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


Product details


Iout (Max) (A) 2.5 Vin (Min) (V) 7 Vin (Max) (V) 50 Vout (Min) (V) 2.5 Vout (Max) (V) 15 Soft start Adjustable Features EMI Tested, Enable, Frequency Synchronization, Power Good, Remote Sense, Tracking Operating temperature range (C) -40 to 85 Iq (Typ) (uA) 700 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1000 Switching frequency (Min) (kHz) 300 Switching frequency (Typ) (kHz) 400 Duty cycle (Max) (%) 85 Topology Buck, Inverting Buck-Boost open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

B1QFN (RKG) 41 99 mm² 11 x 9 open-in-new Find other Buck modules (integrated inductor)


  • 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

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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) Apr. 11, 2018
Application note Soldering Considerations for Power Modules (Rev. A) Dec. 11, 2020
Application note Soldering Requirements for BQFN Packages (Rev. C) Mar. 05, 2020
Selection guide Innovative DC/DC Power Modules Selection Guide (Rev. C) Feb. 27, 2018
White paper Simplify low EMI design with power modules Nov. 20, 2017
Application note Working With QFN Power Modules (Rev. A) Jun. 08, 2017
Application note Power Module MSL Ratings Jan. 20, 2017
Technical article Industrial stack lights get smarter with LEDs Aug. 09, 2016
Application note LMZ35003 Protects Against 60-V Line Transients Jun. 18, 2015
Application note LMZ35003 Parallel Operation May 28, 2014
User guide Using the LMZ35003EVM Jul. 02, 2013

Design & development

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

Hardware development

document-generic User guide
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 preset (...)
  • Jumper selectable output voltage
  • Adjustable soft start
  • Adjustable turn-on UVLO

Design tools & simulation

SLVM669A.ZIP (40 KB) - PSpice Model
SLVMAF6.ZIP (74 KB) - PSpice Model
SNVM794.ZIP (1 KB) - PSpice Model
SNVM795.ZIP (5 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

EtherCAT P® One Cable for Power and EtherCAT® Reference Design
TIDA-01461 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 (...)
document-generic Schematic document-generic User guide
RGB LED Signal Tower With IO-Link Interface Reference Design
TIDA-00980 — 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 with (...)
document-generic Schematic document-generic User guide
RGB LED Signal Tower With Wi-Fi® Interface Reference Design
TIDA-00994 — 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 (...)
document-generic Schematic document-generic User guide
RGB LED Signal Tower for Industrial Automation Reference Design
TIDA-00979 — The TIDA-00979 TI 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 to change easily the amount of segments. With this smart process condition and safety indicator any type of (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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B1QFN (RKG) 41 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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