LMZM33603

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

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Product details

Parameters

Iout (Max) (A) 3 Vin (Min) (V) 4 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 18 Soft start Fixed Features EMI Tested, Enable, Frequency Synchronization, Power Good Operating temperature range (C) -40 to 105 Iq (Typ) (uA) 8500 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1200 Switching frequency (Min) (kHz) 200 Switching frequency (Typ) (kHz) 400 Duty cycle (Max) (%) 90 Topology Buck, Inverting Buck-Boost, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

B2QFN (RLR) 18 63 mm² 7 x 9 open-in-new Find other Buck modules (integrated inductor)

Features

  • 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

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open-in-new Find other Buck modules (integrated inductor)

Description

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.

open-in-new Find other Buck modules (integrated inductor)
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Technical documentation

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Type Title Date
* Datasheet LMZM33603 4-V to 36-V Input, 3-A Step-Down DC/DC Power Module in QFN Package datasheet (Rev. C) Mar. 23, 2018
Application note Bang for your Buck-An Intro to Buck Converter vs. Buck Power Module Comparison Aug. 28, 2020
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) Nov. 20, 2019
Technical articles Advantages of using nonisolated DC/DC power buck modules in DAQ applications Jan. 15, 2019
Technical articles Enhancing DAQ performance for grid protection, control and monitoring equipment using DC/DC power modules Dec. 11, 2018
Application note Soldering Considerations for Power Modules Nov. 26, 2018
Application note Inverting Application for the LMZM33603 (Rev. B) Oct. 19, 2018
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
White paper Simplify low EMI design with power modules Nov. 20, 2017
User guide Using the LMZM33603 and LMZM33602 EVM Aug. 11, 2017

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description
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.
Features
  • 4.0V to 36V Input Voltage Range
  • Up to 3.0A of Output Current
  • 1.0V to 18V Output Voltage Range

Design tools & simulation

SIMULATION MODEL Download
SNVMBF4.ZIP (209 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBF5.ZIP (7 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
Daisy-chained power and data over single pair Ethernet (T1) reference design
TIDA-010076 — This reference design 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 (...)
document-generic Schematic
REFERENCE DESIGNS Download
High efficiency power supply architecture reference design for protection relay processor module
TIDA-010011 — 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 (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
B2QFN (RLR) 18 View options

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