TI TPS22906YZVR

TPS22906
www.ti.com................................................................................................................................................................................................... SLVS921 – MARCH 2009
ULTRA-SMALL, LOW-INPUT VOLTAGE, LOW rON LOAD SWITCH
FEATURES
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
1
Low Input Voltage: 1.0 V to 3.6 V
Ultra-Low ON-State Resistance
– rON = 90 mΩ at VIN = 3.6 V
– rON = 100 mΩ at VIN = 2.5 V
– rON = 114 mΩ at VIN = 1.8 V
– rON = 172 mΩ at VIN = 1.2 V
500-mA Maximum Continuous Switch Current
Ultra Low Quiescent Current: 82 nA at 1.8 V
Ultra Low Shutdown Current: 44 nA at 1.8 V
Low Control Input Thresholds Enable Use of
1.2-V/1.8-V/2.5-V/3.3-V Logic
Controlled Slew Rate to Avoid Inrush Current:
220 µs tr
ESD Performance Tested Per JESD 22
– 2000-V Human-Body Model
(A114-B, Class II)
– 1000-V Charged-Device Model (C101)
Four-Terminal Wafer-Chip-Scale Package
(WCSP)
– 0.9 mm × 0.9 mm,
0.5-mm Pitch, 0.5-mm Height
•
•
•
•
•
•
•
Personal Digital Assistants (PDAs)
Cellular Phones
GPS Devices
MP3 Players
Digital Cameras
Peripheral Ports
Portable Instrumentation
RF Modules
DESCRIPTION
TPS22906 is an ultra-small, low ON-state resistance
(rON) load switch with controlled turn on. The device
contains a P-channel MOSFET that operates over an
input voltage range of 1.0 V to 3.6 V. The switch is
controlled by an on/off input (ON), which is capable of
interfacing directly with low-voltage control signals. A
120-Ω on-chip load resistor is added for output quick
discharge when the switch is turned off.
TPS22906 is available in a space-saving 4-terminal
WCSP with 0.5-mm pitch (YZV). The device is
characterized for operation over the free-air
temperature range of –40°C to 85°C.
YZV PACKAGE
TERMINAL ASSIGNMENTS
B
B
B
ON
GND
A
A
A
VIN
VOUT
2
1
2 1
Laser Marking View
(1)
1 2
Bump View
DEVICE
rON at 1.8 V
(TYP)
SLEW RATE
(TYP at 1.8 V)
QUICK
OUTPUT
DISCHARGE (1)
MAX OUTPUT
CURRENT
ENABLE
TPS22906
114 mΩ
220 µs
Yes
500 mA
Active high
This feature discharges the output of the switch to ground through a 120-Ω resistor, preventing the
output from floating.
ORDERING INFORMATION
TA
–40°C to 85°C
(1)
(2)
(3)
PACKAGE (1) (2)
WCSP – YZV (0.5-mm pitch)
ORDERABLE PART NUMBER
Tape and reel
TPS22906YZVR
TOP-SIDE MARKING
_ _ _ 5D_ (3)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
The actual top-side marking has three preceding characters to denote year, month, and sequence code, and one following character to
designate the wafer fab/assembly site. Pin 1 identifier indicates solder-bump composition (1 = SnPb, • = Pb-free).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated
TPS22906
SLVS921 – MARCH 2009................................................................................................................................................................................................... www.ti.com
TYPICAL APPLICATION
VBATT
VIN
SMPS
ON
(see Note A)
CIN = 1 µF
CL
LOAD
VOUT
TPS22906
CL
RL
OFF
GND
GND
GND
A.
Switched mode power supply
APPLICATION BLOCK DIAGRAM
VIN
A2
Turn-On Slew Rate
Controlled Driver
ON
Control
Logic
B2
ESD Protection
A1
VOUT
Output Discharge
B1
GND
Figure 1. Functional Block Diagram
FUNCTION TABLE
2
ON (Control Input)
VIN to VOUT
L
OFF
ON
H
ON
OFF
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VOUT to GND
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS22906
TPS22906
www.ti.com................................................................................................................................................................................................... SLVS921 – MARCH 2009
TERMINAL FUNCTIONS
TERMINAL
BALL NO.
NAME
A1
VOUT
A2
VIN
B1
GND
B2
ON
DESCRIPTION
Switch output
Switch input, bypass this input with a ceramic capacitor to ground
Ground
Switch control input, active high
ABSOLUTE MAXIMUM RATINGS (1)
MIN
VIN
Input voltage range
VOUT
Output voltage range
VON
Input voltage range
PD
Power dissipation at TA = 25°C
IMAX
Maximum continuous switch current
TA
Operating free-air temperature range
–40
Tstg
Storage temperature range
–65
Tlead
Maximum lead temperature (10-s soldering time)
ESD
(1)
Electrostatic discharge protection
–0.3
–0.3
MAX
UNIT
4
V
VIN + 0.3
V
4
V
0.48
W
500
mA
85
°C
150
°C
300
°C
Human-Body Model (HBM)
2000
Charged-Device Model (CDM)
1000
V
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL IMPEDANCE RATING
UNIT
θJA
(1)
Package thermal impedance (1)
YZV package
123
°C/W
MIN
MAX
UNIT
1
3.6
V
VIN
V
3.6
V
The package thermal impedance is calculated in accordance with JESD 51-7.
RECOMMENDED OPERATING CONDITIONS
VIN
Input voltage range
VOUT
Output voltage range
VIH
High-level input voltage, ON
VIL
Low-level input voltage, ON
CIN
Input capacitor
(1)
0.85
0.4
1 (1)
V
µF
See Application Information.
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TPS22906
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ELECTRICAL CHARACTERISTICS
VIN = 1.0 V to 3.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
IIN
Quiescent current
IIN(OFF)
IOUT = 0, VIN = VON
OFF-state supply current
IIN(LEAKAGE)
TA
MIN TYP (1)
MAX
VIN = 1.1 V
Full
37
120
VIN = 1.8 V
Full
82
235
VIN = 3.6 V
Full
204
880
VIN = 1.1 V
Full
22
210
VIN = 1.8 V
Full
44
260
VIN = 3.6 V
Full
137
700
VIN = 1.1 V
Full
22
140
VIN = 1.8 V
Full
45
230
Full
137
610
25°C
90
108
TEST CONDITIONS
OFF-state switch current
VON = GND, OUT = Open
VON = GND, VOUT = 0
VIN = 3.6 V
VIN = 3.6 V
VIN = 2.5 V
rON
ON-state resistance
IOUT = - 200 mA
VIN = 1.8 V
VIN = 1.2 V
VIN = 1.1 V
rPD
Output pulldown resistance
VIN = 3.3 V, VON = 0, IOUT = 30 mA
ION
ON input leakage current
VON = 1.1 V to 3.6 V or GND
(1)
Full
UNIT
nA
nA
nA
125
25°C
100
Full
120
140
25°C
114
Full
138
160
25°C
172
Full
mΩ
210
235
25°C
204
Full
330
330
25°C
88
Full
120
Ω
25
nA
Typical values are at the specified VIN and TA = 25°C.
SWITCHING CHARACTERISTICS
VIN = 1.1 V, TA = 25°C , RL_CHIP = 120 Ω (unless otherwise noted)
PARAMETER
tON
tOFF
tr
tf
4
Turn-ON time
Turn-OFF time
VOUT rise time
VOUT fall time
TEST CONDITIONS
RL = 500 Ω
RL = 500 Ω
RL = 500 Ω
RL = 500 Ω
MIN
TYP
CL = 0.1 µF
531
CL = 1 µF
596
CL = 3.3 µF
659
CL = 0.1 µF
11
CL = 1 µF
67
CL = 3.3 µF
225
CL = 0.1 µF
365
CL = 1 µF
367
CL = 3.3 µF
395
CL = 0.1 µF
21
CL = 1 µF
189
CL = 3.3 µF
565
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MAX
UNIT
µs
µs
µs
µs
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Product Folder Link(s): TPS22906
TPS22906
www.ti.com................................................................................................................................................................................................... SLVS921 – MARCH 2009
SWITCHING CHARACTERISTICS
VIN = 1.2 V, TA = 25°C , RL_CHIP = 120 Ω (unless otherwise noted)
PARAMETER
tON
tOFF
tr
Turn-ON time
Turn-OFF time
VOUT rise time
TEST CONDITIONS
RL = 500 Ω
RL = 500 Ω
RL = 500 Ω
MIN
471
CL = 1 µF
527
CL = 3.3 µF
587
CL = 0.1 µF
10
CL = 1 µF
61
CL = 3.3 µF
199
CL = 0.1 µF
324
CL = 1 µF
325
CL = 3.3 µF
350
CL = 0.1 µF
tf
VOUT fall time
RL = 500 Ω
TYP
CL = 0.1 µF
MAX
UNIT
µs
µs
µs
20
CL = 1 µF
175
CL = 3.3 µF
523
µs
SWITCHING CHARACTERISTICS
VIN = 1.8 V, TA = 25°C , RL_CHIP = 120 Ω (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
CL = 1 µF
335
CL = 3.3 µF
367
CL = 1 µF
VOUT fall time
RL = 500 Ω
MAX
167
CL = 0.1 µF
220
CL = 1 µF
220
CL = 3.3 µF
235
159
CL = 3.3 µF
481
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µs
µs
µs
15
CL = 1 µF
Copyright © 2009, Texas Instruments Incorporated
UNIT
8
49
CL = 3.3 µF
CL = 0.1 µF
tf
TYP
302
CL = 0.1 µF
tOFF
MIN
CL = 0.1 µF
µs
5
TPS22906
SLVS921 – MARCH 2009................................................................................................................................................................................................... www.ti.com
SWITCHING CHARACTERISTICS
VIN = 2.5 V, TA = 25°C , RL_CHIP = 120 Ω (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
MIN
223
CL = 1 µF
246
CL = 3.3 µF
268
CL = 0.1 µF
tOFF
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
VOUT fall time
RL = 500 Ω
MAX
UNIT
µs
7
CL = 1 µF
µs
47
CL = 3.3 µF
158
CL = 0.1 µF
175
CL = 1 µF
175
CL = 3.3 µF
187
CL = 0.1 µF
tf
TYP
CL = 0.1 µF
µs
18
CL = 1 µF
185
CL = 3.3 µF
471
µs
SWITCHING CHARACTERISTICS
VIN = 3 V, TA = 25°C , RL_CHIP = 120 Ω (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
CL = 1 µF
211
CL = 3.3 µF
231
CL = 1 µF
6
VOUT fall time
RL = 500 Ω
156
CL = 0.1 µF
159
CL = 1 µF
160
CL = 3.3 µF
170
UNIT
µs
µs
µs
17
CL = 1 µF
160
CL = 3.3 µF
473
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MAX
7
46
CL = 3.3 µF
CL = 0.1 µF
tf
TYP
191
CL = 0.1 µF
tOFF
MIN
CL = 0.1 µF
µs
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS22906
TPS22906
www.ti.com................................................................................................................................................................................................... SLVS921 – MARCH 2009
SWITCHING CHARACTERISTICS
VIN = 3.6 V, TA = 25°C , RL_CHIP = 120 Ω (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
CL = 1 µF
183
CL = 3.3 µF
201
CL = 1 µF
VOUT fall time
RL = 500 Ω
MAX
155
CL = 0.1 µF
146
CL = 1 µF
146
CL = 3.3 µF
156
161
CL = 3.3 µF
475
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µs
µs
µs
17
CL = 1 µF
Copyright © 2009, Texas Instruments Incorporated
UNIT
7
45
CL = 3.3 µF
CL = 0.1 µF
tf
TYP
166
CL = 0.1 µF
tOFF
MIN
CL = 0.1 µF
µs
7
TPS22906
SLVS921 – MARCH 2009................................................................................................................................................................................................... www.ti.com
W
TYPICAL CHARACTERISTICS
Input Voltage, VIN (V)
Figure 2. rON vs VIN
100
100
90
95
70
Voltage Drop (mV)
ON-State Resistance, rON (mΩ)
80
90
85
80
75
Vdrop = 1.0 V
60
Vdrop = 1.2 V
50
Vdrop = 1.8 V
Vdrop = 2.5 V
40
Vdrop = 3.3 V
30
70
20
65
10
60
0
–40
25
85
0.00
0.05
Temperature(°C)
Figure 3. rON vs Temperature (VIN = 3.3 V)
8
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0.10
0.15
0.20
0.25
0.30
Load Current (A)
0.35
0.40
0.45
0.50
Figure 4. Voltage Drop vs. Load Current
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TPS22906
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TYPICAL CHARACTERISTICS (continued)
200
250
180
200
Quiescent Current, IIN (nA)
Quiescent Current, IIN (nA)
160
140
150
120
100
100
80
60
50
40
20
0
0.5
0
1.0
1.5
2.0
2.5
3.0
Input Voltage, VIN(V)
3.5
–40
4.0
Figure 5. Quiescent Current vs VIN (VON = VIN, IOUT = 0)
25
Temperature(°C)
85
Figure 6. Quiescent Current vs Temperature (VIN = 3.3 V,
IOUT = 0)
120
250
225
200
100
IIN(OFF) Current (nA)
IIN(OFF) Current (nA)
175
80
60
150
125
100
75
40
50
20
0
0.5
25
0
1.0
1.5
2.0
2.5
Input Voltage, VIN(V)
3.0
3.5
Figure 7. IIN(OFF) vs VIN (VON = 0 V)
4.0
–40
25
Temperature(°C)
85
Figure 8. IIN(OFF) vs Temperature (VIN = 3.3 V)
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TYPICAL CHARACTERISTICS (continued)
250
120
225
200
IIN (Leakage) Current (nA)
IIN (Leakage) Current (nA)
100
80
60
40
175
150
125
100
75
50
20
25
0
0.5
0
1.0
1.5
2.0
2.5
3.0
3.5
–40
4.0
25
85
Temperature (°C)
Input Voltage, VIN (V)
Figure 9. IIN(Leakage) vs VIN (IOUT = 0)
Figure 10. IIN (Leakage) vs Temperature (VIN = 3.3 V)
4.0
VIN = 3.6 V
3.5
VIN = 3.3 V
3.0
VIN = 3 V
VIN = 2.5 V
VOUT (V)
2.5
2.0
VIN = 1.8 V
VIN = 1.5 V
1.5
VIN = 1.2 V
1.0
VIN = 1.1 V
0.5
0.0
–0.5
0.3
0.4
0.5
0.6
Input Voltage, VON (V)
0.7
0.8
Figure 11. ON-Input Threshold
10
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TYPICAL CHARACTERISTICS (continued)
170
160
150
140
130
trise
120
90
80
70
60
50
40
tfall
30
20
10
0
–50
–35
–20
–5
10
25
40
Temperature (°C)
55
70
85
100
tON
VIN = 3.3 V
CL = 0.1 µF
RL = 500 Ω
tOFF
–35
Figure 12. trise/tfall vs Temperature
–5
10
25
40
Temperature (°C)
55
70
85
0.35
3.5
CL = 0.1 µF
RL = 500 Ω
VIN = 3.3 V
1.1
1.0
VON
0.9
0.01
IOUT
0.05
0.5
0.4
0.3
0.2
0.1
0.00
0.0
–0.1
–0.2
Output Current (A)
0.7
Control Input Voltage (V)
0.8
0.6
100
Figure 13. tON/tOFF vs Temperature
1.2
Control Input Voltage (V)
–20
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
CL = 0.1 µF
RL = 11 Ω
VIN = 3.3 V
IOUT
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
trise/tfall (µs)
100
tON/tOFF (µs)
VIN = 3.3 V
CL = 0.1 µF
RL = 500 Ω
110
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
–50
VON
–0.3
–0.4
–500
–200
0.0
200
400
600
800
1000
1200
0.00
1500
–0.05
–0.5
–1000
–500
Time (µs)
Figure 14. tON Response
0.0
500
1000
Time (µs)
1500
2000
2500
3000
Figure 15. tON Response
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TYPICAL CHARACTERISTICS (continued)
1.0
VON
0.9
0.01
IOUT
0.6
0.05
0.5
0.4
0.3
0.2
Output Current (A)
0.7
Control Input Voltage (V)
0.8
0.1
0.00
0.0
–0.1
–0.2
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
CL = 3 µ F
RL = 11 Ω
VIN = 3.3 V
IOUT
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
CL = 3 µ F
RL = 500 Ω
VIN = 3.3 V
1.1
Control Input Voltage (V)
0.35
3.5
1.2
VON
–0.3
500
1000
Time (µs)
1500
2000
2500
–1000
3000
–500
0.0
Figure 16. tON Response
1.0
VON
0.9
0.01
0.6
0.05
0.5
0.4
0.3
IOUT
0.2
Output Current (A)
0.7
0.1
Control Input Voltage (V)
0.8
Control Input Voltage (V)
1500
2000
2500
0.00
0.0
–0.1
–0.2
–0.3
–0.00
–200
0.0
200
400
600
Time (µs)
800
1000
3000
0.35
3.5
CL = 0.1 µF
RL = 500 Ω
VIN = 1.2 V
1.1
1200
–0.5
–1000
1500
CL = 0.1 µF
RL = 11 Ω
VIN = 1.2 V
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
IOUT
VON
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
–0.05
–500
0.0
Figure 18. tON Response
500
1000
Time (µs)
1500
2000
2500
3000
Figure 19. tON Response
0.35
3.5
1.2
1.1
1.0
VON
0.9
CL = 3 µ F
RL = 500 Ω
VIN = 1.2 V
0.01
0.6
0.05
0.5
0.4
0.3
IOUT
0.2
Output Current (A)
0.7
0.1
0.00
0.0
–0.1
–0.2
Control Input Voltage (V)
0.8
Control Input Voltage (V)
1000
Time (µs)
Figure 17. tON Response
1.2
–0.4
–5000
500
Output Current (A)
0.0
–0.05
–0.5
–0.00
–500
CL = 3 µ F
RL = 11 Ω
VIN = 1.2 V
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
–0.4
–1000
IOUT
VON
–0.3
–0.4
–1000
–500
0.0
500
1000
Time (µs)
1500
2000
2500
–0.00
3000
–0.05
–0.5
–1000
–500
Figure 20. tON Response
12
0.0
500
1000
Time (µs)
1500
2000
2500
3000
Figure 21. tON Response
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www.ti.com................................................................................................................................................................................................... SLVS921 – MARCH 2009
TYPICAL CHARACTERISTICS (continued)
0.10
VON
0.01
0.06
IOUT
0.05
0.05
0.04
0.03
0.02
Control Input Voltage (V)
0.07
Output Current (A)
Control Input Voltage (V)
0.08
0.01
0.00
0.00
–0.01
–0.02
CL = 0.1 µF
RL = 11 Ω
VIN = 3.3 V
IOUT
3.2
3.0
2.8
2.6
2.4
2.2
2.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
CL = 0.1 µF
RL = 500 Ω
VIN = 3.3 V
0.11
0.09
0.35
3.5
0.12
VON
–0.03
–0.04
–5000
0.0
200
400
600
Time (µs)
800
1000
1200
–0.05
–0.5
–0.00
–200
–250
1500
–100
0.0
Figure 22. tOFF Response
500
600
750
0.35
VON
0.01
IOUT
0.05
0.5
0.4
0.3
0.2
Output Current (A)
0.7
Control Input Voltage (V)
0.8
0.1
0.00
0.0
–0.1
–0.2
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.1
0.8
0.6
0.4
0.2
0.0
–0.2
CL = 3 µ F
RL = 11 Ω
VIN = 3.3 V
IOUT
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
1.0
Control Input Voltage (V)
400
3.5
CL = 3 µ F
RL = 500 Ω
VIN = 3.3 V
1.1
0.6
200
300
Time (µs)
Figure 23. tOFF Response
1.2
0.9
100
VON
–0.3
–0.4
–5000
0.0
200
400
600
Time (µs)
800
1000
1200
–0.05
–0.5
–0.00
–200
–250
1500
–100
0.0
Figure 24. tOFF Response
500
600
750
VON
0.01
0.6
0.05
0.5
0.4
0.3
IOUT
Output Current (A)
0.7
0.1
0.00
0.0
–0.1
–0.2
Control Input Voltage (V)
0.8
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
0.35
CL = 0.1 µF
RL = 11 Ω
VIN = 1.2 V
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
1.0
Control Input Voltage (V)
400
3.5
CL = 0.1 µF
RL = 500 Ω
VIN = 1.2 V
1.1
0.2
200
300
Time (µs)
Figure 25. tOFF Response
1.2
0.9
100
IOUT
VON
–0.3
–0.4
–50
–0.00
–20
0.0
20
40
60
Time (µs)
80
100
120
150
–0.05
–0.5
–250
–100
Figure 26. tOFF Response
0.0
100
200
300
Time (µs)
400
500
600
750
Figure 27. tOFF Response
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SLVS921 – MARCH 2009................................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
VON
0.01
0.6
0.05
0.5
0.4
0.3
0.2
IOUT
0.1
0.00
0.0
–0.1
–0.2
Control Input Voltage (V)
0.7
Output Current (A)
Control Input Voltage (V)
0.8
CL = 3 µ F
RL = 11 Ω
VIN = 1.2 V
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
0.32
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
–0.02
Output Current (A)
CL = 3 µ F
RL = 500 Ω
VIN = 1.2 V
1.0
0.9
0.35
3.5
1.2
1.1
IOUT
VON
–0.3
–0.4
–1000
–0.00
–500
0.0
500
1000
Time (µs)
1500
2000
2500
3000
–0.05
–0.5
–250
–100
Figure 28. tOFF Response
14
0.0
100
200
300
Time (µs)
400
500
600
750
Figure 29. tOFF Response
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PARAMETER MEASUREMENT INFORMATION
VIN
ON
VOUT
(A)
RL
CL
+
–
TPS22906
OFF
CIN =1 µF
GND
GND
GND
TEST CIRCUIT
1.8 V
VON
VON
VON/2
VON/2
tr
0V
tON
tOFF
VOUT/2
VOUT/2
90%
VOUT
VOH
VOUT
tf
0V
10%
90%
10%
VOL
tON/tOFF WAVEFORMS
A.
trise and tfall of the control signal is 100 ns.
Figure 30. Test Circuit and tON/tOFF Waveforms
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APPLICATION INFORMATION
ON/OFF Control
The ON pin controls the state of the switch. Activating ON continuously holds the switch in the on state so long
as there is no fault. ON is active HI and has a low threshold making it capable of interfacing with low voltage
signals. The ON pin is compatible with standard GPIO logic threshold. It can be used with any microcontroller
with 1.2-V, 1.8-V, 2.5-V, or 3.3-V GPIOs.
Input Capacitor
To limit the voltage drop on the input supply caused by transient in-rush currents when the switch turns on into a
discharged load capacitor or short-circuit, a capacitor needs to be placed between VIN and GND. A 1-µF ceramic
capacitor, CIN, place close to the pins is usually sufficient. Higher values of CIN can be use to further reduce the
voltage drop during high current application. When switching heavy loads, it is recommended to have an input
capacitor approximately 10 times higher than the output capacitor to avoid excessive voltage drop.
Output Capacitor
Due to the integral body diode in the PMOS switch, a CIN greater than CL is highly recommended. A CL greater
than CIN can cause VOUT to exceed VIN when the system supply is removed. This could result in current flow
through the body diode from VOUT to VIN.
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.
16
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