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International Rectifier Electronic Components Datasheet

1237SC Datasheet

IRU1237SC

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Data Sheet No. PD94581
IRU1237SC
FEATURES
Stable with Ceramic Capacitor
Fixed 8V, 3.3V and 2.6V
Fast Transient Response
Output Current Limiting for each outputs
Built-In Thermal Shutdown
APPLICATIONS
Hard Disk Drive
Multi-Outputs Applications
High Efficiency Linear Regulator
THREE INTEGRATED, FIXED OUTPUT
LINEAR VOLTAGE REGULATORS
PRELIMINARY DATA SHEET
DESCRIPTION
The IRU1237SC voltage regulator solution contains three
integrated, fixed, linear voltage regulators in one 7-pin
surface mount package. The first is a 2.6V regulator to
power the read channel and integrated controller/mP. The
second is a 3.3V regulator to power the controller I/O
and memory chips requiring 3.3V. The last is an 8V regu-
lator to power the preamp chip. The bandgap reference,
the 8V ground, and the substrate are all tied to a com-
mon ground pin, while the 2.6V and 3.3V ground is tied
to a separate ground pin. This grounding scheme allows
for improved noise isolation between the 8V regulator
and the 2.6V and 3.3V regulators.
The 2.6V and 3.3V regulators shall each be capable of
1.2A continuous for a 5.25V input. The 8V regulator shall
be capable of 0.2A continuous for a 13.2V input.
TYPICAL APPLICATION
www.DataSheet4U.com
V26
VDD
IRU1237SC V8
Gnd8
VCC
V33
Gnd26/33
10uF
1uF
1uF
2.6V / 1.2A
12V
8V / 200mA
10uF
10uF
5V
3.3V / 1.2A
Figure 1 - Typical application of IRU1237SC.
PACKAGE ORDER INFORMATION
TJ (°C)
0 To 150
7-PIN PLASTIC
Ultra Thin-PakTM (P)
IRU1237SCCP
PACKAGE
MARKING
US1237SCCP
Rev. 1.2
07/14/03
www.irf.com
1


International Rectifier Electronic Components Datasheet

1237SC Datasheet

IRU1237SC

No Preview Available !

IRU1237SC
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VCC) ................................................... 18V
Input Voltage (VDD) ................................................... 18V
Operating Junction Temperature Range ..................... 0°C To 150°C
Operating Ambient Temperature Range ..................... 0°C To 70°C
Storage Temperature Range ...................................... -65°C To +150°C
ESD Capability (Human Body Model) ........................ 2000V
PACKAGE INFORMATION
7-PIN ULTRA THIN-PAKTM (P)
7 V26
6 VDD
5 V8
4 Gnd8
3 Vcc
2 V33
1 Gnd 26/33
θJA=30°C/W for 1"sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apwpwwly.DatoaSvheeet4rU.cVomCC=5V, VDD=12V, CIN=COUT=0.1mF(X7R), TJ=0 to
125°C. Typical values refer to TJ=25°C. IFL1=1.2A, IFL2 =1.2A and IFL3 =0.2A.
PARAMETER
SYM
TEST CONDITION
Output Voltage #1
VO1 Over all operating conditions
Output Voltage #1
VO1 0V<VDD<10.8V, IO1=0.5A
Output Voltage #2
VO2 Over all operating conditions
Output Voltage #2
VO2 0V<VDD<10.8V, IO1=0.5A
Output Voltage #3
VO3 Over all operating conditions
Line Regulation
RegLINE IO=10mA, VCC65%, VDD610%
Load Regulation
RegLOAD Note 1, 10mA < IO < IFL
Dropout Voltage (Output #1) VDO1 Note 2, IO1=IFL1
Dropout Voltage (Output #2) VDO2 Note 2, IO2=IFL2
Dropout Voltage (Output #3) VDO3 Note 3, IO3=IFL3
Transient Response
tTR Note 3 and 7
Current Limit (Output #1)
IOL1 DVO1=125mV
Current Limit (Output #2)
IOL2 DVO2=165mV
Current Limit (Output #3)
IOL3 DVO3=400mV
Min Load Current (Output #1) LO1(MIN) Note 4 and 7
Min Load Current (Output #2) LO2(MAX) Note 4 and 7
Min Load Current (Output #3) LO3(MAX) Note 4 and 7
Output Capacitor
CO Note 5 and 7
Input Capacitor
CIN Note 7
Thermal Regulation
RegTHERM Note 7, 30ms pulse, IO=IFL
MIN
2.522
2.20
3.20
2.90
7.76
1.50
1.50
0.25
0.1
0.1
TYP
2.60
2.60
3.30
3.30
8.00
0.2
0.4
1.3
1.1
2.0
1.0
1.65
1.65
0.30
0.1
MAX
2.678
2.65
3.40
3.40
8.24
1.7
1.3
2.2
2.50
2.50
0.50
0
0
0
33
0.3
UNITS
V
V
V
V
V
%Vo
%Vo
V
V
V
ms
A
A
A
mA
mA
mA
mF
mF
%/W
2 www.irf.com
Rev. 1.2
07/14/03


Part Number 1237SC
Description IRU1237SC
Maker International Rectifier
Total Page 7 Pages
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