Sample & Support & Product Tools & Technical Community Buy Folder Documents Software LMZ23603 SNVS711JMARCH 2011REVISED AUGUST 2015 LMZ23603 3-A SIMPLE SWITCHER Power Module With 36-V Maximum Input Voltage 1 1 Features Integrated Shielded Inductor 2 Applications Simple PCB Layout Point-of-load Conversions from 12-V and 24-V Frequency Synchronization Input (650 kHz to 950 Input Rail kHz) Time-Critical Projects Flexible Startup Sequencing Using External Soft- Space Constrained and High Thermal start, Tracking and Precision Enable Requirement Applications Protection Against Inrush Currents and Faults Negative Output Voltage Applications (See AN- Such as Input UVLO and Output Short Circuit 2027, SNVA425) Junction Temperature Range 40C to 125C 3 Description Single Exposed Pad and Standard Pinout for Easy The LMZ23603 SIMPLE SWITCHER power module Mounting and Manufacturing is an easy-to-use step-down DC-DC solution capable Fast Transient Response for Powering FPGAs of driving up to 3-A load. The LMZ23603 is available and ASICs in an innovative package that enhances thermal Fully Enabled for WEBENCH Power Designer performance and allows for hand or machine soldering. Pin Compatible With LMZ22005/LMZ23605/LMZ22003 The LMZ23603 can accept an input voltage rail Performance Benefits between 6 V and 36 V and deliver an adjustable and highly accurate output voltage as low as 0.8 V. The High Efficiency Reduces System Heat LMZ23603 only requires two external resistors and Generation three external capacitors to complete the power Tested to EN55022 Class B solution. The LMZ23603 is a reliable and robust See AN-2125 (SNVA473) and layout for design with the following protection features: thermal information on device under test. shutdown, programmable input undervoltage lockout, output overvoltage protection, short circuit protection, V = 24 V, V = 3.3 V, I = 3 A IN O O output current limit, and allows start-up into a NOTE: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. prebiased output. The sync input allows Low component count, only 5 external synchronization over the 650-kHz to 950-kHz switching frequency range. components Low output voltage ripple (1)(2) Device Information Uses PCB as heat sink, no airflow required PART NUMBER PACKAGE BODY SIZE (NOM) Electrical Specifications LMZ23603 NDW (7) 10.16 mm 9.85 mm 18-W maximum total output power (1) For all available packages, see the orderable addendum at Up to 3-A output current the end of the data sheet. (2) Peak reflow temperature equals 245C. See SNAA214 for Input voltage range 6 V to 36 V more details. Output voltage range 0.8 V to 6 V Efficiency up to 92% Simplified Application Schematic Efficiency 5-V Output at 25C Ambient 100 LMZ23603 90 VIN 80 VOUT 3A 70 R FBT 60 9 VIn Enable 12 Vin See Table 20 Vin 50 24 Vin C R Co SS FBB CIN 30 Vin 220 PF 0.47 PF See Table 36 Vin 22 PF 40 0 1 2 3 OUTPUT CURRENT (A) 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. VIN SYNC EN AGND PGND FB SS/TRK VOUT EFFICIENCY (%)LMZ23603 SNVS711JMARCH 2011REVISED AUGUST 2015 www.ti.com Table of Contents 1 Features.................................................................. 1 8 Application and Implementation........................ 17 8.1 Application Information............................................ 17 2 Applications........................................................... 1 8.2 Typical Application ................................................. 17 3 Description............................................................. 1 9 Power Supply Recommendations...................... 23 4 Revision History..................................................... 2 10 Layout................................................................... 23 5 Pin Configuration and Functions......................... 3 10.1 Layout Guidelines................................................. 23 6 Specifications......................................................... 3 10.2 Layout Examples................................................... 24 6.1 Absolute Maximum Ratings...................................... 3 10.3 Power Dissipation and Thermal Considerations... 25 6.2 ESD Ratings.............................................................. 4 10.4 Power Module SMT Guidelines............................ 26 6.3 Recommended Operating Conditions....................... 4 11 Device and Documentation Support................. 27 6.4 Thermal Information.................................................. 4 11.1 Device Support...................................................... 27 6.5 Electrical Characteristics........................................... 4 11.2 Documentation Support........................................ 27 6.6 Typical Characteristics.............................................. 6 11.3 Community Resources.......................................... 27 7 Detailed Description............................................ 14 11.4 Trademarks........................................................... 27 7.1 Overview................................................................. 14 11.5 Electrostatic Discharge Caution............................ 27 7.2 Functional Block Diagram....................................... 14 11.6 Glossary................................................................ 27 7.3 Feature Description................................................. 14 12 Mechanical, Packaging, and Orderable 7.4 Device Functional Modes........................................ 16 Information........................................................... 28 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision I (October 2013) to Revision J Page Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1 Deleted Easy-to-Use PFM 7-Pin Package image.................................................................................................................. 1 Changes from Revision H (April 2013) to Revision I Page Deleted 12 mil......................................................................................................................................................................... 4 Changed 10 mil.................................................................................................................................................................... 23 Changed 10 mil.................................................................................................................................................................... 26 Added Power Module SMT Guidelines................................................................................................................................. 26 2 Submit Documentation Feedback Copyright 20112015, Texas Instruments Incorporated Product Folder Links: LMZ23603