4-A Power module with 5.5-V maximum input voltage for military and rugged applications


Product details


Iout (Max) (A) 4 Vin (Min) (V) 2.95 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 5 Soft start Adjustable Features EMI Tested, Enable, Tracking Operating temperature range (C) -55 to 125 Iq (Typ) (mA) 1.7 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1160 Switching frequency (Min) (kHz) 700 Switching frequency (Typ) (kHz) 1000 Duty cycle (Max) (%) 100 Type Module Topology Buck, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

TO-PMOD (NDW) 7 140 mm² 10.16 x 13.77 open-in-new Find other Buck modules (integrated inductor)


  • Integrated Shielded Inductor
  • Flexible Start-up Sequencing Using External Soft Start, Tracking, and Precision Enable
  • Protection Against In-Rush Currents and Faults Such as Input UVLO and Output Short-Circuit
  • Single Exposed Pad and Standard Pinout for Easy Mounting and Manufacturing
  • Pin-to-Pin Compatible With
    • LMZ10503EXT (3-A/15-W Maximum)
    • LMZ10505EXT (5-A/25-W Maximum)
  • Fast Transient Response for Powering FPGAs and ASICs
  • Electrical Specifications
    • 20-W Maximum Total Output Power
    • Up to 4-A Output Current
    • Input Voltage Range 2.95 V to 5.5 V
    • Output Voltage Range 0.8 V to 5 V
    • ±1.63% Feedback Voltage Accuracy Over Temperature
  • Performance Benefits
    • Operates at High Ambient Temperatures
    • Low Radiated Emissions (EMI) Tested to EN55022 Class B Standard
    • Passes 10-V/m Radiated Immunity EMI Tested to Standard EN61000 4-3
    • Passes Vibration Standard
      • MIL-STD-883 Method 2007.2 Condition A
      • JESD22-B103B Condition 1
    • Passes Drop Standard
      • MIL-STD-883 Method 2002.3 Condition B
      • JESD22-B110 Condition B
  • Create a Custom Design Using the LMZ10504 With the WEBENCH® Power Designer

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


The LMZ10504EXT power module is a complete, easy-to-use, DC-DC solution capable of driving up to a 4-A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. The LMZ10504EXT is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ10504EXT can accept an input voltage rail between 2.95 V and 5.5 V, and deliver an adjustable and highly accurate output voltage as low as 0.8 V. 1-MHz fixed-frequency PWM switching provides a predictable EMI characteristic. Two external compensation components can be adjusted to set the fastest response time, while allowing the option to use ceramic or electrolytic output capacitors. Externally programmable soft-start capacitor facilitates controlled start-up. The LMZ10504EXT is a reliable and robust solution with the following features: lossless cycle-by-cycle peak current limit to protect for overcurrent or short-circuit fault, thermal shutdown, input undervoltage lockout, and prebiased start-up. The LMZ10504EXT is also fully-enabled for WEBENCH® and Power Designer tools.

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

Technical documentation

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Type Title Date
* Datasheet LMZ10504EXT 4-A Power Module With 5.5-V Maximum Input Voltage for Demanding and Rugged Applications datasheet (Rev. J) Apr. 15, 2019
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application notes AN-2013 LMZ1050x/LMZ1050xEXT SIMPLE SWITCHER Power Module (Rev. E) Feb. 02, 2017
Application notes Design Summary LMZ1xxx and LMZ2xxx Power Module Family (Rev. B) Jan. 20, 2016
Application notes AN-2013 LMZ1050x/LMZ1050xEXT SIMPLE SWITCHER Power Module (Rev. D) Sep. 17, 2015
Application notes AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER Power Module (Rev. A) May 06, 2013
User guides AN-2074 LMZ1050xEXT Evaluation Board (Rev. B) Apr. 24, 2013
Application notes AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr. 23, 2013
Application notes AN-2026 Effect of PCB Design on Thermal Performance of SIMPLE SWITCHER Modules (Rev. A) Apr. 23, 2013
Application notes AN-2052 Texas Instruments SIMPLE SWITCHER Power Modules and EMI (Rev. C) Apr. 23, 2013
Application notes AN-2078 PCB Layout for Texas Instruments SIMPLE SWITCHER Power Modules (Rev. A) Apr. 23, 2013
User guides SIMPLE SWITCHER® Design Guide Apr. 11, 2011
Application notes Understanding and Applying Current-Mode Control Theory Aug. 19, 2007
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005
Application notes AN-643 EMI/RFI Board Design (Rev. B) May 03, 2004

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 SIMPLE SWITCHER power module evaluation board is optimized for peak performance and increased flexibility. By incorporating additional ceramic and an aluminum filter capacitor, the power module EVAL board demonstrates the low output ripple, fast transient response, and low conducted and radiated (...)

  • Integrated shielded inductor (inside the module)
  • Efficiency
    • Up to 96% (LMZ10504)
  • 2.5V output (output voltage is adjustable by changing 1 or 2 resistors)
  • Thermal performance
    • θJA = 20°C/W
    • θJC = 1.9°C/W
  • Uses 0805 passives on front side for easy modification of values to match requirements
  • 2.25" x 2.25" (5.8 cm x (...)

Design tools & simulation

LMZ1x/EXT Thermal Resistance Estimate

CAD/CAE symbols

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TO-PMOD (NDW) 7 View options

Ordering & quality

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