Data Sheet No. PD94581
IRU1237SC
THREE INTEGRATED, FIXED OUTPUT LINEAR VOLTAGE REGULATORS
PRELIMINARY DATA SHEET
FEATU...
Data Sheet No. PD94581
IRU1237SC
THREE INTEGRATED, FIXED OUTPUT LINEAR VOLTAGE
REGULATORS
PRELIMINARY DATA SHEET
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
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/ m P. The second is a 3.3V
regulator to power the controller I/O and memory chips requiring 3.3V. The last is an 8V
regulator to power the preamp chip. The bandgap reference, the 8V ground, and the substrate are all tied to a common 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.
APPLICATIONS
Hard Disk Drive Multi-Outputs Applications High Efficiency Linear
Regulator
TYPICAL APPLICATION
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V26 VDD
2.6V / 1.2A
10uF
12V
1uF
IRU1237SC
V8 Gnd8 VCC
10uF 1uF
8V / 200mA
5V 3.3V / 1.2A
V33 Gnd26/33
10uF
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
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