LMR33620-Q1

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

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Product details

Parameters

Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 2 Iq (Typ) (mA) 0.024 Iq (Typ) (uA) 24 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 Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 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
White papers Demystifying Input Supply Current in DC/DC Regulators:From Shutdown to Full Load May 18, 2020
Application notes Working with Inverting Buck-Boost Converters (Rev. A) May 14, 2020
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
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
EVALUATION BOARDS Download
document-generic User guide
49
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
EVALUATION BOARDS Download
document-generic User guide
49
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
EVALUATION BOARDS Download
document-generic User guide
49
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

Design tools & simulation

SIMULATION MODELS Download
SNVMBG9A.ZIP (130 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH4A.ZIP (124 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH7A.ZIP (125 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBK7A.ZIP (177 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBK9A.ZIP (174 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
SNVC234.ZIP (442 KB)
CALCULATION TOOLS Download
SNVR484.ZIP (938 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

Ordering & quality

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