UNISONIC TECHNOLOGIES CO., LTD
US204
Preliminary
CMOS IC
100mΩ, 1/1.5A HIGH-SIDE
POWER SWITCHES WITH FLAG
DESCRIPTION
The UTC
US204
series are 100mΩ high-side power switches.
There are internal duel low voltage N-Channel MOSFETS which
whish is ideal all USB applications. These MOSFETS is driven by a
charge pump circuitry inside, these switches on resistance are as
low as 100mΩ which and meet the drop voltage for USB
applications.
The flag pins output an open-drain fault flag to next controller.
There’re lots internal special ways for protecting the chip’s
operation. There are also built-in protection circnits to ensure the
chips function normally.
When in hot-plug events, there’s large current which can create
the upstream voltage droop to match the USB’s voltage droop
requirements and soft-start for isolating the power source.
As soon as the die temperature is higher than 130℃, the internal
shutdown circuit will work.
Only when there’s a normal input voltage in the V
IN
pin, the UVLO
(under-voltage lockout, 2.1V typ.) can make sure the chip is in the
off state.
Because of the requirement of USB power, the fault current
should be ensured to be less than 1.5A for UTC
US204AH/AL
and
1.0A for UTC
US204CH/CL.
SOP-8
FEATURES
* 100mΩ(Typ) N-Channel MOSFET
* Supply Current:
–
Switch On : 60μA (Typ)
–
Switch Off : 1μA (Typ)
* Load Current 1.5A for US204AH/AL and 1.0A for US204CH/CL
* Input Voltage from 2V ~ 5.5V
* In Off-State: Output Voltage can be Higher than Input
RDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US204XXL-S08-R
US204XXG-S08-R
Package
SOP-8
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
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QW-R502-601.a
US204
PIN CONFIGURATION
Preliminary
CMOS IC
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
PIN NAME
GND
V
IN
CTL1
CTL2
FLG2
V
OUT2
V
OUT1
FLG1
DESCRIPTION
Ground
Power input voltage
Chip Enable turns on power switch in V
OUT1
.
Chip Enable turns on power switch in V
OUT2
.
Over current or over temperature status output, open-drain output, active low, in V
OUT2
.
Power-Switch Output, in V
OUT2
.
Power-Switch Output, in V
OUT1
.
Over current or over temperature status output,, open-drain output, active low, in V
OUT1
.
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QW-R502-601.a
US204
BLOCK DIAGRAM
Preliminary
CMOS IC
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US204
PARAMETER
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
(Ta=25°С, unless otherwise specified)
RATINGS
UNIT
6.0
V
Supply Voltage
V
CC
+2 ~ +5.5 (Note 2)
V
-0.3~ +6.0
V
CTL
V
CTL
Input/Output Pins
0 ~ +5.5 (Note 2)
V
FLG
V
FLG
6.0
V
Power Dissipation (Ta=25°С)
P
D
0.3
W
150
℃
Junction Temperature
T
J
-20 ~ +100 (Note 2)
℃
Storage Temperature
T
STG
-65 ~ +150
℃
Notes:1. 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.
2. The device is not guaranteed to function when it’s beyond its operating conditions.
SYMBOL
ELECTRICAL CHARACTERISTICS
PARAMETER
ENABLE INPUT
CTL Threshold
CTL Input Current
UNDER VOLTAGE LOCK
Under-Voltage Lockout
Under-Voltage Hysteresis
SUPPLY CURRENT
Supply Current
Output Leakage Current
CURRENT LIMIT
Current Limit
Short Circuit Fold-Back Current
POWER SWITCH
Switch ON Resistance
Output Turn-ON Rise Time
OVER CURRENT FLAG
FLAG OFF Current
FLAG Output Resistance
FLAG Delay Time
THERMAL SHUTDOWN
Thermal Shutdown Protection
Thermal Shutdown Hysteresis
US204Ax
US204Cx
R
DS(ON)
t
ON
(
RISE
)
I
FLG(OFF)
R
FLG
t
D
T
SD
∆T
SD
I
OUT
=1.3A, V
IN
=5V,Each Channel
I
OUT
= 1A, V
IN
=5V,Each Channel
10% ~ 90% of V
OUT
rising
V
FLG
=5V
I
SINK
=1mA
From fault condition to FLG
assertion
5
100
100
400
0.01
20
12
130
20
110
110
mΩ
mΩ
µs
µA
Ω
ms
US204Ax
US204Cx
US204Ax
US204Cx
Low
High
SYMBOL
V
IL
V
IH
I
I(CTL)
V
UVLO
∆V
UVLO
I
SW(ON)
I
SW(OFF)
I
O(LEAK)
I
LIMIT
I
SC
(
FB
)
TEST CONDITIONS
V
IN
=2V~5.5V, Switch OFF
V
IN
=2V~5.5V, Switch ON
V
CTL
=0V~5.5V
V
IN
increasing
V
IN
decreasing
Switch on, V
OUT
=OPEN
Switch off, V
OUT
=OPEN
V
CTL
=0V, R
LOAD
=0Ω
V
OUTX
=4V
V
OUT
=0V, measured prior to
thermal shutdown
1.5
1.1
MIN
TYP MAX UNIT
0.8
2.0
0.01
2.1
0.1
65
0.1
0.5
2.0
1.5
1.4
1.0
90
1
1
2.8
2.1
V
V
µA
V
V
µA
µA
µA
A
A
A
A
1
400
15
℃
℃
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QW-R502-601.a
US204
TEST CIRCUIT
Preliminary
CMOS IC
R
FG
V
IN
C
I
Chip
Enable
CTL
V
IN
UTC
US204
GND
V
OUT
FLG
S1
V
FLG
V
OUT
A
I
OUT
C
O
R
L
I
L
Turn-On & Off Response, Flag Response
S2
V
IN
V
IN
C
I
CTL
UTC
US204
GND
V
OUT
FLG
R
FG
V
FLG
V
OUT
I
OUT
A
S3
C
O
R
L
I
L
Current Limit vs. Input Voltage, Inrush Current Response,
Current Limit Transient Response
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嵌入式系统
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