US203(2011) Ver la hoja de datos (PDF) - Unisonic Technologies
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US203 Datasheet PDF : 7 Pages
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US203
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA = 25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VIN
6.5
V
Enable Input Voltage
VEN
-0.3 ~ +6.5
V
Flag Voltage
VFLG
6.5
V
Power Dissipation (TA = 25°C)
PD
0.4
W
Junction Temperature
TJ
150
°C
Storage Temperature
TSTG
-65~150
°C
Notes: 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.
THERMAL DATA
PARAMETER
Junction to Ambient
SOT-25
SOP-8
SYMBOL
θJA
RECOMMENDED OPERATING CONDITIONS
RATINGS
250
160
UNIT
°C/W
PARAMETER
Supply Input Voltage
Enable Input Voltage
Junction Temperature
Ambient Operating Temperature
SYMBOL
VIN
VI(EN)
TJ
TOPR
RATINGS
2.5 ~ 5.5
0 ~ 5.5
-40 ~ +125
-40 ~ +85
UNIT
V
V
°C
°C
ELECTRICAL CHARACTERISTICS (VIN = 5V, CIN = COUT = 1μF, TA = 25°C, unless otherwise specified)
PARAMETER
SYMBOL TEST CONDITIONS MIN
Switch On Resistance
(US203AH,US203AL)
Switch On Resistance
(US203CH,US203CL)
SOT-25
SOP-8
SOT-25
SOP-8
RDS(ON)
IOUT= 1A, VIN= 5V
IOUT= 0.5A, VIN= 5V
Supply Current
ISW_ON switch on, RLOAD Open
ISW_OFF switch off, RLOAD Open
EN Threshold Voltage
Logic-Low
VIL VIN = 2.5V ~ 5.5V
Logic-High
VIH VIN = 2.5V ~ 5.5V
2.0
EN Input Current
IEN VEN/EN = 0V ~ 5.5V
Output Leakage Current
IO(LEAK) VEN=0V, RLOAD= 0Ω
Output Turn-On Rise Time
TON(RISE) 10% to 90% of VOUT rising
Current Limit
US203Ax
US203Cx
Current Ramp (< 0.1A/ms) 1.6
ILIMIT
on VOUT
0.7
Short Circuit Fold-Back
Current
US203Ax
US203Cx
ISC(FB)
VOUT = 0V, measured prior
to thermal shutdown
FLAG Output Resistance
RFLG ISINK= 1mA
FLAG Off Current
IFLG_OFF VFLG = 5V
FLAG Delay Time
From fault condition to FLG
tD
assertion
5
Shutdown Pull-Low Resistance
RDS VEN=0V, VEN
Under-Voltage Lockout
Under-Voltage Hysteresis
VUVLO VIN increasing
1.3
△VUVLO VIN decreasing
Thermal Shutdown Protection
Thermal Shutdown Hysteresis
TSD
△TSD
Note: The device is not guaranteed to function outside its operating conditions.
TYP
80
90
80
90
25
0.1
0.01
0.5
400
2.5
1
1
0.8
20
0.01
12
75
1.7
0.1
130
20
MAX
100
110
100
110
45
1
0.8
10
3.2
1.4
UNIT
mΩ
mΩ
μA
V
V
μA
μA
μs
A
A
A
400 Ω
1
μA
20 ms
150 Ω
V
V
°C
°C
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 7
QW-R502-435.e
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