LMR33630

ACTIVE

SIMPLE SWITCHER® 3.8V to 36V, 3A 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) 3 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: 3 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 TPSM53603 module for faster time to market
  • Create a custom design using the LMR33630 with the WEBENCH® Power Designer

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Description

The LMR33630 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 LMR33630 drives up to 3 A of load current from an input of up to 36 V. The LMR33630 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 LMR33630 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 LMR33630 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 TPSM53603 ACTIVE 36-V, 3-A step-down power module in small 5.5 x 5 x 4 mm RLF QFN package 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 LMR33630 SIMPLE SWITCHER® 3.8-V to 36-V, 3-A synchrns stp-dwn cnvrtr datasheet (Rev. E) May 05, 2020
Application notes Working with Inverting Buck-Boost Converters (Rev. A) May 14, 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 Achieving CISPR-22 EMI Standards With HotRod™ Buck Designs (Rev. A) Sep. 17, 2019
Technical articles Design a pre-tracking regulator, part 2: for a negative LDO Apr. 26, 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
Technical articles Designing a pre-tracking regulator, part 1: for a positive-output LDO Feb. 18, 2019
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 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.

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
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
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
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

Design tools & simulation

SIMULATION MODELS Download
SNVMBF6A.ZIP (159 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBF9A.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBG4.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBG5.ZIP (130 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH1.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBH2.ZIP (127 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
REFERENCE DESIGNS Download
Compact, efficient, 24-V input auxiliary power supply reference design for servo drives
TIDA-010009 — This reference design showcases a method to generate power supplies required in a servo or AC drive including the analog and digtal I/O interfaces, encoder supply, isolated transceivers and digital processing block. This design also implements protection against input reverse polarity, output (...)
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

Support & training

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