sc1163 Semtech Corporation, sc1163 Datasheet
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sc1163
Manufacturer Part Number
sc1163
Description
Converter With Low Dropout Regulator Controller
Manufacturer
Semtech Corporation
Datasheet
1.SC1163.pdf
(12 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
sc1163CS
Manufacturer:
SEMTECH
Quantity:
117
October 25, 1999
DESCRIPTION
The SC1162/3 combines a synchronous voltage mode
controller with a low-dropout linear regulator providing
most of the circuitry necessary to implement two DC/
DC converters for powering advanced microprocessors
such as Pentium
The SC1162/3 switching section features an integrated
5 bit D/A converter, pulse by pulse current limiting,
integrated power good signaling, and logic compatible
shutdown. The SC1162/3 switching section operates at
a fixed frequency of 200kHz, providing an optimum
compromise between size, efficiency and cost in the
intended application areas. The integrated D/A con-
verter provides programmability of output voltage from
2.0V to 3.5V in 100mV increments and 1.30V to 2.05V
in 50mV increments with no external components.
The SC1162/3 linear section is a high performance
positive voltage regulator design for either the GTL bus
supply at 1.5V (SC1162) or an adjustable output
(SC1163).
The output of the linear regulator can provide up to 5A
or more with the appropriate external MOSFET.
PIN CONFIGURATION
© 1999 SEMTECH CORP.
(24 Pin SOIC)
Top View
®
II.
BLOCK DIAGRAM
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER WITH LOW DROPOUT
REGULATOR CONTROLLER
PWRGOOD
VOSENSE
VID4
VID3
VID2
VID1
VID0
OVP
VCC
OPEN
COLLECTORS
1.25 REF
SHUT-
D/A &
DOWN
LOGIC
FEATURES
APPLICATIONS
ORDERING INFORMATION
Part Number
SC1162CSW
SC1163CSW
Note:
(1) Add suffix ‘TR’ for tape and reel.
VCC
VCC
652 MITCHELL ROAD NEWBURY PARK CA 91320
AGND
Synchronous design, enables no heatsink solution
95% efficiency (switching section)
5 bit DAC for output programmability
On chip power good function
Designed for Intel Pentium
1.5V or Adj. @ 1% for linear section
1.300V-2.05V ±1.5%; 2.100V-3.500V ±2%
Pentium
Flexible motherboards
1.3V to 3.5V microprocessor supplies
Programmable dual power supplies
CS-
70mV
CS+
OSCILLATOR
AMP
ERROR
1.265V
REF
LDOV
®
CURRENT LIMIT
(1)
ll or Deschutes microprocessor supplies
Pentium is a registered trademark of Intel Corporation
Package
SO-24
SO-24
R
S
Q
CONTROLLER
FET
EN
Voltage
®
Linear
1.5V
II requirements
Adj.
GATE
MOSFET DRIVER
SYNCHRONOUS
AND HIGH SIDE
MOSFET DRIVE
LEVEL SHIFT
CONTROL
LDOS
SHOOT-
THRU
SC1162/3
0° t o 125°C
0° t o 125°C
Range (T
Temp.
BSTH
DH
PGNDH
BSTL
DL
PGNDL
J
1
)