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參數(shù)資料
| 型號： | IRU1120 |
| 廠商： | International Rectifier |
| 英文描述： | 2A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR |
| 中文描述： | 第2A低壓差型正，可調(diào)式穩(wěn)壓器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大?。?/td> | 61K |
| 代理商： | IRU1120 |
IRU1120
3
Rev. 1.3
08/20/02
www.irf.com
PIN # PIN SYMBOL
1
PIN DESCRIPTION
The control input pin of the regulator. This pin is connected to the 5V supply to provide
base current for the pass transistor of the regulator. This allows the regulator to have very
low dropout voltage, enabling use with low values of V
IN
. A 1
μ
F high frequency capacitor
is connected from this pin to V
IN
to ensure stability.
The power input pin of the regulator. A minimum of input capacitance must be connected
from this pin to ground to insure that the input voltage does not sag below the minimum
dropout voltage during the load transient response. This pin must always be higher than
the V
OUT
pin by the amount of dropout voltage (see data sheet) in order for the device to
regulate properly.
This pin is connected with ground. It is also the tab of the package.
The output of the regulator. A minimum of output capacitance must be connected from
this pin to ground to insure stability.
A resistor divider from this pin to the V
OUT
pin and to ground sets the output voltage. See
application section for divider setting recommendations and a circuit example.
PIN DESCRIPTIONS
2
3
4
5
V
CTRL
V
IN
Gnd
V
OUT
V
ADJ
Note 1:
Low duty cycle pulse testing with Kelvin con-
nections is required in order to maintain accurate data.
Note 2:
Dropout voltage is defined as the minimum dif-
ferential voltage between V
IN
and V
OUT
required to main-
tain regulation at V
OUT
. It is measured when the output
voltage drops 1% below its nominal value.
Note 3:
Minimum load current is defined as the mini-
mum current required at the output in order for the out-
put voltage to maintain regulation.
Note 4:
Temperature stability is the change in output
from nominal over the operating temperature range.
Note 5:
Guaranteed by design, but not tested in produc-
tion.
PARAMETER
Dropout Voltage
SYM
V
DO5
TEST CONDITION
Note 2, Io=1.5A, V
CTRL
=V
IN
for the
following:
0
8
C< T
J
<125
8
C
-40
8
C< T
J
<125
8
C
Note 2, Io=2A, V
CTRL
=V
IN
for the
following:
0
8
C< T
J
<125
8
C
-40
8
C< T
J
<125
8
C
V
O1
=10% Below Regulation
Note 3, 5
Note 5, 30ms pulse, Io=I
FL
Note 5, 100Hz<f<100KHz, Io=20mA
Note 4, 5, Io=10mA
Note 5
Note 5, 10Hz<f<10KHz
Io=0mA
MIN TYP MAX UNITS
Dropout Voltage
Current Limit
Minimum Load Current
Thermal Regulation
Ripple Rejection
(Vcc to Output)
Temperature Stability
Long Term Stability
RMS Output Noise
Vcc Quiescent Current
V
V
A
mA
%/W
dB
%Vo
%Vo
%Vo
mA
1.35
1.5
4
5
3
1.2
1.3
1.35
1.44
3
1
0.1
32
0.5
0.3
0.003
1
2.3
V
DO6
I
OL
I
O(min)
Reg
THERM
PSRR
Stab
TEMP
Stab
LONG
V
N
I
Q1
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