SiP4280
Vishay Siliconix
Slew Rate Controlled Load Switch
FEATURES
D
D
D
D
D
D
D
D
D
1.8 V to 5.5 V Input Voltage range
Very Low R
DS(ON)
, typically 80 m (5 V)
Slew rate limited turn–on time options
SiP4280–1: 1 ms
SiP4280–3: 100
ms
Fast shutdown load discharge option
Low quiescent current
4 kV ESD Rating
8 pin SC70JW package
APPLICATIONS
D
D
D
D
D
D
Cellular telephones
Digital still cameras
Personal digital assistants (PDA)
Hot swap supplies
Notebook computers
Personal communication devices
DESCRIPTION
The SiP4280 is a P–channel MOSFET power switch designed
for high–side load switching applications. The output pass
transistor is a P–channel MOSFET transistor with typically 80
mΩ R
DS(ON)
. The SiP4280 is available in two different versions
of turn–on times. The SiP4280–1 version has a slew rate
limited turn–on time typically of 1 ms. The SiP4280–3 version
has a slew rate limited turn–on time typically of 100
ms
and
additionally offers a shutdown load discharge circuit to rapidly
turn off a load circuit when the switch is disabled.
Both SiP4280 load switch versions operate with an input
voltage ranging from 1.8 V to 5.5 V, making them ideal for both
3 V and 5 V applications. The SiP4280 also features an
under–voltage lock out which turns the switch off when an
input undervoltage condition exists. Input logic levels are TTL
and 2.5 volt to 5.0 volt CMOS compatible. The quiescent
supply current is very low, typically 2.5
mA.
In shutdown mode,
the supply current decreases to less than 1.0
mA.
The SiP4280 is available in a 8 pin SC70JW package and is
specified over –40
_C
to 85
_C
temperature range.
TYPICAL APPLICATION CIRCUIT
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
1
SiP4280
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Supply Input Voltage (V
IN
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
Enable Input Voltage (V
ON
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
Output Voltage (V
OUT
) . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
IN
+0.3 V
Maximum Switch Current (I
MAX
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 A
Maximum Pulsed Current (I
DM
) . . . . . . . . . . . . . . . . . . . . V
IN
w
2.5 V ..... 6 A
. . . . . . . . . . . . . . . . . . . . . V
IN
<
2.5 V ..... 3 A
Junction Temperature (T
J
) . . . . . . . . . . . . . . . . . . . . . . . . . . . –40
_C
to 150
_C
Thermal Resistance (q
JA
)
a
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
_C/W
Power Dissipation (P
D
)
b
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 714 mW
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.14 mW/_C above T
A
= 25
_C
RECOMMENDED OPERATING RANGE (ALL VOLTAGES REFERENCED TO GND = 0 V)
V
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 V to 5.5 V
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . –40
_C
to 85
_C
SPECIFICATIONS
Test Conditions Unless Specified
p
Parameter
SiP4280 All Versions
Operating Voltage
c
Undervoltage Lockout
Undervoltage Lockout Hysteresis
Quiescent Current
Off Supply Current
Off Switch Current
V
IN
V
UVLO
V
UVLO(hyh)
I
Q
I
Q(OFF)
I
SD(OFF)
ON/OFF = active
ON/OFF = inactive, OUT = open
ON/OFF = inactive, V
OUT
= 0
V
IN
= 5 V, T
A
= 25
_C
On–Resistance
On Resistance
R
DS(on)
V
IN
= 4.2 V, T
A
= 25
_C
V
IN
= 3 V, T
A
= 25
_C
V
IN
= 1.8 V, T
A
= 25
_C
On–Resistance Temp–Coefficient
ON/OFF Input Low
Voltage
d
TC
RDS
V
IL
V
IH
I
SINK
V
IN
= 2.7 V to 5.5 V
V
IN
= 2.7 V to
v
4.2 V
V
IN
=
u4.2
V to 5.5 V
V
ON/OFF
= 5.5 V
V
IN
Falling
1.8
1.0
–
–
–
–
–
–
–
–
–
–
2
2.4
–
–
1.4
250
2.5
0.01
0.01
80
85
100
160
2800
–
–
–
–
5.5
1.8
–
4
1
1
120
130
150
250
–
0.8
–
–
1
V
V
mV
mA
mA
mA
mΩ
mΩ
mΩ
mΩ
ppm/_C
V
V
V
mA
Limits
Min
a
Typ
b
Max
a
Units
Symbol
V
IN
= 5 V, T
A
= –40
_C
to 85
_C
ON/OFF Input High Voltage
ON/OFF Input Leakage
SiP4280–1 Version
Output Turn–On Delay Time
Output Turn–On Rise Time
Output Turn–Off Delay Time
T
D(ON)
T
ON
T
D(OFF)
V
IN
= 5 V, R
LOAD
= 10Ω, T
A
= 25
_C
V
IN
= 5 V, R
LOAD
= 10Ω, T
A
= 25
_C
V
IN
= 5 V, R
LOAD
= 10Ω, T
A
= 25
_C
–
–
–
20
1000
4
40
1500
10
ms
ms
ms
SiP4280–3 Version
Output Turn–On Delay Time
Output Turn–On Rise Time
Output Turn–Off Delay Time
Output Pull–Down Resistance
a.
b.
c.
d.
T
D(ON)
T
ON
T
D(OFF)
R
PD
V
IN
= 5 V, R
LOAD
= 10Ω, T
A
= 25
_C
V
IN
= 5 V, R
LOAD
= 10Ω, T
A
= 25
_C
V
IN
= 5 V, R
LOAD
= 10Ω, T
A
= 25
_C
ON/OFF = inactive, T
A
= 25
_C
–
–
–
–
20
100
4
150
40
150
10
250
ms
ms
ms
Ω
The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Part requires minimum start–up of V
IN
w
2.0 to ensure operation down to 1.8 V.
For V
IN
v
2.7 V see typical ON/OFF threshold curve.
www.vishay.com
2
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
SiP4280
Vishay Siliconix
PIN CONFIGURATION
PIN DESCRIPTION
Pin Number
SC70JW–8
1,5,6,7,8
3
4
2
Pin
Name
V
IN
ON/OFF
GND
OUT
Description
This pin is the P–channel MODFET source connection
Logic high enables the IC; logic low disables the IC and reduces the quiescent current to 2.5
mA
Ground connection
This pin is the P–channel MOSFET drain connection.
SELECTION GUIDE
Part Number
SiP4280–1–T1–E3
SiP4280–3–T1–E3
Slew Rate
(typ)
1 ms
100
ms
Active
Pull Down
No
Yes
Enable
Active High
Active High
ORDERING INFORMATION
Part Number
SiP4280DR–1–T1–E3
SiP4280DR–3–T1–E3
Notes:
XXX = Lot Code
Marking
L1XXX
Temperature Range
–40
_C
to 85
_C
40
Package
SC70JW–8
SC70JW–8
L3XXX
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
3
SiP4280
Vishay Siliconix
TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)
Quiescent Current vs. Temperature
4.0
3.5
Quiescent Current (mA)
3.0
2.5
I
Q
(mA)
2.0
1.5
1.0
0.5
0.0
–40
V
IN
= 3 V
V=5V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
–25
0
25
50
75
85
0
1
2
3
V
IN
(V)
4
5
6
Quiescent Current vs. Input Voltage
Temperature (_C)
R
DS(ON)
vs. Input Voltage
250
230
210
190
r
DS(ON)
(mW)
170
150
130
110
90
70
50
1.5
100 mA
80
70
60
–40
500 mA
2A
120
1A
r
DS(ON)
(mW)
110
140
130
R
DS(ON)
vs. Temperature
V=3V
V=5V
100
90
2.0
2.5
3.0
3.5
V
IN
(V)
4.0
4.5
5.0
5.5
–25
0
25
50
75
85
Temperature (_C)
ON/OFF Threshold vs. Input Voltage
2.2
2.0
1.8
ON/OFF Threshold (V)
1.6
1.4
1.2
V
IH
1.0
0.8
0.6
0.4
1.5
V
IL
IoffSW (mA)
1.0
0.8
0.6
0.4
0.2
0.0
2.0
2.5
3.0
3.5
V
IN
(V)
4.0
4.5
5.0
5.5
–40
1.6
1.4
1.2
Off Switch Current vs. Temperature
–25
0
25
50
75
100
85
Temperature (_C)
www.vishay.com
4
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
SiP4280
Vishay Siliconix
TYPICAL WAVEFORMS
SiP4280–1 Turn–On (V
IN
= 3 V, R
LOAD
= 6
W)
SiP4280–1 Turn–Off (V
IN
= 3 V, R
LOAD
= 6
W)
ON/OFF (5 V/div.)
ON/OFF (5 V/div.)
V
OUT
(2 V/div.)
V
OUT
(2 V/div.)
I
IN
(200 mA/div.)
I
IN
(200 mA/div.)
Time (500
ms/div)
Time (5
ms/div)
SiP4280–1 Turn–On (V
IN
= 5 V, R
LOAD
= 10
W)
ON/OFF (5 V/div.)
SiP4280–1 Turn–Off (V
IN
= 5 V, R
LOAD
= 10
W)
ON/OFF (5 V/div.)
V
OUT
(2 V/div.)
V
OUT
(2 V/div.)
I
IN
(200 mA/div.)
I
IN
(200 mA/div.)
Time (500
ms/div)
Time (5
ms/div)
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
5
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