LMZ22008TZSLASHNOPB.B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 (350 kHz to 600

kHz)

• Current Sharing Capability

• 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

• Fully Enabled for WEBENCH® Power Designer

• Pin Compatible With LMZ22010/06,

LMZ12010/08/06, LMZ23610/08/06, and

LMZ13610/08/06

• Electrical Specifications

– 40-W Maximum Total Output Power

– Up to 8-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

– Low Radiated Emissions (EMI) Tested to

EN55022

– Only 7 External Components

– Low Output Voltage Ripple

– No External Heat Sink Required

– Simple Current Sharing for Higher Current

Applications

NOTE: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B,

tested on Evaluation Board with EMI configuration.

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 LMZ22008 SIMPLE SWITCHER® power module

is an easy-to-use step-down DC-DC solution capable of driving up to 8-A load. The LMZ22008 is available

in an innovative package that enhances thermal

performance and allows for hand or machine

soldering.

The LMZ22008 can accept an input voltage rail

between 6 V and 20 V and deliver an adjustable and

highly accurate output voltage as low as 0.8 V. The

LMZ22008 only requires two external resistors and external capacitors to complete the power solution.

The LMZ22008 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 allows start-up into a prebiased output.

The sync input allows synchronization over the 314- to 600-kHz switching frequency range and up to 6

modules can be connected in parallel for higher load

currents.