SC1154CSW

Manufacturer Part NumberSC1154CSW
ManufacturerSemtech Corporation
SC1154CSW datasheet
 
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
Page 1/18

Download datasheet (369Kb)Embed
Next
PRELIMINARY - March 1, 2000
DESCRIPTION
The SC1154 is a synchronous-buck switch-mode con-
troller designed for use in single ended power supply
applications where efficiency is the primary concern.
The controller is a hysteretic type, with a user se-
lectable hysteresis. The SC1154 is ideal for imple-
menting DC/DC converters needed to power advanced
®
microprocessors such as Pentium
and multiple processor configurations. Inhibit, under-
voltage lockout and soft-start functions are included for
controlled power-up.
SC1154 features include an integrated 5 bit D/A con-
verter, temperature compensated voltage reference,
current limit comparator, over-current protection, and
an adaptive deadtime circuit to prevent shoot-through
of the power MOSFET during switching transitions.
Power good signaling, logic compatible shutdown, and
over-voltage protection are also provided. The inte-
grated D/A converter provides programmability of out-
put voltage from 2.0V to 3.5V in 100mV increments
and 1.3V to 2.05V in 50mV increments with no external
components.
The SC1154 high side driver can be configured as ei-
ther a grounded reference or as a floating bootstrap
driver. High and low side drivers have a peak current
rating of 2 amps.
PIN CONFIGURATION
Top View
(28-Pin SOIC)
© 2000 SEMTECH CORP.
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
FOR ADVANCED PROCESSORS
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
FEATURES
Programmable hysteresis
5 bit DAC programmable output (1.3V-3.5V)
On-chip power good and OVP functions
Designed to meet latest Intel specifications
Up to 95% efficiency
+ 1% tolerance over temperature
ll, in both single
APPLICATIONS
Server Systems and Workstations
Pentium
Multiple Microprocessor Supplies
Voltage Regulator Modules
ORDERING INFORMATION
(1)
DEVICE
SC1154CSW
Note:
(1) Add suffix ‘TR’ for tape and reel.
SIMPLIFIED BLOCK DIAGRAM
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1154
®
II Core Supply
PACKAGE
TEMP. RANGE (T
SO-28
0 - 125°C
Pentium is a registered trademark of Intel Corporation
)
J
1

SC1154CSW Summary of contents