LMZ22003TZSLASHNOPB中文资料德州仪器数据手册PDF规格书

1 Features

1• 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

2 Applications

• Point-of-load Conversions from 12-V Input Rail

• Time-Critical Projects

• Space Constrained and High Thermal

Requirement Applications

• Negative Output Voltage Applications

(See AN-2027 SNVA425)

3 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.