LMR33620

ACTIVE

SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI

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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 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, Synchronous Rectification, Wettable Flanks Package Control mode Current Mode Duty cycle (Max) (%) 98 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 VQFN-HR (RNX) 12 6 mm² 3 x 2 open-in-new Find other Buck converters (integrated switch)

Features

  • Configured for rugged industrial 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
    • Junction temperature range –40°C to +125°C
    • Low EMI and low switching noise
    • Integrated compensation network
  • High power conversion at all loads
    • Peak efficiency > 95%
    • Low operating quiescent current of 25 µA
  • Flexible system interface
    • Power-good flag and precision enable
  • Use TPSM53602 module for faster time to market
  • Create a custom design using the LMR33620 with the WEBENCH® Power Designer

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Description

The LMR33620 SIMPLE SWITCHER® regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33620 drives up to 2 A of load current from an input of up to 36 V. The LMR33620 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 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 is available in an 8-pin HSOIC package and in a 12-pin 3 mm × 2 mm next generation VQFN package with wettable flanks. This device is also available in an AEC-Q100-qualified version.

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Technical documentation

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Type Title Date
* Datasheet LMR33620 SIMPLE SWITCHER® 3.8-V to 36-V, 2-A Synchrns Stp-Dwn Cnvrtr datasheet (Rev. D) May 05, 2020
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles 3 tips when designing a power stage for servo and AC drives Nov. 20, 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
Application notes Working with inverting buck-boost converters Feb. 18, 2019
White papers Power modules for lab instrumentation Oct. 18, 2018
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Technical articles A review of EMI standards, part 2 – radiated emissions Jul. 05, 2018
User guides LMR33630EVM User's Guide (Rev. A) Mar. 01, 2018
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.

Design tools & simulation

SIMULATION MODELS Download
SNVMBG9.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH0.ZIP (129 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH3.ZIP (122 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH4.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH6.ZIP (107 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH7.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBK6.ZIP (147 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBK7.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBK8.ZIP (144 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBK9.ZIP (7 KB) - PSpice Model
CALCULATION TOOLS Download
SNVC234.ZIP (442 KB)

Reference designs

REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
VQFN-HR (RNX) 12 View options

Ordering & quality

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