US1176 Ver la hoja de datos (PDF) - Unisem
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US1176 Datasheet PDF : 5 Pages
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US1176
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) ........................................................... 7V
Control Input Voltage (Vctrl) .................................................. 14V
Power Dissipation............................................. Internally Limited
Storage Temperature Range ................................... -65°C TO 150°C
Operating Junction Temperature Range ..................... 0°C TO 150°C
PACKAGE INFORMATION
7 PIN PLASTIC TO263 ( M )
7 PIN PLASTIC POWER FLEX (P)
FRONT VIEW
7
6
5
4
3
2
1
Vin
Vin
Vctrl
Vout
Adj
SD
Vsense
FRONT VIEW
7
6
5
4
3
2
1
Vin
Vin
Vctrl
Vout
Adj
SD
Vsense
θJA=35°C/W for 0.5" square pad θJA=35°C/W for 0.5" square pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,Cin=1uF,Cout=10uF, and Tj=0 to 125°C.Typical
values refer to Tj=25°C. Vout=Vsense.
PARAMETER
SYM TEST CONDITION
MIN TYP MAX UNITS
Reference Voltage
Vref Vctrl=2.75V,Vin=2V,Io=10mA
1.243 1.250 1.257
V
Tj=25,Vadj=0V
Vctrl=2.7to12V,Vin=2.05V to 5.5V, 1.237 1.250 1.263
Io=10mA to 7.5A,Vadj=0V
Line Regulation
Vctrl=2.5Vto7V,Vin=1.75Vto5.5V
,Io=10mA ,Vadj=0V
0.5
mV
Load Regulation (note 1)
Vctrl=2.75V,Vin=2.1V,Io=10mA
to 7.5A,Vadj=0V
5
mV
Dropout Voltage (note 2)
Vadj=0V for all conditions below.
(Vctrl - Vout)
Vin=2.05V,Io=1.5A
0.95
V
Vin=2.05V,Io=3A
1.00
Vin=2.05V,Io=4A
1.05
Vin=2.05V,Io=7.5A
1.15
Dropout Voltage (note 2)
Vadj=0V for all conditions below.
(Vin - Vout)
Vctrl=2.75V,Io=1.5A
0.075
V
Vctrl=2.75V,Io=3A
0.150
Vctrl=2.75V,Io=4A
0.200
Vctrl=2.75V,Io=7.5A
0.375
Current Limit
Vctrl=2.75V,Vin=2.05V,
dVo=100mV Vadj=0V
7.7 9
A
Minimum Load Current (note 3)
Vctrl=5V,Vin=3.3V,Vadj=0V,
5
10
mA
Thermal Regulation
30 mS Pulse
0.01 0.02 %/W
Ripple Rejection
Vctrl=5V,Vin=5V,Io=4A,Vadj=0V 60 70
dB
Tj=25,Vripple=1Vpp at 120Hz
S.D Threshold Voltage
Vctrl - 1.4 Vctrl - 2.2
V
S.D Input Current
Vctrl=5V, S.D=0V
94 130 uA
2-2
Rev. 1.1
9/24/99
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