LMZ12001EVAL/NOPB

User's Guide SNVA422E – January 2010 – Revised April 2013 AN-2024 LMZ1420x / LMZ1200x Evaluation Board 1 Introduction The LMZ1420x and LMZ1200x SIMPLE SWITCHER® power modules are easy-to-use DC-DC solution capable of driving up to a 3A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. They are available in an innovative package that enhances thermal performance and allows for hand or machine soldering. The LMZ14203/2/1 can accept an input voltage rail between 6V and 42V and the LMZ12003/2/1 can accept an input voltage rail between 4.5V and 20V. The devices can deliver an adjustable and highly accurate output voltage as low as 0.8V and as high as 6V. The control structure is constant on-time with input voltage feed forward. This creates a nearly constant switching frequency across the input voltage range. The control loop operates well with low ESR output capacitors such as ceramics. An output feedforward capacitor across the upper feedback resistor trims for optimum transient response. The precision enable input allows for programmable UVLO of the input supply. The external soft-start capacitor facilitates controlled startup output rise time. The LMZ1420x and LMZ1200x family is a reliable and robust solution with the following features: lossless cycle-by-cycle valley current limit to protect for over current or short-circuit fault, thermal shutdown, input under-voltage lock-out, and will start up into a pre-biased output. 2 Board Specifications • • • • • • • • • • • LMZ1420x VIN = 6V to 42V LMZ1420x enable UVLO = 8V LMZ1420x VOUT = 3.3V LMZ1200x VIN = 4.5V to 20V LMZ1200x enable UVLO = 4.5V LMZ1200x VOUT = 1.8V Operates at full load up to 80°C ambient at 12V input θJA = 20°C / W, θJC = 1.9°C / W Designed on four layers, all four layers are 1 oz. copper weight The two internal ground planes are identical Measures 1.705 in. x 3.03 in. (4.33 cm x 7.7cm) and is 62mil (.062”) thick of FR4 laminate material For additional circuit modifications see the Design Consideration section in the device-specific data sheet. For negative output voltage connections, see AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER® Power Module (SNVA425). SIMPLE SWITCHER is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners. SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback AN-2024 LMZ1420x / LMZ1200x Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 1 Additional Footprints 3 www.ti.com Additional Footprints Additional component mounting pads are available to experiment with alternative Cin and Cout combinations or a zener clamp on the enable input. for corresponding schematic locations, see Figure 6. Figure 1. Evaluation Board Schematic (LMZ12003 1.8V application values shown in parentheses) Table 1. LMZ1420x Bill of Materials (BOM), VIN = 8V to 42V, VOUT = 3.3V, IOUT (MAX) = 3A / 2A / 1A 2 Designator Description Case Size Manufacturer Manufacturer P/N Quantity U1 SIMPLE SWITCHER® PFM-7 Texas Instruments LMZ14203 or LMZ14202 or LMZ14201 1 CIN4, CO1 1 µF, X7R, 50V 1206 Taiyo Yuden UMK316B7105KL-T 2 CIN2 10 µF, X5R, 50V 1210 Taiyo Yuden UMK325BJ106MM-T 1 CO2 100 µF, X5R, 6.3V 1210 Taiyo Yuden JMK325BJ107MM-T 1 CSS, CFF 0.022 µF, X7R, 100V 0805 AVX 08051C223JAT2A 2 RENB 11.8k 0805 Panasonic ERJ-6ENF1182V 1 RENT 68.1 kΩ 0805 Panasonic ERJ-6ENF6812V 1 RFBT 3.32 kΩ 0805 Vishay-Dale CRCW08053K32FKEA 1 RFBB 1.07 kΩ 0805 Panasonic CRCW080534K8FKEA 1 RON 61.9 kΩ 0805 Panasonic ERJ-6ENF6192V 1 AN-2024 LMZ1420x / LMZ1200x Evaluation Board SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com Table 2. LMZ1200x Bill of Materials (BOM), VIN = 4.5 to 20V, VOUT = 1.8V, IOUT (MAX) = 3A / 2A / 1A 4 Designator Description Case Size Manufacturer Manufacturer P/N Quantity U1 SIMPLE SWITCHER® PFM-7 Texas Instruments LMZ12003 or LMZ12002 or LMZ12001 1 CIN4, CO1 1 µF, X7R, 50V 1206 Taiyo Yuden UMK316B7105KL-T 2 CIN2 10 µF, X5R, 50V 1210 Taiyo Yuden UMK325BJ106MM-T 1 CO2 100 µF, X5R, 6.3V 1210 Taiyo Yuden JMK325BJ107MM-T 1 CSS, CFF 0.022 µF, X7R, 100V 0805 AVX 08051C223JAT2A 2 RENB 11.8k 0805 Panasonic ERJ-6ENF1182V 1 RENT 32.4KΩ 0805 Panasonic ERJ-6ENF3242V 1 RFBT 1.87 kΩ 0805 Vishay-Dale CRCW08051K87FKEA` 1 RFBB 1.50 kΩ 0805 Panasonic CRCW08051K50FKEA 1 RON 32.4KΩ 0805 Panasonic ERJ-6ENF3242V 1 Performance Characteristics LMZ14203 Load Regulation LMZ12003 Load Regulation 3.36 1.83 1.825 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3.34 3.32 20 42 36 3.3 8 6 12 15 3.28 1.82 20 6 1.81 5 1.805 25°C 25°C 0 0.5 1 1.5 2 2.5 0 3 0.5 1 1.5 2 2.5 3 OUTPUT CURRENT (A) OUTPUT CURRENT (A) LMZ14203 Efficiency LMZ12003 Efficiency 100 100 95 95 6 8 12 15 20 90 EFFICIENCY (%) EFFICIENCY (%) 4.75 4.5 5.25 1.8 3.26 12 5.5 1.815 85 36 80 5 90 6 12 85 80 20 25°C VOUT = 3.3V 75 0 0.5 1 1.5 2 2.5 3 0 OUTPUT CURRENT (A) SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback VOUT = 1.8V 25°C 75 0.5 1 1.5 2 2.5 3 OUTPUT CURRENT (A) AN-2024 LMZ1420x / LMZ1200x Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 3 Performance Characteristics www.ti.com LMZ14202 Efficiency LMZ12002 Efficiency 100 100 6 8 12 20 24 80 5 90 EFFICIENCY (%) EFFICIENCY (%) 90 36 42 70 60 6 8 80 12 70 20 60 VOUT = 3.3V 25°C 50 0 0.4 0.8 1.2 1.6 2 0.4 0 OUTPUT CURRENT (A) LMZ14201 Efficiency 2 1.6 LMZ12001 Efficiency 6 8 12 20 80 24 70 5 90 EFFICIENCY (%) EFFICIENCY (%) 1.2 100 90 36 6 8 80 12 70 20 42 60 60 0 0.2 0.4 VOUT = 1.8V 25°C VOUT = 3.3V 25°C 50 0.6 0.8 OUTPUT CURRENT (A) LMZ14203 Thermal Derating 4 0.8 OUTPUT CURRENT (A) 100 50 VOUT = 1.8V 25°C 50 AN-2024 LMZ1420x / LMZ1200x Evaluation Board 1 0 0.2 0.4 0.6 0.8 1 OUTPUT CURRENT (A) LMZ12003 Thermal Derating SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com LMZ14202 Thermal Derating LMZ12002 Thermal Derating 2.5 12VIN 2 6VIN 36VIN 1.5 24VIN 1 JA = 19.6°C/W 0.5 2 OUTPUT CURRENT (A) OUTPUT CURRENT (A) 2.5 12VIN 1.5 20VIN 1 0.5 VOUT = 3.3V 0 50 60 70 80 VOUT = 1.8V 90 0 50 100 110 120 60 AMBIENT TEMPERATURE (°C) 90 100 110 120 LMZ12001 Thermal Derating 1 OUTPUT CURRENT (A) OUTPUT CURRENT (A) 80 1.2 1 0.8 6 VIN 0.6 12 VIN 0.4 JA = 19.6°C/W 24 VIN 0.2 4.5 Vin 0.8 12 Vin 0.6 20 Vin 0.4 ÆJA = 19.6°C/W 0.2 VOUT = 3.3V 0 50 60 70 36 VIN 80 90 VOUT = 1.8V 0 50 100 110 120 60 70 80 90 100 110 120 AMBIENT TEMPERATURE (C) AMBIENT TEMPERATURE (°C) 5.5 70 AMBIENT TEMPERATURE (°C) LMZ14201 Thermal Derating 1.2 4.5VIN JA = 19.6°C/W LMZ14203 Current Limit VOUT = 3.3V 6 LMZ12003 Current Limit VOUT = 1.8V SHORT CIRCUIT 5.5 OUTPUT CURRENT (A) OUTPUT CURRENT (A) 5 4.5 ONSET 4 3.5 SHORT CIRCUIT 5 4.5 ONSET 4 3.5 25°C 25°C 3 0 10 30 20 40 50 3 0 INPUT VOLTAGE (V) SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback 5 10 15 20 25 INPUT VOLTAGE (V) AN-2024 LMZ1420x / LMZ1200x Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 5 Performance Characteristics www.ti.com LMZ14202 Current LimitVOUT = 3.3V LMZ12002 Current Limit VOUT = 1.8V 3.5 3.5 OUTPUT CURRENT (A) OUTPUT CURRENT (A) 3.3 SHORT CIRCUIT 3.1 2.9 ONSET 3.3 3.1 SHORT CIRCUIT 2.9 ONSET 2.7 2.7 25°C 25°C 2.5 2.5 0 10 20 30 40 50 5 0 10 15 20 25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) LMZ14201 Current Limit VOUT = 3.3V LMZ12001 Current Limit VOUT = 1.8V 2.4 2.4 2.3 2.3 2.2 CURRENT (A) CURRENT (A) SHORT CIRCUIT 2.1 ONSET 2.0 1.9 2.2 SHORT CIRCUIT 2.1 2.0 ONSET 1.9 25°C 25°C 1.8 1.8 0 10 20 30 40 50 5 0 INPUT VOLTAGE (V) LMZ14203 Startup VIN = 12V 10 15 20 25 INPUT VOLTAGE (V) LMZ12003 Startup VIN = 12V ENABLE ENABLE VOUT = 3.3V @ 3A VOUT = 1.8V @ 3A 1.00 ms/DIV 6 AN-2024 LMZ1420x / LMZ1200x Evaluation Board 1.00 ms/DIV SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com LMZ14203 Output Ripple VOUT = 3.3V IOUT = 3A, BW = 200 MHz SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback LMZ14203 Transient Response VIN = 24V VOUT = 3.3V, 0.6 A to 3A Step AN-2024 LMZ1420x / LMZ1200x Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 7 PCB Layout Diagrams 5 www.ti.com PCB Layout Diagrams Gerber and CAD files can be download from the LMZ14203 product folder. Figure 2. Top Layer Figure 3. Internal Layer I (Ground) Heat Sinking Layer 8 AN-2024 LMZ1420x / LMZ1200x Evaluation Board SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated PCB Layout Diagrams www.ti.com Figure 4. Internal Layer II (Ground) Heat Sinking Layer Figure 5. Bottom Layer (Ground and Routing) Heat Sinking Layer SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback AN-2024 LMZ1420x / LMZ1200x Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 9 PCB Layout Diagrams www.ti.com Figure 6. LMZ14203 PCB CAD Package Schematic DNS = Component Not Installed 10 AN-2024 LMZ1420x / LMZ1200x Evaluation Board SNVA422E – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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