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PDF IRU1208 Data sheet ( Hoja de datos )
| Número de pieza | IRU1208 | |
| Descripción | (IRU1206 - IRU1209) 1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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Data Sheet No. PD94134
IRU1206 / IRU1207 / IRU1208 / IRU1209
1A VERY LOW DROPOUT POSITIVE
FIXED AND ADJUSTABLE REGULATORS
FEATURES
DESCRIPTION
Low Dropout Voltage (500mV at 1A)
1% Voltage Reference Accuracy
Low Ground Current
1mA Maximum Quiescent Current in Shutdown
(IRU1207, IRU1208)
Fast Transient Response
Current Limit and Thermal Shutdown
Error Flag Signal for Output out of Regulation
(IRU1207, IRU1208)
APPLICATIONS
2.5V Supply from 3.3V Input for the new
generation of Logic ICs
Computer Mother Board, Add-On Cards
High Efficiency Post Regulator in Switch Mode
Power Supply (SMPS)
The IRU1206 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
only available and the dropout voltage is less than 1V,
exceeding the minimum dropout characteristics of NPN/
PNP hybrid regulators. One common application of these
regulators is 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: micro-power shut-
down capability and output UVLO detection where Flag
pin is switched low when output is below 5% of its nomi-
nal point.
TYPICAL APPLICATION
3VOUT
IRU1206-
XX Gnd 2
VOUT
C2
VIN 1
VIN
C1
Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package.
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
2-PIN TO-252
3-PIN
(D-PAK)
SOT-223 (Y)
IRU1206-18CD IRU1206-18CY
IRU1206-25CD IRU1206-25CY
IRU1206-33CD IRU1206-33CY
NA NA
NA NA
NA NA
NA NA
NA NA
8-PIN PLASTIC
SOIC (S)
NA
NA
NA
IRU1207-18CS
IRU1207-25CS
IRU1207-33CS
IRU1208CS
IRU1209CS
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, Enable, Adj
Rev. 2.3
08/02/02
www.irf.com
1
1 page  
IRU1206 / IRU1207 / IRU1208 / IRU1209
TYPICAL APPLICATION
5 Gnd
Adj 4
6 Gnd
VOUT 3
IRU1208
7 Gnd
VIN 2
8 Gnd
Flag 1
VIN
C1
R1
R2
R3
VOUT
C2
Error Flag
( )Vo = 1.24 3
R1
1 + R2
Figure 4 - Typical application of IRU1208 in 3.3V to 2.5V regulator.
Ref Desig
C1
C2
R1
R2
R3
Description
Capacitor
Capacitor
Resistor
Resistor
Resistor
Qty Part #
1 10mF, Tantalum
1 10mF, Tantalum
1 127V, 1%
1 124V, 1%
1 10KV, 5%
Manuf
AVX
AVX
Rev. 2.3
08/02/02
www.irf.com
5
5 Page 
D
B
e
e1
B1
IRU1206 / IRU1207 / IRU1208 / IRU1209
(Y) SOT-223 Package
3-Pin
EH
S
SYMBOL
A
A1
B
B1
C
D
E
e
e1
H
Q
Q1
Q2
S
T
MIN
1.498
0.02
2.895
0.637
0.239
6.299
3.30
2.209
4.496
6.70
08
78
78
0.838
1.092
MAX
1.702
0.11
3.15
0.85
0.381
6.706
3.708
2.953
4.699
7.30
108
168
168
1.05
1.30
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
Q1
TA
A1
Q
C
Q2
Rev. 2.3
08/02/02
www.irf.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet IRU1208.PDF ] | |
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