SIP4280 [VISHAY]
Slew Rate Controlled Load Switch; 压摆率受控负载开关
| 型号： | SIP4280 |
| 厂家： | 
VISHAY |
| 描述： | Slew Rate Controlled Load Switch |
| 文件： | 总9页 (文件大小：307K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SiP4280
Vishay Siliconix
Slew Rate Controlled Load Switch
FEATURES
APPLICATIONS
D 1.8 V to 5.5 V Input Voltage range
D Very Low RDS(ON), typically 80 m (5 V)
D Slew rate limited turn–on time options
D SiP4280–1: 1 ms
D Cellular telephones
D Digital still cameras
D Personal digital assistants (PDA)
D Hot swap supplies
D SiP4280–3: 100 ꢀs
D Notebook computers
D Fast shutdown load discharge option
D Low quiescent current
D Personal communication devices
D 4 kV ESD Rating
D 8 pin SC70JW package
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 RDS(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 ꢀs and
additionally offers a shutdown load discharge circuit to rapidly
turn off a load circuit when the switch is disabled.
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 ꢀ A. In shutdown mode,
the supply current decreases to less than 1.0 ꢀ A.
The SiP4280 is available in a 8 pin SC70JW package and is
specified over –40 _C to 85 _C temperature range.
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
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 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
IN
Enable Input Voltage (V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
ON
Junction Temperature (T ) . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 _C to 150 _C
J
a
Thermal Resistance (
ꢁ
)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 _C/W
JA
b
Output Voltage (V
) . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V +0.3 V
IN
OUT
Power Dissipation (P ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 714 mW
D
Maximum Switch Current (I
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 A
MAX
Notes
Maximum Pulsed Current (I
)
. . . . . . . . . . . . . . . . . . . . V ꢀ 2.5 V ..... 6 A
DM
IN
a. Device mounted with all leads soldered or welded to PC board.
. . . . . . . . . . . . . . . . . . . . . V < 2.5 V ..... 3 A
IN
b. Derate 7.14 mW/_C above T = 25 _C
A
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
Limits
Typb
Test Conditions Unless Specified
Parameter
Symbol
Mina
Maxa
Units
V
IN
= 5 V, T = –40 _C to 85 _C
A
SiP4280 All Versions
c
Operating Voltage
V
1.8
1.0
–
–
5.5
1.8
–
V
V
IN
Undervoltage Lockout
V
V
IN
Falling
1.4
250
UVLO
UVLO(hyh)
Undervoltage Lockout Hysteresis
V
mV
Quiescent Current
Off Supply Current
I
ON/OFF = active
ON/OFF = inactive, OUT = open
ON/OFF = inactive, V = 0
–
–
2.5
4
1
ꢀ A
ꢀ A
Q
I
0.01
Q(OFF)
Off Switch Current
I
–
–
0.01
80
85
100
160
2800
–
1
120
130
150
250
–
ꢀ A
mΩ
mΩ
mΩ
mΩ
ppm/_C
V
SD(OFF)
OUT
V
= 5 V, T = 25 _C
IN
A
V
IN
= 4.2 V, T = 25 _C
–
A
On–Resistance
R
DS(on)
V
IN
= 3 V, T = 25 _C
–
A
V
IN
= 1.8 V, T = 25 _C
–
A
On–Resistance Temp–Coefficient
TC
–
RDS
d
ON/OFF Input Low Voltage
V
V
IN
= 2.7 V to 5.5 V
–
0.8
–
IL
V
= 2.7 V to ꢁ 4.2 V
IN
2
–
V
IN
ON/OFF Input High Voltage
V
IH
V
=
ꢂ
4
.
2
V
t
o
5
.
5
V
2.4
–
–
–
V
ON/OFF Input Leakage
I
V
= 5.5 V
–
1
ꢀ
A
SINK
ON/OFF
SiP4280–1 Version
Output Turn–On Delay Time
Output Turn–On Rise Time
Output Turn–Off Delay Time
T
V
IN
V
IN
V
IN
= 5 V, R
= 5 V, R
= 5 V, R
= 10Ω, T = 25 _C
–
–
–
20
1000
4
40
1500
10
ꢀ s
ꢀ s
ꢀ s
D(ON)
LOAD
LOAD
LOAD
A
T
= 10Ω, T = 25 _C
ON
A
T
= 10Ω, T = 25 _C
D(OFF)
A
SiP4280–3 Version
Output Turn–On Delay Time
Output Turn–On Rise Time
Output Turn–Off Delay Time
Output Pull–Down Resistance
T
V
IN
V
IN
V
IN
= 5 V, R
= 5 V, R
= 5 V, R
= 10Ω, T = 25 _C
–
–
–
–
20
100
4
40
150
10
ꢀ s
ꢀ s
ꢀ s
Ω
D(ON)
LOAD
LOAD
LOAD
A
T
= 10Ω, T = 25 _C
ON
A
T
= 10Ω, T = 25 _C
D(OFF)
A
R
ON/OFF = inactive, T = 25 _C
150
250
PD
A
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
c. Part requires minimum start–up of V ꢀ 2.0 to ensure operation down to 1.8 V.
IN
d. For V ꢁ 2.7 V see typical ON/OFF threshold curve.
IN
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
2
SiP4280
Vishay Siliconix
PIN CONFIGURATION
PIN DESCRIPTION
Pin Number
SC70JW–8
Pin
Description
Name
1,5,6,7,8
V
IN
This pin is the P–channel MODFET source connection
3
4
2
ON/OFF
GND
Logic high enables the IC; logic low disables the IC and reduces the quiescent current to 2.5 ꢀ A
Ground connection
OUT
This pin is the P–channel MOSFET drain connection.
SELECTION GUIDE
Part Number
Slew Rate
(typ)
Active
Pull Down
No
Enable
1 ms
Active High
Active High
SiP4280–1–T1–E3
SiP4280–3–T1–E3
100 ꢀ s
Yes
ORDERING INFORMATION
Part Number
Marking
L1XXX
Temperature Range
Package
SC70JW–8
SC70JW–8
SiP4280DR–1–T1–E3
–40 C to 85 C
L3XXX
SiP4280DR–3–T1–E3
Notes:
XXX = Lot Code
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
Quiescent Current vs. Input Voltage
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
V = 5 V
V
IN
= 3 V
–40
–25
0
25
50
0
1
2
3
4
5
6
75
85
5.5
5.5
V
(V)
IN
Temperature (_C)
R
vs. Input Voltage
R
vs. Temperature
DS(ON)
DS(ON)
250
230
210
190
170
150
130
110
90
140
130
120
110
100
90
2 A
1 A
V = 3 V
V = 5 V
500 mA
80
100 mA
70
70
50
1.5
60
–40
–25
0
25
50
2.0
2.5
3.0
3.5
(V)
4.0
4.5
5.0
75
85
V
Temperature (_C)
IN
ON/OFF Threshold vs. Input Voltage
Off Switch Current vs. Temperature
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
V
IH
V
IL
100
1.5
2.0
2.5
3.0
3.5
(V)
4.0
4.5
5.0
–40
–25
0
25
50
75
V
Temperature (_C)
IN
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
4
SiP4280
Vishay Siliconix
TYPICAL WAVEFORMS
SiP4280–1Turn–On (V = 3 V, R
= 6 W)
SiP4280–1 Turn–Off (V = 3 V, R
= 6 W)
IN
LOAD
IN
LOAD
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 ꢀ s/div)
Time (5 ꢀ s/div)
SiP4280–1 Turn–On (V = 5 V, R
= 10 W)
SiP4280–1 Turn–Off (V = 5 V, R
= 10 W)
IN
LOAD
IN
LOAD
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 ꢀ s/div)
Time (5 ꢀ s/div)
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
5
SiP4280
Vishay Siliconix
TYPICAL WAVEFORMS
SiP4280–3Turn–On (V = 3 V, R
= 6 W)
SiP4280–3 Turn–Off (V = 3 V, R
= 6 W)
IN
LOAD
IN
LOAD
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 (50 ꢀ s/div)
Time (5 ꢀ s/div)
SiP4280–3 Turn–On (V = 5 V, R
= 10 W)
SiP4280–3 Turn–Off (V = 5 V, R
= 10 W)
IN
LOAD
IN
LOAD
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 (5 ꢀ s/div)
Time (50 ꢀ s/div)
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
6
SiP4280
Vishay Siliconix
BLOCK DIAGRAM
SiP4280–3 Version only
SiP4280 Functional Block Diagramm
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
7
SiP4280
Vishay Siliconix
DETAILED DESCRIPTION
The SiP4280 is a P–channel MOSFET power switches
designed for high–side slew rate controlled load–switching
applications. During turn on, the current ramps linearly until it
reaches the level required for the output load condition. This is
achieved by first applying the threshold voltage on the gate of
the MOSFET. Once at this level, the current begins to slew and
the gate voltage is then linearly increased until the MOSFET
becomes fully enhanced. Once fully enhanced, the gate is
quickly increased to the full input voltage and RDS(ON) is
minimized.
at all. The SIP4280–3 has in addition to the 100 ꢀs minimized
slew rate limited turn on function, a shutdown output discharge
circuit to rapidly turn off a load when the load switch is disabled
through the ON/OFF pin.
Both versions of the SiP4280 operate with input voltages
ranging from 1.8 V to 5.5 V. Also, both versions of this device
have extremely low operating current, making them ideal for
battery–powered applications. In cases where the input
voltage drops below 1.8 V, the under voltage lockout function
will prevent the P–channel MOSFET device from entering into
the saturation region of operation by automatically shutting
down SiP4280. The ON/OFF control pin is TTL compatible and
will also function with 2.5 volt to 5 volt CMOS logic systems.
The SiP4280–1 version has a moderate 1ms turn on slew rate
feature, which reduces in–rush current when the MOSFET is
turned on. This function allows the load switch to be
implemented with a small input capacitor, or no input capacitor
APPLICATION INFORMATION
Input Capacitor
Enable
While a bypass capacitor on the input is not required, a 1 ꢀF
or larger capacitor for CIN is recommended in almost all ap–
plications. The Bypass capacitor should be placed as phy–
sically close as possible to the SiP4280 to be effective in
minimizing transients on the input. Ceramic capacitors are
recommended over tantalum because of their ability to
withstand input current surges from low impedance sources
such as batteries in portable devices.
The ON/OFF pin is compatible with both TTL and CMOS logic
voltage levels.
Reverse Voltage Conditions and Protection
The P–channel MOSFET pass transistor has an intrinsic diode
that is reversed biased when the input voltage is greater than
the output voltage. Should VOUT exceed VIN , this intrinsic
diode will become forward biased and allow excessive current
to flow into the IC thru the VOUT pin and potentially damage the
IC device. Therefore extreme care should be taken to prevent
VOUT from exceeding VIN.
Output Capacitor
A 0.1 ꢀF capacitor or larger across VOUT and GND is recom–
mended to insure proper slew operation. COUT may be
increased without limit to accommodate any load transient
condition with only minimal affect on the SiP4280 turn on slew
rate time. There are no ESR or capacitor type requirement.
In conditions where VOUT exceeds VIN a Schottky diode in
parallel with the internal intrinsic diode is recommended to
protect the SiP4280.
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and
Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see
http://www.vishay.com/ppg?73476.
Document Number: 73476
S–52468—Rev. B, 28-Nov-05
www.vishay.com
8
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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