SNVS716H March   2011  – February 2016 LMZ12008

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specification
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Overvoltage Protection
      2. 7.3.2 Current Limit
      3. 7.3.3 Thermal Protection
      4. 7.3.4 Prebiased Start-Up
    4. 7.4 Device Functional Modes
      1. 7.4.1 Discontinuous Conduction and Continuous Conduction Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Enable Divider, RENT, RENB and RENH Selection
        2. 8.2.2.2 Output Voltage Selection
        3. 8.2.2.3 Soft-Start Capacitor Selection
        4. 8.2.2.4 Tracking Supply Divider Option
        5. 8.2.2.5 COUT Selection
        6. 8.2.2.6 CIN Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Power Dissipation and Thermal Considerations
    4. 10.4 Power Module SMT Guidelines
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Integrated Shielded Inductor
  • Simple PCB Layout
  • Fixed Switching Frequency (350kHz)
  • 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 LMZ22010/08/06, LMZ12010/06, 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
EN 55022:2006, +A1:2007, FCC Part 15 Subpart B, tested on Evaluation Board with EMI configuration
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 / High Thermal Requirement Applications
  • Negative Output Voltage Applications
    See AN-2027 SNVA425.

3 Description

The LMZ12008 SIMPLE SWITCHER® power module is an easy-to-use step-down DC-DC solution capable of driving up to 8-A load. The LMZ12008 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ12008 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 LMZ12008 only requires two external resistors and external capacitors to complete the power solution. The LMZ12008 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 the device allows start-up into a prebiased output.

Device Information(1)(2)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMZ12008 NDY (11) 15.00 mm × 15.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.
  2. Peak reflow temperature equals 245°C. See SNAA214 for more details.

Simplified Application Schematic

LMZ12008 12008_SSch.gif

Efficiency 3.3-V Output at 25°C

LMZ12008 30155736.gif