US1205-33CL 반도체 회로 부품 판매점
300 mA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
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 UNISEM |
US1205
FEATURES
SOT23 package
Stable with 2.2uF ceramic capacitor
1% Voltage Reference Accuracy
Only 270mV Dropout at 300 mA
170mV Dropout at 150mA
10nA Quiescent Current in Shutdown
Current Limit and Thermal Shutdown
Logic input Enable pin
APPLICATIONS
Laptop, Notebook & Palmtop computers
Battery powered Equipments
PCMCIA Vcc & Vpp regulator
Concumer Electronics
High Efficiency Linear Power Supplies
300 mA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
PRELIMINARY DATASHEET
DESCRIPTION
The US1205 device is an efficient linear voltage regula-
tor with better than 1% initial voltage accuracy, very low
dropout voltage and very low ground current designed
especially for hand held, battery powered applications.
Other features of the device are; TTL compatible enable/
shutdown control input, current limiting and thermal
shutdown.
The US1205 is available in fixed and adjustable output
voltage versions in a small SOT23-5 package.
TYPICAL APPLICATION
Vin
C1
2.2uF
S.D. Enable
1 Vin
2 Gnd
3 En
Vout 5
Adj 4
Vout
R1
C2 Vo=1.242 X (1+R1/R2)
R2 2.2uF
1205app1-1.1
Typical application of the US1205 ajustable.
3.3V
C1
2.2uF
1 Vin
2 Gnd
Vout 5
2.5V
C2
2.2uF
S.D. Enable
3 En
Byp 4
C3
1000pF
1205app2-1.2
Typical application of the US1205 Fixed voltage.
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
5 LEAD
SOT 23
US1205CL
US1205-25CL
US1205-30CL
US1205-33CL
US1205-36CL
SOT23
Marking
AT00
AT25
AT30
AT33
AT36
Output
Voltage
Adj
2.5 V
3.0 V
3.3 V
3.6 V
Rev. 1.4
9/25/00
2-1
US1205
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) ............................................................. 10V
Enable Input Voltage ........................................................... 10V
Storage Temperature Range ................................ -65°C TO 150°C
Operating Junction Temperature Range ...................... 0°C TO 150°C
PACKAGE INFORMATION
5 PIN SOT23 ( L ) Adjustable
En Gnd Vin
321
5 PIN SOT23 ( L ) Fixed
En Gnd Vin
321
AT00
θJA=220°C/W
ATxx
θJA=220°C/W
45
Adj Vout
45
Byp Vout
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,Cin=Co=22uF, Io=100uA, Vinmin=2.5V(Adjustable
devices) Vin=Vo+1V(for fixed voltage devices), Vout=Vfb (for adjustable version only), Cbyp=470pF(for fixed output
versions only), Venb=2V and Ta=25°C. Typical values refer to Ta=25 °C.Low duty cycle pulse testing are used
which keeps junction and case temperatures equal to the ambient temperature.
PARAMETER
SYM TEST CONDITION
MIN TYP MAX UNITS
Reference Voltage
Vo
-1 1 %
See Table 1 for typical values
(Note 4)
-2 2
Line Regulation
dVi Vo+1V<Vin<10
0.005
%/V
Load Regulation (note 1)
dVL 1mA<Io<100mA
0.8 %
100mA<Io<300mA
0.1 %
Dropout Voltage (note 2)
dVio Io=100uA
10 50
mV
Io=100uA (Note 4)
13 70
mV
Io=50mA
85 110
mV
Io=50mA (Note 4)
100 140
mV
Io=150mA
170 220
mV
Io=150mA (Note 4)
204 260
mV
Io=300mA
270 350
mV
Io=300mA (Note 4)
324 400
mV
Ground Current (Note 3)
Iq Ven=2V, Io=100uA
120 160
uA
Io=100uA (Note 4)
240 uA
Io=50mA
420 600
uA
Io=50mA (Note 4)
540 uA
Io=150mA
2200 2900
uA
Io=150mA (Note 4)
2900
uA
Io=300mA
7200 9500
uA
Io=300mA (Note 4)
9300
uA
Ground Current-S.D Activated Iqsd S.D pin<0.1V
0.1 uA
S.D pin=0.8V
8
Current Limit
Icl Vo=0V
320 420
mA
Thermal Regulation
dVp Vin=10V, Io=150mA,10 mS PULSE
0.05
%/W
Adjust Pin Current
Iadj Vin=2.5V,Vo=Vadj
0.1 uA
Enable pin input LO voltage Venl Regulator OFF
0.8 V
Enable pin input HI voltage Venh Regulator ON
2
V
Enable pin input LO current
Venl=0V to 0.8V
0.01 uA
Enable pin input HI current
Venh=2V to Vin
20 uA
2-2
Rev. 1.4
9/25/00
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US1205-33CL regulator
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