Integrated Shielded Inductor
Simple PCB Layout
Frequency Synchronization Input (650 kHz to 950
kHz)
Flexible Start-up Sequencing Using External Soft-
Start, Tracking and Precision Enable
Protection Against Inrush Currents and Faults
such as Input UVLO and Output Short Circuit
Junction Temperature Range –40°C to 125°C
Single Exposed Pad and Standard Pinout for
Easy Mounting and Manufacturing
Fast Transient Response for Powering FPGAs
and ASICs
Fully Enabled for WEBENCH^® Power Designer
Pin Compatible With
LMZ23605/LMZ23603/LMZ22005
Electrical Specifications
- 18-W Maximum Total Output Power
- Up to 3-A Output Current
- Input Voltage Range 6 V to 20 V
- Output Voltage Range 0.8 V to 6 V
- Efficiency up to 92%
Performance Benefits
- High Efficiency Reduces System Heat
  Generation
- Tested To EN55022 Class B⁽¹⁾
- Low Component Count, Only 5 External
  Components
- Low Output Voltage Ripple
- Uses PCB as Heat Sink, No Airflow Required

Integrated Shielded Inductor
Simple PCB Layout
Frequency Synchronization Input (650 kHz to 950
kHz)
Flexible Start-up Sequencing Using External Soft-
Start, Tracking and Precision Enable
Protection Against Inrush Currents and Faults
such as Input UVLO and Output Short Circuit
Junction Temperature Range –40°C to 125°C
Single Exposed Pad and Standard Pinout for
Easy Mounting and Manufacturing
Fast Transient Response for Powering FPGAs
and ASICs
Fully Enabled for WEBENCH^® Power Designer
Pin Compatible With
LMZ23605/LMZ23603/LMZ22005
Electrical Specifications
- 18-W Maximum Total Output Power
- Up to 3-A Output Current
- Input Voltage Range 6 V to 20 V
- Output Voltage Range 0.8 V to 6 V
- Efficiency up to 92%
Performance Benefits
- High Efficiency Reduces System Heat
  Generation
- Tested To EN55022 Class B⁽¹⁾
- Low Component Count, Only 5 External
  Components
- Low Output Voltage Ripple
- Uses PCB as Heat Sink, No Airflow Required

The LMZ22003 SIMPLE SWITCHER power module is an easy-to-use step-down DC-DC solution capable of driving up to 3-A load. The LMZ22003 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ22003 can accept an input voltage rail between 6 V and 20 V and can deliver an adjustable and highly accurate output voltage as low as 0.8 V. The LMZ22003 only requires two external resistors and three external capacitors to complete the power solution. The LMZ22003 is a reliable and robust design with the following protection features: thermal shutdown, programmable input undervoltage lockout, output overvoltage protection, short circuit protection, output current limit, and this device allows start-up into a prebiased output. The sync input allows synchronization over the 650- to 950-kHz switching frequency range.

The LMZ22003 SIMPLE SWITCHER power module is an easy-to-use step-down DC-DC solution capable of driving up to 3-A load. The LMZ22003 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ22003 can accept an input voltage rail between 6 V and 20 V and can deliver an adjustable and highly accurate output voltage as low as 0.8 V. The LMZ22003 only requires two external resistors and three external capacitors to complete the power solution. The LMZ22003 is a reliable and robust design with the following protection features: thermal shutdown, programmable input undervoltage lockout, output overvoltage protection, short circuit protection, output current limit, and this device allows start-up into a prebiased output. The sync input allows synchronization over the 650- to 950-kHz switching frequency range.

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Technical documentation

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	Type	Title		Date
*	Data sheet	LMZ22003 3-A SIMPLE SWITCHER® Power Module With 20-V Maximum Input Voltage datasheet (Rev. I)	PDF \| HTML	31 Jul 2015
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	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
	User guide	AN-2085 LMZ23605/03, LMZ22005/03 Evaluation Board (Rev. B)		24 Apr 2013
	User guide	AN-2125 LMZ23605/03, LMZ22005/03 Demonstration Board (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
	Application note	Understanding and Applying Current-Mode Control Theory		19 Aug 2007
	More literature	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		12 Jul 2005

Design & development

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Evaluation board

LMZ22003EVAL — 3A SIMPLE SWITCHER® Power Module with 20V Maximum Input Voltage Evaluation Board

The LMZ23605/03, LMZ22005/03 evaluation boards are designed to be an easy-to-use platform to evaluate the full capabilities of this family of SIMPLE SWITCHER® power modules. The PCB construction has excellent thermal performance and includes extra locations for optional components that may not be (...)

User guide: PDF