Data Sheets - Skyworks Solutions, Inc.

DATA SHEET
SKY84632: 3A Slew-Rate Controlled Load Switch with
Reverse Blocking
Applications
Description
 Smartphones, tablet PCs, and portable devices
The SKY84632 SmartSwitch is a slew rate controlled P-channel
MOSFET power switch designed for high side load switching
applications. This switch operates with inputs ranging from 1.5 V
to 5.5 V, making it ideal for 1.8 V, 3 V, and 5 V systems. It
connects/disconnects up to 3 A continuous loads powered from
the DC power rail with stringent off-state current targets and high
load capacitances (up to 100 F) through enable control. The
integrated low-impedance PMOSFET switch, together with typical
2.7 ms turn-on slew rate control, prevents large inrush current
and excessive voltage drop on power rails.
Features
 1.5 V to 5.5 V input voltage range
 3 A Maximum continuous current capability
 Typical RDS(ON)
 38 m at VIN = 5.5 V
 40 m at VIN = 4.5 V
 76 m at VIN = 1.8 V
 97 m at VIN = 1.5 V
The SKY84632 has the reverse blocking feature that blocks
unexpected reverse current from OUT to IN during the PMOSFET
on and off states. The typical 9 A quiescent current makes it
ideal for power saving applications. The exceptional low off-state
current drain (maximum 1 A) facilitates compliance with standby
power requirements. The switch enable control is active high with
an internal pull-down resistor that eliminates the need for an
external pull-down resistor. The SKY84632 also includes overtemperature protection and recovers automatically when the fault
is removed.
 Reverse blocking (RB)
 Input hot plug capability
 Over-temperature protection
 Typical 2.7 ms rise time for slew rate/inrush control
 Low quiescent current (typical 9 A)
 Less than 1 A off supply current
 Enable control
 Logic CMOS IO meets JESD76 standard
 Active high with internal pull-down resistor
 Ultra small, low-profile WLCSP (6-bump, 0.5 mm pitch,
0.995 х 1.495 mm) package (MSL1, 260 °C per
JEDEC-J-STD-020)
The SKY84632 is available in a 6-bump, 0.995 х 1.495 mm,
Wafer-Level Chip-Scale Package (WLCSP) with 0.5 mm pin pitch,
and is rated over the –40 °C to +85 °C temperature range.
A typical application circuit is shown in Figure 1. The pin
configuration is shown in Figure 2. Signal pin assignments and
functional pin descriptions are provided in Table 1.
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
VIN: 1.5 V to 5.5 V
VOUT
OUT
IN
CIN
COUT
SKY84632
1 μF to 22 μF
ON
OFF
EN
0.1 μF to 100 μF
GND
tc1
Figure 1. SKY84632 Typical Application Circuit
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
OUT
A1
A2
IN
OUT
B1
B2
IN
GND
C1
C2
EN
tc2
Figure 2. SKY84632 Pinout – 6-Bump WLCSP
(Top View)
Table 1. SKY84632 Signal Descriptions
Pin #
Name
A1, B1
OUT
A2, B2
IN
C1
GND
C2
EN
Description
Load switch output. Put at least 0.1 F output capacitor between OUT and GND.
Supply input. Put at least 1 F input capacitor between IN and GND.
Ground.
Enable input. Active high with internal pull-down resistor.
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY84632 are provided in
Table 2. The recommended operating conditions are specified in
Table 3, and electrical specifications are provided in Table 4.
Typical performance characteristics of the SKY84632 are
illustrated in Figures 5 through 22.
Timing Diagrams
Figure 3 shows the tR and tF of VOUT. Figure 4 illustrates the
relationship between tD(ON) and tD(OFF).
Table 2. SKY84632 Absolute Maximum Ratings (Note 1)
Symbol
Minimum
Maximum
Units
IN to GND
Parameter
VIN
–0.3
+6
V
EN to GND
VEN
–0.3
VIN + 0.3
V
OUT to GND
VOUT
–0.3
Maximum continuous DC output current (Note 2)
ISW
Maximum junction operating temperature
Maximum soldering temperature (at leads, 10 sec)
TJ
Typical
VIN + 0.3
V
3
–40
A
+150
ºC
TLEAD
300
ºC
Thermal resistance, junction to ambient (Note 3)
θJA
136
ºC/W
Maximum power dissipation
PD
0.9
W
Note 1: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal value. Exceeding any of the limits listed may result in permanent damage to the device.
Note 2: Support IN high voltage pulse up to 7 V lasting 8 s.
Note 3: Mounted on FR4 circuit board.
CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device
must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body
or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times.
Table 3. SKY84632 Recommended Operating Conditions
Parameter
Input voltage
Symbol
Minimum
Typical
Maximum
VIN
1.5
Enable threshold
VENH
1.15
Disable threshold
VENL
0.6
V
Continuous switch output current
ISW
3
A
Operating ambient temperature range
TA
+85
°C
–40
5.5
Units
V
V
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Table 4. SKY84632 Electrical Specifications (1 of 2) (Note 1)
(VIN = 1.5 V to 5.5 V, TA = –40 °C to 85 °C, Typical Values are at VIN = 4.5 V and TA = 25 °C, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Input voltage
VIN
Off supply current
IQ(OFF)
VEN = GND, VOUT = Open
Off switch current
ISD
VEN = GND, VOUT = GND, TA = –40 °C to +85 °C
Quiescent current
IQ
On-resistance
Min
Typical
1.5
Max
5.5
V
1
A
0.2
4
A
12
A
VEN = High, IOUT = 0 A
9
VIN = 5.5 V, IOUT = 3 A
40
VIN = 5.5 V, IOUT = 2 A
39
VIN = 5.5 V, IOUT = 1 A, TA = 25°C
38
VIN = 4.5 V, IOUT = 3 A
42
VIN = 4.5 V, IOUT = 2 A
41
VIN = 4.5 V, IOUT = 1 A, TA = 25°C
40
VIN = 3.3 V, IOUT = 500 mA, TA = 25°C
47
VIN = 2.5 V, IOUT = 500 mA, TA = 25°C
56
VIN = 1.8 V, IOUT = 250 mA, TA = 25°C
76
VIN = 1.5 V, IOUT = 250 mA, TA = 25°C
97
53
m
RDS(ON)
En input logic high voltage
En input logic low voltage
VIH
Units
VIN = 1.5 V to 5.5 V
54
122
1.15
V
VIN = 1.8 V to 5.5 V
0.55
VIN = 1.5 V to 1.8 V
0.5
VIL
V
1
A
12
m
En input leakage current
IEN
VEN = VIN or GND
Pull-down resistance at EN bump
REN_PD
VEN = VIN = 1.5 V to 5.5 V, TA = –40 °C to
+85 °C
RB protection trip point
VT_RB
VOUT – VIN
45
mV
RB protection release trip point
VR_RB
VIN – VOUT
25
mV
70
mV
6
9
Reverse Blocking (RB)
RB hysteresis
2
ISD_OUT
VEN = 0 V, VOUT = 5.5 V, VIN = GND (Note 2)
RB release, device ON
tRB_ON
VOUT – VIN = 100 mV, EN = High
4
s
RB release, device OFF
tRB_OFF
VOUT – VIN = 100 mV, EN = Low
2.5
s
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4
A
Reverse current at OUT when EN shuts down
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Table 4. SKY84632 Electrical Specifications (2 of 2) (Note 1)
(VIN = 1.5 V to 5.5 V, TA = –40 °C to 85 °C, Typical Values are at VIN = 4.5 V and TA = 25 °C, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
Dynamic Characteristics
Turn-on delay (Note 3)
tD(ON)
VOUT rise time (Note 3)
tR
Turn-on time (Note 4)
tON
Turn-on delay (Note 3)
tD(ON)
1.7
VIN = 4.5 V, RL = 5 , CL = 100 F, TA = 25°C
2.7
1.8
VIN = 4.5 V, RL = 150 , CL = 100 F,
TA = 25°C
VOUT rise time (Note 3)
tR
Turn-on time (Note 4)
tON
Turn-off delay (Note 3)
tD(OFF)
2
tF
Turn-off time (Note 5)
tOFF
ms
3.8
3
VIN = 4.5 V, RL = 150 , CL = 100 F,
TA = 25°C
VOUT fall time (Note 3)
ms
4.4
35
ms
38
Over-Temperature Protection
Over-temperature shutdown threshold
TSD
Temperature increases
Over-temperature shutdown hysteresis
TSD_HYS
150
ºC
20
ºC
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: This parameter’s performance is only guaranteed in a completely dark environment. Exposing the WLCSP device to direct sunlight causes the parameter to slightly exceed the
maximum value.
Note 3: Turn-on/turn-off delay, and rise/fall times are defined in Figures 3 and 4.
Note 4: tON = tD(ON) + tR
Note 5: tOFF = tD(OFF) + tF.
tR
tF
90%
90%
VOUT
10%
10%
tc4
Figure 3. Timing Diagram of tR/tF
50%
50%
VEN
90%
tD(OFF)
VOUT
10%
tD(ON)
tc5
Figure 4. Timing Diagram of tD(ON)/tD(OFF)
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Typical Performance Characteristics
1.0
2.0
1.5
0.8
1.0
ISD (μA)
ISD (μA)
0.5
0.0
-0.5
-1.0
0.6
0.4
25 °C
0.2
85 °C
VIN = 5.5 V
-1.5
−40 °C
VIN = 1.5 V
0.0
-2.0
-40
-15
10
35
60
1.5
85
2.0
2.5
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Temperature (°C)
Figure 6. Shutdown Current vs Input Voltage
Figure 5. Shutdown Current vs Temperature
15
15
12
12
9
9
IQ (μA)
IQ (μA)
3.0
6
VIN = 5.5 V
3
6
25 ºC
3
85 ºC
VIN = 1.5 V
−40 °C
0
0
-40
-15
10
35
60
1.5
85
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Temperature (°C)
Figure 8. Quiescent Current vs Input Voltage
Figure 7. Quiescent Current vs Temperature
120
120
100
100
25 °C
−40 °C
RDS(ON) (mΩ)
RDS(ON) (mΩ)
85 °C
80
60
40
80
60
40
VIN = 5.5 V, IOUT = 1000 mA
20
VIN = 3.3 V, IOUT = 500 mA
20
VIN = 1.8 V, IOUT = 250 mA
VIN = 1.5 V, IOUT = 250 mA
0
0
-40
-15
10
35
Temperature (°C)
Figure 9. RDS(ON) vs Temperature
60
85
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Input Voltage (V)
Figure 10. RDS(ON) vs Input Voltage
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5.0
5.5
DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
1.2
1.2
VIN = 5.5 V
1.1
1.1
VIN = 1.5 V
1.0
VIH (V)
VIH (V)
1.0
0.9
0.9
0.8
0.8
0.7
0.7
0.6
25 °C
−40 °C
85 °C
0.6
-40
-15
10
35
60
1.5
85
2.0
2.5
Temperature (°C)
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 11. EN Input Logic High Voltage vs Temperature
Figure 12. EN Input Logic High Voltage vs Input Voltage
1.2
1.2
VIN = 5.5 V
1.1
1.1
VIN = 1.5 V
1.0
VIL (V)
VIL (V)
1.0
0.9
0.9
0.8
0.8
0.7
0.7
0.6
0.6
25 °C
- 40 °C
85 °C
-40
-15
10
35
60
85
1.5
2.0
Temperature (°C)
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 13. EN Input Logic Low Voltage vs Temperature
Figure 14. EN Input Logic Low Voltage vs Input Voltage
1.2
VIH & VIL (V)
1.1
EN
2 V/div
0
VOUT
2 V/div
0
1.0
0.9
0.8
VIH
0.7
IOUT
500 mA/div 0
VIL
0.6
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 15. EN Input Logic High/Low Voltage vs Input Voltage
Time (2 ms/div)
Figure 16. Output Turn-On Time
(VIN = 4.5 V, CIN = 10 F, COUT = 100 F, RL = 5 )
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
EN
2 V/div
EN
2 V/div
0
VOUT
2 V/div
0
0
VOUT
2 V/div
0
IOUT
20 mA/div
0
IOUT
0
20 mA/div
Time (2 ms/div)
Time (10 ms/div)
Figure 17. Output Turn-On Time
(VIN = 4.5 V, CIN = 10 F, COUT = 100 F, RL = 150)
Figure 18. Output Turn-Off Time
(VIN = 4.5 V, CIN = 10 F, COUT = 100 F, RL = 150)
4.0
40
35
tD(ON) & tD(OFF) (ms)
tD(ON) & tD(OFF) (ms)
3.2
2.4
1.6
0.8
30
25
20
15
10
tR
tF
tD(ON)
5
tD(OFF)
0.0
0
-40
-15
10
35
60
85
-40
Temperature (°C)
-15
10
35
60
85
Temperature (°C)
Figure 19. Turn On/Off Delay Time vs Temperature
Figure 20. Turn On Rising & Trun-Off Falling Time
vs Temperature
VIN
2 V/div
VIN
2 V/div
0
VOUT
0
2 V/div
VOUT
2 V/div 0
0
IOUT
1 A/div 0
IOUT
0
20 mA/div
Time (20 μs/div)
Figure 21. RB Response Time During On
(VIN = VEN = 3.6 V, VOUT = 5.5 V, CIN = 10 F, COUT = 100 F)
Time (40 μs/div)
Figure 22. RB Response Time During Off
(VIN = VEN = 0 V, VOUT = 5.5 V, CIN = 10 F, COUT = 100 F)
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Reverse Blocking
IN
OUT
EN
Control Logic
Turn-On Slew Rate
Controlled Driver
R EN
Over-Temp
Protection
GND
tc3
Figure 23. SKY84632 Functional Block Diagram
Functional Description
ILOAD = Load current in mA
The SKY84632 is an integrated low-RDS(ON) P-channel load
switch with enable activity and reverse blocking. A wide input
voltage range from 1.5 V to 5.5 V allows the SKY84632 to be
compatible with GPIO/CMOS input. Logic high at the EN bump
activates the device. The reverse blocking feature prevents
current flow from output to input at the load switch for both
on/off states. The SKY84632 typically consumes 9 A when
operating. When switched off, the device draws less than 1 A.
The SKY84632 also integrates over-temperature protection for
high ambient temperature or junction temperature caused by
excess current.
A functional block diagram of the SKY84632 is provided in
Figure 23.
For example, the SKY84632 has a 2.7 ms of slew rate capability
under 4.5 V at 100 F of COUT and no load, so inrush current
can be minimized under 200 mA as Figure 24 shows.
EN
2 V/div
0
VOUT
2 V/div
0
IIN
0
100 mA/div
Time (2 ms/div)
Application Information
Slew Rate and Inrush Current Control
To avoid large inrush current when the load switch is turned on,
the slew rate controller feature allows the output voltage to rise
slowly. The inrush current is dependent on slew rate control
capability and output capacitance as expressed by:
IINRUSH = ILOAD +
COUT × (VIN - VOUT)
tR
Figure 24: Inrush Current Waveform
(VIN = 5.0 V, CIN = 10 F, COUT = 100 F, No Load)
High inrush current makes the input voltage drop. The voltage
drop value depends on the inrush current, power line equivalent
parasitic resistance, and input capacitor. A large input voltage
drop can cause system application problems.
Reverse Blocking
Where:
COUT = Output capacitance in F
VIN =
Input voltage in V
tR: =
Rise time at VOUT in ms
The reverse blocking feature protects the input source against
current flow from output to input regardless of whether the load
switch is on or off.
VINITIAL = Initial voltage at COUT in V
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Thermal Protection
Layout Guidance
The SKY84632 includes thermal protection that disables the
load switch when the die temperature reaches 140 °C. It
automatically restarts when the temperature drops by 15 °C or
more.
For best performance of the SKY84632, the following guidelines
should be followed when designing the PCB layout:
When an overload or output short to GND occurs, the power
dissipation on device increases rapidly, triggering the thermal
protection to prevent damage to the part.
 Connect the input/output capacitor to GND as close as
possible to decrease the effect of parasitic inductance and to
get a better noise filtering effect.
 Make the power trace as short and wide as possible,
including the input/output power lines
Input Capacitor
Select a low Equivalent Series Resistance (ESR) ceramic
capacitor with a value of at least 1 F as the input capacitor.
The input capacitor should be placed as close to the IN and GND
bumps as possible to minimize the stray resistance from the
device to the input power source.
Evaluation Board Description
The SKY84632 Evaluation Board is used to test the performance
of the SKY84632. An Evaluation Board schematic diagram is
provided in Figure 25. The PCB layout is shown in Figures 26
and 27. Component values for the SKY84632 Evaluation Board
are listed in Table 5.
Output Capacitor
Select a low ESR ceramic capacitor with a value of at least
0.1 F as the output capacitor. The output capacitor should be
placed as close to the OUT and GND bumps as possible to
minimize the parasitic board inductance against forcing VOUT
below GND when the switch is on.
Package Information
Typical case markings for the 6-bump WLCSP are shown in
Figure 28. Package dimensions are shown in Figure 29, and the
tape and reel dimensions are provided in Figure 30.
IN
OUT
VIN: 1.5 V to 5.5 V
VOUT
OUT
IN
C1
C3
SKY84632
10 F
EN
IN
C2(open)
100 F
GND
GND
tc6
Figure 25. SKY84632 Evaluation Board Schematic
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DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Figure 26. SKY84632 Evaluation Board PCB Top Side
Figure 27. SKY84632 Evaluation Board PCB Bottom Side
Table 5. SKY84632 Evaluation Board Bill of Materials
Component
Part Number
Description
Manufacturer
U1
SKY84632
3A Slew-Rate Controlled Load Switch with Reverse Blocking
Skyworks
C1
GRM188R60J106ME47D
Cap Ceramic, 10 F, 0603 X5R, 6.3 V, 20%
Murata
C2
GRM188R61E104KA01D
Cap Ceramic, 0.1 F, 0603 X5R, 25 V, 10%
Murata
C3
GRM31CR60J107ME39L
Cap Ceramic, 100 F, 1206 X5R, 6.3 V, 20%
Murata
Pin 1
Indicator
Skyworks Part #
Wafer Batch
Number
Figure 28. Typical Case Markings
(Top View)
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11
0.695 + 0.085/–0.084
0.995
0.450 ± 0.06
0.150–0.200 Ref.
0.250 ± 0.005
0.250 ± 0.005
DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
6X ø0.315 ± 0.047
0.150–0.200 Ref.
A
Bump A1 Indicator
(Min. 0.100 Diam.)
A
0
B
0.500 ± 0.005
C
1.495
B
C
1
0.500 ± 0.005
2
2
0.247 Ref.
1
0.245 + 0.025/–0.024
0.247 Ref.
Bump Side Down
Side View
Bump Side Up
All measurements are in millimeters
S3486
Figure 29. SKY84632 6-Bump WLCSP Package Dimensions
4.00 ± 0.10
2.00 ± 0.05
0.254 ± 0.02
ø1.50 ± 0.10
4.00 ± 0.10
5° Max.
1.68 ± 0.05 (Bo)
Pin #1
Indicator
0.83 ± 0.05 (Ko)
8.00 + 0.30/–0.10
3.50 ± 0.05
1.75 ± 0.10
ø0.50 ± 0.05
1.18 ± 0.05 (Ao)
5.4± 0.1
0.062± 0.013
Polyester Film
Notes:
Cross-Section of Cover Tape
1. Carrier tape: Black conductive polycarbonate
2. Cover tape: Transparent conductive material
3. 10 sprocket hole pitch cumulative tolerance: ± 0.20 mm
4. Pocket position relative to sprocket hole measured as true position of pocket
5. All dimensions are in millimeters
Y0019
Figure 30. SKY84632 Tape and Reel Dimensions
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July 30, 2013 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202090D
DATA SHEET • SKY84632 3A SLEW-RATE CONTROLLED LOAD SWITCH WITH REVERSE BLOCKING
Ordering Information
Model Name
SKY84632 Load Switch with Reverse Blocking
Manufacturing Part Number (Note 1)
Evaluation Board Part Number
SKY84632-11-001
SKY84632-11-001-EVB
Note 1: Sample stock is generally held on part numbers listed in BOLD.
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