AIC1525
USB High-Side Power Switch
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1525-00 May 16, 00TEL: 886-3-5772500 FAX: 886-3-5772510 1
n FEATURES
l 70mΩ (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current per Channel.
l 75µA Typical On-State Supply Current.
l 1µA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Shutdown Protection under Overcurrent
Condition.
l Undervoltage Lockout Ensures that Switch is off at
Start Up.
l Output can be Forced Higher than Input (Off-State).
l Open-Drain Fault Flag.
l Slow Turn ON and Fast Turn OFF.
l Enable Active-High or Active-Low.
n APPLICATIONS
•USB Power Management.
l Hot Plug-In Power Supplies.
l Battery-Charger Circuit.
n TYPICAL APPLICATION
CIRCUIT
n DESCRIPTION
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.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
Ferrite
Bead
0.01
µ
F33
µ
F
*
0.1
µ
F
33
µ
F
5.0V
VCC
+
DATA
D+
D-
GND
VBUS
OVERCURRENT
10K
UU
SS
B
B
CC
oo
nn
tt
rr
oo
ll
l
l
ee
r
r
GND
VIN ON/OFF
4.50V to 5.25V
Upstream VBUS
100mA max
DATA
A
A
I
I
C
C
1
1
7
7
2
2
2
2
OUTIN
GND
+
1
µ
F
CIN 10
µ
F
COUT
+
*33
µ
F, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high- current traces
IN
OUT
OUT
CTL
FLG
GND
NC IN
AIC1525
D+
D-
GND
VBUS
One-Port Self-Powered Hub
AIC1525
2
n ORDERING INFORMATION
ORDER NUMBER
AIC1525-0CN
AIC1525-1CN
(PLASTIC DIP)
PIN CONFIGURATION
TOP VIEW
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C: 0°C~70°C
CONTROL POLARITY
0: ACTIVE LOW
1: ACTIVE HIGH
AIC152
5
-XXX
AIC1525-0CS
AIC1525-1CS
(PLASTIC SO)
OUT
OUT
IN
IN
GND
FLG
NC
CTL 1
3
4
2
8
6
5
7
n ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VIN).......................................................………….......……........... 7.0V
Fault Flag Voltage (VFLG) ........................................................………………..……...... 7.0V
Fault Flag Current (IFLG)...................……….....................………...............…........ 50mA
Control Input (VCTL) ......................................................……………....……..…. -0.3V ~15V
Operating Temperature Range ..............…………..…………….…............... -20°C~80°C
Storage Temperature Range ....................................……….................. -65°C ~ 150°C
n TEST CIRCUIT
CTL
VCC
+5V
10Ω
0.1µF
OFF
ON
10K
AIC1525
OUT
FLG
GND
IN
IN
NC
OUT
AIC1525
3
n ELECTRICAL CHARACTERISTICS (VIN= 5V, Ta=25°C, unless otherwise
specified.)
PARAMETERS
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply Current VCTL =Logic “0” , OUT=Open
VCTL =Logic “1” , OUT=Open
0.75
75
5
100 µA
Control Input Voltage VCTL =Logic “0”
VCTL =Logic “1”
2.4
1.7
2.0
0.8 V
Control Input Current VCTL =Logic “0”
VCTL =Logic “1” 0.01
0.01
1
1 µA
Control Input Capacitance 1 pF
Output MOSFET Resistance 70 100 mΩ
Output Turn-On Rise Delay RL = 10Ω each Output 100 µS
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
Output Leakage Current 10 µA
Current Limit Threshold 0.7 1.0 1.25 A
Overtemperature Shutdown
Threshold
TJ Increasing
TJ Decreasing
135
125
°C
Error Flag Output Resistance VIN = 5V , IL =10 mA
VIN = 3.3V , IL =10mA
10
15
25
40 Ω
Error Flag Off Current VFLG = 5V 0.01 1 µA
UVLO Threshold VIN Increasing
VIN Decreasing
2.6
2.4
V
AIC1525
4
n BLOCK DIAGRAM
FLG
CTL
OUT
CHARGE PUMP
THERMAL
SHUTDOWN
DRIVER
UVLO IN
CURRENT
LIMIT
POWER N-MOSFET
CS
GND
n TYPICAL PERFORMANCE CHARACTERISTICS
2 3 4 5 6 7
64
65
66
67
68
69
70 Output ON Resistance vs. Supply Voltage
Switch-ON Resistance (mΩ)
Supply Voltage (V)
-60 -40 -20 0 20 40 60 80 100 120
50
60
70
80
90
ON Resistance (mΩ)
Temperature (
°
C
)
On-Resistance vs. Temperature
AIC1525
5
ON-State Supply Current vs. Supply Voltage
Supply Voltage (V)
Switch-ON Supply Current (µA)
2 3 4 5 6 7
50
60
70
80
90
100
-40 -20 0 20 40 60 80 100 120
2.3
2.4
2.5
2.6
2.7
2.8
rising
falling
UVLO Threshold Voltage vs. Temperature
Te
mperature (
°
C
)
UVLO
Threshold Voltage (V)
2.2
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
-40 -20 020 40 60 80 100 120
60
65
70
75
80
85
90
95 ON-State Supply Current vs. Temperature
Temperature (
°
C
)
Supply Current (µA)
-40 -20 0 20 40 60 80 100 120
10
4
10
3
10
2
10
1
OFF-State Supply Current vs. Temperature
Temperature (
°
C
)
Supply Current (µA)
OFF State Current vs. Supply Voltage
Supply Voltage (V)
Supply current (µA)
3 4 5 6 7 8
0
0.02
0.04
0.06
0.08
0.10
2
3
4
5
6
7
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
CTL rising
CTL falling
CTL Threshold Voltage vs. Supply Voltage
Supply Voltage (V)
Threshold voltage (V)
AIC1525
6
-40 -20 0 20 40 60 80 100 120
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
Output Rise Time vs. Temperature
Temperature (
°
C)
Turn-ON Resistance (mS)
-40 -20 0 20 40 60 80 100 120
0.38
0.40
0.42
0.44
0.46
0.48
0.50
0.52
0.54
Output fall Time vs. Temperature
Temperature (
°
C)
Turn-Off Fall Time (µS)
AIC1525
7
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
-60 -40 -20 0 20 40 60 80 100 120 140
0.85
0.90
0.95
1.00
1.15
Current Limit Threshold
Short Circuit Current Limit
Current Limit Threshold vs. Temperature
Temperature (°C)
Output Threshold (A)
FLG
IOUT
1A/10mV
Short Circuit Response
Thermal Shutdown
1A/10mV
0.8AFLG
IOUT
Current Limit Response
CTL
OUT
R=10Ω
Turn-On/Off Characteristic ( I )
1A/10mV
IOUT
VOUT
RL=35Ω
CL=100µF
Turn On/Off Characteristic (II)
AIC1525
8
n PIN DESCRIPTION
PIN 1: CTL -TTL compatible control input. It
controls the power switch turn-
on/turn-off. Active High for
AIC1525-1 and active low for
AIC1525-0.
PIN 2: FLG -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.
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
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
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.
AIC1525
9
Ferrite
Bead
0.01
µ
F33
µ
F
*
0.1
µ
F
33uF
5.0V
VCC
+
DATA
D+
D-
GND
VBUS
OVERCURRENT
10K
UU
SS
B
B
CC
oo
nn
tt
rr
oo
ll
l
l
ee
r
r
GND
VIN ON/OFF
4.50V to 5.25V
Upstream VBUS
100mA max
DATA
D+
D-
GND
VBUS
AIC1722
OUTIN
GND
+
1
µ
F
CIN 10
µ
F
COUT
+
*33
µ
F, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high- current traces
IN
OUT
OUT
CTL
FLG
GND
NC IN
AIC1525
One-Port Self-Powered Hub
n PHYSICAL DIMENSIONS
l 8 LEAD PLASTIC SO (unit: mm)
SYMBOL MIN MAX
A1.35 1.75
A1 0.10 0.25
B0.33 0.51
C0.19 0.25
D4.80 5.00
E3.80 4.00
e1.27(TYP)
H5.80 6.20
L0.40 1.27
D
H
e
A
B
A1
C
E
L
AIC1525
10
l 8 LEAD PLASTIC DIP (unit: mm)
SYMBOL MIN MAX
A1 0.381 —
A2 2.92 4.96
b0.35 0.56
C0.20 0.36
D9.01 10.16
E7.62 8.26
E1 6.09 7.12
e2.54 (TYP)
eB —10.92
b e
L
A2
A1
eB
E
C
E1
D
L2.92 3.81
