User's Guide SLVU156 – March 2006 TPS63000EVM-148 This User’s Guide describes the characteristics, operation, and use of the TPS63000EVM evaluation module (EVM). This EVM is designed to help the user easily evaluate and test the operation and functionality of the TPS63000. This User’s Guide includes setup instructions for the hardware, a schematic diagram, a bill of materials (BOM), and PCB layout drawings for the evaluation module. 1 2 3 4 Contents Introduction .......................................................................................... Setup and Results .................................................................................. Board Layout ........................................................................................ Schematic and Bill of Materials ................................................................... 1 2 6 8 List of Figures 1 2 3 4 5 6 7 8 9 Turn ON into Electronic Load ..................................................................... Output Ripple Vin 3.0 V ............................................................................ Output Ripple Vin 4.0 V ............................................................................ Efficiency Over Li-Ion Cell Range ................................................................ Load Step 100 mA to 500 mA .................................................................... Assembly Layer ..................................................................................... Top Layer Routing .................................................................................. Bottom Layer Routing .............................................................................. TPS63000EVM-148 Schematic ................................................................... 3 4 4 5 5 6 7 7 8 List of Tables 1 2 1 Performance Specification Summary ............................................................ 2 TPS63000EVM-148 Bill of Materials ............................................................. 9 Introduction The Texas Instruments TPS63000 is a high efficient single inductor buck-boost converter in a 10-pin, 3-mm × 3-mm QFN package. Both fixed and adjustable output voltage units are available. 1.1 Background The TPS63000EVM-148 uses the TPS63000 adjustable version, and is set to 3.3-V output. The EVM operates with full-rated performance with an input voltage between 3.0 V and 5.5 V. 1.2 Performance Specification Table 1 provides a summary of the TPS63000EVM-148 performance specifications. All specifications are given for an ambient temperature of 25°C. SLVU156 – March 2006 Submit Documentation Feedback TPS63000EVM-148 1 www.ti.com Setup and Results Table 1. Performance Specification Summary Specification Test Conditions Min Typ Max Unit Input voltage Output voltage Iout = 500 mA 3.0 3.6 5.5 V Iout = 0 mA to 500 mA 3.2 3.3 3.4 Output current 3.6 V in 0 500 1000 Operating frequency 1.3 1000 Efficiency 3.6 V in at 500 mA load 90% Output ripple 3.6 V in at 500 mA load 25 V mA kHz mV Modifications The PWB for this EVM is designed to accommodate both the fixed and adjustable versions of this IC. If the fixed version is installed, R1 is replaced with a 0-Ω resistor and R2 will be open. 1.3.1 Adjustable Output IC U1 Operation U1 is configured for evaluation of the adjustable output version. This unit is configured for 3.3 V. Resistors R1 and R2 are used to set the output voltage between 1.2 V and 5.5 V. See data sheet for recommended values. 1.3.2 Fixed Output Operation U1 can be replaced with the fixed version for evaluation. R1 would need to be replaced with a 0-Ω resistor; R2 position would be open. 2 Setup and Results This chapter describes how to properly use the TPS63000EVM-148. 2.1 2.1.1 Input / Output Connector and Header Descriptions J1 – VIN Positive input connection from the input supply for U1. 2.1.2 J2 – GND Return connection from the input supply for U1, common with J4. 2.1.3 J3 – VOUT Output voltage connection. 2.1.4 J4 – GND Output return connection, common with J2. 2.1.5 JP1 – EN Enable pin; 1=enabled and 0=disabled. Shorting jumper JP1 between the center pin and VIN turns on the unit. Shorting the jumper between center pin and GND turns the unit off. 2 TPS63000EVM-148 SLVU156 – March 2006 Submit Documentation Feedback www.ti.com Setup and Results 2.1.6 JP2 –SYNC/PS Center pin is SYNC input, and is used to synchronize the unit with an external clock. Also, in power-saving mode, 1=disabled and 0=enabled. Shorting jumper JP2 between the center pin and VIN disables power-saving mode; jumper between center pin and GND enables power-saving mode. 2.2 Setup To operate the EVM, simply connect an input supply to the appropriate pins, connect a load to the appropriate pins. Maximum recommended load is 600 mA or 5.5 Ω. Input supply voltage of 3.0 V to 5.5 V is recommended. 2.3 Power Up The soft-start circuit is controlled by a ramp to the current limit comparator that starts the switch current limit low and increases it to 1.7 A. Output voltage is monitored during this time and must increase for switch current to increase. EN Pin VOUT 1V/div Figure 1. Turn ON into Electronic Load 2.4 Output Ripple Output ripple occurs at the switching frequency of 1 MHz, and with the recommended L and output C, is low. Amplitude of the ripple varies, depending on load current and input voltage. Ensure the oscilloscope probe is connected as close as possible to the output capacitor, with a very short ground lead, for accurate measurements. Resistance in trace and leads adds to output ripple, and ground lead length increases the amplitude of switching spikes. SLVU156 – March 2006 Submit Documentation Feedback TPS63000EVM-148 3 www.ti.com Setup and Results L1 Pin VOUT 10 mV/div L2 Pin Figure 2. Output Ripple Vin 3.0 V L1 Pin VOUT 10 mV/div L2 Pin Figure 3. Output Ripple Vin 4.0 V 4 TPS63000EVM-148 SLVU156 – March 2006 Submit Documentation Feedback www.ti.com Setup and Results 2.5 Efficiency Efficiency of over 90% is common at mid-to-high loads. With power-save mode enabled, efficiency is greater than 80% at light loads of 1 mA to 100 mA. 100 5 90 3.6 4.2 80 Efficiency - % 3 70 60 50 40 30 TPS63000, PS = Low, VO = 3.3 V 20 10 0 0.001 0.01 0.1 1 10 IO - Output Current - A Figure 4. Efficiency Over Li-Ion Cell Range 2.6 Power Dissipation With high efficiency, the power to be dissipated is low. Also, the QFN package with a solder pad is very efficient at removing heat. In this case, with unit delivering 3.3 V at 550 mA and 90% efficiency, power dissipation will be 180 mW. The package thermal resistance is about 50°C/W, therefore the case-to-junction temperature rise would be 9°C. This would allow an ambient temperatire of 116°C, and still hold the junction temperature below 125°C. 2.7 Load Transients Load transient response is well regulated. Additional output capacitance reduces voltage over- and under-shoot. LOAD I VOUT 100 mV/div Figure 5. Load Step 100 mA to 500 mA SLVU156 – March 2006 Submit Documentation Feedback TPS63000EVM-148 5 www.ti.com Board Layout 3 Board Layout This chapter provides the TPS63000EVM-148 board layout and illustrations. 3.1 Layout Figure 6 through Figure 8 show the board layout for the TPS63000EVM-148 PWB. Figure 6. Assembly Layer 6 TPS63000EVM-148 SLVU156 – March 2006 Submit Documentation Feedback www.ti.com Board Layout Figure 7. Top Layer Routing Figure 8. Bottom Layer Routing SLVU156 – March 2006 Submit Documentation Feedback TPS63000EVM-148 7 www.ti.com Schematic and Bill of Materials 4 Schematic and Bill of Materials This chapter provides the TPS63000EVM-148 schematic and bill of materials. 4.1 Schematic Figure 9. TPS63000EVM-148 Schematic 8 TPS63000EVM-148 SLVU156 – March 2006 Submit Documentation Feedback www.ti.com Schematic and Bill of Materials 4.2 Bill of Materials Table 2. TPS63000EVM-148 Bill of Materials 4.3 Count RefDes Description Size Part Number MFR 3 C1, C2, C3 10 µF Value Capacitor, ceramic, 6.3-V, X5R, 20% 0603 C1608X5R0J106M TDK 4 J1–J4 Header, 2-pin, 100-mil spacing, (36-pin strip) 0.100 × 2 PTC36SAAN Sullins 2 JP1, JP2 Header, 3-pin, 100-mil spacing, (36-pin strip) 0.100 × 3 PTC36SAAN Sullins 1 L1 Inductor, SMT, 1.5-A, 110-mΩ 0.118 × 0.118 LPS3015-222ML Coilcraft 3 R1, R3, R4 1.00M Resistor, chip, 1/16-W, 1% 0603 Std Std 1 R2 Resistor, chip, 1/16-W, 1% 0603 Std Std 1 U1 IC, High Efficiency, single-inductor buck-boost converter with 1.2-A switches QFN10 TPS63000DRC TI 1 — PCB, 1.3-In × 0.95-In × 0.062-In HPA148 Any 2 — Shunt, 100-mil, black 929950-00 3M 2.2 µH 178k 0.100 Related Documentation From Texas Instruments TPS63000 data sheet (SLVS520) 4.4 If You Need Assistance Contact your local TI sales representative. SLVU156 – March 2006 Submit Documentation Feedback TPS63000EVM-148 9 FCC Warnings This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical requirements of the directive. Should this evaluation kit not meet the specifications indicated in the EVM User's Guide, the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE Liable to the other FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the EVM User's Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact the TI application engineer. Persons handling the product must have electronics training and observe good laboratory practice standards. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2006, Texas Instruments Incorporated EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 3.0 V to 5.5 V. Maximum recommended output current is 1000 mA with 3.6 V input. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. During normal operation, some circuit components may have case temperatures greater than 50°C . The EVM is designed to operate properly with certain components above 50°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. 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