Texas Instruments TPS22810EVM User manual

1
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TPS22810 Load Switch Evaluation Module
User's Guide
SLVUAY7B–November 2016–Revised January 2018
TPS22810 Load Switch Evaluation Module
The TPS22810EVM evaluation module (EVM) allows the user to connect power to and control the 6-pin
TPS22810 load switch device. Parameters such as the on-resistance, rise time, and quick output
discharge can easily and accurately be evaluated. Table 1 lists a short description of the TPS22810 load
switch performance specifications.
Table 1. TPS22810 Rise Time, Output Current Rating, Enable, Undervoltage Lockout, and Output
Discharge Characteristics
EVM Device Rise Time Typical
(μs) VIN (V) Maximum Continuous Current (A) Enable (EN/UVLO) Quick Output Discharge
TPS22810EVM TPS22810DBV (CH1) Adjustable 2.7 to 18 2 Active High Adjustable
TPS22810EVM TPS22810DRV (CH2) Adjustable 2.7 to 18 3 Active High Adjustable
NOTE: The TPS22810-Q1 can also be evaluated on this EVM by replacing the TPS22810DBV (U1)
with the TPS22810TDBVRQ1.
Trademarks
All trademarks are the property of their respective owners.
1 Introduction
1.1 Description
The TPS22810EVM is a two-layer PCB containing the TPS22810 load switch device. The TPS22810EVM
supports two packages for TPS22810 device, SOT-23 package (DBV) on CH1 and SON package (DRV)
on CH2. The VIN and VOUT connections to the device and the PCB layout routing are capable of
handling high continuous currents and provide a low-resistance pathway into and out of the device under
test. Test point connections allow the EVM user to control the device with user-defined test conditions and
make accurate RON measurements.
1.2 Features
This EVM has the following features:
• VIN input voltage range: 2.7 to 18 V
• Access to the VIN, VOUT, CT, QOD, GND, and EN pins of the TPS22810 load switch device
• Onboard CIN, COUT, and CT capacitors
• 2-A maximum continuous current operation for TPS22810DBV
• 3-A maximum continuous current operation for TPS22810DRV
• Ability to adjust the QOD resistance using jumpers
• Ability to change COUT capacitor using jumpers

VIN
1
GND 2
EN/UVLO
3
CT
4
QOD 5
VOUT 6
U1
TPS22810DBV
GND
GNDGND
GND
TP2
VIN1_SENSE
TP6
EN1
TP3
VOUT1_SENSE
VIN1
2.7V to 18V
VOUT1
GND GND
VOUT1
QOD1
EN1
VIN1
CT1
249
R1
511
R2
TP5
CT1
GND GND
J3
GND
GND
TP8
GND
TP7
GND
TP1
VIN1
TP4
VOUT1
0.022µF
C4
1µF
C1
0.1µF
C2
GND
J4
10µF
C3
1
2
3
J1
562k
R4
DNP
100k
R5
DNP Green
D1
1
2
T2
VOUT1
GND2
TP10
VIN2_SENSE
TP14
EN2
TP11
VOUT2_SENSE
VIN2
2.7V to 18V
VOUT2
3A Max
VOUT2
QOD2
EN2
VIN2
CT2
TP13
CT2
J7 TP16
GND2
TP15
GND2
TP9
VIN2
TP12
VOUT2
0.022µF
C8
1µF
C5
0.1µF
C6
J8
10µF
C7
1
2
3
J5
562k
R9
DNP
100k
R10
DNP Green
D2
1
2
T3
VIN2
1
2
T4
VOUT2
VIN
6
GND 4
EN/UVLO
5
CT
3
QOD 2
VOUT 1
PAD 7
U2
TPS22810DRV
GND2
GND2 GND2
GND2
GND2
GND2 GND2
GND2
GND2GND2
1
2
T1
VIN1
47k
R3
47k
R8
1
2
3
4
5
6
J2
249
R6
511
R7
1
2
3
4
5
6
J6
2A Max
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Schematic www.ti.com
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TPS22810 Load Switch Evaluation Module
2 Schematic
Figure 1 illustrates the EVM schematic.
Figure 1. TPS22810EVM Schematic
3 General Configurations
3.1 Physical Access
Table 2 lists the TPS22810EVM input and output connector functionality, Table 3 describes the test point
availability, and Table 4 describes the jumper functionality.
Table 2. Input and Output Connector Functionality
Connector Label Description
T1 CH1 VIN1(+), GND(–) CH1 input power supply to the EVM
T2 VOUT1(+), GND(–) CH1 output from the EVM
T3 CH2 VIN2(+), GND2(–) CH2 input power supply to the EVM
T4 VOUT2(+), GND2(–) CH2 output from the EVM
Table 3. Test Points Description
Channel Test Points Label Description
CH1
TP1 VIN1 CH1 power supply input
TP2 VIN1_SENSE CH1 input voltage sense
TP3 VOUT1_SENSE CH1 output voltage sense
TP4 VOUT1 CH1 output voltage
TP5 CT1 CH1 slew rate control voltage
TP6 EN1 CH1 enable input
TP7, TP8 GND GND

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TPS22810 Load Switch Evaluation Module
Table 3. Test Points Description (continued)
Channel Test Points Label Description
CH2
TP9 VIN2 CH2 power supply input
TP10 VIN2_SENSE CH2 input voltage sense
TP11 VOUT2_SENSE CH2 output voltage sense
TP12 VOUT2 CH2 output voltage
TP13 CT CH2 slew rate control voltage
TP14 EN2 CH2 enable input
TP15, TP16 GND2 GND
Table 4. Jumper and LED Descriptions
Jumper Label Description
J1 UVLO CH1 UVLO selection
spac1-2 position disables the device
spac2-3 position sets default UVLO and enables the device
spacOpen position sets UVLO according to R4 and R5 ratio
J2 QOD
CH1 Quick Output Discharge (QOD) resistance selection
spac1-2 position sets 511-Ωexternal resistance in series with the QOD pin
spac3-4 position sets 249-Ωexternal resistance in series with the QOD pin
spac5-6 position sets default internal value
spacOpen position disables QOD function
J3 J3 CH1 10-µF capacitor connects to VOUT1, if installed
J4 J4 CH1 output power indicator LED pulled to VOUT1, if installed
J5 UVLO CH2 UVLO selection
spac1-2 position disables the device
spac2-3 position sets default UVLO and enables the device
spacOpen position sets UVLO according to R9 and R10 ratio
J6 QOD
CH2 Quick Output Discharge (QOD) resistance selection
spac1-2 position sets 511-Ωexternal resistance in series with the QOD pin
spac3-4 position sets 249-Ωexternal resistance in series with the QOD pin
spac5-6 position sets default internal value
spacOpen position disables QOD function
J7 J7 CH2 10-µF capacitor connects to VOUT2, if installed
J8 J8 CH2 output power indicator LED pulled to VOUT2, if installed
D1, D2 (GREEN-
LED) Output power indicator CH1, CH2 output power indicators, respectively. LED turns on whenever the output voltage is available.
3.2 Test Equipment
This section lists the following equipment required for test setup.
3.2.1 Power Supplies
One adjustable power supply: 0- to 20-V output, 0- to 3-A output current limit.
3.2.2 Meters
One DMM minimum needed and may require more if simultaneous measurements are required.
3.2.3 Oscilloscope
A DPO2024, or equivalent. Three 10× voltage probes and one DC current probe.

Load
12 Ÿ
DMM (mV)
+-
+
Source
12 V -
+
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NOTE: A resistive load is recommended for testing. If an electronic load is used, ensure that the
output load is set in the constant resistance (CR) mode, not in the constant current (CC)
mode.
3.3 Test Configurations
Make sure the evaluation board has default jumper settings as shown in Table 5.
Table 5. Default Jumper Setting for the TPS22810EVM
CH1 CH2
J1 J2 J3 J4 J5 J6 J7 J8
2-3 1-2 Install Install 2-3 1-2 Install Install
Connect the VIN power supply to the T1/T3 terminal (VIN1/VIN2). The input voltage range of the
TPS22810EVM is 2.7 to 18 V. External output loads can be applied to the load switch by using the T2/T4
terminal (VOUT1/VOUT2). The TPS22810 is active high device, and EN/UVLO pin must not be left
floating. A shorting jumper must be installed on J1 (CH1)/J5 (CH2) in the 2-3 position.
3.3.1 On-Resistance (RON) Test Setup
Figure 2 shows the typical setup for measuring on-resistance for CH1. The voltage drop across the switch
is measured using the sense connections (VIN1_SENSE, VOUT1_SENSE), and this can be divided by the
load current to calculate the RON resistance.
Figure 2. RON Measurement Test Setup

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3.3.2 Rise Time Test Setup
Use the following instructions to measure the rise time of the TPS22810 for CH1 (CH2):
1. Uninstall jumper J1 (J5).
2. Set the load resistance to 12 Ωat terminal T2 (T4) and input supply voltage to 12 V at terminal T1
(T3). Enable the power supply and the load.
3. Apply a square wave (10-Hz frequency with 50% duty cycle) to the EN/UVLO pin at TP6 (TP14) of the
load switch using a function generator.
4. Observe the waveform at VOUT1, TP4 (TP12) with an oscilloscope to measure the slew rate and rise
time of the load switch with a given input voltage of 12 V.
5. Change the default 22-nF CT capacitor C4 (C8) to vary the output voltage rise time.
Figure 3 shows an example of a rise time measurement taken on the TPS22810EVM.
Figure 3. TPS22810 VOUT Rise Profile (VIN = 12 V, CT = 22 nF, COUT = 10 µF, RL= 12 Ω)
3.3.3 Quick Output Discharge (QOD) Test Setup
Use the following instructions to measure the VOUT fall time of the TPS22810 for CH1 (CH2):
1. Uninstall jumper J2 (J6) to set QOD = OPEN
2. Set the load resistance to 1000 Ωat terminal T2 (T4) and input supply voltage to 12 V at terminal T1
(T3). Enable the power supply and the load.
3. Apply a square wave (5-Hz frequency with 50% duty cycle) to the EN/UVLO pin at TP6 (TP14) of the
load switch using a function generator.
4. Observe the waveform at VOUT1, TP4 (TP12) with an oscilloscope to measure the fall time of the load
switch.
5. Change the jumper J2 (J6) setting to 1-2 position, which sets 511-Ωexternal resistance in series with
the QOD pin. Observe the waveform at VOUT1, TP4 (TP12).
6. Change the jumper J2 (J6) setting to 5-6 position to set QOD = VOUT. Observe the waveform at
VOUT1, TP4 (TP12).

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Figure 4. TPS22810 VOUT Fall Profile With QOD = OPEN (VIN = 12 V, CT = 22 nF, COUT = 10 µF,
RL= 1000 Ω)
Figure 5. TPS22810 VOUT Fall Profile With External Discharge Resistor of 511 Ω(VIN = 12V, CT = 22 nF,
COUT = 10 µF, RL = 1000 Ω)

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TPS22810 Load Switch Evaluation Module
Figure 6. TPS22810 VOUT Fall Profile With QOD = VOUT (VIN = 12 V, CT = 22 nF, COUT = 10 µF, RL =
1000 Ω)

EVM Board Assembly Drawings and Layout Guidelines www.ti.com
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4 EVM Board Assembly Drawings and Layout Guidelines
4.1 PCB Drawings
Figure 7 shows component placement of the EVM and Figure 8 and Figure 9 show PCB layout images.
Figure 7. Top Side Placement Figure 8. Top Layer
Figure 9. Bottom Layer

www.ti.com Bill Of Materials (BOM)
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TPS22810 Load Switch Evaluation Module
5 Bill Of Materials (BOM)
Table 6 lists the EVM BOM.
Table 6. TPS22810EVM Bill of Materials
Designator QTY Value Description Package Reference Part Number Manufacturer
!PCB1 1 Printed Circuit Board HVL178 Any
C1, C5 2 1uF CAP, CERM, 1 µF, 25 V, +/- 10%, X7R, 0805 0805 GRM21BR71E105KA99L Murata
C2, C6 2 0.1uF CAP, CERM, 0.1 µF, 25 V, +/- 10%, X7R, 0805 0805 GRM21BR71E104KA01L Murata
C3, C7 2 10uF CAP, CERM, 10 µF, 25 V, +/- 10%, X7R, 1206 1206 GRM31CR71E106KA12L Murata
C4, C8 2 0.022uF CAP, CERM, 0.022 µF, 50 V, +/- 10%, X7R, 0603 0603 GRM188R71H223KA01D Murata
D1, D2 2 Green LED, Green, SMD LED_0603 150060GS75000 Wurth Elektronik
FID1, FID2, FID3 3 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A
H9, H10, H11, H12 4 Bumpon, Hemisphere, 0.44 X 0.20, Clear Transparent Bumpon SJ-5303 (CLEAR) 3M
J1, J5 2 Header, 100mil, 3x1, Gold, TH PBC03SAAN PBC03SAAN Sullins Connector Solutions
J2, J6 2 Header, 100mil, 3x2, Gold, TH Sullins 100mil, 2x3, 230 mil
above insulator PBC03DAAN Sullins Connector Solutions
J3, J4, J7, J8 4 Header, 100mil, 2x1, Gold, TH Sullins 100mil, 1x2, 230 mil
above insulator PBC02SAAN Sullins Connector Solutions
R1, R6 2 249 RES, 249, 1%, 0.1 W, 0603 0603 CRCW0603249RFKEA Vishay-Dale
R2, R7 2 511 RES, 511, 1%, 0.1 W, 0603 0603 CRCW0603511RFKEA Vishay-Dale
R3, R8 2 47k RES, 47 k, 5%, 0.1 W, 0603 0603 CRCW060347K0JNEA Vishay-Dale
SH-J1, SH-J2, SH-J3,
SH-J4, SH-J5, SH-J6,
SH-J7, SH-J8 8 1x2 Shunt, 100mil, Flash Gold, Black Closed Top 100mil Shunt SPC02SYAN Sullins Connector Solutions
T1, T2, T3, T4 4 Terminal Block, 2x1, 5.08mm, TH 10.16x15.2x9mm 282841-2 TE Connectivity
TP1, TP2, TP3, TP4,
TP5, TP6, TP7, TP8,
TP9, TP10, TP11,
TP12, TP13, TP14,
TP15, TP16
16 Test Point, Miniature, SMT Test Point, Miniature, SMT 5019 Keystone
U1 1 18-V, 79-mohm¸ On-Resistance Load Switch, DBV0006A DBV0006A TPS22810DBV Texas Instruments
U2 1 18-V, 79-mohm¸ On-Resistance Load Switch, DRV0006A DRV0006A TPS22810DRV Texas Instruments
R4, R9 0 562k RES, 562 k, 1%, 0.1 W, 0603 0603 RC0603FR-07562KL Yageo America
R5, R10 0 100k RES, 100 k, 1%, 0.1 W, 0603 0603 RC0603FR-07100KL Yageo America

Revision History www.ti.com
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Revision History
Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from A Revision (April 2017) to B Revision .................................................................................................... Page
• Added note regarding TPS22810-Q1 evaluation after Table 1...................................................................... 1
Changes from Original (November 2016) to A Revision ................................................................................................ Page
• Added TPS22810DRV to specifications in Table 1................................................................................... 1
• Split out the continuous current bullets for the two devices in the Features section. ............................................ 1
• Changed VOUT2 from 2A to 3A on the TPS22810DRV schematic. ............................................................... 2
• Changed output current limit from 0 to 2 A, to 0 to 3 A. ............................................................................. 3
• Deleted EVM rating sentence stating 2-A maximum continuous current in the Test Configurations section. ................ 4
• Deleted 2 A from the U1 and U2 Description column in the BOM.................................................................. 9