SIPEX SP2525A

SP2525A
USB High-Side Power Switch
FEATURES
■ +3.0V to +5.5V Input Voltage Range
■ 500mA Continuous Load Current per
Channel
■ 2.6V Undervoltage Lockout
■ 1.25A Short Circuit Current Limit
■ 100mΩ Maximum On-Resistance
■ 75µA On-State Supply Current
■ 1µA Shutdown Current
■ Output can be Forced Higher than Input
(Off-State)
■ Thermal Shutdown
■ Slow Turn On and Fast Turn Off
EN 1
FLG 2
8 OUT
SP2525A
8 Pin NSOIC
GND 3
7 IN
6 OUT
5 IN
NC 4
Now Available in Lead Free Packaging
■ Active-High Version: SP2525A-1
■ Active-Low Version: SP2525A-2
APPLICATIONS
■ USB Power Management
■ Hot Plug-In Power Supplies
■ Battery Charger Circuit
DESCRIPTION
The SP2525A device is an integrated high-side power switch ideal for self-powered and buspowered Universal Serial Bus (USB) applications. The high-side switches are MOSFETs with
70mΩ RDS(ON), which meets USB voltage drop requirements for maximum transmission wire
length. Multi-purpose open-drain fault flag output indicates over-current limiting, thermal
shutdown, or undervoltage lockout. Output current is typically limited to 0.85A below the 5A
safety requirement, and the thermal shutdown function shuts the switch off to prevent damage
under overcurrent conditions. Guaranteed minimum output rise time limits inrush current
during hot plug-in, minimizing EMI and preventing the voltage at the upstream port from
dropping excessively.
TYPICAL APPLICATION CIRCUIT
VCC
5.0V
33µF
10K
4.50V TO 5.25V
UPSTREAM VBUS
100mA MAX
USB CONTROLLER
SPX1521
VBUS
D+
D-
FLG
D+
+
GND
GND
10µF
Cout
DATA
Ferrite Bead
IN
+
GND
VBUS
OUT
SP2525A
OVERCURRENT
+ 1µF
Cin
®
EN
ON/OFF
VIN
OUT
IN
33µF
OUT
NC
D-
0.01 µF
IN
GND
GND
Ferrite Bead
0.01 µF
DATA
33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
One Port Self Powered Hub
Date: 5/3/06 Rev I
SP2525A USB High-Side Power Switch
1
© Copyright 2006 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated
in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions
for extended periods of time may affect reliability.
Supply Voltage(VIN)..........................................7.0V
Fault Flag Voltage (VFLG)..................................7.0V
Fault Flag Current (IFLG)..................................50mA
Enable Input (VEN)...............................-0.3V to 15V
Operating Temperature Range.............-40˚C to +85˚C
Storage Temperature Range..............-65˚C to +150˚C
Power Dissipation Per Package
8-pin NSOIC
(derate 6.14mW/OC above +70OC)..................500mW
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VIN = +5.0V, TA = 25°C.
PARAMETER
MIN.
Supply Current
Enable Input Voltage
2.4
Enable Input Current
TYP.
MAX.
UNITS
0.75
75
5.0
100
µA
1.7
2.0
0.8
0.01
0.01
1
1
Enable Input Capacitance
1
Output Mosfet Resistance
70
Output Turn-On Delay
100
CONDITIONS
V EN = Logic "0" OUT = Open
V EN = Logic "1" OUT = Open
V
V EN = Logic "0"
V EN = Logic "1"
µA
V EN = Logic "0"
V EN = Logic "1"
pF
100
mΩ
µs
RL=10Ω each output
1000
4000
µs
RL=10Ω each output
Output Turn-Off Delay
0.8
20
µs
RL=10Ω each output
Output Turn-Off Fall Time
0.7
20
µs
RL=10Ω each output
10
µA
Output Turn-On Rise Time
Output Leakage Current
Current Limit Threshold
0.6
1.0
1.25
A
C
O
TJ increasing
TJ decreasing
Over-Temperature Shutdown
Threshold
135
125
Error Flag Output Resistance
10
15
25
40
Ω
V IN = 5V,IL = 10mA
V IN = 3.3V,IL = 10mA
Error Flag Off Current
0.01
1
µA
V FLAG = 5V
UVLO Threshold
2.6
2.4
Date: 5/3/06 Rev I
V
V IN increasing
V IN decreasing
SP2525A USB High-Side Power Switch
2
© Copyright 2006 Sipex Corporation
PIN DESCRIPTION
Pin Number
Pin Name
Description
1
EN
Enable Input Active High for SP2525A-1 and Active Low for SP2525A-2.
2
FLG
An active-low and open-drained fault flag output for power switch. It can
indicate current limit if CTL is active. In normal mode operation, it also can
indicate thermal shutdown or undervoltage.
3
GND
Chip power ground.
4
NC
Not internally connected.
5, 7
IN
Power supply input.
6, 8
OUT
MOSFET switch output.
TEST CIRCUIT
10K
VCC
+5V
®
SP2525A
ON
OUT
EN
OFF
FLG
IN
10Ω
GND
OUT
NC
IN
0.1µF
BLOCK DIAGRAM
OUT
Driver
EN
Current
Limit
Charge
Pump
Thermal
Shutdown
UVLO
CS
Power N-MOSFET
FLG
IN
GND
Date: 5/3/06 Rev I
SP2525A USB High-Side Power Switch
3
© Copyright 2006 Sipex Corporation
APPLICATION INFORMATION
Error Flag
Transient Requirements
The Error Flag is an open-drained output of
an N-channel MOSFET, the FLG output is
pulled low to signal the following fault conditions: input undervoltage, output current
limit, and thermal shutdown.
USB supports dynamic attachment (hot plugin) of peripherals. A current surge is caused
by the input capacitance of a downstream
device. Ferrite beads are recommended in
series with all power and ground connector
pins. Ferrite beads reduce EMI and limit the
inrush current during hot-attachment by filtering high-frequency signals.
Current Limit
The current limit threshold is preset internally. It protects the output MOSFET
switches from damage resulting from undesirable short circuit conditions or excess
inrush current, which is often encountered
during hot plug-in. The low limit of the
current limit threshold of the SP2525A allows a minimum current of 0.5A through the
MOSFET switches. A current limit condition will signal the Error Flag.
Short Circuit Transient
Bulk capacitance provides the short-term
transient current needed during a hot-attachment event. A 33 µF/16V tantalum or a 100µF/
10V electrolytic capacitor mounted close to
the downstream connector at each port should
provide sufficient transient drop protection.
Printed Circuit Layout
Thermal Shutdown
The Power circuitry of USB printed circuit
boards requires a customized layout to maximize thermal dissipation and to minimize
voltage drop and EMI.
When the temperature of the SP2525A
exceeds 135ºC for any reasons, the thermal shutdown function turns off the
MOSFET switch and signals the Error Flag.
A hysteresis of 10ºC prevents the MOSFETs
from turning back on until the chip temperature drops below 125ºC.
Input and Output
The independent solid state switch connects
the IN pin to the OUT pin when enabled by a
logic signal at EN. The IN pin is the power
supply connection to the internal circuitry and
the drain of the output MOSFET. The OUT
pin is the source for the MOSFET. Typically,
the current in USB application will flow through
the switch from IN to OUT towards the load.
If VOUT is greater than VIN when a switch is
enabled, the current will flow from OUT to the
IN pin because the MOSFET channels are
bidirectional when switched on. The output
source is allowed to be externally forced to a
higher voltage than its input without causing
unwanted current flow when the output is
disabled.
Supply Filtering
A 0.1µF to 1µF bypass capacitor from IN to
GND, located near the device, is strongly
recommended to control supply transients.
Without a bypass capacitor, an output short
may cause ringing on the input (from supply lead inductance) which can damage
internal control circuitry.
Date: 5/3/06 Rev I
SP2525A USB High-Side Power Switch
4
© Copyright 2006 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +5.0V, TAMB = +25OC unless otherwise noted.
On-Resistance vs. Temperature
Output On-Resistance vs. Supply Voltage
90
70
69
ON Resistance (mΩ)
Switch-ON Resistance (mΩ)
80
68
67
70
66
60
65
50
64
2
3
4
5
6
-60
7
-40
-20
0
20
Output On-Resistance vs. Supply Voltage
60
80
100
120
Output On-Resistance vs. Temperature
ON-State Supply Current vs. Supply Voltage
UVLO Threshold Voltage vs. Temperature
100
2.8
2.7
90
Switch-ON Supply Current (µA)
Rising
UVLO Threshold Voltage (V)
40
Temperature (°C)
Supply Voltage (V)
2.6
2.5
2.4
Falling
80
70
60
2.3
2.2
50
-40
-20
0
20
40
60
80
100
120
2
3
4
Temperature (ºC)
UVLO Threshold Voltage vs. Temperature
6
7
8
On-state Supply Current vs. Supply Voltage
OFF State Supply Current vs. Supply Voltage
ON-State Supply Current vs. Supply Voltage
100
0.10
90
0.08
Supply Current (µA)
Switch-ON Supply Current (µA)
5
Supply Voltage (V)
80
70
60
0.06
0.04
0.02
50
0.00
2
3
4
5
6
7
8
3
4
Supply Voltage (V)
On-state Supply Current vs. Temperature
Date: 5/3/06 Rev I
5
6
7
8
Supply Voltage (V)
Off-state Supply Current vs. Supply Voltage
SP2525A USB High-Side Power Switch
5
© Copyright 2006 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +5.0V, TAMB = +25OC unless otherwise noted.
CTL Threshold Voltage vs. Supply Voltage
Current Limit Threshold vs. Temperature
2.80
1.15
2.60
1.10
2.40
1.05
2.00
Output Threshold (A)
Threshold Voltage (V)
2.20
CTL Rising
1.80
1.60
CTL Falling
1.40
1.00
0.95
0.90
0.85
1.20
0.80
1.00
0.75
0.80
2
3
4
5
6
-60
7
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
Supply Voltage (V)
Current Limit Threshold vs. Temperature
Control Threshold vs. Supply Voltage
Output Rise Time vs. Temperature
0.54
1.35
0.52
0.50
1.30
Turn-off Fall Time (µS)
Turn-ON Resistance (mS)
Output Fall Time vs. Temperature
1.40
1.25
1.20
0.48
0.46
0.44
1.15
0.42
1.10
0.40
1.05
-40
0.38
-20
0
20
40
60
80
100
120
-40
-20
Temperature (°C)
0
20
40
60
80
Output Rise Time vs. Temperature
120
Output Fall Time vs. Temperature
V EN
V IN
V OUT
V FLG
VEN=GND
R L=35Ω
C L=15uF
RL=35Ω
CL=15uF
V OUT
V FLG
I OUT
100mA/div
I OUT
200mA/div
Turn-On, Turn-Off
Characteristics
Input Voltage
Response
Date: 5/3/06 Rev I
100
Temperature (°C)
SP2525A USB High-Side Power Switch
6
© Copyright 2006 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +5.0V, TAMB = +25OC unless otherwise noted.
V EN
V EN
V FLG
V FLG
RL=35Ω
CL=33uF
R L=35Ω
C L=150uF
V OUT
V OUT
I OUT
100mA/div
I OUT
100mA/div
Turn-On, Turn-Off
Characteristics
Turn-On, Turn-Off
Characteristics
V EN
V FLG
V FLG
V OUT
V OUT
I OUT
5A/div
Short Circuit Response
(Short Applied to Output)
I OUT
1A/div
Short Circuit Response
(Enable to Short Circuit)
VFLG
VOUT
V OUT
V FLG
I OUT
5A/div
IOUT
1A/div
Short Circuit Transient Response
(Short Applied to Output)
Date: 5/3/06 Rev I
Current Limit Response
(Ramped Load)
SP2525A USB High-Side Power Switch
7
© Copyright 2006 Sipex Corporation
PACKAGE: 8 Pin NSOIC
D
D/2
SIDE VIEW
7
8
5
6
E1/2
A1
Seating Plane
E
E1
2
1
Pin1 Designator
to be within this
INDEX AREA
(D/2 x E1/2)
A2
A
E/2
4
3
(L1)
e
b
TOP VIEW
ø1
h
FRONT VIEW
ø2
h
R1
Gauge Plane
R
L2
ø
8 Pin NSOIC
SYMBOL
A
A1
A2
b
c
E
E1
e
h
L
L1
L2
R
R1
ø
ø1
ø2
D
Seating
Plane
L
Variation AA
Dimensions in Inches
Conversion Factor:
1 Inch = 25.40 mm
Dimensions in Millimeters:
Controlling Dimension
MIN
NOM
MAX
MIN
1.35
0.10
1.25
0.31
0.17
6.00 BSC
3.90 BSC
1.27 BSC
1.75
0.25
1.65
0.51
0.25
0.053
0.004
0.049
0.012
0.007
0.50
1.27
0.010
0.016
8º
15º
-
0.003
0.003
0º
5º
0º
0.25
0.40
c
JEDEC MS-012
1.04 REF
0.25 BSC
0.07
0.07
0º
5º
0º
4.90 BSC
SIPEX Pkg Signoff Date/Rev:
Date: 5/3/06 Rev I
ø1
NOM
SP2525A USB High-Side Power Switch
8
MAX
0.069
0.010
0.065
0.020
0.010
0.236 BSC
0.154 BSC
0.050 BSC
0.020
0.050
0.041 REF
0.010 BSC
8º
15º
0.193 BSC
JL Aug16-05 / Rev A
© Copyright 2006 Sipex Corporation
ORDERING INFORMATION
Part Number
Temperature Range
Package Types
SP2525A-1EN ................................................. -40°C to +85°C ................................................... 8-pin NSOIC
SP2525A-1EN/TR ........................................... -40°C to +85°C .................................................. 8-pin NSOIC
SP2525A-2EN ................................................. -40°C to +85°C ................................................... 8-pin NSOIC
SP2525A-2EN/TR ........................................... -40°C to +85°C .................................................. 8-pin NSOIC
Available in lead free packaging. To order add “-L” suffix to part number.
Example: SP2525A-1EN/TR = standard; SP2525A-1EN-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 2,500 for 8 pin NSOIC.
Solved by Sipex
TM
Sipex Corporation
Headquarters and Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 5/3/06 Rev I
SP2525A USB High-Side Power Switch
9
© Copyright 2006 Sipex Corporation