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US1206-33CM Schematic ( PDF Datasheet ) - UNISEM

Teilenummer US1206-33CM
Beschreibung 1A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE & FIXED REGULATOR
Hersteller UNISEM
Logo UNISEM Logo 




Gesamt 7 Seiten
US1206-33CM Datasheet, Funktion
US1206/1207/1208/1209
1A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE & FIXED REGULATOR
PRELIMINARY DATASHEET
FEATURES
DESCRIPTION
Low Droput Voltage (500mV at 1A)
1% Voltage Reference Accuracy
Low Ground Current
10uA Quiescent Current in Shutdown
(US1207,1208)
Fast Transient Response
Current Limit and Thermal Shutdown
Error Flag Signal for Output out of Regulation
(US1207,1209)
Pin Compatible with MIC39100/101/102 series
APPLICATIONS
2.5V Supply from 3.3V Input for the new genera-
tion of Logic ICs
Computer Mother Board, Add on Cards
High Efficiency Post Regulator in SMPS
The US1206 family of devices are ultra low dropout 1A
regulators using PNP transistor as the pass element.
These products are ideal when a single input supply is
available only and the dropout voltage is less than 1V,
exceeding the minimum dropout characteristics of NPN/
PNP hybrid regulators. One common application of these
regulators are where input is 3.3V and a 2.5V output is
needed.
Besides the low dropout of less than 0.5V, other fea-
tures of the family of the parts are; micropower shutdown
capability and output UVLO detection where Flag pin is
switched low when output is below 5% of its nominal
point. The US1206-XX in SOT223 is pin compatible with
MIC39100-XX, US1207 and 1209 in SO8 power package
are compatible with MIC39101 and 39102 respectively.
TYPICAL APPLICATION
Vout 3
US1206-XX Gnd 2
Vin 1
Vout
C2
1206app1-1.0
Vin
C1
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
3 LEAD
5 LEAD
TO252
TO263
US1206-18CD US1206-18CY
US1206-25CD US1206-25CY
US1206-33CD US1206-33CY
NA US1207-18CM
NA US1207-25CM
NA US1207-33CM
NA US1208CM
NA US1209CM
8 PIN PLASTIC
SOIC Power
US1206-18CM
US1206-25CM
US1206-33CM
US1207CS
US1207CS
US1207CS
US1208CS
US1209CS
Voltage Pin Functions
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
Adj
Adj
Vin, Vout, GND
Vin, Vout, GND
Vin, Vout, GND
Vin, Vout, GND, Enable, Flag
Vin, Vout, GND, Enable, Flag
Vin, Vout, GND, Enable, Flag
Vin, Vout, GND, Flag, Adj
Vin, Vout, GND, Adj, Enable
Rev. 1.1
6/26/00
2-1






US1206-33CM Datasheet, Funktion
US1206/1207/1208/1209
TYPICAL APPLICATION
US1208
Adj 5
Vout 4
Gnd 3
Vin 2
Flag 1
Vin
C1
R1
R2
R3
Vout
C2
1208app1-1.1
Error Flag
Vo= 1.24 X (1 + R1/R2)
Pin numbers in this
schematic apply only
to TO263(M) package.
Figure 2- Typical application of US1208 in 3.3V to 2.5V regulator
Ref Desig
C1
C2
R1
R2
Description
Capacitor
Capacitor
Resistor
Resistor
Qty Part #
1 10uF, Tantalum
1 10uF, Tantalum
1 127, 1%
1 124, 1%
Manuf
AVX
AVX
2-6
Rev. 1.1
6/26/00

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