UNISONIC TECHNOLOGIES CO., LTD
US2075A/B
DUAL-CHANNEL POWER
DISTRIBUTION CONTROL
SWITCH FOR USB
DESCRIPTION
The UTC
US2075A/B
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/B
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/B
is available in active-low versions
in 8-pin SOP package.
CMOS IC
* Pb-free plating product number:
US2075AL/US2075BL
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
Order Number
Normal
Lead Free Plating
US2075A-S08-R
US2075AL-S08-R
US2075A-S08-T
US2075AL-S08-T
US2075B-S08-R
US2075BL-S08-R
US2075B-S08-T
US2075BL-S08-T
Package
SOP-8
SOP-8
SOP-8
SOP-8
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2006 Unisonic Technologies Co., Ltd
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PIN CONFIGURATION
CMOS IC
EN1
1
8
OUT1
FLAG1
2
UTC US2075B
7
IN
FLAG2
3
6
GND
EN2
4
5
OUT2
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
PIN NAME
EN1
DESCRIPTION
Switch1 Enable Input: Logic-compatible, active-low. TTL input
Switch1 Enable Input: Logic-compatible, active-high. 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 Enable Input: Logic-compatible, active-high. 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
EN1
FLAG1
FLAG2
EN2
EN2
OUT2
GND
IN
OUT1
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
EN1
(IN)
H
H
L
L
H
H
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
EN2
(IN)
H
L
H
L
H
H
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
UNISONIC TECHNOLOGIES CO., LTD
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QW-R502-060,D
US2075A/B
BLOCK DIAGRAM
CMOS IC
FLAG1
EN
Control
FLAG
LOGIC
EN1
(EN1)
OUT1
Gate
Control
Current
Limit
Thermal
Shutdown
Current
Limit
GND
UVLO
IN
Gate
Control
OUT2
FLAG2
EN
Control
FLAG
LOGIC
EN2
(EN2)
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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
/V
E N
-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)
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Voltage
V
IN
3.5
5
5.5
V
EN Voltage, Low
V
IL
EN pin (Note 1)
1.0
V
EN Voltage, High
V
IH
EN pin (Note 1)
2.0
V
V
IN
=increasing
2.2
2.5
2.8
V
Under-Voltage Lockout
V
UVLO
V
IN
=decreasing
2.0
2.3
2.6
V
Hysteresis voltage
0.05
0.25
V
V
EN
=GND or V
E N
= V
IN
,
100
µA
I
SW_ON
V
OUT1
=V
OUT2
=Open
Supply Current
V
EN
= V
IN
or V
E N
=GND,
1
5
µA
I
SW_OFF
V
OUT1
=V
OUT2
=Open
Output Leakage Current
I
O(LEAK)
V
EN
= V
IN
or V
E N
=GND
10
µA
Flag Leakage Current
I
F(LEAK)
V
FLAG
=5V
0.1
1
µA
Current Limit
I
LIMIT
T
A
=0~80℃
0.6
0.9
1.25
A
Flag Output Resistance
R
OUT
I
L
=10mA
10
20
Ω
Output MOSFET on-Resistance
R
ON
I
OUT
=500mA
105
145
mΩ
Note 1. For US2075A, ON is EN<1.0V and OFF is EN>2.0V. For US2075B, ON is
EN
>2.0V and OFF is
EN
<1.0V.
PARAMETER
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/B
EN1/EN1
S2
S1
EN2/EN2
GND
OUT2
C
L2
R
L2
OUT1
C
L1
V
OUT1
R
L1
V
OUT2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-060,D
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