AIC AIC1525-1CN Usb high-side power switch Datasheet

AIC1525
USB High-Side Power Switch
n FEATURES
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n DESCRIPTION
70mΩ (5V Input) High-Side MOSFET Switch.
500mA Continuous Load Current per Channel.
75µA Typical On-State Supply Current.
1µA Typical Off-State Supply Current.
Current-Limit / Short Circuit Protection.
Thermal Shutdown Protection under Overcurrent
Condition.
Undervoltage Lockout Ensures that Switch is off at
Start Up.
Output can be Forced Higher than Input (Off-State).
Open-Drain Fault Flag.
Slow Turn ON and Fast Turn OFF.
Enable Active-High or Active-Low.
The AIC1525 is an integrated high-side power
switch for self-powered and bus-powered Universal
Serial Bus (USB) applications. The high-side
switch is a MOSFET 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 thermal shutdown function shuts the switch
off to prevent damage under overcurrent condition.
n APPLICATIONS
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
• USB Power Management.
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Hot Plug-In Power Supplies.
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Battery-Charger Circuit.
n TYPICAL APPLICATION
CIRCUIT
VCC
5.0V
33µ F
10K
4.50 V to 5.25V
Upstream VBUS
100mA max
AI C17 2 2
VBUS
IN
D+
+ µ
1 F
C IN
DGND
VIN
OUT
+
10 µF
C OUT
GND
Ferrite
Bead
USB Controll er
ON/OFF
CTL
OUT
OVERCURRENT
FLG
GND
NC
IN
GND
DATA
*
33µ F
OUT
IN
AIC1525
33 µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high- current traces
VBUS
D+
+
0.01µ F
D-
*
GND
0.1 µF
DATA
One-Port Self-Powered Hub
Analog Integrations Corporation
www.analog.com.tw
DS-1525-00
May 16, 00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
1
AIC1525
n ORDERING INFORMATION
ORDER NUMBER
AIC1525-XXX
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TOP VIEW
AIC1525-0CN
AIC1525-1CN
(PLASTIC DIP)
TEMPERATURE RANGE
C: 0° C~70°C
CONTROL POLARITY
0: ACTIVE LOW
1: ACTIVE HIGH
PIN CONFIGURATION
AIC1525-0CS
AIC1525-1CS
(PLASTIC SO)
CTL
1
8 OUT
FLG
2
7 IN
GND
3
6 OUT
NC
4
5 IN
n ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V IN)
.......................................................… … … … .......… … ........... 7.0V
Fault Flag Voltage (V FLG) ........................................................… … … … … … ..… … ...... 7.0V
Fault Flag Current (IFLG)
...................… … … .....................… … … ...............… ........ 50mA
Control Input (V CTL) ......................................................… … … … … ....… … ..… . -0.3V ~15V
Operating Temperature Range
..............… … … … ..… … … … … .… ............... -20°C~80°C
Storage Temperature Range
....................................… … … .................. -65°C ~ 150°C
n TEST CIRCUIT
10K
VCC
+5V
ON
CTL
OFF
OUT
FLG
IN
GND
OUT
IN
NC
10Ω
0.1µF
AIC1525
2
AIC1525
n ELECTRICAL CHARACTERISTICS (V
IN=
5V, Ta=25°C, unless otherwise
specified.)
PARAMETERS
Supply Current
Control Input Voltage
CONDITIONS
TYP.
MAX.
UNIT
VCTL =Logic “0” , OUT=Open
0.75
5
µA
VCTL =Logic “1” , OUT=Open
75
100
VCTL =Logic “0”
1.7
0.8
VCTL =Logic “1”
Control Input Current
MIN.
2.4
VCTL =Logic “0”
0.01
1
VCTL =Logic “1”
0.01
1
Control Input Capacitance
1
Output MOSFET Resistance
V
2.0
70
µA
pF
100
mΩ
µS
Output Turn-On Rise Delay
RL = 10Ω each Output
100
Output Turn-On Rise Time
RL = 10Ω each Output
1000
4000
µS
Output Turn-Off Delay
RL = 10Ω each Output
0.8
20
µS
Output Turn-Off Fall Time
RL = 10Ω each Output
0.7
20
µS
10
µA
1.25
A
Output Leakage Current
Current Limit Threshold
0.7
1.0
Overtemperature Shutdown
TJ Increasing
135
Threshold
TJ Decreasing
125
VIN = 5V , IL =10 mA
10
25
VIN = 3.3V , IL =10mA
15
40
VFLG = 5V
0.01
1
VIN Increasing
2.6
VIN Decreasing
2.4
Error Flag Output Resistance
Error Flag Off Current
UVLO Threshold
°C
Ω
µA
V
3
AIC1525
n BLOCK DIAGRAM
OUT
DRIVER
CTL
CURRENT
LIMIT
CHARGE PUMP
THERMAL
SHUTDOWN
GND
n TYPICAL
CS
POWER N-MOSFET
FLG
UVLO
IN
PERFORMANCE CHARACTERISTICS
Output ON Resistance vs. Supply Voltage
69
68
67
66
65
64
2
3
4
5
Supply Voltage (V)
6
7
On-Resistance vs. Temperature
90
ON Resistance (mΩ )
Switch-ON Resistance (mΩ)
70
80
70
60
50
-60
-40
-20
0
20
40
Temperature (° C)
60
80
100
120
4
AIC1525
ON-State Supply Current vs. Supply Voltage
UVLO Threshold Voltage vs. Temperature
100
UVLO Threshold Voltage (V)
Switch-ON Supply Current (µA)
2.8
90
80
70
60
50
2.7
rising
2.6
2.5
2.4
falling
2.3
2.2
2
3
4
5
6
7
-40
-20
0
Supply Voltage (V)
n TYPICAL
20
40
60
Temperature (°C)
80
100
120
PERFORMANCE CHARACTERISTICS (Continued)
OFF-State Supply Current vs. Temperature
ON-State Supply Current vs. Temperature
95
1
10
Supply Current (µA)
Supply Current (µA)
90
85
80
75
70
2
10
3
10
65
60
-40
-20
0
20
40
60
Temperature (° C)
80
100
4
10
120
-40
OFF State Current vs. Supply Voltage
-20
0
20
40
60
Temperature (°C)
80
100
120
CTL Threshold Voltage vs. Supply Voltage
0.10
2.8
2.6
2.4
Threshold voltage (V)
Supply current (µA)
0.08
0.06
0.04
0.02
2.2
CTL rising
2.0
1.8
CTL falling
1.6
1.4
1.2
1.0
0.8
0
3
4
5
6
Supply Voltage (V)
7
8
2
3
4
5
6
7
Supply Voltage (V)
5
AIC1525
Output fall Time vs. Temperature
1.40
0.54
1.35
0.52
Turn-Off Fall Time (µS)
Turn-ON Resistance (mS)
Output Rise Time vs. Temperature
1.30
1.25
1.20
1.15
1.10
0.50
0.48
0.46
0.44
0.42
0.40
1.05
-40
-20
0
20
40
60
Temperature (°C)
80
100
120
0.38
-40
-20
0
20
40
60
Temperature (° C)
80
100
120
6
AIC1525
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Current Limit Threshold vs. Temperature
1.15
Output Threshold (A)
1.00
0.95
Current Limit Threshold
0.90
Short Circuit Current Limit
0.85
-60
-40
-20
0
20
40
60
Temperature (°C)
80
100
120
140
Current Limit Response
Short Circuit Response
FLG
0.8A
FLG
Thermal Shutdown
IOUT
IOUT
1A/10mV
1A/10mV
Turn-On/Off Characteristic ( I )
Turn On/Off Characteristic (II)
CTL
VOUT
IOUT
OUT
1A/10mV
R=10Ω
RL=35Ω
CL=100 µF
7
AIC1525
n PIN DESCRIPTION
PIN 1: CTL
PIN 2: FLG
- TTL compatible control input. It
controls the power switch turnon/turn-off.
Active High for
AIC1525-1 and active low for
AIC1525-0.
- An active-low and open-drain 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.
PIN 3: GND
- Chip power ground.
PIN 4: NC
- Not internally connected.
PIN 5, 7: IN
- Power supply Input.
PIN 6, 8: OUT - MOSFET switch output.
n APPLICATION INFORMATIONS
l Error Flag
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.
control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance) to
damage internal control circuitry.
l Transient Droop Requirements
l Current Limit
The current limit threshold is preset internally. It
protects the output MOSFET switches from damage
due to undesirable short circuit conditions or excess
inrush current often encountered during hot plug-in.
The low limit of the current limit threshold of the
AIC1525 allows a minimum current of 0.5A through
the MOSFET switches. A current limit condition will
signal the error flag.
l Thermal Shutdown
When the chip temperature exceeds 135°C, the
thermal shutdown function turns off MOSFET switch
and signals the error flag. A hysteresis of 10°C
prevents the MOSFET from turning back on until the
chip temperature drops to below 125°C.
l Supply Filtering
A 0.1µF to 1µF bypass capacitor from IN to GND,
located near the device, is strongly recommended to
USB support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of 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.
l Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event. With
a 33µF, 16V tantalum or 100µF, 10V electrolytic
capacitor mounted close to downstream connector
should provide transient drop protection.
l Printed Circuit Layout
The power circuitry of USB printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
8
AIC1525
VCC
5.0V
33uF
10K
4.50 V to 5.25V
Upstream VBUS
100mA max
AIC1722
VBUS
IN
D+
+ µ
1 F
C IN
D-
VIN
OUT
+
10 µF
C OUT
GND
GND
Ferrite
Bead
USB Controll er
ON/OFF
CTL
OUT
OVERCURRENT
FLG
GND
NC
IN
GND
DATA
33µ F
OUT
IN
AIC1525
0.01µ F
D-
*
GND
0.1 µF
33 µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high- current traces
*
VBUS
D+
+
DATA
One-Port Self-Powered Hub
n PHYSICAL DIMENSIONS
8 LEAD PLASTIC SO (unit: mm)
D
H
SYMBOL
MIN
MAX
A
1.35
1.75
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
5.00
E
3.80
4.00
E
e
A
e
C
A1
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B
L
1.27(TYP)
H
5.80
6.20
L
0.40
1.27
9
AIC1525
l
8 LEAD PLASTIC DIP (unit: mm)
D
E1
E
A2
A1
eB
e
MIN
MAX
A1
0.381
—
A2
2.92
4.96
b
0.35
0.56
C
0.20
0.36
D
9.01
10.16
E
7.62
8.26
E1
6.09
7.12
C
L
b
SYMBOL
e
2.54 (TYP)
eB
—
10.92
L
2.92
3.81
10
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