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LMZ10503

ACTIVE

5.5V, 3A Power Module in Leaded Surface Mount TO Package

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Data sheet

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LMZ10503

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Synchronous Buck Type Module Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Vout (min) (V) 0.8 Vout (max) (V) 5 Switching frequency (min) (kHz) 750 Switching frequency (max) (kHz) 1160 Features EMI Tested, Enable, Tracking Control mode Voltage mode Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Synchronous Buck Type Module Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Vout (min) (V) 0.8 Vout (max) (V) 5 Switching frequency (min) (kHz) 750 Switching frequency (max) (kHz) 1160 Features EMI Tested, Enable, Tracking Control mode Voltage mode Duty cycle (max) (%) 100
TO-PMOD (NDW) 7 139.9032 mm² 10.16 x 13.77
  • 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
    • LMZ10504 (4 A / 20 W Maximum)
    • LMZ10505 (5 A / 25 W Maximum)
  • Electrical Specifications
    • 15-W Maximum Total Output Power
    • Up to 3-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
    • High Efficiency up to 96% Reduces System Heat Generation
    • Low Radiated Emissions (EMI) Tested to EN55022 Class B Standard (EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See Table 9 and layout information for more regarding device under test.)
    • Fast Transient Response for Powering FPGAs and ASICs
  • Create a Custom Design Using the LMZ10503 With the WEBENCH® Power Designer
  • 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
    • LMZ10504 (4 A / 20 W Maximum)
    • LMZ10505 (5 A / 25 W Maximum)
  • Electrical Specifications
    • 15-W Maximum Total Output Power
    • Up to 3-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
    • High Efficiency up to 96% Reduces System Heat Generation
    • Low Radiated Emissions (EMI) Tested to EN55022 Class B Standard (EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See Table 9 and layout information for more regarding device under test.)
    • Fast Transient Response for Powering FPGAs and ASICs
  • Create a Custom Design Using the LMZ10503 With the WEBENCH® Power Designer

The LMZ10503 power module is a complete, easy-to-use DC-DC solution capable of driving up to a 3-A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. The LMZ10503 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ10503 can accept an input voltage rail between 2.95 V and 5.5 V and can deliver an adjustable and highly accurate output voltage as low as 0.8 V. One megahertz 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 and/or electrolytic output capacitors. Externally programmable soft-start capacitor facilitates controlled startup. The LMZ10503 is a reliable and robust solution with the following features: lossless cycle-by-cycle peak current limit to protect for over current or short-circuit fault, thermal shutdown, input undervoltage lockout, and prebiased start-up.

The LMZ10503 power module is a complete, easy-to-use DC-DC solution capable of driving up to a 3-A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. The LMZ10503 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ10503 can accept an input voltage rail between 2.95 V and 5.5 V and can deliver an adjustable and highly accurate output voltage as low as 0.8 V. One megahertz 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 and/or electrolytic output capacitors. Externally programmable soft-start capacitor facilitates controlled startup. The LMZ10503 is a reliable and robust solution with the following features: lossless cycle-by-cycle peak current limit to protect for over current or short-circuit fault, thermal shutdown, input undervoltage lockout, and prebiased start-up.
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Technical documentation

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Type Title Date
* Data sheet LMZ10503 3-A Power Module With 5.5-V Maximum Input Voltage datasheet (Rev. L) PDF | HTML 15 Apr 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note AN-2013 LMZ1050x/LMZ1050xEXT SIMPLE SWITCHER Power Module (Rev. E) 02 Feb 2017
Application note Design Summary LMZ1xxx and LMZ2xxx Power Module Family (Rev. B) 20 Jan 2016
Application note AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER Power Module (Rev. A) 06 May 2013
EVM User's guide AN-2022 LMZ1050x Evaluation Board (Rev. D) 24 Apr 2013
User guide LMZ10503/04 Demo Board SIMPLE SWITCHER Power Module Quick Start Guide (Rev. B) 24 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2026 Effect of PCB Design on Thermal Performance of SIMPLE SWITCHER Modules (Rev. A) 23 Apr 2013
Application note AN-2052 Texas Instruments SIMPLE SWITCHER Power Modules and EMI (Rev. C) 23 Apr 2013
Application note AN-2078 PCB Layout for Texas Instruments SIMPLE SWITCHER Power Modules (Rev. A) 23 Apr 2013
More literature SIMPLE SWITCHER® Power Modules for Broadcast Video 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Communications Infrastructure 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Factory Automation 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Medical 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Military 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Test and Measurement 02 Apr 2012
Design guide SIMPLE SWITCHER® Design Guide 11 Apr 2011
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005

Design & development

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

Simulation model

LMZ10503 PSpice Average Model

SNVM288.ZIP (47 KB) - PSpice Model
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Simulation model

LMZ10503 PSpice Transient Model

SNVM287.ZIP (163 KB) - PSpice Model
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Simulation model

LMZ10503 Unencrypted PSpice Average Model

SNVM736.ZIP (1 KB) - PSpice Model
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Simulation model

LMZ10503 Unencrypted PSpice Transient Model

SNVM735.ZIP (2 KB) - PSpice Model
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Calculation tool

LMZ1X-LMZXEXTDESIGN-CALC — LMZ1x/EXT Thermal Resistance Estimate

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