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IRU1209 Datasheet

  • IRU1209

  • 1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS

  • 88.17KB

  • 12頁

  • IRF

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Data Sheet No. PD94134
IRU1206 / IRU1207 / IRU1208 / IRU1209
1A VERY LOW DROPOUT POSITIVE
FIXED AND ADJUSTABLE REGULATORS
DESCRIPTION
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.
FEATURES
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)
TYPICAL APPLICATION
V
OUT
3
C2
V
OUT
IRU1206-
XX
Gnd
2
V
IN
1
V
IN
C1
Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package.
PACKAGE ORDER INFORMATION
T
J
(擄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
Rev. 2.3
08/02/02
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
www.irf.com
VOLTAGE
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
Adj
Adj
PIN FUNCTIONS
V
IN
, V
OUT
, Gnd
V
IN
, V
OUT
, Gnd
V
IN
, V
OUT
, Gnd
V
IN
, V
OUT
, Gnd, Enable, Flag
V
IN
, V
OUT
, Gnd, Enable, Flag
V
IN
, V
OUT
, Gnd, Enable, Flag
V
IN
, V
OUT
, Gnd, Flag, Adj
V
IN
, V
OUT
, Gnd, Enable, Adj
1

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