NEW

LMR33640

ACTIVE

SIMPLE SWITCHER® 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package

Top

Product details

Parameters

Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 24 Iout (Max) (A) 4 Iq (Typ) (mA) 0.024 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 1000 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 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
    • Peak-current mode control
    • Junction temperature range: –40°C to +125°C
    • Ease-of-use SOIC package
  • Well-suited for scalable industrial power supplies
    • Pin compatible with:
    • 400-kHz and 1-MHz frequency
    • Integrated compensation helps reduce solution size, cost, and design complexity
  • High-efficiency solution
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 24 µA
  • Flexible system interface
    • Power-good flag and precision enable
  • Create a custom design using the LMR33640 with the WEBENCH® Power Designer
  • Use TPSM53604 module for faster time to market

All trademarks are the property of their respective owners.

open-in-new Find other Buck converters (integrated switch)

Description

The LMR33640 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 LMR33640 drives up to 4 A of load current from an input of up to 36 V. The LMR33640 provides high light-load efficiency and output accuracy. 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 LMR33640 automatically folds back frequency at light load to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR33640 is pin-to-pin compatible with the LMR33610, LMR33620, LMR33630 (36 V, 1 A/2, A/3 A), LMR36510 (65 V, 1 A), and LMR36520 (65 V, 2 A), completing the family of scalable SIMPLE SWITCHER power supplies. This minimizes the cost and effort associated with board layout modifications. The LMR33640 is available in an 8-pin HSOIC package.

open-in-new Find other Buck converters (integrated switch)
Download
Similar products you might be interested in
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
NEW TPSM53604 ACTIVE 36-V, 4-A step-down power module in small 5.5 x 5 x 4mm RLF QFN package with simple footprint Save board space, simplify design, and speed time to market with an integrated-inductor power module.

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet LMR33640 SIMPLE SWITCHER 3.8-V to 36-V, 4-A Synchronous Step-down Converter datasheet (Rev. B) Apr. 17, 2020
Application notes Working with Inverting Buck-Boost Converters (Rev. A) May 14, 2020
Technical articles 3 tips when designing a power stage for servo and AC drives Nov. 20, 2019
User guides LMR33640EVM User's Guide Nov. 01, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

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 LMR33640 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33640ADDA synchronous step-down converer.
Features
  • Integrated synchronous rectification
  • Low operating quiescent current
  • High light load efficiency
  • Short minimum on-time

Design tools & simulation

SIMULATION MODELS Download
SNVMBV0.ZIP (175 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBV1.ZIP (172 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos