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 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, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 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

  • Functional Safety-Capable
  • 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
    • 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
  • Low EMI and switching noise
    • HotRod™ package
    • Parallel input current paths
  • 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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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
NEW TPSM53602 ACTIVE 36-V, 2-A step-down power module in small 5.5 x 5 x 4-mm Enhanced HotRod™ QFN with simple footprint Save board space, simplify design, and speed time to market with an integrated-inductor power module.

Technical documentation

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Type Title Date
* Datasheet LMR33620SIMPLE SWITCHER® 3.8-V to 36-V, 2-A Synchronous Step-down Voltage Converter datasheet (Rev. E) Nov. 24, 2020
Functional safety information LMR336x0 Functional Safety, FIT Rate, FMD and Pin FMA Nov. 06, 2020
Application note Working with Inverting Buck-Boost Converters (Rev. A) May 14, 2020
Selection guide 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 note 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
White paper Power modules for lab instrumentation Oct. 18, 2018
Application note 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 guide LMR33630EVM User's Guide (Rev. A) Mar. 01, 2018
User guide LMR33630xRNXEVM User's Guide Feb. 22, 2018
Technical articles How to increase system reliability and simplify design using DC/DC converters Jun. 13, 2016

Design & development

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Design tools & simulation

SIMULATION MODEL Download
SNVMBG9A.ZIP (130 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBH4A.ZIP (124 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBH7A.ZIP (125 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBK7A.ZIP (177 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBK9A.ZIP (174 KB) - PSpice Model
SIMULATION TOOL 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 TOOL Download
SNVC234.ZIP (442 KB)
CALCULATION TOOL Download
SNVR484.ZIP (938 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

CAD/CAE symbols

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

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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