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LMZM33603

ACTIVE

4V to 36V, 3A Step-Down DC/DC Power Module in Compact 7x9x4mm QFN Package

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Data sheet

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TPSM63603 ACTIVE High-density, 3-V to 36-V input, 1-V to 16-V output, 3-A power module Significantly smaller footprint, lower EMI, higher efficiency, and optional spread spectrum.

LMZM33603

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck, Inverting Buck-Boost, Synchronous Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 4 Vout (max) (V) 18 Vout (min) (V) 1 Features EMI Tested, Enable, Frequency synchronization, Power good Operating temperature range (°C) -40 to 105 Type Module Duty cycle (max) (%) 90 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1200
Rating Catalog Topology Buck, Inverting Buck-Boost, Synchronous Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 4 Vout (max) (V) 18 Vout (min) (V) 1 Features EMI Tested, Enable, Frequency synchronization, Power good Operating temperature range (°C) -40 to 105 Type Module Duty cycle (max) (%) 90 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1200
B3QFN (RLR) 18 63 mm² 9 x 7
  • Complete Integrated Power Solution
    • As Few as 4 External Components
    • Minimum Solution Size < 100 mm2
  • 9 mm × 7 mm × 4 mm QFN Package
    • All Pins Accessible from Package Perimeter
    • Pin Compatible with 2-A LMZM33602
  • Input Voltage Range: 4 V to 36 V
  • Output Voltage Range:
    • 1 V to 13.5 V at 3 A
    • 1 V to 18 V at 2 A
  • Efficiencies Up To 95%
  • Adjustable Switching Frequency
    (200 kHz to 1.2 MHz)
  • Allows Synchronization to an External Clock
  • Power-Good Output
  • Meets EN55011 Class B Radiated EMI Standards
  • Operating IC Junction Range: –40°C to +125°C
  • Operating Ambient Range: –40°C to +105°C
  • Create a Custom Design Using the LMZM33603 With the WEBENCH® Power Designer
  • Complete Integrated Power Solution
    • As Few as 4 External Components
    • Minimum Solution Size < 100 mm2
  • 9 mm × 7 mm × 4 mm QFN Package
    • All Pins Accessible from Package Perimeter
    • Pin Compatible with 2-A LMZM33602
  • Input Voltage Range: 4 V to 36 V
  • Output Voltage Range:
    • 1 V to 13.5 V at 3 A
    • 1 V to 18 V at 2 A
  • Efficiencies Up To 95%
  • Adjustable Switching Frequency
    (200 kHz to 1.2 MHz)
  • Allows Synchronization to an External Clock
  • Power-Good Output
  • Meets EN55011 Class B Radiated EMI Standards
  • Operating IC Junction Range: –40°C to +125°C
  • Operating Ambient Range: –40°C to +105°C
  • Create a Custom Design Using the LMZM33603 With the WEBENCH® Power Designer

The LMZM33603 power module is an easy-to-use integrated power solution that combines a 3-A, step-down, DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low-profile package. This power solution requires as few as four external components and eliminates the loop compensation and magnetics part selection from the design process.

The 9 mm × 7 mm × 4 mm 18-pin, QFN package is easy to solder onto a printed circuit board and allows a compact, low-profile, point-of-load design. The full feature set, including power good, programmable UVLO, prebias start-up, and overcurrent and over-temperature protection, make the LMZM33603 an excellent device for powering a wide range of applications.

The LMZM33603 power module is an easy-to-use integrated power solution that combines a 3-A, step-down, DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low-profile package. This power solution requires as few as four external components and eliminates the loop compensation and magnetics part selection from the design process.

The 9 mm × 7 mm × 4 mm 18-pin, QFN package is easy to solder onto a printed circuit board and allows a compact, low-profile, point-of-load design. The full feature set, including power good, programmable UVLO, prebias start-up, and overcurrent and over-temperature protection, make the LMZM33603 an excellent device for powering a wide range of applications.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LMZM33603 4-V to 36-V Input, 3-A Step-Down DC/DC Power Module in QFN Package datasheet (Rev. C) PDF | HTML 23 Mar 2018
Application note Soldering Considerations for Power Modules (Rev. C) PDF | HTML 14 Mar 2024
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 26 Jul 2021
Application note Bang for your Buck-An Intro to Buck Converter vs. Buck Power Module Comparison PDF | HTML 28 Aug 2020
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) 20 Nov 2019
Technical article Advantages of using nonisolated DC/DC power buck modules in DAQ applications PDF | HTML 15 Jan 2019
Technical article Enhancing DAQ performance for grid protection, control and monitoring equipment us PDF | HTML 11 Dec 2018
Application note Inverting Application for the LMZM33603 (Rev. B) 19 Oct 2018
White paper Power modules for lab instrumentation 18 Oct 2018
White paper Simplify low EMI design with power modules 20 Nov 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMZM33603EVM — LMZM33603, 4V to 36V Input, 3A Power Module Evaluation Board

The LMZM33603 evaluation board is configured to evaluate the operation of the LMZM33603 power module for current up to 3.0A. The input voltage range is 4V to 36V. The output voltage range is 1V to 18V. The evaluation board makes it easy to evaluate the LMZM33603 operation.
User guide: PDF
Not available on TI.com
Simulation model

LMZM33603 Non-inverting and Inverting PSpice Transient Model

SNVMBF4.ZIP (209 KB) - PSpice Model
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Simulation model

LMZM33603 Unencrypted Non-inverting and Inverting PSpice Transient Model

SNVMBF5.ZIP (7 KB) - PSpice Model
Download
Reference designs

TIDA-010076 — Daisy-chained power and data over single pair Ethernet (T1) reference design

The TIDA-010076 shows the transfer of 220-W power and 100-Mbit/s data over SPE. Communication systems in daisy-chain topology need significantly less hardware and wiring than conventional systems in star-topology. When combined with single-pair Ethernet (SPE, 100BASE-T1) and power over data line, (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010011 — High efficiency power supply architecture reference design for protection relay processor module

This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
B3QFN (RLR) 18 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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