AIC AIC1523-1CO 500ma power distribution switch Datasheet

AIC1523
500mA Power Distribution Switch
n FEATURES
n DESCRIPTION
• 120mΩ (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current.
l 80µA Typical On-State Supply Current.
l 1µA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Limiting Protection under Overcurrent
Condition.
l Output can be Forced Higher than Input (Off-State).
l Active-High or Active-Low Enable.
The AIC1523 is an integrated high-side power
switches for input power selection applications
that using in portable products or PCI interface
peripheral cards. The high-side switch is a
MOSFET with 120mΩ RDS(ON), low voltage drop
and low power consumption meet power saving
requirements . The switch ON/OFF is controlled
by CTL pin.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
n APPLICATIONS
l
l
l
l
Power Management.
PCI Cards With Wake-On- LAN
Hot Plug-In Power Supplies.
Power Distribution Switch.
Design easily and layout flexibility for getting
stable voltage in power transfer transition for power
selection application. 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
AIC1523-0
VCC
5.0V
IN
+
33µF
VOUT
OUT
+
0.1µF
CTL
GND
* 33µF
0.01µ F
* 33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
High-Side Power Distribution Switch
Analog Integrations Corporation
www.analog.com.tw
DS-1523-00
May 30, 01
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
1
AIC1523
n ORDERING INFORMATION
AIC1523-XCX
ORDER NUMBER
FRONT VIEW
AIC1523-0CO
AIC1523-1CO
(MSOP8)
PACKAGING TYPE
O: MSOP
S: SO8
PIN CONFIGURATION
CONTROL POLARITY
0: Active Low
1: Active High
NC 1
8 NC
CTL 2
7 OUT
IN 3
6 NC
5 GND
NC 4
FRONT VIEW
AIC1523-0CS
AIC1523-1CS
(SO8)
NC 1
8 NC
CTL 2
7 OUT
IN 3
6 NC
5 GND
NC 4
n ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V IN)
.......................................................… … … … .......… … ........... 7.0V
Operating Temperature Range
Storage Temperature Range
......… … … ..............… … … … … .… ............... -40°C ~ 85°C
....................................… … … .................. -65°C ~ 150°C
n ELECTRICAL CHARACTERISTICS (V
IN=
5V, Ta=25°C, unless otherwise
specified.)
PARAMETERS
Supply Current
Control Input Voltage
CONDITIONS
MIN.
TYP.
MAX.
Switch Off, OUT=Open
0.75
2
Switch On, OUT=Open
80
100
VCTL =Logic “0”
VCTL =Logic “1”
0.8
2.4
UNIT
µA
V
VCTL =Logic “0”
0.01
1
Control Input Current
VCTL =Logic “1”
0.01
1
Output MOSFET Resistance
IOUT = 500mA
120
180
Output Turn-On Rise Delay
RL = 10Ω
30
µS
Output Turn-On Rise Time
RL = 10Ω
500
µS
Output Turn-Off Delay
RL = 10Ω
0.2
10
µA
mΩ
µS
2
AIC1523
n ELECTRICAL CHARACTERISTICS (Continued)
PARAMETERS
CONDITIONS
Output Turn-Off Fall Time
MIN.
TYP.
MAX.
UNIT
0.2
10
µS
2
µA
1.25
A
RL = 10Ω
Output Leakage Current
Current Limit Threshold
Vin = 5.0V
0.6
Current Limit Threshold
Vin = 2.4V
0.6
1.0
A
Thermal Limit
°C
110
n BLOCK DIAGRAM
Thermal
Protection
OSC.
CTL
IN
Charge
Pump
Current
Limit
RS
GATE
NMOS
Gate Control
GND
OUT
n TYPICAL PERFORMANCE CHARACTERISTICS
On-State Supply Current vs. Temperature
On-State Supply Current vs. Supply
90
85
80
Supply Current (µA)
Supply Current (µA)
85
75
70
65
60
80
75
70
55
50
2.0
65
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Supply Voltage (V)
6.0
6.5
7.0
7.5
-40
-20
0
20
40
60
80
100
Temperature (°C)
3
AIC1523
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Off-State Supply Current vs. Temperature
Off-State Supply Current vs. Supply Voltage
20
4.5
18
4.0
Supply Current (nA)
Supply Current (nA)
16
3.5
3.0
2.5
2.0
1.5
14
12
10
8
6
4
1.0
2
0.5
2.0
130
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
0
7.5
-40
-20
0
20
40
60
80
Supply Voltage (V)
Temperature (°C)
Output On Resistance vs. Supply Voltage
Output On Resistance vs. Temperature
100
Switch On Resistance (m Ω)
Switch_ON Ristance (mΩ)
150
125
120
115
110
105
140
130
120
110
100
90
80
100
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
-40
7.5
-20
20
40
60
80
100
Output Rise Time vs. temperature
Current Limit vs. Supply Voltage
1000
0
Temperature (°C)
Supply Voltage
550
Output Rise Time (µ S)
Current Limit (mA)
900
500
800
700
450
600
400
500
400
2.0
350
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Supply Voltage (V)
6.0
6.5
7.0
-40
-20
0
20
40
Temperature (°C)
60
80
100
4
AIC1523
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued )
Output Fall Time vs. Temperature
CTL Threshold Voltage vs. Supply Voltage
300
2.4
2.0
Output Fall Time (nS)
2.2
CTL rising
1.8
1.6
1.4
1.2
1.0
CTL falling
250
200
150
100
0.8
0.6
2.0
50
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
-40
-20
0
Supply Voltage (V)
Turn On Rising Time (10Ω loading)
20
40
60
80
Temperature (° C)
100
Turn On Characteristic (35 Ω, Loading)
220µF
200mA/DIV
IOUT
100µF
I OUT, 200mA/DIV
VOUT
426µS
No Cap
CTL
CTL
Turn Off Falling Time (10 Ω Loading)
IOUT
200mA/DIV
VOUT
107nS
CTL
5
AIC1523
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Turn On Characteristic (35Ω , 100µF Loading)
Turn Off Falling Time (35Ω, 100uF Loading)
IOUT
500mA/DIV
500mA/DIV
IOUT
VOUT
VOUT
CTL
CTL
Current Limit Threshold
Thermal Limiting Transient Response
VOUT
VOUT
1.2A
1A
I OUT
I OUT
Thermal limit (2Ω ) loading)
500mA/DIV
500mA/DIV
Short Circuit Testing
Short Circuit Response Time
Short
VOUT
Thermal Oscillation
I OUT
I OUT
1A/DIV
500mA/DIV
VOUT
6
AIC1523
n PIN DESCRIPTION
PIN 1/4/6/8: NC:
PIN 2: CTL
- TTL compatible control input. It
controls the power switch turnon/turn-off.
Active High for
AIC1523-1 and active low for
AIC1523-0.
PIN 3: IN-
Power supply input.
PIN 4: GND-
Chip power ground.
PN 7: OUT-
MOSFET switch output.
n APPLICATION INFORMATIONS
l Current Limit
l
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 AIC1523
allows minimum 500mA continuous load current
per Channel.
l Thermal Protection
l
l
Supply Filtering
A 0.1uF to 1uF 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.
Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event. With
a 33uF, 16V tantalum or 100uF, 10V electrolytic
capacitor mounted close to downstream connector
should provide transient drop protection.
When the chip temperature exceeds 110°C, the
thermal protection function works.
l
Transient Droop Requirements
A current surge is caused by the input capacitance
of 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
Printed Circuit Layout
The power circuitry of
printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
7
AIC1523
■ PHYSICAL DIMENSIONS
l
MSOP 8 (unit: mm)
D
H
E
e
SYMBOL
MIN
MAX
A
0.76
0.97
A1
--
0.20
B
0.28
0.38
C
0.13
0.23
D
2.90
3.10
E
2.90
3.10
e
A
A1
C
B
H
4.80
5.00
L
0.40
0.66
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
L
8 LEAD PLASTIC SO (unit: mm)
D
H
E
e
e
A
C
A1
l
0.65
B
1.27(TYP)
H
5.80
6.20
L
0.40
1.27
L
8
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