Texas Instruments TPS22967EVM-023 Manual de usuario
User's Guide
SLVU951–August 2013
TPS22967EVM-023 Single 4A Load Switch
The TPS22967EVM-023 evaluation module contains a single channel, ultra low ON resistance, 4-A load
switch with controlled turn-on and adjustable rise time
Contents
1 Description ................................................................................................................... 2
1.1 Typical Applications ................................................................................................ 2
1.2 Features ............................................................................................................. 2
2 Electrical Performance Specifications .................................................................................... 3
3 Schematic .................................................................................................................... 4
4 List of Test Points ........................................................................................................... 4
5 Layout ........................................................................................................................ 5
5.1 Typical Test Setups ................................................................................................ 8
5.2 Test Setup Equipment List ........................................................................................ 9
5.3 Test Procedure (Standalone Setup) ........................................................................... 10
5.4 RON Test Procedure .............................................................................................. 10
5.5 Trise/Ton Tfall/Toff Test Procedure ............................................................................ 10
6 Performance Data and Typical Characteristic Curves ................................................................ 10
6.1 Trise/Tfall Curves ................................................................................................. 11
7 Bill of Materials ............................................................................................................. 13
List of Figures
1 TPS22967EVM-023 Schematic........................................................................................... 4
2 TPS22967EVM-023 Top Assembly....................................................................................... 5
3 TPS22967EVM-023 Topside.............................................................................................. 6
4 TPS22967EVM-023 Bottomside .......................................................................................... 7
5 TPS22967EVM-023 Recommended Ron Test Set Up ................................................................ 8
6 TPS22967EVM-023 Recommended Rise Time Test Set Up ......................................................... 9
7 TPS22967EVM-023 Trise/Ton VIN=5V VBIAS=5V ct=1nF Load =10Ω............................................ 11
8 TPS22967EVM-023 Tfall/Toff VIN=5V VBIAS=5V ct=1nF Load =10Ω............................................. 12
List of Tables
1 The Functions of Each Test Points....................................................................................... 4
2 EVM Components List.................................................................................................... 13
1
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Description
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1 Description
The TPS22967 is a small, ultra-low ON-resistance (RON) single channel load switch with controlled turn on.
The device contains a low Rds(ON) N-channel MOSFET that can operate over an input voltage range of 0.8
V to 5.5 V and can support a maximum continuous current of up to 4-A. The switch is controlled by an
active high on/off input (ON), which is capable of interfacing directly with low-voltage GPIO control signals.
In the TPS22967, a 225-Ωon-chip load resistor is added for quick output discharge (QOD). When the
switch is turned off, the output of the switch is discharged to ground through the 225-Ωload resistor. The
rise time of the device is internally controlled in order to avoid in-rush current and can be adjusted using
an external ceramic capacitor on the CT pin.
The TPS22967 is available in a small, space-saving 2mm x 2mm 8-pin SON package with integrated
thermal pad allowing for high power dissipation.
1.1 Typical Applications
• Ultrabooks™
• Notebooks/Netbooks
• Tablet PC
• Consumer Electronics
• Set-top Boxes/Residential Gateways
• Industrial Systems
• Telecom Systems
• Solid State Drivers (SSD)
1.2 Features
• Integrated single channel load switch
• Input voltage range: 0.8V to 5.5V
• Ultra-low on-resistance (22 mΩtypical)
• 4A maximum continuous switch current
• Low threshold control input
• Adjustable slew-rate control
• Quick Output Discharge transistor
• SON 8-pin package with thermal pad
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Electrical Performance Specifications
2 Electrical Performance Specifications
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the specification in the following table applies over the operating ambient
temperature –40°C ≤TA≤85°C (Full) and VBIAS = 5.0 V. Typical values are for TA= 25°C.
PARAMETER TEST CONDITIONS TAMIN TYP MAX UNIT
POWER SUPPLIES AND CURRENTS
IIN(VBIAS-ON) VBIAS quiescent current IOUT = 0, VIN = VON = VBIAS = 5.0 V Full 50 75 µA
IIN(VBIAS-OFF) VBIAS shutdown current VON = GND, VOUT = 0 V Full 2 µA
VIN = 5.0 V 0.2
VIN = 3.3 V 0.02
IIN(VIN-OFF) VIN off-state supply current VON = GND, VOUT = 0 V Full µA
VIN =1.8 V 0.01
VIN = 0.8 V 0.005
ION ON pin input leakage current VON = 5.5 V Full 0.5 µA
RESISTANCE CHARACTERISTICS
25°C 22 33
VIN = 5.0 V mΩ
Full 35
25°C 22 33
VIN = 3.3 V mΩ
Full 35
25°C 22 33
VIN = 1.8 V mΩ
Full 35
IOUT = –200 mA,
RON ON-state resistance VBIAS = 5.0 V 25°C 22 33
VIN = 1.5 V mΩ
Full 35
25°C 22 33
VIN = 1.2 V mΩ
Full 35
25°C 22 33
VIN = 0.8 V mΩ
Full 35
RPD Output pulldown resistance VIN = 5.0 V, VON = 0 V, IOUT = 15 mA Full 225 300 Ω
3
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Schematic
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Users may refer to Datasheet Document SLVSC42 for additional Electrical Specifications.
3 Schematic
Figure 1. TPS22967EVM-023 Schematic
4 List of Test Points
Table 1. The Functions of Each Test Points
Test Points Name Description
J1 VIN DC Input to VIN
J2 VOUT VOUT Connection
JP1 VBIAS Connects VBIAS to VIN
JP2 ON Connects ON to VIN or GND
JP3 C1 Connects C1 to VIN
JP4 C5 Connects C5 to VOUT
JP5 R1 Connects R1 to VOUT
JP6 R2 Connects R2 to VOUT
TP1 VIN VIN of TPS22967
TP2 ON ON of TPS22967
TP3 VIN SEN Sense connect to VIN of TPS22967
TP4 VBIAS VBIAS of TPS22967
TP5 VOUT SEN Sense connect to VOUT of TPS22967
TP6 VOUT VOUT of TPS22967
TP7 GND Ground Connection
TP8 GND Ground Connection
TP9 GND Ground Connection
TP10 GND Ground Connection
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Layout
5 Layout
Figure 2. TPS22967EVM-023 Top Assembly
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Layout
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Figure 3. TPS22967EVM-023 Topside
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Layout
Figure 4. TPS22967EVM-023 Bottomside
7
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Layout
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5.1 Typical Test Setups
Figure 5. TPS22967EVM-023 Recommended Ron Test Set Up
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Layout
Figure 6. TPS22967EVM-023 Recommended Rise Time Test Set Up
5.2 Test Setup Equipment List
•Voltage Source:
– 1 Power Source capable of 10V 10A.
•Multimeters:
– 2 voltmeters
•Output Loads:
– Electronic Load or Resistor(If testing 4A operation of the switch at 5.5V a 22W power rated resistor
is needed)
•Oscilloscope:
– 2 channel 100MHz
•Signal Generator:
– Dual Channel Preferred
•Recommended Wire Gauge: 18 AWG
9
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Performance Data and Typical Characteristic Curves
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5.3 Test Procedure (Standalone Setup)
Figure 5 shows a typical setup for RON testing of the EVM. VBIAS voltage must be present for the device
to function. Place a shunt across JP1 to connect VBIAS to VIN voltage source, if VIN supply is used below
2.5V remove the shunt and connect VBIAS voltage to a voltage source greater or equal to 2.5V.
5.4 RON Test Procedure
1. Setup the EVM per Figure 5.
2. Set SOURCE1 level to 5.0V.
3. Place a shunt on JP2 shorting pins 1 to 2. This connects ON to VIN voltage, ON voltage must be
between 1.2V and 5.5V for a valid ON state. (When testing RON it is desired to have the switch
operating in the always ON condition.)
4. Place a load on VOUT.
5. Turn on SOURCE1.
6. Record the voltage reading from Meter1, record the input current reading from Source1. Calculate RON
by dividing Meter1 voltage level by the current reading from Source1. The results will be the RON value
for the Switch.
7. Turn off Source1.
5.5 Trise/Ton Tfall/Toff Test Procedure
1. Set up the EVM per Figure 6.
2. Set SOURCE1 level to 5.0V VBIAS is operational between 2.5V and 5.25V, Datasheet limits are
specified with VBIAS set at 5.0V.
3. Remove shunt from JP2.
4. Place a load on VOUT1 (a 10Ω3.25W resistor is recommended for this test).
5. Set signal generator outputs to 0-2Vpp levels, 10–100Hz, and 25% duty cycle. Connect signal
generator output to TP2.
6. Turn on SOURCE1.
7. Turn ON the signal generator output.
8. Trise and Ton can be observed from the oscilloscope channel2. A detailed description of tR, tON, tF, and
tOFF are listed in the TPS22967 Datasheet under the Switching Characteristics Section.
9. Turn off Source1, and the signal generator output.
6 Performance Data and Typical Characteristic Curves
Figure 7 through Figure 8 present typical performance curves for TPS22967EVM-023.
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