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LMR33620-Q1

ACTIVE

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

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Data sheet

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LMR43620-Q1 ACTIVE Automotive, 3-V to 36-V, 2-A low-EMI synchronous buck regulator with low IQ Smaller footprint, higher efficiency, lower EMI, lower IQ and spread-spectrum

LMR33620-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3.8 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 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 EMI features Low parasitic Hotrod packaging Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Iq (typ) (µA) 24 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3.8 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 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 EMI features Low parasitic Hotrod packaging Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Iq (typ) (µA) 24 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
Functional safety information LMR336x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. C) PDF | HTML 22 Mar 2024
Application note Working with Inverting Buck-Boost Converters (Rev. B) PDF | HTML 18 Oct 2022
Application note PCB Thermal Design Tips for Automotive DC/DC Converters PDF | HTML 12 Nov 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML 11 Dec 2019
Application note Understanding Mode Transitions for LMR33620/30 and LMR36006/15 04 Apr 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

SNVC234 — Mode Transitions Calculator LMR336x0 LMR360xx

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LMR33620 — SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI LMR33620-Q1 — 3.8-V to 36-V, 2-A synchronous step-down voltage converter LMR33630 — SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI LMR33630-Q1 — 3.8-V to 36-V, 3-A synchronous step-down voltage converter LMR36006 — 4.2-V to 60-V, 0.6-A ultra-small synchronous step-down converter LMR36006-Q1 — 4.2-V to 60-V, 0.6-A ultra-small synchronous step-down converter LMR36015 — 4.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter LMR36015-Q1 — 4.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter
Download
Calculation tool

SNVR484 — LMR336x0 Component Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LMR33620 — SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI LMR33620-Q1 — 3.8-V to 36-V, 2-A synchronous step-down voltage converter LMR33630 — SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI LMR33630-Q1 — 3.8-V to 36-V, 3-A synchronous step-down voltage converter LMR33640 — SIMPLE SWITCHER® 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package LMR36015 — 4.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter LMR36015-Q1 — 4.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter
Download
Reference designs

TIDM-02017 — Two- and three-wheeler traction inverter reference design

TIDM-02017 is a 5kW 48V traction-inverter reference design which aims to provide a foundation for you to develop high-performance high-efficiency traction-inverter systems for 2-wheeler and 3-wheeler applications and help you get to market faster. The design features a F28P65x C2000™ (...)
Design guide: PDF
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 CAD symbols, footprints & 3D models
VQFN-HR (RNX) 12 Ultra Librarian
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