TPS63060EVM-619

User's Guide SLVU442 – January 2012 TPS63060EVM-619 This user’s guide describes the characteristics, operation, and use of the TPS63060EVM evaluation module (EVM). The EVM is designed to help the user easily evaluate and test the operation and functionality of the TPS63060. This user’s guide includes setup instructions for the hardware, a schematic diagram, test results of the EVM, a bill of materials, and printed-circuit board layout drawings for the evaluation module. 1 2 3 4 Contents Introduction .................................................................................................................. Setup and Results .......................................................................................................... Board Layout ................................................................................................................ Schematic and Bill of Materials ........................................................................................... 1 Start-Up With Enable, VIN = 2.5 V 1 2 7 9 List of Figures 2 3 4 5 6 7 8 9 10 ....................................................................................... Start-Up With Enable, VIN = 6 V .......................................................................................... Output Ripple VIN = 3 V ................................................................................................... Output Ripple VIN = 5 V ................................................................................................... Output Ripple VIN = 8 V ................................................................................................... Load Step 100 mA to 500 mA, VIN = 8 V ............................................................................... Assembly Layer ............................................................................................................. Top Layer Routing .......................................................................................................... Bottom Layer Routing ...................................................................................................... Schematic .................................................................................................................... 3 4 5 5 6 7 8 8 9 9 List of Tables 1 1 Performance Specification Summary..................................................................................... 2 2 TPS63060EVM-619 Bill of Materials .................................................................................... 10 Introduction The Texas Instruments TPS63060 is a highly efficient, single-inductor, internally compensated, buck-boost converter in a 10-pin, 3-mm × 3-mm SON package. Both fixed and adjustable output voltage units are available. 1.1 Background The TPS63060EVM-619 uses the TPS63060 adjustable-output voltage version of the integrated circuit (IC) and is set to a 5-V output. The fixed-output version(s) can be evaluated on this EVM with minor modification as stated in section titled, Fixed Output Operation. The EVM operates with an input voltage between 2.5 V and 12 V. 1.2 Performance Specification Table 1 provides a summary of the TPS63060EVM-619 performance specifications. All specifications are given for an ambient temperature of 25°C. SLVU442 – January 2012 Submit Documentation Feedback TPS63060EVM-619 Copyright © 2012, Texas Instruments Incorporated 1 Setup and Results www.ti.com Table 1. Performance Specification Summary Specification Test Conditions Min Input voltage 2.5 2.5 Max 12 5 8 Unit V Output voltage IOUT = 0 mA to 1000 mA Output current VIN = 10 V to 12 V 0 1000 mA VIN = 5 V to 10 V, VOUT = 5 V 0 2000 mA VIN = 2.5 V to 10 V, VOUT = 2.5 V 0 2000 Operating frequency 1.3 Typ 2400 Efficiency 5 V in at 1000-mA load Output ripple 5 V in at 500-mA load V mA kHz 93% 25 mV Modifications The printed-circuit board (PCB) 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 is open. Extra positions are available for additional input and output capacitors. 1.3.1 Adjustable-Output IC U1 Operation U1 is configured for evaluation of the adjustable-output version. This unit is set to 5 V. Resistors R1 and R2 can be used to set the output voltage between 2.5 V and 8 V. See the data sheet for recommended values. 1.3.2 Fixed-Output Operation U1 can be replaced with the fixed version for evaluation. With the fixed version, R1 needs to be replaced with a 0-Ω resistor; R2 position is open. 2 Setup and Results This section describes how to properly use the TPS63060EVM-619. 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 – Sense Vin Sense and GND Sense, low-current sense lines for sampling the input voltage at the input capacitor. 2.1.3 J3 – GND Vin GND return connection from the input supply for U1, common with J6. 2.1.4 J4 – VOUT Output voltage connection. 2.1.5 J5 – Sense Vout Sense and GND Sense low-current sense lines for sampling the output voltage at the output capacitor. 2.1.6 J6 – GND Vout GND return connection for the output voltage, common with J3. 2 TPS63060EVM-619 SLVU442 – January 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Setup and Results www.ti.com 2.1.7 J7 – PG GND Power Good (PG) test point and GND connection. 2.1.8 JP1 – ENABLE Shorting jumper between the center pin and ON turns on the unit. Installing a shorting jumper between the center pin and OFF turns the unit off. 2.1.9 JP2 –PWR Save Installing a shorting jumper between the center pin and OFF disables the power-saving mode; the jumper between the center pin and ON enables automatic transition to power-saving mode at light-load currents as described in the data sheet. The center pin can be used to synchronize the unit with an external clock; see the data sheet for additional details. 2.2 Setup To operate the EVM, connect an input supply with the positive lead to J1 and negative lead to J3; connect a load with the positive lead to J4 and the negative lead to J6; short EN to ON (pins 1 and 2) of JP1 with a shorting jumper. 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 to maximum value. Output voltage is monitored during this time and must increase for the switch current to increase. The following data was taken with a 13-Ω load under multiple VIN conditions. Figure 1. Start-Up With Enable, VIN = 2.5 V SLVU442 – January 2012 Submit Documentation Feedback TPS63060EVM-619 Copyright © 2012, Texas Instruments Incorporated 3 Setup and Results www.ti.com Figure 2. Start-Up With Enable, VIN = 6 V 2.4 Output Ripple Output ripple occurs at the switching frequency of 2.4 MHz, and with the recommended L and output C, is of low amplitude. The amplitude of the ripple varies, depending on load current and input voltage. Ensure that the oscilloscope probe is connected as close as possible to the output capacitor, with a short ground lead, for accurate measurements. Impedance in trace and probe lead add to output ripple, and ground loop length increases the amplitude of switching spikes. The following dataset was taken with a 250-mA load over multiple input voltages. 4 TPS63060EVM-619 SLVU442 – January 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Setup and Results www.ti.com Figure 3. Output Ripple VIN = 3 V Figure 4. Output Ripple VIN = 5 V SLVU442 – January 2012 Submit Documentation Feedback TPS63060EVM-619 Copyright © 2012, Texas Instruments Incorporated 5 Setup and Results www.ti.com Figure 5. Output Ripple VIN = 8 V 2.5 Power Dissipation With high efficiency, the power to be dissipated is low. Also, the QFN package with a thermal relief pad is very efficient at removing heat. Care must be taken, however, to not overheat the device. 2.6 Load Transients Load transient response is well regulated. Additional output capacitance reduces voltage overshoot and undershoot. 6 TPS63060EVM-619 SLVU442 – January 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Board Layout www.ti.com Figure 6. Load Step 100 mA to 500 mA, VIN = 8 V 3 Board Layout This section provides the TPS63060EVM-619 board layout and illustrations. 3.1 Layout Figure 7 through Figure 9 show the board layout for the TPS63060EVM-619 PCB. SLVU442 – January 2012 Submit Documentation Feedback TPS63060EVM-619 Copyright © 2012, Texas Instruments Incorporated 7 Board Layout www.ti.com Figure 7. Assembly Layer Figure 8. Top Layer Routing 8 TPS63060EVM-619 SLVU442 – January 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com Figure 9. Bottom Layer Routing 4 Schematic and Bill of Materials This section provides the TPS63060EVM-619 schematic and bill of materials. 4.1 Schematic Figure 10. Schematic SLVU442 – January 2012 Submit Documentation Feedback TPS63060EVM-619 Copyright © 2012, Texas Instruments Incorporated 9 Schematic and Bill of Materials 4.2 www.ti.com Bill of Materials Table 2. TPS63060EVM-619 Bill of Materials Count 4.3 RefDes Value Description Size Part Number MFR 1 C1 1uF Capacitor, Ceramic, 16V, X5R, 10% 402 GRM155R61C105KA12D Murata 1 C4 1uF Capacitor, Ceramic, 10V, X5R, 10% 402 Std Std 1 C8 0.1uF Capacitor, Ceramic, 25V, X7R, 10% 603 Std Std 0 C10 10pF Capacitor, Ceramic, 25V, X5R, 20% 603 Std Std 1 C11 10pF Capacitor, Ceramic, 6.3V, X5R, 20% 603 Std Std 5 C12, C13, C5, C6, C7 22uF Capacitor, Ceramic, 10V, X5R, 20% 805 Std Std 2 C2, C3 10uF Capacitor, Ceramic, 25V, X5R, 20% 603 GRM188R61E106MA73 Murata 1 C9 100uF Capacitor, Tantalum, SMT, 100uF, 25V, 10% X T491X107K025AT Kemet 1 L1 1uH Inductor, Power, 4.5 A, ±20% 0.157 x 0.157 inch XFL4020-102ML Coilcraft 5 R1, R3, R4, R5 1.00M Resistor, Chip, 1/16W, 1% 603 Std Std 5 R2 110k Resistor, Chip, 1/16W, 1% 603 Std Std 1 U1 TPS63060DSC IC, High Input Voltage Single Inductor BuckBoost Converter SON-1 TPS63060DSC TI Related Documentation From Texas Instruments TPS63060, High Input Voltage Buck-Boost Converter With 2A Switch Current data sheet (SLVSA92) 4.4 If You Need Assistance Contact your local TI sales representative. 10 TPS63060EVM-619 SLVU442 – January 2012 Submit Documentation Feedback Copyright © 2012, 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. 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