4V to 36V, 2A Step-Down DC/DC Power Module in Compact 7x9x4mm QFN Package


Product details


Iout (Max) (A) 2 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 Duty cycle (Max) (%) 90 Topology Buck, Inverting Buck-Boost, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

B3QFN (RLR) 18 63 mm² 7 x 9 open-in-new Find other Buck modules (integrated inductor)


  • Complete integrated power solution
    • As few as four external components
    • Minimum solution size < 100 mm2
  • 9-mm × 7-mm × 4-mm QFN package
    • All pins accessible from package perimeter
    • Pin compatible with 3-A LMZM33603
  • Input voltage range: 4 V to 36 V
  • Output voltage range: 1 V to 18 V
  • 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 LMZM33602 with the WEBENCH Power Designer
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The LMZM33602 power module is an easy-to-use integrated power solution that combines a 2-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, overcurrent and overtemperature protections, make the LMZM33602 an excellent device for powering a wide range of applications.

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Technical documentation

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Type Title Date
* Data sheet LMZM33602 4-V to 36-V Input, 2-A Power Module in QFN Package datasheet (Rev. D) Aug. 11, 2020
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) Jul. 26, 2021
Application note Soldering Considerations for Power Modules (Rev. B) May 17, 2021
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) Nov. 20, 2019
Technical article Advantages of using nonisolated DC/DC power buck modules in DAQ applications Jan. 15, 2019
Technical article Enhancing DAQ performance for grid protection, control and monitoring equipment using DC/DC power modules Dec. 11, 2018
Application note Inverting Application for the LMZM33603 (Rev. B) Oct. 19, 2018
White paper Power modules for lab instrumentation Oct. 18, 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

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Hardware development

document-generic User guide
The LMZM33602 evaluation board is configured to evaluate the operation of the LMZM33602 power module for current up to 2.0 A. 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 LMZM33602 operation.
  • 4.0V to 36V Input Voltage Range
  • Up to 2.0A of Output Current
  • 1.0V to 18V Output Voltage Range

Design tools & simulation

SNVMBF7.ZIP (225 KB) - PSpice Model
SNVMBF8.ZIP (7 KB) - PSpice Model
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 (...)
  • 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

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
B3QFN (RLR) 18 View options

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