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LMR33620-Q1

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

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

LMR33620-Q1

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Data sheet Order now

Product details

Parameters

Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 2 Regulated outputs (#) 1 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 Control mode Current Mode TI functional safety category Functional Safety-Capable Duty cycle (Max) (%) 98 Type Converter Operating temperature range (C) -40 to 125 Rating Automotive open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RNX) 12 6 mm² 3 x 2 open-in-new Find other Buck converters (integrated switch)

Features

  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
  • 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
    • Low EMI and low switching noise
    • Integrated compensation network
  • High-efficiency solution
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 25 µA
  • Flexible system interface
    • Power-good flag and precision enable
  • Create a custom design using the LMR33620-Q1 with the WEBENCH® Power Designer

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Description

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 VQFN package with wettable flanks.

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Technical documentation

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Type Title Date
* Datasheet LMR33620-Q1 3.8-V to 36-V, 2-A Synchronous step-down voltage converter datasheet (Rev. B) Mar. 01, 2019
Application notes LMR336x0-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) May 07, 2020
Technical articles Optimizing flip-chip IC thermal performance in automotive designs Dec. 11, 2019
Application notes Understanding Mode Transitions for LMR33620/30 and LMR36006/15 Apr. 04, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guides LMR33630xRNXEVM User's Guide Feb. 22, 2018

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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.
Features
  • Integraged synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads
  • Short minimum on-time
View details
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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.
Features
  • Inegrated synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads
  • Short minimum on-time
View details
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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.
Features
  • Integrated synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads
  • Short minimum on-time
View details
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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.
Features
  • Inegrated synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads
  • Short minimum on-time
View details

Design tools & simulation

CALCULATION TOOLS Download
SNVC234.ZIP (442 KB)

Reference designs

REFERENCE DESIGNS Download
Automotive ADAS camera power supply reference design optimized for solution size and low noise
TIDA-050015 — 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 component (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN-HR (RNX) 12 View options

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Training series

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Videos

Case Study: Speeding up time to market with scalable DC-DC converters

Watch ease of use in action with scalable SIMPLE SWITCHER® converters and WEBENCH®

Posted: 15-Jan-2019
Duration: 04:42

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