiescent current and pinFMEA.

LMR33630-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3.8 Vout (max) (V) 34 Vout (min) (V) 1 Features Enable, Fixed soft start, Light-load efficiency, Overcurrent protection, Power good, Synchronous rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000024 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
Rating Automotive Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3.8 Vout (max) (V) 34 Vout (min) (V) 1 Features Enable, Fixed soft start, Light-load efficiency, Overcurrent protection, Power good, Synchronous rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000024 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
VQFN-HR (RNX) 12 6 mm² (3 mm × 2 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • Input voltage range: 3.8 V to 36 V
    • Output voltage range: 1 V to 24 V
    • Output current: 3 A
    • 75-mΩ/50-mΩ RDS-ON power MOSFETs
    • Peak-current-mode control
    • Short minimum on-time of 68 ns
    • Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
    • Integrated compensation network
  • Low EMI and switching noise
    • HotRod™ package
    • Parallel input current paths
  • High power conversion at all loads
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 25 µA
  • Create a custom design using the LMR33630-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • Input voltage range: 3.8 V to 36 V
    • Output voltage range: 1 V to 24 V
    • Output current: 3 A
    • 75-mΩ/50-mΩ RDS-ON power MOSFETs
    • Peak-current-mode control
    • Short minimum on-time of 68 ns
    • Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
    • Integrated compensation network
  • Low EMI and switching noise
    • HotRod™ package
    • Parallel input current paths
  • High power conversion at all loads
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 25 µA
  • Create a custom design using the LMR33630-Q1 with the WEBENCH Power Designer

The LMR33630-Q1 automotive-qualified regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged applications. The LMR33630-Q1 drives up to 3 A of load current from an input of up to 36 V. The LMR33630-Q1 provides high light load efficiency and output accuracy in a very small solution size. 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 LMR33630-Q1 automatically folds back frequency at light load to improve efficiency. Integration eliminates most external components and provides a pinout designed for simple PCB layout. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. The LMR33630-Q1 is available in a 12-pin 3 mm × 2 mm next generation VQFN package with wettable flanks.

The LMR33630-Q1 automotive-qualified regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged applications. The LMR33630-Q1 drives up to 3 A of load current from an input of up to 36 V. The LMR33630-Q1 provides high light load efficiency and output accuracy in a very small solution size. 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 LMR33630-Q1 automatically folds back frequency at light load to improve efficiency. Integration eliminates most external components and provides a pinout designed for simple PCB layout. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. The LMR33630-Q1 is available in a 12-pin 3 mm × 2 mm next generation VQFN package with wettable flanks.

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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LMR33630-Q1 3.8-V to 36-V, 3-A Synchronous Step-Down Voltage Converter datasheet (Rev. C) PDF | HTML Oct 15, 2020
Functional safety information LMR336x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. C) PDF | HTML Mar 22, 2024
White paper Time-Saving and Cost-Effective Innovations for EMI Reduction (Rev. A) PDF | HTML Nov 28, 2023
White paper Demystifying Input Supply Current in DC/DC Regulators:From Shutdown to Full Load (Rev. A) PDF | HTML Jun 6, 2023
Application note Working with Inverting Buck-Boost Converters (Rev. B) PDF | HTML Oct 18, 2022
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators Apr 21, 2021
Application note PCB Thermal Design Tips for Automotive DC/DC Converters PDF | HTML Nov 12, 2020
Technical article How device-level features and package options can help minimize EMI in automotive PDF | HTML Aug 21, 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML Dec 11, 2019
Technical article How semiconductor technologies are changing automotive lighting roadmaps PDF | HTML Oct 24, 2019
Application note Understanding Mode Transitions for LMR33620/30 and LMR36006/15 Apr 4, 2019
Technical article How a DC/DC converter package and pinout design can enhance automotive EMI perform PDF | HTML Sep 4, 2018

Design & development

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Evaluation board

LMR33630ADDAEVM — LMR33630 Synchronous Step-Down Converter Evaluation Module

The LMR33630ADDAEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630 synchronous step-down converter.  The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.
User guide: PDF
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Evaluation board

LMR33630ARNXEVM — LMR33630 Synchronous Step Down Converter Evaluation Module

The LMR33630 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630A 400kHz synchronous step-down converter.  The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.
User guide: PDF
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Evaluation board

LMR33630CDDAEVM — LMR33630 Synchronous Step-Down Converter Evaluation Module

The LMR33630 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630 synchronous step-down converter.  The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.
User guide: PDF
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Evaluation board

LMR33630CRNXEVM — LMR33630 Synchronous Step Down Converter Evaluation Module

The LMR33630 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630C 2.1MHz synchronous step-down converter.  The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.
User guide: PDF
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Calculation tool

SNVC234 — Mode Transitions Calculator LMR336x0 LMR360xx

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Calculation tool

SNVR484 — LMR336x0 Component Calculator

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Reference design

TIDA-01628 — Reference design for automotive cluster driver notification functions

This reference design implements power and driver notification functions typically found in an automotive instrument cluster. The design features reverse battery protection, a pre-boost stage to support cold-crank battery voltage conditions down to 3.5 volts, buck regulators for 3.3-V and 5-V (...)
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Reference design

TIDA-020012 — Automotive pixelated dome light reference design for interior lighting

This reference design details a solution to drive and control 30 LEDs individually for automotive interior dome light applications. The high pixel count can be used to create different light zones or welcome light animations. The design also implements LED multiplexing functionality to control up (...)
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Reference design

TIDA-050015 — Automotive ADAS camera power supply reference design optimized for solution size and low noise

This wide-input power-supply reference design is specifically designed for space-constrained automotive ADAS camera applications. This size-optimized design uses front-end protection paired with a wide input voltage DC/DC converter to enable off-battery operation. The front-end filter and (...)
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Reference design

TIDA-050031 — Back-up battery power reference design for automotive emergency calling applications

This back-up power reference design is for automotive E-Call application. It uses one cell LiFePO4 as the backup battery. The minimum backup battery voltage can be down to 2 V with boost converter TPS61088-Q1; the maximum output power can be 8 V/1.7A. This reference design is low-cost, high (...)
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VQFN-HR (RNX) 12 Ultra Librarian
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