IRU1237SC IRF [International Rectifier], IRU1237SC Datasheet - Page 3

• Manufacturer Part Number: IRU1237SC
• Description: THREE INTEGRATED, FIXED OUTPUT LINEAR VOLTAGE REGULATORS
• Manufacturer: IRF [International Rectifier]

PARAMETER
Ripple Rejection
(V
Ripple Rejection
(V
Ripple Rejection
(V
T
Temperature Stability
Long Term Stability
RMS Output Noise
V
V
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
tain regulation at V
voltage drops 1% below its nominal value.
Note 3: Transient response is defined with a step change
in load from 10mA to I
until the output voltage reaches its minimum value.
PIN DESCRIPTIONS
PIN#
Rev. 1.2
07/14/03
J
CC
DD
1,4
CC
CC
DD
Thermal Shutdown
2
3
5
6
7
Quiescent current
Quiescent current
to Output #1)
to Output #2)
to Output #3)
Gnd
PIN SYMBOL
26/33
V
V
V
V
V
CC
DD
33
26
, Gnd
8
OUT
FL
8
. It is measured when the output
/2, as the time from the load step
These pins are connected to ground. It is also the tab of the device.
Output #1. Fixed regulator output (3.3V).
Positive unregulated supply input for the regulator. This pin must always be higher than
both V
properly. Bypass to ground with low ESR and ESL capacitance.
Output #3. Fixed regulator output (8V).
Input voltage to supply the base current for the pass transistor for both regulators.
Output #2. Fixed regulator output (2.6V).
PIN DESCRIPTION
IN
and V
Stab
Stab
PSRR
PSRR
PSRR
T
OUT
SYM
THERM
V
I
I
Q1
Q2
OUT
N
TEMP
LONG
pins by the amount of the dropout voltage in order for the device to regulate
1
2
3
required to main-
Note 7, 100Hz<f<100KHz, I
Note 7, 100Hz<f<100KHz, I
Note 7, 100Hz<f<100KHz, I
Note 7
Note 6 and 7, I
Note 7, T
Note 7, 10Hz<f<10KHz
I
I
O1
O1
=I
=I
O2
O2
=I
=I
TEST CONDITION
O3
O3
J
=0
=0
=1258C, 1000Hrs
www.irf.com
O
=10mA
Note 4: 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 5: The regulator shall withstand 100,000 reverse
bias discharges of the maximum output capacitance,
with no degradation, when the input voltage is switched
to ground in 1ms.
Note 6: Temperature stability is the change in output
from nominal over the operating temperature range.
Note 7: Guaranteed by design, but not tested in produc-
tion.
O
O
O
=I
=I
=I
FL1
FL2
FL3
/10
/10
/10
MIN
30
30
40
0.003
TYP
150
0.5
0.3
IRU1237SC
40
40
50
12
4
MAX
20
8
UNITS
%Vo
%Vo
%Vo
mA
mA
dB
dB
dB
8C
3