AIC1525
USB High-Side Power Switch
Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan DS-1525-01 012102
www.analog.com.tw TEL: 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 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.
n TYPICAL APPLICATION CIRCUIT
Ferrite
Bead
0.01
µ
F
33
µ
F
*
0.1
µ
F
33
µ
F
5.0V
VCC
DATA
D+
D-
GND
VBUS
OVERCURREN
10K
UU
SS
BB
CC
tt
rr
ll
ll
rr
GND
VIN
ON/OFF
4.50
V
to 5.25V
Upstream VBUS
100mA max
DATA
AIC
1722
OUT
IN
GND
+
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
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
PACKAGING TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
CONTROL POLARITY
0: Active Low
1: Active High
AIC1525-XCXXX PIN CONFIGURATION
TOP VIEW
OUT
OUT
IN
IN
GND
FLG
NC
CTL 1
3
4
2
8
6
5
7
Example: AIC1525-0CSTR
à Active Low Version in SO-8 Package &
Taping & Reel Packing Type
(CN is not available in TR packing type.)
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
V
CC
+5V
10
Ω
0.1
µ
F
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 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 TYPICAL PERFORMANCE CHARACTERISTICS
2 3 4 5 6 7
64
65
66
67
68
69
70
Fig. 1 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)
Fig. 2 On-Resistance vs. Temperature
Fig. 3 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
Fig. 4 UVLO Threshold Voltage vs. Temperature
Temperature (°C)
UVLO
Threshold Voltage (V)
2.2
-40 -20 0 20 40 60 80 100 120
60
65
70
75
80
85
90
95
Fig. 5 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
Fig. 6 OFF-State Supply Current vs. Temperature
Temperature (°C)
Supply Current (µA)
AIC1525
5
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Fig. 7 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
234567
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
Fig. 8 CTL Threshold Voltage vs. Supply Voltage
Supply Voltage (V)
Threshold voltage (V)
-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
Fig. 9 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
Fig. 10 Output fall Time vs. Temperature
Temperature (°C)
Turn-Off Fall Time (µS)
-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
Fig. 11 Current Limit Threshold vs. Temperature
Temperature (°C)
Output Threshold (A)
AIC1525
6
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
FLG
IOUT
1A/10mV
Fig. 12 Short Circuit Response
Thermal Shutdown
1A/10mV
0.8AFLG
IOUT
Fig. 13 Current Limit Response
CTL
OUT
R=10Ω
Fig. 14 Turn-On/Off Characteristic ( I )
1A/10mV
IOUT
VOUT
RL=35Ω
CL=100µF
Fig. 15 Turn-On/Off Characteristic (II)
AIC1525
7
n BLOCK DIAGRAM
FLG
CTL
OUT
CHARGE PUMP
THERMAL
SHUTDOWN
DRIVER
UVLO IN
CURRENT
LIMIT
POWER N-MOSFET
CS
GND
n PIN DESCRIPTIONS
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.
AIC1525
8
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.
Ferrite
Bead
0.01
µ
F
33
µ
F
*
0.1
µ
F
33
µ
F
5.0V
VCC
+
DATA
D+
D-
GND
VBUS
OVERCURRENT
10K
UU
SS
B
B
CC
tt
rr
ll
l
l
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
A
B
A1
C
E
L
AIC1525
9
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