LMZ22003数据手册电源-板安装的直流转换器规格书PDF

描述 Description

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.

特性 Features

• 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
• Low Component Count, Only 5 External Components
• Low Output Voltage Ripple
• Uses PCB as Heat Sink, No Airflow Required