IRU1237SC Datasheet, PDF (1/7 Pages) International Rectifier – THREE INTEGRATED, FIXED OUTPUT LINEAR VOLTAGE REGULATORS

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
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-Pak^TM (P)
IRU1237SCCP
PACKAGE
MARKING
US1237SCCP
Rev. 1.2
07/14/03
www.irf.com
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