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LMR33620-Q1

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3.8-V to 36-V, 2-A synchronous step-down voltage converter

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Data sheet

LMR33620-Q1

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 2 Iq (Typ) (uA) 24 Switching frequency (Min) (kHz) 400 EMI features Low parasitic Hotrod packaging Switching frequency (Max) (kHz) 2100 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, Wettable Flanks Package Rating Automotive Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 98
Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 2 Iq (Typ) (uA) 24 Switching frequency (Min) (kHz) 400 EMI features Low parasitic Hotrod packaging Switching frequency (Max) (kHz) 2100 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, Wettable Flanks Package Rating Automotive Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 98
VQFN-HR (RNX) 12 6 mm² 3 x 2
  • 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: 2 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 conversation 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 LMR33620-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: 2 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 conversation 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 LMR33620-Q1 with the WEBENCH Power Designer

The LMR33620-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 LMR33620-Q1 drives up to 2 A of load current from an input of up to 36 V. The LMR33620-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 LMR33620-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 LMR33620-Q1 is available in a 12-pin 3 mm × 2 mm next generation VQFN package with wettable flanks.

The LMR33620-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 LMR33620-Q1 drives up to 2 A of load current from an input of up to 36 V. The LMR33620-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 LMR33620-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 LMR33620-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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Type Title Date
* Data sheet LMR33620-Q1 3.8-V to 36-V, 2-A Synchronous Step-Down Voltage Converter datasheet (Rev. C) PDF | HTML 14 Oct 2020
Application note Working with Inverting Buck-Boost Converters (Rev. B) PDF | HTML 18 Oct 2022
Functional safety information LMR336x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) PDF | HTML 02 Dec 2020
Application note PCB Thermal Design Tips for Automotive DC/DC Converters PDF | HTML 12 Nov 2020
White paper Demystifying Input Supply Current in DC/DC Regulators:From Shutdown to Full Load 18 May 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs 11 Dec 2019
Application note Understanding Mode Transitions for LMR33620/30 and LMR36006/15 04 Apr 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
EVM User's guide LMR33630xRNXEVM User's Guide 22 Feb 2018

Design & development

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

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
Not available on TI.com
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
Not available on TI.com
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
Not available on TI.com
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
Not available on TI.com
Simulation model

LMR33620A Non-Inverting and inverting Unencrypted PSpice Transient Model (Rev. A)

SNVMBH7A.ZIP (125 KB) - PSpice Model
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Simulation model

LMR33620B Non-Inverting and inverting Unencrypted PSpice Transient Model (Rev. A)

SNVMBH4A.ZIP (124 KB) - PSpice Model
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Simulation model

LMR33620C Non-Inverting and inverting Unencrypted PSpice Transient Model (Rev. A)

SNVMBG9A.ZIP (130 KB) - PSpice Model
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Simulation model

LMR33620CQ3-Q1 Unencrypted Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVMBK7A.ZIP (177 KB) - PSpice Model
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Simulation model

LMR33620CQ5-Q1 Unencrypted Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVMBK9A.ZIP (174 KB) - PSpice Model
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Calculation tool

Mode Transitions Calculator LMR336x0 LMR360xx

SNVC234.ZIP (442 KB)
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Calculation tool

LMR336x0 Component Calculator

SNVR484.ZIP (938 KB)
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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 (...)
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Reference designs

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 (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
VQFN-HR (RNX) 12 View options

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