User's Guide
SLVU465A – June 2011 – Revised August 2013
TPS22920EVM-002/TPS22920L
This user's guide describes the characteristics, operation, and use of the TPS22920EVM-002 and the
TPS22920L evaluation modules (EVM). This EVM demonstrates the Texas Instruments TPS22920 load
switch with controlled turn on. The input voltage range of the TPS22920 is 0.75 V to 3.6 V. An integrated
charge pump biases the NMOS switch to achieve a minimum switch ON resistance. The switch is
controlled by an on/off input (EN), which is capable of interfacing directly with low-voltage control signals.
This user's guide includes setup instructions, schematic diagram, bill of materials, and printed-circuit board
layout drawings for the EVM.
1
Introduction
The TPS22920EVM-002 evaluation module (EVM) helps designers evaluate the operation and
performance of the TPS22920 load switch. The board features the small 6-pin CSP package for a small
solution size.
Table 1. TPS22920 VOUT Rise Time Options
DEVICE
Rise Time
(µS) Typ.
VIN(V)
Max.
Continuous
Current
Enable
(ON Pin)
Quick
Output
Discharge
HVL002-001
TPS22920
880
3.6
4-A
Active High
Yes
HVL002-002
TPS22920L
880
3.6
4-A
Active Low
Yes
EVM
1.1
Related Documentation From Texas Instruments
TPS22920 (SLVSAY8), ULTRA-LOW ON-RESISTANCE, 4-A INTEGRATED LOAD SWITCH WITH
CONTROLLED TURN-ON data sheet
TPS22920L (SLVSBT9), ULTRA-LOW ON-RESISTANCE, 4-A INTEGRATED LOAD SWITCH WITH
CONTROLLED TURN-ON data sheet
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS22920EVM-002.
2.1
J1/J3 – Input Connections
This is the connection for the leads from the input source. Connect the positive connection to the VIN J1
and the negative connection to the GND J3.
2.2
J4/J6 – Output Connections
This is the connection for the output of the TPS22920EVM. Connect the positive connection of the load to
the VOUT J4 and the negative connection to the GND J6.
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
TPS22920EVM-002/TPS22920L
1
Operation
2.3
www.ti.com
JP3 – EN
This is the enable input for the device. Place a shorting jumper across the pins of JP3 to enable or disable
the integrated circuit (IC). Refer to Table 1 for the correct Enabled state for the device type you are using.
A shorting jumper must be installed on JP3 in either the ON or OFF positions, and EN must not be left
unconnected. An external enable source can be applied to the TPS22920 by removing the shunt and
connecting a signal to the center pin of JP3. A switching signal may also be used and connected at this
point.
2.4
J2/J5 – VIN Sense and VOUT Sense
These two connectors are used when very accurate measurements of input or output voltage are required,
Ron measurements should be made using these sense connections and measuring the voltage drop from
VIN to VOUT and then calculating the resistance.
3
Operation
Connect the positive input of the power supply to the VIN J1 and the negative lead of the power supply to
GND J3. The input voltage range of the TPS22920 is 0.75 V to 3.6 V.
Output load can be applied by connecting between J4 VOUT and J6 GND. The TPS22920 is rated for a
maximum continuous current of 4A. Additional output load can be selected using JP6 and JP7. Shorting
across JP7 selects R2 an 18 ohm on board resistor. JP6 selects R1 which is open for customer selection.
R1 and R2 are intended for light loads of the output, observe the 1/2W(R1) and 3/4W(R2) power rating for
these parts. R2 was selected as 18 ohms to give a 200mA load at 3.6V VIN. Configure jumper JP3 as
required. JP3 must be installed for proper operation. ON is normal operation. While operating in the ON
state the rise time of the device is internally controlled to avoid inrush current. In the OFF position, the
device is shut down and a 1250-Ω on-chip load resistor is added for output quick discharge.
4
Test Results
See the Typical Characteristics section of the TPS22920 or TPS22920L data sheet.
5
Board Layout, Schematic, and Bill of Materials
This section provides the TPS22920EVM-002 board layout, schematic, and bill of materials.
5.1
Board Layout
For best performance, all traces should be as short as possible. To be most effective, the input and output
capacitors should be placed close to the device to minimize the effects that parasitic trace inductances
may have on normal and short-circuit operation. Using wide traces for VIN, VOUT, and GND helps minimize
the parasitic electrical effects along with minimizing the case to ambient thermal impedance Figure 1,
Figure 2, and Figure 3 show the board layout for the TPS22920EVM-002 PCB.
2
TPS22920EVM-002/TPS22920L
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
Board Layout, Schematic, and Bill of Materials
www.ti.com
Figure 1. Top Assembly Layer
Figure 2. Top Layer
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
TPS22920EVM-002/TPS22920L
3
Board Layout, Schematic, and Bill of Materials
www.ti.com
Figure 3. Bottom Layer
HI
1
Schematic and Bill of Materials
LO
2
3
GND
JP32
31
5.2
1
Not Installed
4A Max Output Current
GND
0.75v - 3.6v
1
C2
1uF
A2
VOUT
VIN
VOUT
VIN
GND
VOUT
A1
2
B1
2
VOUT
1
C1
D1 GND
1
2
VOUT
VIN
1 2
2
1 2
C1
1
1
1 2
J1
B2
ON
C3
0.1uF
1
C2
2
D2
2
1 2
1
2
2
1
1
VIN
U1
R1
R2
18
C4
J4
1
1
GND
2
2
2
GND
GND
GND
GND
GND
GND
1
2
+
1
J5
-
VOUT sense
GND
1
GND
JP7
12
2
12
JP6
1
GND
JP5
12
2
12
12
JP4
1
GND
J2
JP2
1
GND
GND
-
2
2
JP1
2
1
GND
2
12
VIN sense
1
GND
1
TPS22920YZP/TPS22920LYZP GND
2
1
+
1
2
1
1
2
2
GND
1
J6
J3
GND
GND
Figure 4. TPS22920EVM-002 Schematic
4
TPS22920EVM-002/TPS22920L
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
Board Layout, Schematic, and Bill of Materials
www.ti.com
Table 2. Bill of Materials
-001
Count
-002
Count
RefDes
Value
Description
Part Number
MFR
1
1
C3
0.1 µF
Capacitor, Ceramic,16-V, X7R
603
HVL002
Any
GRM188F51H1
04ZA01D
MuRat
a
1
1
C2
1 µF
Capacitor, Ceramic,6.3-V, X5R 10%
603
GRM188F51E1
05A12D
MuRat
a
0
0
C1, C4
OPEN
0
0
R1
OPEN
Capacitor, Ceramic
603
Std
Std
Resistor, 5% 1/8W
1210
Std
1
1
R2
Std
18 Ω
Resistor, 5% 1/2W
2010
ERJ12ZYJ180U
Std
12
12
J1 – J6,
JP1–2,
JP4–8
PEC02SAAN
Header, 2pin, 100mil spacing
0.100 inch x 2
PEC02SAAN
Sullins
1
1
1
JP3
PEC03SAAN
Header, 3pin, 100mil spacing IC,
0.100 inch x 3
PEC03SAAN
Sullins
0
U1
TPS22920YZP
Single Chip, Low Input Voltage Current-Limited Load
Switch with Shut Off Auto-Restart
YZP
TPS22920YZP
TI
0
1
U1
TPS22920LYZ
P
Single Chip, Low Input Voltage Current-Limited Load
Switch with Shut Off Auto-Restart
YZP
TPS22920LYZ
P
TI
3
3
N/A
N/A
Shunt, 100-mil, Black
0.100
929950-00
3M
–
Size
PCB, 0.9 In x 1.7 In x 0.062 In
5.3 VOUT Rise Time and TON Response
Figure 5. TPS22920 Trise Example
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
TPS22920EVM-002/TPS22920L
5
Board Layout, Schematic, and Bill of Materials
www.ti.com
Figure 6. TPS22920 Tfall Example
6
TPS22920EVM-002/TPS22920L
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
Revision History
www.ti.com
Revision History
Changes from Original (June 2011) to A Revision ......................................................................................................... Page
•
Updated document to include TPS22920L information.
.............................................................................
1
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
SLVU465A – June 2011 – Revised August 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
Revision History
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. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
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 0.75 V to 3.6 V and the output voltage range of unspecified.
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 50°C. The EVM is designed to operate
properly with certain components above 60°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.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2013, Texas Instruments Incorporated
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.
Products
Applications
Audio
www.ti.com/audio
Automotive and Transportation
www.ti.com/automotive
Amplifiers
amplifier.ti.com
Communications and Telecom
www.ti.com/communications
Data Converters
dataconverter.ti.com
Computers and Peripherals
www.ti.com/computers
DLP® Products
www.dlp.com
Consumer Electronics
www.ti.com/consumer-apps
DSP
dsp.ti.com
Energy and Lighting
www.ti.com/energy
Clocks and Timers
www.ti.com/clocks
Industrial
www.ti.com/industrial
Interface
interface.ti.com
Medical
www.ti.com/medical
Logic
logic.ti.com
Security
www.ti.com/security
Power Mgmt
power.ti.com
Space, Avionics and Defense
www.ti.com/space-avionics-defense
Microcontrollers
microcontroller.ti.com
Video and Imaging
www.ti.com/video
RFID
www.ti-rfid.com
OMAP Applications Processors
www.ti.com/omap
TI E2E Community
e2e.ti.com
Wireless Connectivity
www.ti.com/wirelessconnectivity
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2013, Texas Instruments Incorporated