IRU1120 查看數據表（PDF） - International Rectifier
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IRU1120 Datasheet PDF : 9 Pages
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IRU1120
PARAMETER
SYM
TEST CONDITION
Dropout Voltage
VDO5 Note 2, Io=1.5A, VCTRL=VIN for the
following:
08C< TJ<1258C
-408C< TJ<1258C
Dropout Voltage
VDO6 Note 2, Io=2A, VCTRL=VIN for the
following:
08C< TJ<1258C
-408C< TJ<1258C
Current Limit
IOL DVO1=10% Below Regulation
Minimum Load Current
Thermal Regulation
IO(min) Note 3, 5
RegTHERM Note 5, 30ms pulse, Io=IFL
Ripple Rejection (Vcc to Output) PSRR Note 5, 100Hz<f<100KHz, Io=20mA
Temperature Stability
Long Term Stability
StabTEMP Note 4, 5, Io=10mA
StabLONG Note 5
RMS Output Noise
VN Note 5, 10Hz<f<10KHz
Vcc Quiescent Current
IQ1 Io=0mA
MIN
2.3
TYP MAX UNITS
1.2 1.35 V
1.3
1.35 1.5
V
1.44
3
4
A
1
5 mA
0.1
%/W
32
dB
0.5
%Vo
0.3
%Vo
0.003
%Vo
1
3 mA
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 VIN and VOUT required to main-
tain regulation at VOUT. 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.
PIN DESCRIPTIONS
PIN #
1
2
3
4
5
PIN SYMBOL
VCTRL
VIN
Gnd
VOUT
VADJ
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 VIN. A 1mF high frequency capacitor
is connected from this pin to VIN 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 VOUT 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 VOUT pin and to ground sets the output voltage. See
application section for divider setting recommendations and a circuit example.
Rev. 1.3
08/20/02
www.irf.com
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