TPS79501DRBEVM

User's Guide SBVU016A – June 2010 – Revised September 2016 TPS78601/TPS79501/TPS79601DRB Evaluation Module This user’s guide describes the characteristics, operation, and use of the TPS78601DRBEVM, TPS79501DRBEVM and TPS7960DRBEVM (or TPS7xx01DRBEVM). These EVMs demonstrate the operation and use of Texas Instruments’ TPS78601, TPS79501 and TPS79601 low dropout linear regulators (LDOs), all in 3.00 mm x 3.00 mm SON-8 packages, which are capable of 1.5 A, 500 mA, and 1 A of output current, respectively. This user’s guide includes setup instructions, a schematic diagram, thermal guidelines, a bill of materials (BOM), and printed circuit board (PCB) layout drawings for the evaluation module. Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the TPS7xx01DRBEVM, unless otherwise noted. 1 2 3 4 5 6 Contents Introduction ................................................................................................................... Setup .......................................................................................................................... Operation ..................................................................................................................... Thermal Guidelines .......................................................................................................... Board Layout ................................................................................................................. Schematic and Bill of Materials ............................................................................................ 1 2 2 3 4 6 List of Figures 1 ........................................................................................................ 1 Top Layer Assembly 2 Top Layer Routing ........................................................................................................... 5 4 3 Bottom Layer Routing ....................................................................................................... 5 4 TPS7xx01DRBEVM Schematic ............................................................................................ 6 Introduction The TPS7xx01DRBEVM helps designers evaluate the operation and performance of the LDOs Table 1 shows related devices. Table 1. Related Devices DEVICE PACKAGE SIZE ASSEMBLY DESCRIPTION TPS78601DRB 3.00 mm × 3.00 mm SON HPA497-001 Ultra-Low Noise, High-PSRR, Fast-RF, 1.5 A, Low-Dropout Linear Regulator TPS79501DRB 3.00 mm × 3.00 mm SON HPA497-002 TPS79601DRB 3.00 mm × 3.00 mm SON HPA497-003 Ultra-Low Noise, High-PSRR, Fast-RF, 1.0 A, Low-Dropout Linear Regulator Ultra-Low Noise, High-PSRR, Fast-RF, 500 mA, Low-Dropout Linear Regulator All trademarks are the property of their respective owners. SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback TPS78601/TPS79501/TPS79601DRB Evaluation Module Copyright © 2010–2016, Texas Instruments Incorporated 1 Setup 2 www.ti.com Setup !~ Section 2 describes the jumpers and connectors on the EVM and how to properly connect, set up, and use the TPS7xx01DRBEVM. 2.1 Input / Output Connector Descriptions J1: VIN This connector is the positive input supply voltage. The leads to the input supply should be twisted and kept as short as possible to minimize EMI transmission. Additional bulk capacitance should be added between J1 and J2 if the supply leads are greater than six inches. A capacitor with a value of 47 µF or greater improves the transient response of the TPS7xx01DRB device and helps to reduce ringing on the input when long supply wires are used. J2: GND This is the return connection for the output. J3: GND This is the return connection for the input power supply of the regulator. J4: VOUT This is the positive connection from the output. Connect this pin to the positive input of the load. J5: EN This jumper is used to enable or disable the output of the TPS7xx01DRB device. Placing a shorting jumper between pins 1 and 2 (ON position) enables the TPS7xx01DRB device. Placing the shorting jumper between pins 2 and 3 (OFF position) disables the TPS7xx01DRB device. J6: Output Voltage Select This jumper sets the desired output voltage from the TPS7xx01DRB device. Placing a shorting jumper between the appropriate pins gives the outputs shown in Table 2. Table 2. Output Voltage Settings 3 SHORT PINS: VOUT 1 and 2 3.3V 3 and 4 2.8V 5 and 6 2.5V 7 and 8 1.8V Operation Section 3 provides information about the operation of the TPS7xx01DRBEVM. 3.1 General Operation Connect the positive input power supply to J1. Connect the input power return (ground) to J3. The TPS7xx01DRB device has an absolute maximum input voltage of 6 V. TI recommends a maximum output voltage of 6 V. The highest input voltage may be less than 5.5 V because of thermal conditions. See the Thermal Considerations section of this manual to determine the highest input voltage. Connect the desired load between J4 (positive lead) and J2 (negative or return lead). Configure jumper J6 for the desired output voltage. 2 TPS78601/TPS79501/TPS79601DRB Evaluation Module SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback Copyright © 2010–2016, Texas Instruments Incorporated Thermal Guidelines www.ti.com 4 Thermal Guidelines Section 4 provides guidelines for the thermal management of the TPS7xx01DRBEVM board. 4.1 Thermal Considerations Thermal management is a key design component of any power converter and is especially important when the power dissipation in the LDO is high. To better help you design the TPS7xx01DRB family into your application, the following formula should be used to approximate the maximum power dissipation at a particular ambient temperature: TJ = TA + PD × θJA Where: TJ = junction temperature TA = ambient temperature PD = power dissipation in the IC θJA = thermal resistance from junction to ambient (1) All temperatures are in degrees Celsius (°C). The measured thermal resistance from junction to ambient for the TPS7xx01DRBEVM has a typical value of 32°C/W. The recommended maximum operating junction temperature specified in the product data sheets for the TPS7xx01 family is +125°C. With these two pieces of information, the maximum power dissipation can be found by using Equation 1. Table 3 shows the maximum input voltage that can be applied to the input of the TPS7xx01DRBEVM by device type and selected output voltage. The maximum input voltage shown provides the rated output current while keeping the junction temperature at or below the recommended +125°C. Values for two different ambient temperatures (+25°C and +85°C) are shown. Table 3. Maximum Input Voltage versus Ambient Temperature and Output Voltage (1) SELECTED OUTPUT VOLTAGE (V) FOR TA = +25°C SELECTED OUTPUT VOLTAGE (V) FOR TA = +85°C DEVICE IOUT (A) 1.80 2.50 2.80 3.30 1.80 2.50 2.80 TPS78601DRB 1.50 3.88 4.58 4.88 5.38 2.63 3.33 3.63 4.13 TPS79501DRB 0.50 5.5 (1) 5.5 (1) 5.5 (1) 5.5 (1) 4.30 5.00 5.30 5.5 (1) TPS79601DRB 1.00 4.93 5.5 (1) 5.5 (1) 5.5 (1) 3.05 3.75 4.05 4.55 3.30 Not limited by thermals; limited by recommended input voltage. SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback TPS78601/TPS79501/TPS79601DRB Evaluation Module Copyright © 2010–2016, Texas Instruments Incorporated 3 Board Layout 5 www.ti.com Board Layout !~ Section 5 provides the TPS7xx01DRBEVM board layout and illustrations. 5.1 Layout NOTE: Board layouts are not to scale. These figures are intended to show how the board is laid out, and are not intended to be used for manufacturing TPS7xx01DRBEVM PCBs. Figure 1 through Figure 3 show the PCB layouts. Figure 1. Top Layer Assembly 4 TPS78601/TPS79501/TPS79601DRB Evaluation Module SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback Copyright © 2010–2016, Texas Instruments Incorporated Board Layout www.ti.com Figure 2. Top Layer Routing Figure 3. Bottom Layer Routing SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback TPS78601/TPS79501/TPS79601DRB Evaluation Module Copyright © 2010–2016, Texas Instruments Incorporated 5 Schematic and Bill of Materials 6 www.ti.com Schematic and Bill of Materials This section provides the TPS7xx01DRBEVM schematic and bill of materials. 6.1 Schematic Figure 4 shows the TPS7xx01DRBEVM schematic. Figure 4. TPS7xx01DRBEVM Schematic 6 TPS78601/TPS79501/TPS79601DRB Evaluation Module SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback Copyright © 2010–2016, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com 6.2 Bill of Materials Table 4 lists the bill of materials for the TPS7xx01DRBEVM. Table 4. TPS7xx01DRBEVM Bill of Materials (1) (2) (3) (1) (2) (3) 001 002 003 REFDES VALUE SIZE PART NUMBER MFR 1 1 1 C1 10 µF Capacitor, Ceramic, Low Inductance, 6.3 V, X5R, 20% DESCRIPTION 0603 STD STD 1 1 1 C2 33 pF Capacitor, Ceramic, Low Inductance, 50 V, COG, 5% 0603 STD STD 1 1 1 C3 20 pF Capacitor, Ceramic, Low Inductance, 50 V, COG, 5% 0603 STD STD 1 1 1 C4 4.7 µF Capacitor, Ceramic, Low Inductance, 6.3 V, X5R, 20% 0603 STD STD 1 1 1 C5 15 pF Capacitor, Ceramic, Low Inductance, 50 V, COG, 5% 0603 STD STD 1 1 1 C7 18 pF Capacitor, Ceramic, Low Inductance, 50 V, COG, 5% 0603 STD STD PEC02SAAN Header, Male 2-pin, 100-mil spacing 0.100" PEC02SAAN Sullins 4 4 4 J1, J2, J3, J4 1 1 1 J5 PEC03SAAN Header, Male 3-pin, 100-mil spacing 0.100" PEC03SAAN Sullins 1 1 1 J6 PEC04DAAN Header, Male 2 × 4-pin, 100-mil spacing 0.100" PEC04DAAN Sullins 1 1 1 R1 30.1 kΩ Resistor, Chip, 1/16W, 1% 0603 STD STD 1 1 1 R2 14.0 kΩ Resistor, Chip, 1/16W, 1% 0603 STD STD 1 1 1 R3 31.6 kΩ Resistor, Chip, 1/16W, 1% 0603 STD STD 1 1 1 R5 51.1 kΩ Resistor, Chip, 1/16W, 1% 0603 STD STD 1 1 1 R7 39.2 kΩ Resistor, Chip, 1/16W, 1% 0603 STD STD 1 — — U1 TPS78601DRB IC, LDO Linear Regulator Ultralow-Noise High PSRR Fast RF SON-8 TPS78601DRB TI — 1 — U1 TPS79501DRB IC, LDO Linear Regulator Ultralow-Noise High PSRR Fast RF SON-8 TPS79501DRB TI — — 1 U1 TPS79601DRB IC, LDO Linear Regulator Ultralow-Noise High PSRR Fast RF SON-8 TPS79601DRB TI 1 1 1 — — PCB, 2.00 in × 2.00 in × 0.062 in — HPS497 Any 2 2 2 — — Shunt, 100-mil, Black — 929950-00 3M These assemblies are ESD sensitive. ESD precautions shall be observed. These assemblies must be clean and free from flux and all contaminants. Use of no-clean flux is not acceptable. These assemblies must comply with workmanship standards IPC-A-610 Class 2. SBVU016A – June 2010 – Revised September 2016 Submit Documentation Feedback TPS78601/TPS79501/TPS79601DRB Evaluation Module Copyright © 2010–2016, Texas Instruments Incorporated 7 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. 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TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. 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. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to 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 Warnings and Restrictions It is important to operate this EVM within the input voltage range of 2.7V to 5.5V and the output voltage range of 1.2V to 5.5V. 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. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than +85°C. The EVM is designed to operate properly with certain components above +85°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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