36-V, 4-A step-down power module in small 5.5 x 5 x 4-mm Enhanced HotRod™ QFN with simple footprint


Product details


Iout (Max) (A) 4 Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 7 Soft start Fixed Features EMI Tested, Enable, Light Load Efficiency, Power Good Operating temperature range (C) -40 to 125 Iq (Typ) (uA) 24 Regulated outputs (#) 1 Duty cycle (Max) (%) 98 Topology Buck, Inverting Buck-Boost, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

B3QFN (RDA) 15 28 mm² 5 x 5 open-in-new Find other Buck modules (integrated inductor)


  • 5-mm × 5.5-mm × 4-mm Enhanced HotRod QFN package
    • Industry’s smallest 36-V, 4-A footprint: 85 mm2 solution size (single sided)
    • Low EMI: Meets CISPR11 radiated emissions
    • Excellent thermal performance: Up to 20 W output power at 85°C, no airflow
    • Standard footprint: single large thermal pad and all pins accessible from perimeter
  • Input voltage range: 3.8 V to 36 V
  • Output voltage range: 1 V to 7 V
  • Efficiency up to 95%
  • Power-good flag
  • Precision enable
  • Built-in hiccup-mode short-circuit protection, over-temperature protection, start-up into pre-bias output, soft start, and UVLO
  • Operating IC junction range: –40°C to +125°C
  • Operating ambient range: –40°C to +105°C
  • Shock and vibration tested to Mil-STD-883D
  • Pin compatible with: 3-A TPSM53603 and 2-A TPSM53602
  • Create a custom design using the TPSM53604 with the WEBENCH Power Designer
  • Download the EVM Design Files for fast board design
open-in-new Find other Buck modules (integrated inductor)


The TPSM53604 power module is a highly integrated 4-A power solution that combines a 36-V input, step-down, DC/DC converter with power MOSFETs, a shielded inductor, and passives in a thermally-enhanced QFN package. The 5-mm x 5.5-mm x 4-mm, 15-pin package uses Enhanced HotRod QFN technology for improved thermal performance, small footprint, and low EMI. The package footprint has all pins accessible from the perimeter and a single large thermal pad for simple layout and easy handling in manufacturing.

The total solution requires as few as four external components and eliminates the loop compensation and magnetics part selection from the design process. The full feature set includes power good, programmable UVLO, prebias start-up, overcurrent, and overtemperature protections, making the TPSM53604 an excellent device for powering a wide range of applications.

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

Technical documentation

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Type Title Date
* Data sheet TPSM53604 36-V Input, 4-A Power Module in Enhanced HotRod™ QFN Package datasheet (Rev. B) Aug. 13, 2020
Application note Soldering Considerations for Power Modules (Rev. B) May 17, 2021
Technical article Powering medical imaging applications with DC/DC buck converters Nov. 24, 2020
Application note Soldering Requirements for BQFN Packages (Rev. C) Mar. 05, 2020
Technical article 35 years later, APEC continues to set the tone for innovation in power management Feb. 27, 2020
User guide Using the TPSM53604EVM, TPSM53603EVM, and TPSM53602EVM (Rev. B) Dec. 13, 2019
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) Nov. 20, 2019
White paper Enabling Small, Cool and Quiet Power Modules with Enhanced HotRod™ QFN Packaging Nov. 19, 2019
Application note Using the TPSM5360x for an Inverting Buck-Boost Application Oct. 29, 2019

Design & development

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Hardware development

document-generic User guide
The TPSM53604 evaluation board (EVM) is configured to evaluate the operation of the TPSM53604 power module for current up to 4 A. The input voltage range is 3.8 V to 36 V. The output voltage range is 1 V to 7 V. The evaluation board makes it easy to evaluate the TPSM53604 operation.
  • 3.8-V to 36-V input voltage range
  • Up to 4 A of output current
  • 1-V to 7-V output voltage
  • 5-mm x 5.5-mm QFN package

Design tools & simulation

SNVMC56.ZIP (387 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
  • (...)
SNVR482.ZIP (3265 KB)

CAD/CAE symbols

Package Pins Download
B3QFN (RDA) 15 View options

Ordering & quality

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