Texas Instruments TPS563300EVM-226 User manual

User’s Guide
TPS563300EVM-226 3-A Regulator Evaluation Module
ABSTRACT
This user's guide contains information for the TPS563300 as well as support documentation for the TPS563300
evaluation module. Included are the performance specifications, board layout, schematic, and the list of
materials of the TPS563300EVM.
Table of Contents
1 Introduction.............................................................................................................................................................................2
2 Performance Specification Summary................................................................................................................................... 2
3 Modifications...........................................................................................................................................................................2
3.1 Output Voltage Setpoint..................................................................................................................................................... 3
4 Test Setup and Results.......................................................................................................................................................... 3
4.1 Input and Output Connections........................................................................................................................................... 3
4.2 Start-Up Procedure............................................................................................................................................................ 4
4.3 Load Transient Response.................................................................................................................................................. 4
4.4 Output Voltage Ripple........................................................................................................................................................ 6
4.5 Start-Up..............................................................................................................................................................................9
4.6 Shutdown........................................................................................................................................................................... 9
5 Board Layout.........................................................................................................................................................................10
5.1 Layout.............................................................................................................................................................................. 10
6 Schematic and List of Materials.......................................................................................................................................... 13
6.1 Schematic........................................................................................................................................................................ 13
6.2 List of Materials................................................................................................................................................................ 14
List of Figures
Figure 4-1. TPS563300EVM Connectors and Jumpers Placement............................................................................................ 3
Figure 4-2. TPS563300EVM Load Transient Response, 1-A – 3-A Load Step, 0.8 A/µs............................................................4
Figure 4-3. TPS563300EVM Load Transient Response, 0.5-A – 2.5-A Load Step, 0.8 A/µs......................................................5
Figure 4-4. TPS563300EVM Output Voltage Ripple, IOUT = 3 A................................................................................................. 6
Figure 4-5. TPS563300EVM Output Voltage Ripple, IOUT = 2 A................................................................................................. 6
Figure 4-6. TPS563300EVM Output Voltage Ripple, IOUT = 1 A................................................................................................. 7
Figure 4-7. TPS563300EVM Output Voltage Ripple, IOUT = 500 mA.......................................................................................... 7
Figure 4-8. TPS563300EVM Output Voltage Ripple, IOUT = 100 mA.......................................................................................... 8
Figure 4-9. TPS563300EVM Output Voltage Ripple, IOUT = 0 A................................................................................................. 8
Figure 4-10. TPS563300EVM Start-Up Relative to VIN .............................................................................................................. 9
Figure 4-11. TPS563300EVM Shutdown Relative to VIN ............................................................................................................9
Figure 5-1. TPS563300EVM Top Assembly.............................................................................................................................. 10
Figure 5-2. TPS563300EVM Top Layer..................................................................................................................................... 11
Figure 5-3. TPS563300EVM Bottom Layer................................................................................................................................11
Figure 5-4. TPS563300EVM Board Top View............................................................................................................................12
Figure 5-5. TPS563300EVM Board Bottom View......................................................................................................................12
Figure 6-1. TPS563300EVM Schematic Diagram..................................................................................................................... 13
List of Tables
Table 1-1. Input Voltage and Output Current Summary...............................................................................................................2
Table 2-1. Performance Specifications Summary........................................................................................................................2
Table 4-1. Connection and Test Points........................................................................................................................................ 4
Table 6-1. List of Materials.........................................................................................................................................................14
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Trademarks
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1 Introduction
The TPS563300 is a high efficiency, easy-to-use synchronous buck converter. With the wide input voltage range
of 3.8 V to 28 V, the device is ideally suited for systems powered from 5-V, 12-V, 19-V, 24-V power-bus rails.
The device supports up to 3-A continuous output current, 0.8-V to 22-V output voltage and maximum 98%
duty cycle operation. The device employs fixed-frequency peak current control mode for fast transient response
and good line and load regulation. The optimized internal loop compensation eliminates external compensation
components over a wide range of output voltage and operation frequency. Pulse frequency modulation (PFM)
mode maximizes the light load efficiency. The low quiescent current feature is beneficial for long battery life time
in low-power operation. The device also has a frequency spread spectrum feature, which helps with lowering
down EMI noise.
The TPS563300EVM evaluation module (EVM) is a single, synchronous buck converter providing 5 V at 3 A
from 5.1-V to 28-V input. This user’s guide describes the TPS563300EVM performance. Rated input voltage and
output current ranges for the evaluation module are given in Table 1-1.
Table 1-1. Input Voltage and Output Current Summary
EVM Input Voltage Range Output Current Range
TPS563300EVM VIN = 5.1 V to 28 V 0 A to 3 A
2 Performance Specification Summary
A summary of the TPS563300EVM performance specifications is provided in Table 2-1. Specifications are given
for an input voltage of VIN = 24 V and an output voltage of 5 V, unless otherwise noted. The ambient temperature
is 25°C for all measurement, unless otherwise noted.
Table 2-1. Performance Specifications Summary
SPECIFICATIONS TEST CONDITIONS MIN TYP MAX UNIT
Input voltage range 5.1 24 28 V
Output voltage set point 5 V
Operating frequency VIN = 24 V, IO = 3 A 500 kHz
Output current range 0 3 A
Over current limit VIN = 24 V, LO = 6.8 µH 5 A
Output ripple voltage VIN = 24 V, IO = 3 A 20 mVPP
3 Modifications
These evaluation modules are designed to provide access to the features of the TPS563300. Some
modifications can be made to this module.
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3.1 Output Voltage Setpoint
To change the output voltage of the EVMs, change the value of resistor R4. Changing the value of R4 can
change the output voltage. Use Equation 1 to calculate the value of R4 for a specific output voltage.
(1)
4 Test Setup and Results
This section describes how to properly connect, set up, and use the TPS563300EVM. The section also includes
test results typical for the evaluation modules and efficiency, output load regulation, output line regulation, load
transient response, output voltage ripple, input voltage ripple, start-up, and shutdown.
4.1 Input and Output Connections
The TPS563300EVM is provided with input and output connectors and test points as shown in Table 4-1. Figure
4-1 shows connectors and jumpers placement on TPS563300EVM board.
A power supply capable of supplying 3 A must be connected to J2 through a pair of 20-AWG wires. The load
must be connected to J1 through a pair of 20-AWG wires. The maximum load current capability is 3 A. Wire
lengths must be minimized to reduce losses in the wires. Test point TP3 provides a place to monitor the VIN input
voltages with TP7 providing a convenient ground reference. TP1 is used to monitor the output voltage with TP9
as the ground reference.
J1
J2
GND Vout
VIN
GND
Figure 4-1. TPS563300EVM Connectors and Jumpers Placement
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Table 4-1. Connection and Test Points
Reference Designator Function
J1 VOUT, 5 V at 3-A maximum
J2 VIN (see Table 1-1 for VIN range)
JP1 VIN divider
JP2 EN control. Shunt EN to GND to disable.
TP1 VOUT positive monitor point
TP2 VOUT positive power point
TP3 VIN positive monitor point
TP4 VIN positive power point
TP5, TP6 GND power point
TP7, TP9, TP12, TP13, TP14,TP15, TP16 GND monitor point
TP8 Switch node test point
TP10 Test point for loop response measurements
TP11 EN test point
4.2 Start-Up Procedure
1. Ensure that the jumper at JP2 (Enable control) pins 2 and 3 are covered to shunt EN to GND, disabling the
output.
2. Apply appropriate VIN voltage to VIN (J2-1) and GND (J2-2).
3. Move the jumper at JP2 (Enable control) pins 2 and 3 (EN and GND) to enable the output.
4.3 Load Transient Response
The TPS563300EVM response to load transient is shown in Figure 4-2 and Figure 4-3. The current steps and
slew rates are indicated in the figures with 20-MHz scope bandwidth. Total peak-to-peak voltage variation is as
shown.
VOUT = 200mV/div (AC coupled)
IOUT = 2A/div
100uS/div
Figure 4-2. TPS563300EVM Load Transient Response, 1-A – 3-A Load Step, 0.8 A/µs
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VOUT = 200mV/div (AC coupled)
IOUT = 2A/div
100uS/div
Figure 4-3. TPS563300EVM Load Transient Response, 0.5-A – 2.5-A Load Step, 0.8 A/µs
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4.4 Output Voltage Ripple
The TPS563300EVM output voltage ripple is shown in Figure 4-4, Figure 4-5, Figure 4-6, Figure 4-7, Figure 4-8
and Figure 4-9. The output currents are as indicated and all waveforms are with 20-MHz scope bandwidth.
VOUT = 20mV/div (AC coupled)
IL = 1A/div
2uS/div
Figure 4-4. TPS563300EVM Output Voltage Ripple, IOUT = 3 A
VOUT = 20mV/div (AC coupled)
IL = 1A/div
2uS/div
Figure 4-5. TPS563300EVM Output Voltage Ripple, IOUT = 2 A
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VOUT = 20mV/div (AC coupled)
IL = 500mA/div
2uS/div
Figure 4-6. TPS563300EVM Output Voltage Ripple, IOUT = 1 A
VOUT = 20mV/div (AC coupled)
IL = 500mA/div
2uS/div
Figure 4-7. TPS563300EVM Output Voltage Ripple, IOUT = 500 mA
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VOUT = 20mV/div (AC coupled)
IL = 500mA/div
4uS/div
Figure 4-8. TPS563300EVM Output Voltage Ripple, IOUT = 100 mA
VOUT = 20mV/div (AC coupled)
IL = 500mA/div
4mS/div
Figure 4-9. TPS563300EVM Output Voltage Ripple, IOUT = 0 A
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4.5 Start-Up
The TPS563300EVM start-up waveform with 20-MHz scope bandwidth relative to VIN is shown in Figure 4-10.
Load = 3 A.
Figure 4-10. TPS563300EVM Start-Up Relative to VIN
4.6 Shutdown
The TPS563300EVM shutdown waveform with 20-MHz scope bandwidth relative to VIN is shown in Figure 4-11.
Load = 3 A.
Figure 4-11. TPS563300EVM Shutdown Relative to VIN
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5 Board Layout
This section provides a description of the TPS563300EVM, board layout, and layer illustrations.
5.1 Layout
The board layout for the TPS563300EVM is shown in Figure 5-1, Figure 5-2, and Figure 5-3. The top layer
contains the main power traces for VIN, VOUT, and ground. Also on the top layer are connections for the pins
of the TPS563300 and a large area filled with ground. Most of the signal traces are also located on the top side.
The input decoupling capacitors, C6, C7, C8, and C9 are located as close to the IC as possible. The input and
output connectors, test points, and all of the components are located on the top side. The bottom layer is a
ground plane along with the switching node copper fill, signal ground copper fill and the feed back trace from the
point of regulation to the top of the resistor divider network. Both the top layer and bottom layer use 2 oz copper
thickness.
Figure 5-4 and Figure 5-5 are the TPS563300EVM board top view and bottom view, respectively.
Figure 5-1. TPS563300EVM Top Assembly
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