IRU1237SC IRF [International Rectifier], IRU1237SC Datasheet

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IRU1237SC

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

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Part Number
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Part Number:
IRU1237SC
Manufacturer:
UNISEM
Quantity:
2 462
FEATURES
APPLICATIONS
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
Rev. 1.2
07/14/03
Stable with Ceramic Capacitor
Fixed 8V, 3.3V and 2.6V
Fast Transient Response
Output Current Limiting for each outputs
Built-In Thermal Shutdown
Hard Disk Drive
Multi-Outputs Applications
High Efficiency Linear Regulator
IRU1237SC
0 To 150
TJ (°C)
Figure 1 - Typical application of IRU1237SC.
Gnd
Ultra Thin-Pak
Gnd
26/33
V
V
7-PIN PLASTIC
IRU1237SCCP
V
V
DD
V
CC
26
33
8
8
THREE INTEGRATED, FIXED OUTPUT
www.irf.com
TM
(P)
LINEAR VOLTAGE REGULATORS
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.
10uF
10uF
1uF
US1237SCCP
MARKING
PACKAGE
10uF
1uF
PRELIMINARY DATA SHEET
2.6V / 1.2A
3.3V / 1.2A
8V / 200mA
5V
12V
Data Sheet No. PD94581
IRU1237SC
1

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IRU1237SC Summary of contents

Page 1

... Output Current Limiting for each outputs Built-In Thermal Shutdown APPLICATIONS Hard Disk Drive Multi-Outputs Applications High Efficiency Linear Regulator TYPICAL APPLICATION IRU1237SC Figure 1 - Typical application of IRU1237SC. PACKAGE ORDER INFORMATION TJ (° 150 Rev. 1.2 07/14/03 THREE INTEGRATED, FIXED OUTPUT LINEAR VOLTAGE REGULATORS DESCRIPTION ...

Page 2

... IRU1237SC ABSOLUTE MAXIMUM RATINGS Input Voltage (V ) ................................................... 18V CC Input Voltage (V ) ................................................... 18V DD Operating Junction Temperature Range ..................... Operating Ambient Temperature Range ..................... Storage Temperature Range ...................................... -65°C To +150°C ESD Capability (Human Body Model) ........................ PACKAGE INFORMATION TM 7-PIN ULTRA THIN-PAK ( Gnd ...

Page 3

... 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. www.irf.com IRU1237SC MIN TYP MAX UNITS / ...

Page 4

... IRU1237SC BLOCK DIAGRAM Pre-Driver Controller Vcc 3 Pre-Driver Controller Figure 2 - Simplified block diagram of the IRU1237SC. 4 Thermal Shutdown Bandgap Thermal Shutdown Thermal Shutdown www.irf.com Gnd 4 8 Gnd 1 26/ Rev. 1.2 07/14/03 ...

Page 5

... The dual inputs provide a low dropout voltage for V by biasing the base current to power NPN transistors. The IRU1237SC is designed to meet the fast current transient needs as well as an accurate initial voltage, thus reducing the overall system cost with the need for fewer number of output capacitors ...

Page 6

... IRU1237SC (P) Ultra Thin-Pak 7-Pin SYMBOL MIN MAX A 9.27 9.52 A1 8.89 9.14 B 7.87 8.13 C 1.78 2.03 D 0.63 0.79 E 0.25 NOM G 1.27 H 10.41 10.67 K 0.76 1.27 L 0.03 0.13 M 0.89 1.14 N 0.25 P 0.79 1. 5.59 NOM V 7.49 NOM NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. www.irf.com U V Rev. 1.2 07/14/03 ...

Page 7

... IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 Rev. 1.2 07/14/03 PIN PARTS COUNT PER TUBE Feed Direction Figure A Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 www.irf.com IRU1237SC PARTS T & R PER REEL Orientation 2500 Fig A TAC Fax: (310) 252-7903 7 ...

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