LMZ12003DEMO/NOPB

www.ti.com Table of Contents User’s Guide LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's Guide Table of Contents 1 Description.............................................................................................................................................................................. 1 2 Packaging Highlights............................................................................................................................................................. 1 3 Demo Board Features.............................................................................................................................................................1 4 Typical Applications............................................................................................................................................................... 2 5 Demo Board Schematic......................................................................................................................................................... 3 6 Demo Board Bill of Materials (BOM)..................................................................................................................................... 4 7 Demo Board Hookup.............................................................................................................................................................. 4 8 Demo Board Passive Components....................................................................................................................................... 5 9 Performance Characteristics.................................................................................................................................................6 10 Revision History................................................................................................................................................................... 6 Trademarks SIMPLE SWITCHER® is a registered trademark of Texas Instruments. All trademarks are the property of their respective owners. 1 Description The LMZ12003 SIMPLE SWITCHER power module is a complete, easy to use, step-down DC-DC solution capable of driving up to 3-A load. The LMZ12003 is available in an innovative, easy-to-use package that enhances thermal performance and allows for hand or machine soldering. The LMZ12003 demo board can accept an input voltage rail between 4.5 V and 20 V and deliver an adjustable and highly accurate output voltage as low as 0.8 V. The LMZ12003 only requires three external resistors and four external capacitors to complete the power solution. The LMZ12003 is a reliable and robust solution with the following protection features: • Thermal shutdown • Input under-voltage lockout (UVLO) • Output over-voltage protection (OVP) • Short-circuit protection • Output current limit • Allows start-up into a pre-biased output A single resistor adjusts switching frequency up to 1 MHz. 2 Packaging Highlights • • • • • 7-lead module package (similar to TO-263) Single exposed die attach pad for enhanced thermal performance 10.2-mm × 13.8-mm × 4.6-mm module package High power density 1.7-inch × 2.3-inch reduced size demo board form factor 3 Demo Board Features • • • • • • 4.5-V to 20-V power input voltage range UVLO programmed at 4.5 V 0.8-V to 6-V adjustable output voltage range Up to 3-A output current Integrated shielded inductor in module Efficiency up to 92% SNVA427C – JANUARY 2010 – REVISED DECEMBER 2021 LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's Submit Document Feedback Guide Copyright © 2021 Texas Instruments Incorporated 1 Typical Applications • • • • • • • www.ti.com All ceramic capacitor design No loop compensation required Starts into pre-biased loads Short circuit protection Thermal shutdown Only nine external passives plus module 2-layer low-cost assembly 4 Typical Applications • • • • • Point-of-load conversions from 5-V and 12-V input rails Space constrained applications Industrial controls Telecom Networking equipment Figure 4-2. Back View Figure 4-1. Front View Table 4-1. Absolute Maximum Module Ratings VIN, RON to GND –0.3 V to 25 V EN, FB, SS to GND –0.3 V to 7 V Table 4-2. Module Operating Ratings VIN 4.5 V to 20 V EN (Input on pin 3 module pin) 0 V to 6.5 V Junction temperature range (TJ) –40°C to +125°C Table 4-3. Demo Board Operating Ratings 2 VIN 4.5 V to 20 V VOUT (Default setting) 1.8 V IOUT 0 A to 3 A EN (Input on demo board post) 0 V to 20 V LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's SNVA427C – JANUARY 2010 – REVISED DECEMBER 2021 Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Demo Board Schematic Table 4-3. Demo Board Operating Ratings (continued) UVLO setting on Enable input 4.5 V Soft-start time 2.2 mS Operating temperature range (TJ) –40°C to +70°C (at full 3-A load) 5 Demo Board Schematic U1 EP Enable VIN VOUT FB 1.8VO @ 3A 7 GND SS 6 5 VIN EN 4 3 2 1 RON LMZ12003TZ-ADJ 4.5V to 20V RENT CFF 32.4k 0.022 PF RFBT RON 32.4k RENB 11.8k CIN1 10 PF 1.87k CSS 0.022 PF RFBB 1.50k CO1 CO2 1 PF 100 PF SNVA427C – JANUARY 2010 – REVISED DECEMBER 2021 LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's Submit Document Feedback Guide Copyright © 2021 Texas Instruments Incorporated 3 Demo Board Bill of Materials (BOM) www.ti.com 6 Demo Board Bill of Materials (BOM) Table 6-1. Board Bill of Materials (BOM) Ref Des Description Case Manufacturer Part Number Ron 32.4 kΩ 1% resistor 603 Rent 32.4 kΩ 1% resistor 603 Renb 11.8 kΩ 1% resistor 603 Rfbt 1.87 kΩ 1% resistor 603 Rfbb 1.50 kΩ 1% resistor 603 Cff 0.022-μF, 50-V, X7R ceramic capacitor 603 Css 0.022-μF, 50-V, X7R ceramic capacitor 603 Cin 10-μF, 50-V, X5R ceramic capacitor 1210 UMK325BJ106MM-T Cout1 1.0-μF, 50-V, X7R ceramic capacitor 1206 UMK316B7105KL-T Cout2 100-μF, 6.3-V, X5R ceramic capacitor 1210 JMK325BJ107MM-T U1 LMZ12003 SIMPLE SWITCHER Power Module TO-PMOD LMZ12003TZ-ADJ Alternate resistor values for alternative output voltages VOUT RFBT RFBB RON 6 2.49 k 383 Ω 124 k 5 5.62 k 1.07 k 100 k 3.3 3.32 k 1.07 k 61.9 k 2.5 2.26 k 1.07 k 47.5 k 1.8 1.87 k 1.50 k 32.4 k 1.5 1.00 k 1.13 k 28.0 k 1.2 4.22 k 8.45 k 22.6 k 0.8 0.0 K 39.2 k 24.9 k 7 Demo Board Hookup VOUT: Connect the load to VOUT and one of the GND posts. The module can source up to a 3-A load current. Connect VIN to a positive voltage in the 4.5-V to 20-V range. Connect the negative terminal of the source supply to one of the posts labeled GND. The Enable input post is configured for direct connection to the VIN post. With the chosen resistor values, this results in an undervoltage lockout level of 4.5-V input. The top enable resistor is RENT (aka REN1) and the bottom enable resistor is RENB (aka REN2). If the Enable post is disconnected, the module will be disabled and about 20 μA of supply current will flow from VIN to ground while in the disabled mode. With the enable input connected to VIN through the resistor divider, there will be about 1.5 mA of no-load quiescent current into the VIN input. Additional current flows into the enable divider string. 4 LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's SNVA427C – JANUARY 2010 – REVISED DECEMBER 2021 Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Demo Board Passive Components 8 Demo Board Passive Components Soft-start capacitor: The soft-start capacitor controls the rise time of the output voltage when power is first applied and following the clearing of a fault mode. Feedback divider: Regulator output voltage is programmed though the selection of the two resistors, RFBT (aka RFB1) and RFB (aka RFB2). A feedforward capacitor (CFF) is located in parallel with the upper feedback divider resistor. This capacitor improves the step response to abrupt changes in load current. For a different output voltage, see Table 6-1 when modifying the board. Resistor values shown will minimize error in output voltage setting. RON Resistor: The primary function of the RON resistor is to set the on-time interval of the internal control section switching cycle. The secondary function of the RON resistor is to create a nearly constant operating frequency over the input operating voltage range. If the output voltage of the regulator is changed by adjusting the feedback divider, then it is generally required that the RON resistor value also be changed in order to maintain the same operating frequency. Cout: A parallel connection of a 1-µF, 50-V and a 100-µF, 6.3-V multilayer ceramic are used for the output capacitor. Locations are provided on the PCB assembly for experimenting with additional output capacitors.. Cin: A 10-μF, 50-V multilayer ceramic is connected as the input filter. Locations are provided on the PCB assembly for experimenting with additional input capacitors. SNVA427C – JANUARY 2010 – REVISED DECEMBER 2021 LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's Submit Document Feedback Guide Copyright © 2021 Texas Instruments Incorporated 5 Performance Characteristics www.ti.com 9 Performance Characteristics 2.5 100 95 2 5.0 3.3 2.5 85 80 DISSIPATION (W) EFFICIENCY (%) 90 1.8 1.5 1.2 75 70 0.8 65 5.0 3.3 2.5 1.5 1.8 1 1.5 1.2 0.8 0.5 60 25° C 55 25° C 50 0 0 0.5 1 1.5 3 2.5 2 0.5 0 1 1.5 2 2.5 3 OUTPUT CURRENT (A) OUTPUT CURRENT(A) Figure 9-2. Dissipation, 12 V Input at 25°C Figure 9-1. Efficiency, 12 V Input at 25°C OUTPUT VOLTAGE (V) 1.83 1.825 1.82 5.5 1.815 20 12 6 1.81 5 1.805 25°C 1.8 0 0.5 4.75 4.5 5.25 1 1.5 2 2.5 3 OUTPUT CURRENT (A) Figure 9-3. Line and Load Regulation at 25°C 10 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision B (April 2013) to Revision C (December 2021) Page • Updated the numbering format for tables, figures, and cross-references throughout the document..................1 • Updated the user's guide title............................................................................................................................. 1 • Edited the user's guide for clarity........................................................................................................................1 6 LMZ12003 SIMPLE SWITCHER® Power Module Evaluation Module User's SNVA427C – JANUARY 2010 – REVISED DECEMBER 2021 Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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