TPS54335EVM-556

User's Guide SLVU915 – June 2013 TPS54335EVM-556 3-A Regulator Evaluation Module This user's guide contains background information for the TPS54335 as well as support documentation for the TPS54335EVM-556 evaluation module (PWR556-001). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54335EVM-556. 1 2 3 4 Contents Introduction .................................................................................................................. 2 Test Setup and Results .................................................................................................... 4 Board Layout ............................................................................................................... 12 Schematic and Bill of Materials .......................................................................................... 14 List of Figures 1 TPS54335EVM-556 Efficiency ............................................................................................ 5 2 TPS54335EVM-556 Low Current Efficiency............................................................................. 5 3 TPS54335EVM-556 Load Regulation .................................................................................... 6 4 TPS54335EVM-556 Line Regulation ..................................................................................... 6 5 TPS54335EVM-556 Transient Response 6 TPS54335EVM-556 Loop Response 7 8 9 10 11 12 13 14 15 16 17 18 ............................................................................... 7 .................................................................................... 7 TPS54335EVM-556 Output Ripple, IOUT = 3 A .......................................................................... 8 TPS54335EVM-556 Output Ripple, IOUT = 100 mA ..................................................................... 8 TPS54335EVM-556 Output Ripple, IOUT = 0 A .......................................................................... 9 TPS54335EVM-556 Input Ripple ........................................................................................ 9 TPS54335EVM-556 Start-Up Relative to VIN .......................................................................... 10 TPS54335EVM-556 Start-up Relative to Enable ..................................................................... 10 TPS54335EVM-556 Shut-down Relative to VIN........................................................................ 11 TPS54335EVM-556 Shut-down Relative to EN ....................................................................... 11 TPS54335EVM-556 Top-Side Assembly ............................................................................... 12 TPS54335EVM-556 Top-Side Layout 3 ................................................................................ 13 TPS54335EVM-556 Bottom-Side Layout .............................................................................. 13 TPS54335EVM-556 Schematic.......................................................................................... 14 List of Tables 1 Input Voltage and Output Current Summary ............................................................................ 2 2 TPS54335EVM-556 Performance Specification Summary ............................................................ 2 3 Output Voltages Available ................................................................................................. 3 4 EVM Connectors and Test Points ........................................................................................ 4 5 TPS54335EVM-556 Bill of Materials .................................................................................... 15 SLVU915 – June 2013 Submit Documentation Feedback TPS54335EVM-556 3-A Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 1 Introduction 1 www.ti.com Introduction This user's guide contains background information for the TPS54335 as well as support documentation for the TPS54335EVM-556 evaluation module (PWR556-001). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54335EVM-556. 1.1 Background The TPS54335 dc/dc converter is designed to provide up to a 3-A output from an input voltage source of 4.5 V to 28 V. Rated input voltage and output current range for the evaluation module are given in Table 1. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54335 regulator. The switching frequency is externally set at a nominal 340 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54335 package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allow the TPS54335 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The compensation components are external to the integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54335 provides an adjustable undervoltage lockout input. The absolute maximum input voltage is 30 V for the TPS54335EVM-556. Table 1. Input Voltage and Output Current Summary 1.2 EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE TPS54335EVM-556 VIN = 8 V to 28 V 0 A to 3 A Performance Specification Summary A summary of the TPS54335EVM-556 performance specifications is provided in Table 2. Specifications are given for an input voltage of VIN = 24 V and an output voltage of 5.0 V, unless otherwise specified. The TPS54335EVM-556 is designed and tested for VIN = 8 V to 28 V. The ambient temperature is 25°C for all measurements, unless otherwise noted. Table 2. TPS54335EVM-556 Performance Specification Summary SPECIFICATION TEST CONDITIONS VIN operating voltage range MIN 8 MAX 24 28 UNIT V VIN start voltage 7.12 V VIN stop voltage 6.12 V 5 V Output voltage set point Output current range VIN = 8 V to 28 V Line regulation IO = 1.5 A, VIN = 8 V to 28 V ±0.05% Load regulation VIN = 24 V, IO = 0 A to 3 A ±0.15% IO = 0.75 A to 2.25 A Load transient response IO = 2.25 A to 0.75 A 0 3 A Voltage change –190 Recovery time 150 μs Voltage change 190 mV Recovery time mV 150 μs 31.6 kHz Loop bandwidth VIN = 24 V, IO = 1.5 A Phase margin VIN = 24 V , IO = 1.5 A 61 ° Input ripple voltage IO = 3 A 400 mVPP Output ripple voltage IO = 3 A