UNISONIC TECHNOLOGIES CO., LTD
US2075A
DUAL-CHANNEL POWER
DISTRIBUTION CONTROL
SWITCH FOR USB
DESCRIPTION
The UTC
US2075A
is a dual channel power switch with
independent enable and flag functions, optimized for bus-powered
Universal Serial Bus (USB) and self-powered applications.
This product satisfies USB voltage drop requirement with soft
start, which eliminates the momentary voltage drop on the upstream
port that may occur.
In addition, the UTC
US2075A
is equipped with over-temperature
and over-current detectors, each flag output is available to indicate
fault conditions independently to the USB controller. The UTC
US2075A
is available in active-low versions in 8-pin SOP package.
CMOS IC
Lead-free:
US2075AL
Halogen-free: US2075AG
FEATURES
* 100
μA
MAX operating current
* 5μA MAX standby current
* 3.5V ~ 5.5V operating range
* Two P-channel power MOSFET control switch
* Over-current protection
* Under-voltage lockout circuit
* Thermal shutdown circuit
* Soft-start circuit
* Flag indicates fault conditions
ORDERING INFORMATION
Normal
US2075A-S08-R
US2075A-S08-T
Ordering Number
Lead Free
US2075AL-S08-R
US2075AL-S08-T
Halogen Free
US2075AG-S08-R
US2075AG-S08-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2008 Unisonic Technologies Co., Ltd
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QW-R502-060,E
US2075A
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
PIN NAME
EN1
FLAG1
FLAG2
EN2
OUT2
GND
IN
OUT1
DESCRIPTION
Switch1 Enable Input: Logic-compatible, active-low. TTL input
Fault Detection Flag 1 (OUTPUT): Active-low. N-ch open-drain. Indicates over-current,
thermal shutdown, or UVLO conditions
Fault Detection Flag 2 (OUTPUT): Active-low. N-ch open-drain. Indicates over-current,
thermal shutdown, or UVLO conditions
Switch2 Enable Input: Logic-compatible, active-low. TTL input
Switch2 Output: Drain of MOSFET for output. Usually, connected to Load
Ground
Power Input: Source of MOSFET for output. Power supply to Internal circuit
Switch1 Output: Drain of MOSFET for output. Usually, connected to Load
TRUTH TABLE
(H: High, L: Low, ON: Turn on, OFF: Turn off, X: H or L)
EN1
(IN)
L
L
H
H
L
L
X
X
FLAG1
(OUT)
H
H
H
H
L
H
L
L
OUT1
(OUT)
ON
ON
OFF
OFF
ON
ON
OFF
OFF
EN2
(IN)
L
H
L
H
L
L
X
X
FLAG2
(OUT)
H
H
H
H
H
L
L
L
OUT2
(OUT)
ON
OFF
ON
OFF
ON
ON
OFF
OFF
Operation Mode
Normal Operation
Only OUT1 is ON.
Only OUT2 is ON.
Standby Mode
Overcurrent Detection Only for OUT1
Overcurrent Detection Only for OUT2
Thermal Shutdown Circuit Operation
Undervoltage Lockout Circuit Operation
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US2075A
BLOCK DIAGRAM
CMOS IC
2 FLAG1
EN
Control
FLAG
LOGIC
EN1 1
8 OUT1
Gate
Control
Current
Limit
Thermal
Shutdown
Current
Limit
GND 6
UVLO
7 IN
Gate
Control
5 OUT2
3 FLAG2
EN
Control
FLAG
LOGIC
EN2 4
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US2075A
ABSOLUTE MAXIMUM RATINGS
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
-0.3 ~ +6
V
Flag Voltage
V
FLAG
-0.3 ~ +6
V
Flag Current
I
FLAG
50
mA
Output Voltage
V
OUT
V
IN
+0.3
V
Output Current
I
OUT
-0.1 ~ +0.5
A
Control Input
V
EN
-0.3 ~ +6
V
Total Power Dissipation
P
D
300
mW
Junction Temperature
T
J
+150
℃
Operating Temperature
T
OPR
0 ~ +85
℃
Storage Temperature
T
STG
-55 ~ +150
℃
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING RANGE
PARAMETER
Thermal Shutdown Protection
SYMBOL
T
SHDN
TEST CONDITIONS
Temperature rising
Temperature hysteresis
MIN
TYP
150
5
MAX
10
UNIT
℃
℃
DC ELECTRICAL CHARACTERISTICS
(V
IN
=+5V, T
OPR
=+25℃, Unless otherwise specified)
PARAMETER
Input Voltage
EN Voltage, Low
EN Voltage, High
Under-Voltage Lockout
SYMBOL
TEST CONDITIONS
V
IN
V
IL
EN pin (Note)
V
IH
EN pin (Note)
V
IN
=increasing
V
UVLO
V
IN
=decreasing
Hysteresis voltage
V
EN
=GND or V
E N
= V
IN
,
I
SW_ON
V
OUT1
=V
OUT2
=Open
V
EN
= V
IN
or V
E N
=GND,
I
SW_OFF
V
OUT1
=V
OUT2
=Open
I
O(LEAK)
V
EN
= V
IN
or V
E N
=GND
I
F(LEAK)
V
FLAG
=5V
I
LIMIT
T
a
=0~80℃
R
OUT
I
L
=10mA
R
ON
I
OUT
=500mA
MIN
3.5
2.0
2.2
2.0
0.05
TYP
5
MAX
5.5
1.0
2.8
2.6
0.25
100
1
0.1
0.9
10
105
5
10
1
1.25
20
145
UNIT
V
V
V
V
V
V
μA
μA
μA
μA
A
Ω
mΩ
2.5
2.3
Supply Current
Output Leakage Current
Flag Leakage Current
Current Limit
Flag Output Resistance
Output MOSFET on-Resistance
Note: ON is EN<1.0V and OFF is EN>2.0V
0.6
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
Output Turn-on Rise Time
t
R
R
L
=10Ω, per output
Output Turn-off Fall Time
t
F
R
L
=10Ω, per output
Over-Current Detection Delay Time
t
DELAY
Over-Current Detection Output Rise Time
t
DECR
R
L
=10Ω, per output
MIN
2.5
TYP
5
20
5
MAX
8
10
8
UNIT
ms
μs
μs
ms
2.5
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TEST CIRCUIT
CMOS IC
V
IN
1M
1M
10K
10K
C
IN
FLAG1
IN
FLAG2
UTC
US2075A
EN1
S2
S1
EN2
GND
OUT2
C
L2
R
L2
OUT1
C
L1
V
OUT1
R
L1
V
OUT2
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www.unisonic.com.tw
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QW-R502-060,E
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