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IRU1237SCCP-IRU1237SCCPTR
Three Integrated Fixed Output LDO Linear Regulator in a ULTRA THIN-PAK 7-Leads package
International
TOR Rectifier
FEATU RES
Stable with Ceramic Capacitor
Fixed 8V, 3.3V and 2.6V
Fast Transient Response
Output Current Limiting for each outputs
Built-ln Thermal Shutdown
APPLICATIONS
D High ENciency Linear Regulator
Hard Disk Drive
Multi-Outputs Applications
Data Sheet No. PD94581
IRU1237SC
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
powerthe read channel and integrated controller/wp. 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 iqu 2.6V/1.2A
VDD - _T_ x121/
V8 Tc"
|RU1237SC -f- Ni 8V / 200mA
Gnde I luF
Vcc I 5V
V33 Ce'
=u)u,, / 3.3V/1.2A
Gnd26/33 1:
Figure 1 - Typical application of IRU1237SC.
PACKAGE ORDER INFORMATION
Rev. 1.2
07l14l03
TJ (°C) 7-PIN PLASTIC PACKAGE
Ultra Thin-Pak"' (P) MARKING
0 To 150 |RU1237SCCP US1237SCCP
IRU1237SC
International
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vcc) .............................
Input Voltage (V oo) .............................
Operating Junction Temperature Range .....................
Operating Ambient Temperature Range .....................
Storage Temperature Range ..............
ESD Capability (Human Body Model) .
...................... 18V
...................... 18V
0°C To 150°C
0°C To 70°C
-65°C To +150°C
PACKAGE INFORMATION
7-PIN ULTRA THIN-PAKm (P)
Cl Vas
Cl V50
I Gnde
Cl Vas
Cl Gndzms
ANOJ-bc'lmfl
6JA=3O°CNV for 1"sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these spetyfcations apply over Vcc=5V, Voo=12V, ClN=CouT=0.1wF(X7R), T--0 to
125°C. Typical values refer to TJ=25°C. IFL1=1.2A, |FL2 =1.2A and IFL3 =0.2A.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Output Voltage #1 V01 Over all operating conditions 2.522 2.60 2.678 V
Output Voltage #1 V01 OV
Output Voltage #2 V02 Over all operating conditions 3.20 3.30 3.40 V
Output Voltage #2 V02 0VOutput Voltage #3 V03 Over all operating conditions 7.76 8.00 8.24 V
Line Regulation RegLINE lo=10mA, Vcc t 5%, VDD t 10% 0.2 %V0
Load Regulation RegLOAD Note 1, 10mA < lo < IFL 0.4 %V0
Dropout Voltage (Output #1) V001 Note 2, |O1=|FL1 1.3 1.7 V
Dropout Voltage (Output #2) Vooz Note 2, '02=|FL2 1.1 1.3 V
Dropout Voltage (Output #3) V003 Note 3, ko3--rcs 2.0 2.2 V
Transient Response tTR Note 3 and 7 1.0 us
Current Limit (Output #1) |0L1 AVo1=125mV 1.50 1.65 2.50 A
Current Limit (Output #2) |OL2 AVoz=165mV 1.50 1.65 2.50 A
Current Limit (Output #3) kt:, AVos=400mV 0.25 0.30 0.50 A
Min Load Current (Output #1) LO1(M|N) Note 4 and 7 0 mA
Min Load Current (Output #2) L02(MAX) Note 4 and 7 0 mA
Min Load Current (Output #3) LO3(MAX) Note 4 and 7 0 mA
Output Capacitor Co Note 5 and 7 0.1 33 plF
Input Capacitor Cm Note 7 0.1 p.F
Thermal Regulation RegTHERM Note 7, 30ms pulse, b=IFL 0.1 0.3 %/W
Rev. 1.2
07I14I03
