SC1183CSW Semtech Corporation, SC1183CSW Datasheet
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SC1183CSW
Manufacturer Part Number
SC1183CSW
Description
Manufacturer
Semtech Corporation
Specifications of SC1183CSW
Case
SOP
Date_code
2001
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SC1183CSW
Manufacturer:
NXP
Quantity:
2 500
August 25, 1998
DESCRIPTION
The SC1182/3 combines a synchronous voltage mode
controller with two low-dropout linear regulators
providing most of the circuitry necessary to implement
three DC/DC converters for powering advanced
microprocessors such as Pentium
Deschutes.
The SC1182/3 switching section features an integrat-
ed 5 bit D/A converter, pulse by pulse current limiting,
integrated power good signaling, and logic compatible
shutdown. The SC1182/3 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 compo-
nents.
The SC1182/3 linear sections are low dropout regula-
tors. The SC1182 supplies 1.5V for GTL bus and 2.5V
for non-GTL I/O.
For the SC1183 both LDO’s are adjustable.
PIN CONFIGURATION
© 1998 SEMTECH CORP.
PWRGOOD
PGNDH
PGNDL
GATE1
LDOS1
LDOS2
AGND
OVP
VCC
CS+
CS-
DH
(24 Pin SOIC)
10
11
12
Top View
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
GATE2
LDOV
VID0
VID1
VID2
VID3
VID4
VOSENSE
EN
BSTH
BSTL
DL
®
II (Klamath) or
BLOCK DIAGRAM
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
REF.
CONTROLLER
2.5V/ADJ.
FET
FEATURES
APPLICATIONS
ORDERING INFORMATION
Part Number
SC1182CSW
SC1183CSW
Note:
(1) Add suffix ‘TR’ for tape and reel.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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
ments
1.5V, 2.5V or Adj. @ 1% for linear section
Pentium
Flexible motherboards
1.3V to 3.5V microprocessor supplies
Programmable triple power supplies
1.265V
LDOV
REF.
®
(1)
ll or Deschutes microprocessor supplies
Pentium is a registered trademark of Intel Corporation
Package
SO-24
SO-24
CONTROLLER
1.5V/ADJ.
FET
1.5V/2.5V 0° to 125°C
Voltage
®
Linear
Adj.
ll VRM8.1 require-
SC1182/3
0° to 125°C
Range (T
Temp.
J
1
)