Texas Instruments TPS53014 User manual

User’s Guide
TPS53014 Buck Controller Evaluation Module User's
Guide
Table of Contents
1 Introduction.............................................................................................................................................................................2
2 Description.............................................................................................................................................................................. 2
2.1 Typical Applications............................................................................................................................................................2
2.2 Features............................................................................................................................................................................. 2
3 Electrical Performance Specifications................................................................................................................................. 3
4 Schematic................................................................................................................................................................................4
5 Test Setup................................................................................................................................................................................5
5.1 Test Equipment.................................................................................................................................................................. 5
5.2 Recommended Test Setup.................................................................................................................................................6
6 Configurations........................................................................................................................................................................ 6
6.1 Enable/Disable Switch S1.................................................................................................................................................. 6
7 Test Procedure........................................................................................................................................................................ 7
7.1 Line/Load Regulation and Efficiency Measurement Procedure......................................................................................... 7
7.2 List of Test Points............................................................................................................................................................... 7
7.3 Equipment Shutdown......................................................................................................................................................... 7
8 Performance Data and Typical Characteristic Curves........................................................................................................ 8
8.1 Efficiency............................................................................................................................................................................8
8.2 Load Regulation................................................................................................................................................................. 8
8.3 Line Regulation.................................................................................................................................................................. 9
8.4 Load Transient................................................................................................................................................................... 9
8.5 Output Ripple................................................................................................................................................................... 10
8.6 Switching Node.................................................................................................................................................................11
8.7 Enable Start-Up................................................................................................................................................................12
8.8 Disable............................................................................................................................................................................. 12
8.9 Thermal Image................................................................................................................................................................. 13
9 EVM Assembly Drawing and PCB Layout.......................................................................................................................... 14
10 List of Materials.................................................................................................................................................................. 17
11 Revision History..................................................................................................................................................................17
www.ti.com Table of Contents
SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
TPS53014 Buck Controller Evaluation Module User's Guide 1
Copyright © 2021 Texas Instruments Incorporated

1 Introduction
The TPS53014EVM-126 evaluation module (EVM) presents an easy-to-use reference design for a typical point-
of-load application in a standalone module using the TPS53014 controller in cost-sensitive applications.
2 Description
The TPS53014EVM-126 provides the user with a convenient way to evaluate the TPS53014 D-CAP2™ mode
control in a cost sensitive application. Providing a 1.05-V output at up to 8 A from a loosely regulated 12-V (8
V – 22 V) source, the TPS53014EVM-126 is designed to demonstrate the TPS53014 in a typical point-of-load
application while providing a number of test points to evaluate the performance of the TPS53014.
2.1 Typical Applications
• Point-of-load regulations in low-power systems for a wide range of applications
– Digital TV power supply
– Network home terminals
– Digital set top box (STB)
– DVD player/recorder
– Game consoles and others
2.2 Features
The TPS53014EVM-126 features:
• D-CAP2™ mode control
– Fast transient response
– No external parts required for loop compensation
– Compatible with ceramic output capacitors
• Auto-skip Eco-mode™ for high efficiency at light load
• 500-kHz switching frequency
• Adjustable soft start
• Non-sinking pre-biased soft start
• Cycle-by-cycle overcurrent limit
• Overcurrent, overvoltage, undervoltage, and overtemperature protections
• Convenient test points for probing critical waveforms
Introduction www.ti.com
2TPS53014 Buck Controller Evaluation Module User's Guide SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated

3 Electrical Performance Specifications
Table 3-1. TPS53014EVM-126 Electrical Performance Specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input Characteristics
Voltage range VIN 8.0 12 22 V
Maximum input current VIN = 12 V, IOUT = 8 A 0.9 A
No load input current VIN = 12 V, IOUT = 0 A 0.6 mA
Output Characteristics
Output voltage 1.05 V
Output voltage regulation Setpoint accuracy
(VIN = 12 V, IOUT = 8 A)
–2% 2%
Line regulation
(VIN = 8.0 V – 22 V, IOUT = 8 A)
1%
Load regulation
(VIN = 12 V, IOUT = 0 A – 8 A)
1.5%
Output voltage ripple VIN = 12 V, IOUT = 8 A 20 mVpp
Output load current 0 8.0 A
Overcurrent limit VIN = 12 V 11
Systems Characteristics
Switching frequency 500 kHz
Peak efficiency VIN = 12 V, IOUT = 3.2 A 86.5%
Full load efficiency VIN = 12 V, IOUT = 8.0 A 81.4%
Operating temperature 25 °C
www.ti.com Electrical Performance Specifications
SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
TPS53014 Buck Controller Evaluation Module User's Guide 3
Copyright © 2021 Texas Instruments Incorporated

4 Schematic
Notes:
NOT POPULATED
VIN
GND
8V - 22V
VOUT
GND
1.05V/8A
VIN
GND
VOUT
GND
EN SW
Enable
GND
Disable (Default)
Enable Circuitry
VREG5
1
1
11
1
SS
TP5
R5
5.11
C5
0.1uF
TP8 TP7
TP2
L1
1.5uH C7
22uF
TP6
1
2
J2
1
2
J1
C6
22uF
C8
R9
3.01
C12
1000pF
TP1
1VFB 2SS
3VREG5 4EN 5VIN 6
PGND
7
DRVL
8
SW
9
DRVH
10
VBST
U1
TPS53014DGS
C1
10uF
C2
10uF
C3
10uF
4
5
6
S1
SW_G12AP
TP9
G
S DQ1
CSD17507Q5A
G
S D
Q2
CSD17507Q5A
R2
10.0
C13
0.1uF
R6
1.00k
R8
1.00k C11
4.7uF C10
0.01uF
R4
R10
15.4k
TP4
R7
2.05
D1
BAT54XV2T1
R1
8.66k
R3
23.7k
TP3
TP10
R11
140
SH1
C9
C4
VIN
VOUT
PWRGND
PWRGND
AGND
VIN
VIN
VOUT
Figure 4-1. TPS53014EVM-126 Schematic
Schematic www.ti.com
4TPS53014 Buck Controller Evaluation Module User's Guide SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated

5 Test Setup
5.1 Test Equipment
Voltage Source:
•VIN: The input voltage source, VIN, should be a 0-V to 30-V variable DC source capable of supplying 2 ADC.
Connect VIN to J1 as shown in Figure 5-2.
Multimeters:
•V1: VIN at TP1 (VIN) and TP2 (GND), 0-V to 30-V voltmeter
•V2: VOUT at TP7 (VOUT) and TP8 (GND)
•A1: VIN input current, 0-ADC to 2-ADC Ammeter
Output Load: The output load should be an electronic constant resistance mode load capable of 0 ADC to 8 ADC
at 1.05 V.
Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope
should be set for the following:
• 1-MΩ impedance
• 20-MHz bandwidth
• AC coupling
• 1-µs/division horizontal resolution
• 50-mV/division vertical resolution
Test points TP7 and TP8 can be used to measure the output ripple voltage by placing the oscilloscope probe tip
through TP7 and holding the ground barrel on TP8 as shown in Figure 5-1. Using a leaded ground connection
may induce additional noise due to the large ground loop.
TP7 TP8
Figure 5-1. Tip and Barrel Measurement for VOUT Ripple
Fan: Some of the components in this EVM may approach temperatures of 85°C during operation. A small
fan capable of 200 LFM to 400 LFM is recommended to reduce component temperatures while the EVM is
operating. The EVM should not be probed while the fan is not running.
Recommended Wire Gauge:
•VIN to J1: The recommended wire size is 1x AWG #16 per input connection, with the total length of wire less
than four feet (2 feet input, 2 feet return).
•J2 to LOAD: The minimum recommended wire size is 1x AWG #16, with the total length of wire less than
four feet (2 feet output, 2 feet return)
www.ti.com Test Setup
SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
TPS53014 Buck Controller Evaluation Module User's Guide 5
Copyright © 2021 Texas Instruments Incorporated

5.2 Recommended Test Setup
Figure 5-2 is the recommended test setup to evaluate the TPS53014EVM-126. Working at an ESD workstation,
make sure that any wrist straps, bootstraps, or mats are connected referencing the user to earth ground before
power is applied to the EVM.
Figure 5-2. TPS53014EVM-126 Recommended Test Setup
Input Connections:
• Prior to connecting the DC input source VIN, it is advisable to limit the source current from VIN to 2-A
maximum. Make sure VIN is initially set to 0 V and connected to J2 as shown in Figure 5-2.
• Connect a current meter A1 between VIN and J1 to measure the input current.
• Connect a voltmeter V1 at TP1 (VIN) and TP2 (GND) to measure the input voltage.
Output Connections:
• Connect Load to J2 and set load to constant resistance mode to sink 0 ADC before VIN is applied.
• Connect a voltmeter V2 at TP7 (VOUT) and TP8 (GND) to measure the output voltage.
Other Connections: Place a fan as shown in Figure 5-2 and turn on, making sure air is flowing across the EVM.
6 Configurations
6.1 Enable/Disable Switch S1
The TPS53014EVM-126 is equipped with a switch (S1) to drive the EN pin of the TPS53014. When S1 is
in the Enable position, EN is connected to VIN, and the TPS53014 is enabled and generates a regulated
1.05-V output. When S1 is in the Disable position, EN is connected to GND, and the TPS53014 enters a high
impedance output state.
Default setting: Set S1 to the Disabled position to disable the controller
Test Setup www.ti.com
6TPS53014 Buck Controller Evaluation Module User's Guide SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated

7 Test Procedure
7.1 Line/Load Regulation and Efficiency Measurement Procedure
1. Set up the EVM as described in Section 5 and Figure 5-2.
2. Ensure Load is set to constant resistance mode and to sink 0 ADC.
3. Ensure the switch S1 is set per Section 6.
4. Increase VIN from 0 V to 12 V. Using V1 to measure VIN voltage.
5. Set the switch S1 to Enable position to enable the controller.
6. Use V2 to measure VOUT voltage, A1 to measure VIN current.
7. Vary load from 0 ADC to 8 ADC. VOUT should remain in load regulation.
8. Vary VIN from 8.0 V to 22 V. VOUT should remain in line regulation.
9. Set the switch S1 to Disable position to disable the controller.
10. Decrease load to 0 A.
11. Decrease VIN to 0 V.
7.2 List of Test Points
Table 7-1. Test Point Functions
TEST POINTS NAME DESCRIPTION
TP1 VIN Input voltage
TP2 GND GND
TP3 VREG5 Output of 5-V linear regulator
TP4 SS Soft-start ramp voltage
TP5 EN Enable pin
TP6 SW Switching node
TP7 VOUT Output voltage
TP8 GND GND
TP9 GND GND
TP10 GND GND
7.3 Equipment Shutdown
1. Shut down VIN.
2. Shut down Load.
3. Shut down FAN.
www.ti.com Test Procedure
SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
TPS53014 Buck Controller Evaluation Module User's Guide 7
Copyright © 2021 Texas Instruments Incorporated

8 Performance Data and Typical Characteristic Curves
Figure 8-1 through Figure 8-11 present typical performance curves for TPS53014EVM-126.
8.1 Efficiency
0
10
20
30
40
50
60
70
80
90
100
0.001 0.010 0.100 1.000 10.000
ILOAD - Load Current - A
Efficiency - %
VIN = 8 V
VIN = 12 V
VIN = 22 V
Figure 8-1. Efficiency
8.2 Load Regulation
1
1.02
1.04
1.06
1.08
1.1
0.001 0.010 0.100 1.000 10.000
ILOAD - Load Current - A
VOUT - Output Voltage - V
VIN = 8 V
VIN = 12 V
VIN = 22 V
Figure 8-2. Load Regulation
Performance Data and Typical Characteristic Curves www.ti.com
8TPS53014 Buck Controller Evaluation Module User's Guide SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated

8.3 Line Regulation
1
1.02
1.04
1.06
1.08
1.1
8 10 12 14 16 18 20 22
VIN - Input Voltage - V
VOUT - Output Voltage - V
IOUT = 8 A
Figure 8-3. Line Regulation
8.4 Load Transient
Figure 8-4. Output Load 0-A to 8-A Transient (12-V VIN, 1.05-V VOUT)
www.ti.com Performance Data and Typical Characteristic Curves
SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
TPS53014 Buck Controller Evaluation Module User's Guide 9
Copyright © 2021 Texas Instruments Incorporated

8.5 Output Ripple
Figure 8-5. Output Ripple at No Load (12-V VIN, 1.05-V VOUT, 0 A)
Figure 8-6. Output Ripple at Full Load (12-V VIN, 1.05-V VOUT, 8 A)
Performance Data and Typical Characteristic Curves www.ti.com
10 TPS53014 Buck Controller Evaluation Module User's Guide SLUU943A – MAY 2012 – REVISED DECEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated