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TPS22921, TPS22922, TPS22922B
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
TPS2292x 3.6-V, 2-A, 14-mΩ ON-Resistance Load Switch With Controlled Turnon
1 Features
2 Applications
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Integrated P-Channel Load Switch
Input Voltage: 0.9 V to 3.6 V
ON-Resistance (Typical Values)
– rON = 14 mΩ at VIN = 3.6 V
– rON = 20 mΩ at VIN = 2.5 V
– rON = 33 mΩ at VIN = 1.8 V
– rON = 67 mΩ at VIN = 1.2 V
– rON = 116 mΩ at VIN = 1.0 V
2-A Maximum Continuous Switch Current
Quiescent Current:
– Typical 78 nA at 1.8 V
Shutdown Current:
– Typical 35 nA at 1.8 V
Low Threshold Control Input Enable the use of
1.2 V, 1.8 V, 2.5 V, or 3.3 V Logic
Controlled Slew Rate to Avoid Inrush Currents
– tR = 30 μs at VIN = 1.8 V (TPS22921/2)
– tR = 200 μs at VIN = 1.8 V (TPS22922B)
Quick Output Discharge (TPS22922/2B)
ESD Performance Tested Per JESD 22
– 3000-V Human Body Model
(A114-B, Class II)
– 1000-V Charged-Device Model (C101)
Six Terminal Wafer-Chip-Scale DSBGA Package
(nominal dimensions shown - see Mechanical,
Packaging, and Orderable Information for details)
– 0.9-mm × 1.4-mm, 0.5-mm Pitch,
0.5 mm Height (YZP)
– 0.9-mm × 1.4-mm, 0.5-mm Pitch,
0.625 mm Height (YZT)
– 0.8-mm × 1.2-mm, 0.4-mm Pitch,
0.5-mm Height (YFP)
PDAs
Cell Phones
GPS Devices
MP3 Players
Peripheral Ports
Portable Media Players
RF Modules
3 Description
TPS22921, TPS22922, and TPS22922B are small,
low rON load switches with controlled turnon. The
TPS22921/2/2B contains a P-channel MOSFET that
can operate over an input voltage range of 0.9 V to
3.6 V. The switch is controlled by an on/off input
(ON), which can interface directly with low-voltage
control signals. In TPS22922 and in TPS22922B, a
65-Ω on-chip load resistor is added for output quick
discharge when the switch is turned off. The rise time
(slew rate) of the device is internally controlled in
order to avoid inrush current: TPS22921 and
TPS22922 feature a 30-μs rise time, whereas
TPS22922B is 200 μs.
TPS22921, TPS22922, and TPS22922B feature low
quiescent and shutdown currents and are available in
space-saving 6-pin wafer-chip-scale packages
DSBGA (WCSP: YZP and YZT with 0.5-mm pitch and
YFP with 0.4-mm pitch) which make them ideal for
portable electronics. The devices are characterized
for operation over the free-air temperature range of
–40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
YZT
TPS22921(1)
0.9 mm × 1.4 mm
YZP
TPS22922
TPS22922B
BODY SIZE (NOM)
YFP
0.8 mm × 1.2 mm
YZP
0.9 mm × 1.4 mm
YFP
0.8 mm × 1.2 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Typical Application
VBATT
VIN
SMPS
ON
(see Note A)
CIN = 1 µF
CL
VOUT
LOAD
TPS22921/22/22B
CL
RL
OFF
GND
GND
A.
GND
Switched-mode power supply
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.
TPS22921, TPS22922, TPS22922B
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
www.ti.com
Table of Contents
1
2
3
4
5
6
7
8
Features ..................................................................
Applications ...........................................................
Description .............................................................
Typical Application ................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
1
2
3
3
4
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
8.13
4
4
4
4
5
6
6
7
7
8
8
9
9
Absolute Maximum Ratings .....................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Switching Characteristics: VIN = 0.9 V ......................
Switching Characteristics: VIN = 1 V .........................
Switching Characteristics: VIN = 1.1 V ......................
Switching Characteristics: VIN = 1.2 V ......................
Switching Characteristics: VIN = 1.8 V ....................
Switching Characteristics: VIN = 2.5 V ....................
Switching Characteristics: VIN = 3 V .......................
Switching Characteristics: VIN = 3.6 V ....................
8.14 Typical Characteristics .......................................... 10
9 Parameter Measurement Information ................ 19
10 Detailed Description ........................................... 20
10.1
10.2
10.3
10.4
Overview ...............................................................
Functional Block Diagram .....................................
Feature Description...............................................
Device Functional Modes......................................
20
20
20
20
11 Application and Implementation........................ 21
11.1 Application Information.......................................... 21
11.2 Typical Application ............................................... 21
12 Power Supply Recommendations ..................... 24
13 Layout................................................................... 24
13.1 Layout Guidelines ................................................. 24
13.2 Layout Example .................................................... 24
14 Device and Documentation Support ................. 25
14.1
14.2
14.3
14.4
Related Links ........................................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
25
25
25
25
15 Mechanical, Packaging, and Orderable
Information ........................................................... 25
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (May 2012) to Revision C
•
Page
Added Pin Configuration and Functions section, ESD Rating table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
Changes from Revision A (December 2008) to Revision B
Page
•
Changed Feature From: Ultra-Low Quiescent Current: 78 nA at 1.8 V To: Ultra-Low Quiescent Current: Typical 78
nA at 1.8 V.............................................................................................................................................................................. 1
•
Changed Feature From: Typical 78 nA at 1.8 V To: Ultra-Low Shutdown Current: Typical 35 nA at 1.8 V .......................... 1
•
Changed Feature From: Six Terminal Wafer-Chip-Scale Package To: Six Terminal Wafer-Chip-Scale Package
(nominal dimensions shown - see addendum for details ....................................................................................................... 1
•
Changed Feature From: 0.5-mm Height To: 0.5-mm Height (YFP) ....................................................................................... 1
•
Changed TPS22921 QUICK OUTPUT DISCHARGE From: - To: No.................................................................................... 3
•
Changed the format of the ELECTRICAL CHARACTERISTICS Test Conditions From: VIN = 1-V to VIN = 1 V.................... 5
•
Deleted Note 1 - RL_CHIP = 120 Ω from all SWITCHING CHARACTERISTICS tables....................................................... 6
•
Changed Figure 50 title From: tOFF Response To: tON Response ........................................................................................ 17
Changes from Original (November 2008) to Revision A
•
2
Page
Added Note A to the TYPICAL APPLICATION circuit............................................................................................................ 1
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Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
TPS22921, TPS22922, TPS22922B
www.ti.com
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
6 Device Comparison Table
RON AT 1.8 V
(TYP)
RISE TIME
(TYP at 1.8 V)
TPS22921
33 mΩ
TPS22922
33 mΩ
TPS22922B
33 mΩ
(1)
QUICK OUTPUT
DISCHARGE (1)
MAX OUTPUT
CURRENT
ENABLE
30 μs
No
2A
Active high
30 μs
Yes
2A
Active high
200 μs
Yes
2A
Active high
This feature discharges the output of the switch to ground through a 120-Ω resistor, preventing the
output from floating.
7 Pin Configuration and Functions
YFP, YZP, AND YZT PACKAGES
C
C
B
B
A
A
2 1
Laser Marking View
1 2
Bump View
Pin Assignments
C
ON
GND
B
VIN
VOUT
A
VIN
VOUT
2
1
Pin Functions
PIN
I/O
DESCRIPTION
NO.
NAME
A1
VOUT
O
Switch output
A2
VIN
I
Switch input. Use a bypass capacitor to ground (ceramic)
B1
VOUT
O
Switch output
B2
VIN
I
Switch input. Use a bypass capacitor to ground (ceramic)
C1
GND
–
Ground
C2
ON
I
Switch control input, active high. Do not leave floating
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
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TPS22921, TPS22922, TPS22922B
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
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8 Specifications
8.1 Absolute Maximum Ratings (1)
VIN
Input voltage
VOUT
Output voltage
VON
Input voltage
P
Power dissipation at TA = 25°C
IMAX
Maximum continuous switch current
TA
Operating free-air temperature
Tlead
Maximum lead temperature (10-s soldering time)
Tstg
Storage temperature
(1)
MIN
MAX
UNIT
–0.3
4
V
VIN + 0.3
V
4
V
0.645
W
–0.3
2
A
85
°C
300
°C
150
°C
–40
–65
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.
8.2 ESD Ratings
VALUE
Electrostatic
discharge
V(ESD)
(1)
(2)
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1)
±3000
Charged-device model (CDM), per JEDEC specification JESD22-C101 (2)
±1000
Machine model (MM)
±300
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
8.3 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)
MIN
MAX
0.9
3.6
V
VIN
V
3.6
V
0.85
0.4
1 (1)
UNIT
V
µF
Refer to Application Information.
8.4 Thermal Information
THERMAL METRIC
(1)
TPS22921, TPS22922,
TPS22922B
YFP
YZP
TPS22921
YZT
UNIT
6 PINS
RθJA
Junction-to-ambient thermal resistance
125.1
131
RθJC(top)
Junction-to-case (top) thermal resistance
1.4
1.3
2.1
RθJB
Junction-to-board thermal resistance
26
22.6
26.4
ψJT
Junction-to-top characterization parameter
0.3
5.2
3.7
ψJB
Junction-to-board characterization parameter
26
22.6
26.4
(1)
4
120.7
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
Submit Documentation Feedback
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
TPS22921, TPS22922, TPS22922B
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
8.5 Electrical Characteristics
VIN = 0.9 V to 3.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
IQ
TEST CONDITIONS
Quiescent current
IIN(OFF)
IIN(LEAKAGE)
IOUT = 0 mA
VON = GND,
OUT = Open
OFF-state supply current
VON = GND,
VOUT = 0 V
OFF-state switch current
Full
30
120
VIN = 1.8 V
Full
78
235
VIN = 3.6 V
Full
200
880
VIN = 1 V
Full
10
210
VIN = 1.8 V
Full
35
260
VIN = 3.6 V
Full
120
700
VIN = 1 V
Full
12
140
VIN = 1.8 V
Full
50
230
VIN = 3.6 V
Full
130
610
25°C
14
45
VIN = 2.5 V
VIN = 1.8 V
ON-state resistance
IOUT = –200 mA
VIN = 1.2 V
VIN = 1.1 V
VIN = 1 V
rPD
Output pulldown resistance
VIN = 3.3 V, VON = 0 V, IOUT = 30 mA
(TPS22922 and TPS22922B only)
ION
ON input leakage current
VON = 1.1 V to 3.6 V or GND
(1)
MIN TYP (1) MAX
VIN = 1 V
VIN = 3.6 V
rON
TA
Full
25°C
65
67
100
75
82
Full
150
160
116
Full
25°C
mΩ
120
Full
25°C
nA
60
Full
25°C
nA
55
33
Full
25°C
nA
50
20
Full
25°C
UNIT
160
170
65
120
Ω
25
nA
Typical values are at the specified VIN and TA = 25°C.
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
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8.6 Switching Characteristics: VIN = 0.9 V
VIN = 0.9 V, TA = 25°C (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
TPS22921
MIN
TYP
tr
tf
Turn-OFF time
VOUT rise time
VOUT fall time
RL = 500 Ω
RL = 500 Ω
RL = 500 Ω
MAX
MIN
TYP MAX
TPS22922B
MIN
TYP
CL = 0.1 μF
121
121
638
CL = 1 μF
160
160
712
CL = 3 μF
188
188
799
CL = 0.1 μF
tOFF
TPS22922
46
40
40
CL = 1 μF
308
279
279
CL = 3 μF
975
807
807
CL = 0.1 μF
60
60
462
CL = 1 μF
85
85
465
CL = 3 μF
107
107
507
CL = 0.1 μF
119
51
51
CL = 1 μF
969
434
434
CL = 3 μF
3174
1264
1264
MAX
UNIT
μs
μs
μs
μs
8.7 Switching Characteristics: VIN = 1 V
VIN = 1 V, TA = 25°C (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
6
VOUT fall time
RL = 500 Ω
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TPS22922
MIN
TYP MAX
TPS22922B
MIN
TYP MAX
105
105
549
CL = 1 μF
136
136
613
CL = 3 μF
157
157
683
46
28
28
CL = 1 μF
309
186
186
CL = 3 μF
983
511
511
CL = 0.1 μF
51
51
386
CL = 1 μF
78
78
388
CL = 3 μF
88
88
419
121
34
34
CL = 1 μF
986
306
306
CL = 3 μF
3300
908
908
CL = 0.1 μF
tf
TYP MAX
CL = 0.1 μF
CL = 0.1 μF
tOFF
TPS22921
MIN
UNIT
μs
μs
μs
μs
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
TPS22921, TPS22922, TPS22922B
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
8.8 Switching Characteristics: VIN = 1.1 V
VIN = 1.1 V, TA = 25°C (unless otherwise noted)
PARAMETER
TPS22921
TEST CONDITIONS
MIN
CL = 0.1 μF
tON
Turn-ON time
RL = 500 Ω
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
VOUT fall time
RL = 500 Ω
TYP MAX
MIN
TYP MAX
91
93
484
118
118
540
CL = 3 μF
137
137
599
44
21
21
CL = 1 μF
311
144
144
CL = 3 μF
99
383
383
CL = 0.1 μF
46
46
335
CL = 1 μF
60
60
336
CL = 3 μF
76
76
363
CL = 0.1 μF
tf
MIN
TPS22922B
CL = 1 μF
CL = 0.1 μF
tOFF
TYP MAX
TPS22922
122
29
29
CL = 1 μF
1000
224
224
CL = 3 μF
3300
732
732
UNIT
μs
μs
μs
μs
8.9 Switching Characteristics: VIN = 1.2 V
VIN = 1.2 V, TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
CL = 0.1 μF
tON
Turn-ON time
RL = 500 Ω
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
VOUT fall time
RL = 500 Ω
TPS22922
MIN
TPS22922B
TYP MAX
MIN
TYP MAX
83
83
435
103
103
485
CL = 3 μF
122
122
536
44
17
17
CL = 1 μF
312
117
117
CL = 3 μF
1000
319
319
CL = 0.1 μF
41
41
301
CL = 1 μF
54
54
302
CL = 3 μF
67
67
325
123
25
25
CL = 1 μF
1000
214
214
CL = 3 μF
3400
632
632
CL = 0.1 μF
tf
TYP MAX
CL = 1 μF
CL = 0.1 μF
tOFF
TPS22921
MIN
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Product Folder Links: TPS22921 TPS22922 TPS22922B
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UNIT
μs
μs
μs
μs
7
TPS22921, TPS22922, TPS22922B
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
www.ti.com
8.10 Switching Characteristics: VIN = 1.8 V
VIN = 1.8 V, TA = 25°C (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
TPS22921
MIN
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
VOUT fall time
RL = 500 Ω
TYP MAX
MIN
TYP MAX
54
54
282
CL = 1 μF
67
67
314
CL = 3 μF
78
78
344
10
41
10
CL = 1 μF
312
67
67
CL = 3 μF
1000
181
181
CL = 0.1 μF
30
30
200
CL = 1 μF
37
37
202
CL = 3 μF
47
47
219
CL = 0.1 μF
tf
MIN
TPS22922B
CL = 0.1 μF
CL = 0.1 μF
tOFF
TYP MAX
TPS22922
121
17
17
CL = 1 μF
1000
158
158
CL = 3 μF
3450
461
461
UNIT
μs
μs
μs
μs
8.11 Switching Characteristics: VIN = 2.5 V
VIN = 2.5 V, TA = 25°C (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
8
VOUT fall time
RL = 500 Ω
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TPS22922
MIN
TYP MAX
TPS22922B
MIN
TYP MAX
40
40
211
CL = 1 μF
50
50
233
CL = 3 μF
59
59
256
10
41
10
CL = 1 μF
316
56
56
CL = 3 μF
1000
153
153
CL = 0.1 μF
23
23
164
CL = 1 μF
29
29
165
CL = 3 μF
38
38
177
122
16
16
CL = 1 μF
1086
147
147
CL = 3 μF
3600
430
430
CL = 0.1 μF
tf
TYP MAX
CL = 0.1 μF
CL = 0.1 μF
tOFF
TPS22921
MIN
UNIT
μs
μs
μs
μs
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
8.12 Switching Characteristics: VIN = 3 V
VIN = 3 V, TA = 25°C (unless otherwise noted)
PARAMETER
tON
Turn-ON time
TEST CONDITIONS
RL = 500 Ω
TPS22921
MIN
tr
Turn-OFF time
VOUT rise time
RL = 500 Ω
RL = 500 Ω
VOUT fall time
RL = 500 Ω
TYP MAX
MIN
TYP MAX
30
30
182
CL = 1 μF
38
38
201
CL = 3 μF
45
45
221
10
40
10
CL = 1 μF
353
51
51
CL = 3 μF
1036
139
139
CL = 0.1 μF
20
20
149
CL = 1 μF
25
25
150
CL = 3 μF
33
33
161
CL = 0.1 μF
tf
MIN
TPS22922B
CL = 0.1 μF
CL = 0.1 μF
tOFF
TYP MAX
TPS22922
104
15
15
CL = 1 μF
1030
143
143
CL = 3 μF
3230
419
419
UNIT
μs
μs
μs
μs
8.13 Switching Characteristics: VIN = 3.6 V
VIN = 3.6 V, TA = 25°C (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
VOUT fall time
RL = 500 Ω
TPS22922
MIN
TPS22922B
TYP MAX
MIN
TYP MAX
30
30
159
CL = 1 μF
38
38
175
CL = 3 μF
45
45
193
10
42
10
CL = 1 μF
310
51
51
CL = 3 μF
988
139
139
CL = 0.1 μF
20
20
137
CL = 1 μF
25
25
138
CL = 3 μF
33
33
148
120
15
15
CL = 1 μF
1100
143
143
CL = 3 μF
3600
419
419
CL = 0.1 μF
tf
TYP MAX
CL = 0.1 μF
CL = 0.1 μF
tOFF
TPS22921
MIN
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Product Folder Links: TPS22921 TPS22922 TPS22922B
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UNIT
μs
μs
μs
μs
9
TPS22921, TPS22922, TPS22922B
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8.14 Typical Characteristics
8.14.1 Typical DC Characteristics
0.024
0.45
0.40
0.023
ON-State Resistance, rON (W)
ON-State Resistance, rON (Ω)
0.35
0.30
0.25
0.20
0.15
0.022
0.021
0.02
0.10
0.019
0.05
0.00
0.7
1.2
1.7
2.2
Input Voltage, VIN (V)
0.018
3.7
3.2
2.7
Figure 1. rON vs VIN
85.00
25.00
Temperature (C)
Figure 2. rON vs Temperature (VIN = 3.3 V)
225
500
450
200
400
175
300
Quiescent Current, IIN (nA)
350
V oltag e D rop (m V )
-40.00
Vdrop = 1.0 V
250
Vdrop = 1.2 V
200
Vdrop = 1.8 V
150
150
125
100.
75
Vdrop = 2.5 V
100
50
Vdrop = 3.3 V
50
25
0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0
0.5
2.0
1.0
1.5
Load Current (A)
Figure 3. Voltage Drop vs Load Current
2.0
2.5
Input Voltage, VIN (V)
3.0
3.5
4.0
Figure 4. Quiescent Current vs VIN (VON = VIN)
300
275
250
225
250
Leakage Current, IIN (nA)
Quiescent Current, IIN (nA)
200
200
150
100
175
150
125
100
75
50
25
50
0
0
–40
25
85
–40
Temperature (°C)
Figure 5. Quiescent Current vs Temperature
(VIN = 3.3 V, IOUT = 0 mA)
10
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25
Temperature (°C)
85
Figure 6. IIN Leakage Current vs Temperature (VIN = 3.3 V)
Copyright © 2008–2015, Texas Instruments Incorporated
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
140
160
120
140
120
100
IIN OFF Current (nA)
Leakage Current, IIN (nA)
Typical DC Characteristics (continued)
100
80
60
80
60
40
40
20
20
0
0.5
0
1.0
1.5
2.0
2.5
Input Voltage, VIN (V)
3.0
3.5
4.0
0.5
Figure 7. Leakage Current vs VIN
1.5
2.0
2.5
Input Voltage, VIN (V)
3.0
3.5
4.0
Figure 8. IIN (OFF) vs VIN (VON = 0 V)
275
4.0
250
3.5
225
3.0
200
2.5
175
VOUT (V)
Quiescent Current (OFF), IIN (nA)
1.0
150
125
2.0
—VIN = 3.6 V
—VIN = 3.3 V
—VIN = 3 V
—VIN = 2.5 V
—VIN = 1.8 V
—VIN = 1.5 V
—VIN = 1.2 V
—VIN = 1.1 V
—VIN = 1 V
—VIN = 0.9 V
1.5
100
1.0
75
0.5
50
0.0
25
0
–40
25
Temperature (°C)
–0.5
0.3
85
0.4
0.5
0.6
Input Voltage, VON (V)
0.7
0.8
Figure 10. ON-Input Threshold
Figure 9. IIN (OFF) vs Temperature (VIN = 3.3 V)
8.14.2 Typical AC Characteristics (TPS22921)
130
50.0
120
47.5
110
45.0
90
TOFF
80
40.0
tr /tf (µs)
tON/tOFF (µs)
tfall
100
42.5
37.5
70
60
35.0
50
32.5
40
30
30.0
tON
20
27.5
25.0
–50 –40 –30 –20 –10
10
0
10 20 30 40 50
Temperature, TA (°C)
60
70
80
90 100
Figure 11. tON/tOFF vs Temperature (VIN = 3.3 V)
trise
0
–50 –40 –30 –20 –10
0
10 20 30 40
Temperature (°C)
50
60
70
80
90 100
Figure 12. trise/tfall vs Temperature (VIN = 3.3 V)
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8.14.3 Typical AC Characteristics (TPS22922)
40
50
45
35
tOFF (TPS22922)
tfall (TPS22922)
40
30
25
30
trise/tfall (ms)
tON/tOFF (µs)
35
tON
25
20
trise
20
15
15
10
10
5
5
0
0
–40
0
25
Temperature, TA (°C)
70
–40
85
0
25
70
Temperature (°C)
85
Figure 14. trise/tfall vs Temperature (VIN = 3.3 V)
Figure 13. tON/tOFF vs Temperature (VIN = 3.3 V)
8.14.4 Typical AC Characteristics (TPS22922B)
160
200
150
180
140
130
160
140
110
100
120
tr /tf (µs)
tON/tOFF (µs)
trise
120
tON
100
80
90
80
70
60
50
60
40
40
tfall
30
20
TOFF
20
10
0
–50 –40 –30 –20 –10
0
0
10 20 30 40 50
Temperature, TA (°C)
60
70
80
90 100
–50 –40 –30 –20 –10
0
10 20 30 40
Temperature (°C)
50
60
70
80
90 100
Figure 16. trise/tfall vs Temperature (VIN = 3.3 V)
Figure 15. tON/tOFF vs Temperature (VIN = 3.3 V)
ON = 1.8 V
0.01
IOUT = 6.6 mA
tON= 40 µs
0.00
–0.01
Figure 17. tON Response
12
0.02
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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
–0.4
–0.6
–0.8
–1.0
0.03
RL = 500 W
VIN = 3.3 V
CL = 3 µF
ON = 1.8 V
0.02
0.01
IOUT = 6.6 mA
tON = 40 µs
Output Current (A)
0.03
RL = 500 W
VIN = 3.3 V
CL = 1 µF
ON Input Voltage (V)
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
–0.4
–0.6
–0.8
–1.0
Output Current (A)
ON Input Voltage (V)
8.14.5 Typical AC Characteristics (TPS22921 and TPS22922)
0.00
–0.01
Figure 18. tON Response
Copyright © 2008–2015, Texas Instruments Incorporated
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
Typical AC Characteristics (TPS22921 and TPS22922) (continued)
1.2
1.2
RL = 500 W
VIN = 1 V
CL = 0.1 µF
1.1
1.0
0.9
ON = 0.85 V
1.0
0.9
0.01
0.8
0.7
ON = 0.85 V
0.01
0.6
0.5
0.4
0.3
IOUT = 2 mA
0.2
tON = 100 µs
0.1
0.6
0.5
0.4
0.3
IOUT = 2 mA
0.2
tON = 145 µs
0.1
0.0
Output Current (A)
0.7
ON Input Voltage (V)
ON Input Voltage (V)
0.8
RL = 500 W
VIN = 1 V
CL = 1 µF
1.1
0.00
0.0
–0.1
–0.1
–0.2
–0.2
–0.3
–0.3
–0.4
–0.4
0.00
Figure 19. tON Response
Figure 20. tON Response
1.2
1.1
1.0
ON = 0.85 V
0.9
RL = 500 W
VIN = 1 V
CL = 3 µF
ON Input Voltage (V)
0.7
0.6
0.01
Output Current (A)
0.8
0.5
0.4
0.3
IOUT = 2 mA
0.2
tON = 160 µs
0.1
0.0
0.00
–0.1
–0.2
–0.3
–0.4
Figure 21. tON Response
8.14.6 Typical AC Characteristics (TPS22921)
RL = 500 W
VIN = 3.3 V
CL = 0.1 µF
1.20
1.10
3.50
3.40
0.012
3.20
0.011
VON
0.80
0.008
0.70
0.007
0.60
0.006
0.50
0.005
0.40
0.004
IOUT
0.30
0.003
0.20
0.002
0.10
0.001
0.000
0.00
–0.10
–0.22
–200
0
20
40
60
80
100
Time (µs)
120
140
Figure 22. tOFF Response
160
–0.001
–0.002
180
Output Current (A)
0.009
0.90
Control Input Voltage (V)
0.010
1.00
Control Input Voltage (V)
0.014
0.013
3.00
2.80
2.60
2.40
2.20
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.50
–2.0
RL = 10 W
VIN = 3.3 V
CL = 0.1 µF
IOUT
VON
0
2.0
4.0
6.0
8.0
10.0
Time (µs)
12.0
14.0
16.0
0.35
0.34
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
–0.04
–0.05
18.0
Output Current (A)
1.38
1.30
Figure 23. tOFF Response
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Typical AC Characteristics (TPS22921) (continued)
1.10
0.010
1.00
0.009
0.90
0.80
0.008
0.80
0.400
0.70
0.007
0.70
0.350
0.60
0.006
0.60
0.300
0.50
0.005
0.50
0.250
0.004
0.30
0.003
0.20
0.002
VON
0.10
0.001
0.200
0.40
IOUT
0.30
0.100
VON
0.10
0.050
0.000
0.00
0.000
–0.10
–0.001
–0.10
–0.050
–0.20
–0.002
–0.20
–0.100
–0.30
–0.003
–0.30
–0.004
–0.40
–20
–2.0
–1.0
0.0
1.0
2.0
Time (µs)
3.0
4.0
5.0
6.0 6.5
–0.150
–0.200
0
20
0.006
RL = 500 W
VIN = 1 V
CL = 0.1 µF
1.10
1.00
0.90
0.002
0.40
IOUT
0.001
0.20
VON
Output Current (A)
0.50
Control Input Voltage (V)
0.003
0.000
0.00
–0.10
–0.001
–0.20
–0.30
–0.002
20
40
60
80
100
Time (µs)
120
140
160
0.80
0.70
0.07
0.60
0.06
0.50
0.05
0.40
0.04
0.03
0.30
IOUT
0.20
0.01
0.00
0.00
–0.10
–0.01
–0.20
–0.02
–0.30
–0.03
–0.04
0.0
2.0
0.002
0.40
IOUT
0.001
0.20
VON
0.000
0.00
–0.10
–0.001
–0.20
–0.30
–0.002
1000
1500
2000 2500
Time (µs)
3000
3500
Figure 28. tOFF Response
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4000
4500
Output Current (A)
0.50
500
4.0
6.0
8.0
10.0
Time (µs)
12.0
14.0
16.0
18.0
0.12
RL = 10 W
VIN = 1 V
CL = 3.3 µF
0.90
0.003
0
0.02
VON
0.10
1.00
0.005
Control Input Voltage (V)
0.60
–0.40
–500
0.09
0.08
1.10
0.70
0.10
0.10
1.20
0.004
0.30
0.11
0.80
–0.40
–2.0
180
0.006
RL = 500 W
VIN = 1 V
CL = 3.3 µF
0.90
180
Figure 27. tOFF Response
1.20
1.00
160
0.12
Figure 26. tOFF Response
1.10
140
RL = 10 W
VIN = 1 V
CL = 0.1 µF
0.90
0.60
0
120
1.00
0.005
0.70
–0.40
–20
80
100
Time (µs)
1.20
0.004
0.10
60
1.10
0.80
0.30
40
Figure 25. tOFF Response
1.20
Control Input Voltage (V)
0.150
0.20
Figure 24. tOFF Response
Control Input Voltage (V)
0.450
0.00
–0.40
–3.5–3.0
14
0.500
Output Current (A)
IOUT
0.40
0.550
Output Current (A)
Control Input Voltage (V)
0.90
0.600
RL = 10 W
VIN = 3.3 V
CL = 3.3 µF
0.11
0.10
0.09
0.80
0.08
0.70
0.07
0.60
0.06
0.50
0.05
IOUT
0.40
0.04
0.30
0.03
0.20
0.02
VON
0.10
0.01
0.00
0.00
–0.10
–0.01
–0.20
–0.02
–0.30
–0.03
–0.40
–20
Output Current (A)
1.00
Output Current (A)
1.20
RL = 500 W
VIN = 3.3 V
CL = 3.3 µF
1.10
Control Input Voltage (V)
0.012
0.011
1.20
–0.04
0.0
20
40
60
80
100
Time (µs)
120
140
160
180
Figure 29. tOFF Response
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
0.02
ON = 1.8 V
0.01
IOUT = 6.6 mA
tOFF = 8 µs
0.00
–0.01
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
–0.4
–0.6
–0.8
–1.0
0.03
RL = 500 W
VIN = 3.3 V
CL = 1 µF
0.01
IOUT = 6.6 mA
0.00
tOFF = 50 µs
–0.01
Figure 31. tOFF Response
1.2
0.03
RL = 500 W
VIN = 3.3 V
CL = 3 µF
1.0
0.9
ON = 0.85 V
0.8
0.02
ON = 1.8 V
0.01
IOUT = 6.6 mA
0.6
0.5
0.4
0.3
IOUT = 2 mA
0.2
tOFF = 20 µs
0.1
tOFF = 90 µs
0.0
0.00
0.00
–0.1
–0.2
–0.3
–0.4
–0.01
Figure 33. tOFF Response
1.2
1.2
RL = 500 W
VIN = 1 V
CL = 1 µF
1.1
1.0
ON = 0.85 V
0.8
1.0
0.9
0.01
0.5
0.4
IOUT = 2 mA
tOFF = 240 µs
0.1
0.6
0.5
0.4
0.3
0.00
tOFF = 400 µs
0.0
–0.1
–0.1
–0.2
–0.2
–0.3
–0.3
–0.4
–0.4
Figure 34. tOFF Response
IOUT = 2 mA
0.2
0.1
0.0
Output Current (A)
Output Current (A)
0.7
ON Input Voltage (V)
ON Input Voltage (V)
ON = 0.85 V
0.8
0.01
0.6
0.2
RL = 500 W
VIN = 1 V
CL = 3 µF
1.1
0.7
0.3
Output Current (A)
0.01
Output Current (A)
0.7
Figure 32. tOFF Response
0.9
RL = 500 W
VIN = 1 V
CL = 0.1 µF
1.1
ON Input Voltage (V)
ON Input Voltage (V)
Figure 30. tOFF Response
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
–0.4
–0.6
–0.8
–1.0
0.02
ON = 1.8 V
Output Current (A)
0.03
RL = 500 W
VIN = 3.3 V
CL = 0.1 µF
Output Current (A)
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
–0.4
–0.6
–0.8
–1.0
ON Input Voltage (V)
ON Input Voltage (V)
8.14.7 Typical AC Characteristics (TPS22922)
0.00
Figure 35. tOFF Response
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8.14.8 Typical AC Characteristics (TPS22922B)
8.00
7.00
5.00
4.00
3.00
VON
2.00
1.00
0.00
–1.00
Control Input Voltage (V)
6.00
IOUT
–2.00
RL = 500 W
VIN = 3.3 V
CL = 0.1 µF
–3.00
–4.00
–5.00
–6.00
100
150
200
250
Time (µs)
300
350
400
450
400.0
350.0
300.0
200.0
150.0
VON
100.0
50.0
0.00
–50.0
10.00
–250.0
–300.0
0
100
8.00
7.00
6.00
IOUT
3.00
VON
2.00
1.00
0.00
–1.00
Output Current (mA)
5.00
4.00
–2.00
RL = 500 W
VIN = 3.3 V
CL = 3.3 µF
–3.00
–4.00
–5.00
–6.00
300
400
500
Time (ms)
600
700
800
900
5.00
4.50
4.00
3.50
3.00
2.00
1.50
1.00
IOUT
0.50
0.00
–0.50
RL = 500 W
VIN = 1 V
CL = 0.1 µF
–1.50
–2.00
–2.50
200
400
600
800
1000
Time (µs)
1200
1400
Figure 40. tON Response
16
–1.00
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1600
–3.00
1800
Output Current (A)
2.50
Control Input Voltage (V)
Control Input Voltage (V)
2.20
0
400
500
Time (µs)
600
700
800
900
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–100
450.0
400.0
350.0
300.0
250.0
IOUT
200.0
150.0
VON
100.0
50.0
0.00
–50.0
–100.0
RL = 10 W
VIN = 3.3 V
CL = 3.3 µF
–150.0
–200.0
–250.0
–300.0
0
100
200
300
400
500
Time (ms)
600
700
800
900
Figure 39. tON Response
2.50
2.40
VON
300
499.9
Figure 38. tON Response
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–200
200
2.20
Control Input Voltage (V)
Control Input Voltage (V)
2.20
200
–200.0
2.50
2.40
9.00
100
–150.0
Figure 37. tON Response
2.50
2.40
0
–100.0
RL = 10 W
VIN = 3.3 V
CL = 0.1 µF
Figure 36. tON Response
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–100
250.0
IOUT
Output Current (mA)
50
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–100
2.50
2.40
249.9
220.0
2.20
200.0
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–200
VON
0
IOUT
200
400
600
800
1000
Time (µs)
1200
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.00
–20.0
–40.0
RL = 10 W
–60.0
VIN = 1 V
–80.0
CL = 0.1 µF
–100.0
–120.0
–150.0
1400 1600 1800
Output Current (A)
0
450.0
2.20
Output Current (mA)
Control Input Voltage (V)
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–50
499.9
2.50
2.40
9.00
2.20
Output Current (mA)
10.00
2.50
2.40
Figure 41. tON Response
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
TPS22921, TPS22922, TPS22922B
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
5.00
2.50
2.40
4.50
4.00
3.50
3.00
2.50
2.00
1.50
VON
1.00
IOUT
0.50
0.00
–0.50
Output Current (mA)
–1.00
RL = 500 W
VIN = 1 V
CL = 3.3 µF
–1.50
–2.00
–2.50
200
400
600
800
1000
Time (µs)
1200
1400
1600
–3.00
1800
249.9
220.0
2.20
200.0
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–500
VON
0
IOUT
500
1000
Figure 42. tON Response
10.00
7.00
6.00
IOUT
3.00
2.00
1.00
VON
0.00
–1.00
Output Current (mA)
5.00
4.00
–2.00
RL = 500 W
VIN = 3.3 V
CL = 0.1 µF
–3.00
–4.00
–5.00
–6.00
10
20
30
40
50
Time (µs)
60
70
80
450.0
2.20
8.00
Control Input Voltage (V)
Control Input Voltage (V)
2.20
499.9
2.50
2.40
9.00
0
90
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
VON
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–10
0
400.0
350.0
300.0
250.0
10.00
100.0
50.0
0.00
–50.0
7.00
6.00
4.00
IOUT
3.00
2.00
1.00
VON
0.00
–1.00
RL = 500 W
VIN = 3.3 V
CL = 3.3 µF
–2.00
–3.00
–4.00
–5.00
800
1000
Time (µs)
1200
1400
Figure 46. tOFF Response
1600
–6.00
1800
Output Current (mA)
5.00
600
–150.0
–200.0
–250.0
–300.0
10
20
30
40
50
Time (µs)
60
80
70
90
499.9
450.0
2.20
8.00
Control Input Voltage (V)
Control Input Voltage (V)
2.20
400
–100.0
RL = 10 W
VIN = 3.3 V
CL = 0.1 µF
2.50
2.40
9.00
200
150.0
Figure 45. tOFF Response
2.50
2.40
0
200.0
IOUT
Figure 44. tOFF Response
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–200
3000
Figure 43. tON Response
2.50
2.40
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–10
1500 2000 2500
Time (µs)
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.00
–20.0
–40.0
RL = 10 W
–60.0
VIN = 1 V
–80.0
CL = 3.3 µF
–100.0
–120.0
–150.0
3500 4000 4500
Output Current (mA)
0
2.50
2.40
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
VON
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–50
0
400.0
350.0
300.0
250.0
200.0
IOUT
150.0
100.0
50.0
0.00
–50.0
Output Current (mA)
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–200
Control Input Voltage (V)
Control Input Voltage (V)
2.20
Output Current (mA)
Typical AC Characteristics (TPS22922B) (continued)
–100.0
RL = 10 W
VIN = 3.3 V
CL = 3.3 µF
–150.0
–200.0
–250.0
–300.0
50
100
150
200
250
Time (µs)
300
350
400
450
Figure 47. tOFF Response
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Product Folder Links: TPS22921 TPS22922 TPS22922B
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5.00
2.50
2.40
4.50
4.00
3.50
3.00
2.50
2.00
IOUT
1.50
1.00
VON
0.50
0.00
–0.50
Output Current (mA)
–1.00
RL = 500 W
VIN = 1 V
CL = 0.1 µF
–1.50
–2.00
–2.50
–3.00
0
10
20
30
40
50
Time (µs)
60
70
80
90
2.50
2.40
249.9
220.0
2.20
200.0
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–10
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.00
–20.0
–40.0
–60.0
–80.0
–100.0
–120.0
–150.0
IOUT
VON
RL = 10 W
VIN = 1 V
CL = 0.1 µF
0
10
Figure 48. tOFF Response
5.00
4.50
4.00
3.50
3.00
2.00
1.50
VON
1.00
IOUT
0.50
0.00
–0.50
RL = 500 W
VIN = 1 V
CL = 3.3 µF
–1.50
–2.00
–2.50
200
400
600
800
1000
Time (µs)
1200
1400
Figure 50. tON Response
18
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1600
–3.00
1800
Output Current (mA)
2.50
Control Input Voltage (V)
Control Input Voltage (V)
2.20
0
30
40
50
Time (µs)
60
70
80
90
Figure 49. tOFF Response
2.50
2.40
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–200
20
2.50
2.40
249.9
220.0
2.20
200.0
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–50
IOUT
VON
0
50
100
150
200
250
Time (µs)
300
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.00
–20.0
–40.0
RL = 10 W
–60.0
VIN = 1 V
–80.0
CL = 3.3 µF
–100.0
–120.0
–150.0
400
350
450
Output Current (A)
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
–0.20
–0.40
–0.60
–0.80
–1.00
–1.20
–1.40
–1.50
–10
Control Input Voltage (V)
Control Input Voltage (V)
2.20
Output Current (mA)
Typical AC Characteristics (TPS22922B) (continued)
Figure 51. tOFF Response
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
TPS22921, TPS22922, TPS22922B
www.ti.com
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
9 Parameter Measurement Information
VIN
ON
VOUT
(A)
RL
CL
+
–
TPS22921/22/22B
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 52. Test Circuit and tON/tOFF Waveforms
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
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10 Detailed Description
10.1 Overview
The TPS2292x is a single-channel, 2-A load switch in a small, space-saving CSP-6 package. These devices
implement a P-channel MOSFET to provide a low ON-resistance for a low voltage drop across the device. A
controlled rise time is used in applications to limit the inrush current.
10.2 Functional Block Diagram
VIN
A2, B2
Turn-On Slew Rate
Controlled Driver
ON
Control
Logic
C2
ESD Protection
A1, B1
VOUT
Output Discharge
(TPS22922/TPS22922B Only)
C1
GND
10.3 Feature Description
10.3.1 ON/OFF Control
The ON pin controls the state of the switch. Activating ON continuously holds the switch in the on state. ON is
active high and has a low threshold making it capable of interfacing with low-voltage signals. The ON pin is
compatible with standard GPIO logic threshold, and it can be used with any microcontroller with 1.2-V, 1.8-V, 2.5V or 3.3-V GPIOs.
10.3.2 Quick Output Discharge
The TPS22922 and TPS22922B includes the Quick Output Discharge (QOD) feature. When the switch is
disabled, a discharge resistance with a typical value of 65 Ω is connected between the output and ground. This
resistance pulls down the output and prevents it from floating when the device is disabled.
10.4 Device Functional Modes
Table 1 lists the VOUT pin connections to for a particular device as determined by the ON pin.
Table 1. VOUT Function Table
20
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ON
TPS22921
TPS22922/2B
L
Open
GND
H
VIN
VIN
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
11 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
11.1 Application Information
11.1.1 Input Capacitor (Optional)
To limit the voltage drop on the input supply caused by transient inrush currents when the switch turns on into a
discharged load capacitor, a capacitor must be placed between VIN and GND. A 1-μF ceramic capacitor, CIN,
placed close to the pins is usually sufficient. Higher values of CIN can be used to further reduce the voltage drop
during higher current application. When switching a heavy load, TI recommends using an input capacitor about
10 or more times higher than the output capacitor in order to avoid any supply drop.
11.1.2 Output Capacitor (Optional)
Because of 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.
11.2 Typical Application
VBATT
VIN
SMPS
ON
(see Note A)
CIN = 1 µF
VOUT
LOAD
TPS22921/22/22B
CL
CL
RL
OFF
GND
GND
GND
A.
Switched-mode power supply
Figure 53. Typical Application
11.2.1 Design Requirements
Table 2. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
VIN
1.8 V
CL
4.7 µF
Load current
2A
Ambient Temperature
25 °C
Maximum inrush current
200 mA
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11.2.2 Detailed Design Procedure
11.2.2.1 Managing Inrush Current
When the switch is enabled, the output capacitors must be charged up from 0 V to the set value (1.8 V in this
example). This charge arrives in the form of inrush current. Inrush current can be calculated using the following
equation:
dV
IINRUSH = CL ´ OUT
dt
where
•
•
•
CL = Output capacitance
dVOUT = Output voltage
dt = Rise time
(1)
The TPS22921/2/2B offers a controlled rise time for minimizing inrush current. This device can be selected
based upon the minimum acceptable rise time which can be calculated using the design requirements and the
inrush current equation. An output capacitance of 4.7 µF will be used because the amount of inrush current
increases with output capacitance:
200 mA = 4.7 µF × 1.8V / dt
where
•
dt = 42.3 µs
(2)
To ensure an inrush current of less than 200 mA, a device with a rise time greater than 42.3 µs must be used.
The TPS22922B has a typical rise time of 200 µs at 1.8 V which meets the above design requirements. The
TPS22921/2 has a faster rise time of 30 µs at 1.8 V, and this would result in an inrush current larger than
desired.
11.2.2.2 VIN to VOUT Voltage Drop
The voltage drop from VIN to VOUT is determined by the ON-resistance of the device and the load current. RON
can be found in Electrical Characteristics and is dependent on temperature. When the value of RON is found, the
following equation can be used to calculate the voltage drop across the device:
ΔV = ILOAD × RON
where
•
•
•
ΔV = Voltage drop across the device
ILOAD = Load current
RON = ON-resistance of the device
(3)
At VIN = 1.8 V, the TPS22921/2/2B has an RON value of 33 mΩ. Using this value and the defined load current,
the above equation can be evaluated:
ΔV = 2 A × 33 mΩ
where
•
ΔV = 66 mV
(4)
Therefore, the voltage drop across the device will be 66 mV.
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TPS22921, TPS22922, TPS22922B
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SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
11.2.3 Application Curve
Figure 54 shows the expected voltage drop across the device for different load currents and input voltages.
500
450
400
V oltag e D rop (m V )
350
300
Vdrop = 1.0 V
250
Vdrop = 1.2 V
200
Vdrop = 1.8 V
150
Vdrop = 2.5 V
100
Vdrop = 3.3 V
50
0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Load Current (A)
Figure 54. Voltage Drop vs Load Current
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12 Power Supply Recommendations
The device is designed to operate with a VIN range of 0.9 V to 3.6 V. This supply must be well regulated and
placed as close to the device terminals as possible. It must also be able to withstand all transient and load
currents, using a recommended input capacitance of 1 µF if necessary. If the supply is located more than a few
inches from the device terminals, additional bulk capacitance may be required in addition to the ceramic bypass
capacitors. If additional bulk capacitance is required, an electrolytic, tantalum, or ceramic capacitor of 10 µF may
be sufficient.
13 Layout
13.1 Layout Guidelines
For best performance, VIN, VOUT, and GND traces should be as short and wide as possible to help minimize the
parasitic electrical effects. 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 operation.
For higher reliability, the maximum IC junction temperature, TJ(max), should be restricted to 125˚C under normal
operating conditions. Junction temperature is directly proportional to power dissipation in the device and the two
are related by
TJ = TA + θJA × PD
where
•
•
•
•
TJ = Junction temperature of the device
TA = Ambient temperature
PD = Power dissipation inside the device
θJA = Junction to ambient thermal resistance. See Thermal Information section of the data sheet. This
parameter is highly dependent on board layout.
(5)
13.2 Layout Example
Figure 55. Layout Recommendation
24
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Product Folder Links: TPS22921 TPS22922 TPS22922B
TPS22921, TPS22922, TPS22922B
www.ti.com
SLVS749C – NOVEMBER 2008 – REVISED JANUARY 2015
14 Device and Documentation Support
14.1 Related Links
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to sample or buy.
Table 3. Related Links
PARTS
PRODUCT FOLDER
SAMPLE & BUY
TECHNICAL
DOCUMENTS
TOOLS &
SOFTWARE
SUPPORT &
COMMUNITY
TPS22921
Click here
Click here
Click here
Click here
Click here
TPS22922
Click here
Click here
Click here
Click here
Click here
TPS22922B
Click here
Click here
Click here
Click here
Click here
14.2 Trademarks
All trademarks are the property of their respective owners.
14.3 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
14.4 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
15 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TPS22921 TPS22922 TPS22922B
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PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
TPS22921YFPR
ACTIVE
DSBGA
YFP
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
-40 to 85
(3Y, 3Y3)
TPS22921YZPR
ACTIVE
DSBGA
YZP
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
-40 to 85
(3Y3, 3Y5)
TPS22921YZTR
ACTIVE
DSBGA
YZT
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
-40 to 85
(3Y3, 3Y5)
TPS22922BYFPR
ACTIVE
DSBGA
YFP
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
TPS22922BYZPR
ACTIVE
DSBGA
YZP
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
TPS22922YFPR
ACTIVE
DSBGA
YFP
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
TPS22922YZPR
ACTIVE
DSBGA
YZP
6
3000
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
(3Z, 3Z3)
-40 to 85
(3Z, 3Z3)
(2Z, 2Z3)
-40 to 85
(2Z, 2Z3)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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