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Power modules (integrated inductor)

LMZ35003

ACTIVE

7V to 50V, 2.5A Step-Down Power Module in 9x11x2.8mm QFN Package

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Data sheet

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Same functionality with different pin-out to the compared device
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.

LMZ35003

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck, Inverting Buck-Boost Type Module Iout (max) (A) 2.5 Vin (min) (V) 7 Vin (max) (V) 50 Vout (min) (V) 2.5 Vout (max) (V) 15 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1000 Features EMI Tested, Frequency synchronization, Overcurrent protection, Power good, Tracking Duty cycle (max) (%) 85
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck, Inverting Buck-Boost Type Module Iout (max) (A) 2.5 Vin (min) (V) 7 Vin (max) (V) 50 Vout (min) (V) 2.5 Vout (max) (V) 15 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1000 Features EMI Tested, Frequency synchronization, Overcurrent protection, Power good, Tracking Duty cycle (max) (%) 85
B1QFN (RKG) 41 99 mm² 11 x 9
  • Complete Integrated Power Solution Allows
    Small Footprint, Low-Profile Design
  • Wide Input Voltage Range from 7 V to 50 V
  • Output Adjustable from 2.5 V to 15 V
  • 65-V Surge Capability
  • Efficiencies Up To 96%
  • Adjustable Switching Frequency
    (300 kHz to 1 MHz)
  • Synchronizes to an External Clock
  • Adjustable Slow-Start
  • Output Voltage Sequencing and Tracking
  • Power Good Output
  • Programmable Undervoltage Lockout (UVLO)
  • Output Overcurrent Protection
  • Over Temperature Protection
  • Pre-bias Output Start-up
  • Operating Temperature Range: –40°C to 85°C
  • Enhanced Thermal Performance: 14°C/W
  • Meets EN55022 Class B Emissions
    - Integrated Shielded Inductor
  • For Design Help visit http://www.ti.com/LMZ35003
  • Create a Custom Design Using the LMZ35003 With the WEBENCH® Power Designer
  • Complete Integrated Power Solution Allows
    Small Footprint, Low-Profile Design
  • Wide Input Voltage Range from 7 V to 50 V
  • Output Adjustable from 2.5 V to 15 V
  • 65-V Surge Capability
  • Efficiencies Up To 96%
  • Adjustable Switching Frequency
    (300 kHz to 1 MHz)
  • Synchronizes to an External Clock
  • Adjustable Slow-Start
  • Output Voltage Sequencing and Tracking
  • Power Good Output
  • Programmable Undervoltage Lockout (UVLO)
  • Output Overcurrent Protection
  • Over Temperature Protection
  • Pre-bias Output Start-up
  • Operating Temperature Range: –40°C to 85°C
  • Enhanced Thermal Performance: 14°C/W
  • Meets EN55022 Class B Emissions
    - Integrated Shielded Inductor
  • For Design Help visit http://www.ti.com/LMZ35003
  • Create a Custom Design Using the LMZ35003 With the WEBENCH® Power Designer

The LMZ35003 power module is an easy-to-use integrated power solution that combines a 2.5-A DC/DC converter with a shielded inductor and passives into a low profile, QFN package. This total power solution allows as few as five external components and eliminates the loop compensation and magnetics part selection process.

The small 9 mm × 11 mm × 2.8 mm, QFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design with greater than 90% efficiency and excellent power dissipation capability. The LMZ35003 offers the flexibility and the feature-set of a discrete point-of-load design and is ideal for powering a wide range of ICs and systems. Advanced packaging technology affords a robust and reliable power solution compatible with standard QFN mounting and testing techniques.

The LMZ35003 power module is an easy-to-use integrated power solution that combines a 2.5-A DC/DC converter with a shielded inductor and passives into a low profile, QFN package. This total power solution allows as few as five external components and eliminates the loop compensation and magnetics part selection process.

The small 9 mm × 11 mm × 2.8 mm, QFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design with greater than 90% efficiency and excellent power dissipation capability. The LMZ35003 offers the flexibility and the feature-set of a discrete point-of-load design and is ideal for powering a wide range of ICs and systems. Advanced packaging technology affords a robust and reliable power solution compatible with standard QFN mounting and testing techniques.
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Technical documentation

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Type Title Date
* Data sheet LMZ35003 2.5-A Power Module With 7-V to 50-V Input QFN Package datasheet (Rev. B) 11 Apr 2018
Application note Soldering Considerations for Power Modules (Rev. C) PDF | HTML 14 Mar 2024
Selection guide Innovative DC/DC Power Modules Selection Guide (Rev. D) 14 Oct 2021
Application note Soldering Requirements for BQFN Packages (Rev. C) 05 Mar 2020
White paper Simplify low EMI design with power modules 20 Nov 2017
Application note Working With QFN Power Modules (Rev. A) 08 Jun 2017
Application note Power Module MSL Ratings 20 Jan 2017
Technical article Industrial stack lights get smarter with LEDs PDF | HTML 09 Aug 2016
Application note LMZ35003 Protects Against 60-V Line Transients 18 Jun 2015
Application note LMZ35003 Parallel Operation 28 May 2014
EVM User's guide Using the LMZ35003EVM 02 Jul 2013

Design & development

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

Evaluation board

LMZ35003EVM-001 — LMZ35003 7V to 50V, 2.5A Step-Down Power Module Evaluation Board

The Texas Instruments LMZ35003EVM-001 evaluation module (EVM) makes it easy for designers to evaluate the performance and operation of the LMZ35003. The EVM operates with an input voltage range of 7V to 50V and deliver up to 2.5A of output current. The output voltage can be selected from four (...)
User guide: PDF
Not available on TI.com
Simulation model

LMZ35003 PSpice Average Model

SLVMAF6.ZIP (74 KB) - PSpice Model
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Simulation model

LMZ35003 Unencrypted PSpice Average Model

SNVM794.ZIP (1 KB) - PSpice Model
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Simulation model

LMZ35003 Unencrypted PSpice Transient Model

SNVM795.ZIP (5 KB) - PSpice Model
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Simulation model

TPS84250 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM669A.ZIP (40 KB) - PSpice Model
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Reference designs

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This reference design is a multi-segment RGB signal tower for industrial process automation. The reference design enables fully flexible control of color and brightness and allows easy modification of the amount of segments. With this smart process condition and safety indicator, (...)
Design guide: PDF
Schematic: PDF
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TIDA-01461 — EtherCAT P® One Cable for Power and EtherCAT® Reference Design

This reference design shows a physical implementation of the power couple in circuitry of an EtherCAT P® power sourcing device. The reference design is designed to meet all requirements from the official EtherCAT P implementation guide. This includes features like reverse polarity protection, (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00980 — RGB LED Signal Tower With IO-Link Interface Reference Design

The objective of the TIDA-00980 reference design is to develop an embedded firmware to interface and control the functions of a multi-segment RGB signal tower used in factory floor and industrial process automation of greater complexity. This design helps to give more flexible usage along (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00994 — RGB LED Signal Tower With Wi-Fi® Interface Reference Design

The objective of the TIDA-00994 reference design is to develop an embedded firmware of a multi-segment RGB signal tower used in factory floor and industrial process automation of greater complexity. A Wi-Fi ® interface is implemented to control the stack light and read back status information. (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
B1QFN (RKG) 41 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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