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SC1158CS PDF даташит

Спецификация SC1158CS изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS».

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Номер произв SC1158CS
Описание PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1158CS Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
SC1158
CONTROLLER FOR ADVANCED PROCESSORS
Preliminary - August 7, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1158 is a low-cost, full featured, synchronous
voltage-mode controller designed for use in single
ended power supply applications where efficiency is of
primary concern. Synchronous operation allows for the
elimination of heat sinks in many applications. The
SC1158 is ideal for implementing DC/DC converters
needed to power advanced microprocessors such as
Pentium® ll and K6-2. Internal level-shift, high-side
drive circuitry, and preset shoot-thru control, allows for
use of inexpensive N-channel power switches.
SC1158 features include an integrated 4-bit VID DAC,
temperature compensated voltage reference, triangle
wave oscillator, current limit comparator, frequency
shift over-current protection, and an internally compen-
sated error amplifier.
The SC1158 operates at a fixed 140KHz, providing an
optimum compromise between efficiency, external
component size, and cost.
PIN CONFIGURATION
FEATURES
= Low cost / full featured
= Synchronous operation
= 4 Bit VID DAC programmable output
(1% tolerance)
= Meets Intel VRM8.2 (Pentium® II) high range
= 1.5% Reference
APPLICATIONS
= Pentium® II, K6-2 Core Supplies
= Multiple Microprocessor Supplies
= Voltage Regulator Modules (VRM)
= Programmable Power Supplies
= High Efficiency DC/DC Conversion
ORDERING INFORMATION
DEVICE(1) PACKAGE(2)
SC1158CS.TR SO-16NB
TEMP. RANGE (TJ)
0 - 125°C
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
(2) “NB” indicates 150 MIL body.
BLOCK DIAGRAM
Top View
(16-Pin SOIC)
REF
VID3
VID2
VID1
VID0
VOSENSE
GND
VCC
CS- CS+
SHUTDOWN
REF
D/A
70mV
CURRENT
LIMIT
+
-
+
-
ERROR
AMP
-
+
LEVEL SHIFT AND
HIGH SIDE DRIVE
OSCILLATOR
R
Q
S
SHOOT-THRU
CONTROL
SYNCHRONOUS
MOSFET DRIVE
BSTH
DH
BSTL
DL
PGND
© 2000 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1158CS Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
SC1158
CONTROLLER FOR ADVANCED PROCESSORS
Preliminary - August 7, 2000
ABSOLUTE MAXIMUM RATINGS
Parameter
VCC to GND
PGND to GND
BST to GND
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 sec
ESD Rating (Human Body Model)
Symbol
VIN
θJC
θJA
TA
TSTG
TLEAD
ESD
Maximum
-0.3 to 7
±1
-0.3 to 15
30
130
0 to 70
-65 to +150
300
1.5
Units
V
V
V
°C/W
°C/W
°C
°C
°C
kV
ELECTRICAL CHARACTERISTICS
Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; FB = VO; 0mV < (CS(+) - CS(-)) < 60mV; TJ = 25oC
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Output Voltage
See Table 1.
Supply Voltage
Supply Current
Load Regulation
Line Regulation
VCC
VCC = 5.0
IO = 0.3A to 15A(1)
All VID codes(1)
4.5
8
1
+0.15
7
15
V
mA
%
%
Gain (AOL)
Current Limit Voltage
VOSENSE to VO
35 dB
60 70 80 mV
Oscillator Frequency
125 140 155 kHz
Buffered Reference Voltage IREF =1mA
Oscillator Max Duty Cycle
1.25
90 95
V
%
DH Sink/Source Current
DL Sink/Source Current
Dead Time
BSTH - DH = 4.5V, DH - PGNDH = 3V
BSTL - DL = 4.5V, DL - PGNDL = 3V
1
1
50
100
A
A
ns
VID Pin Source current
VIDx < 2.4V
30 100
uA
NOTE:
(1) Specification refers to application circuit (Figure 1.).
(2) This device is ESD sensitive. Use of standard ESD handling precautions is required.
© 2000 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1158CS Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
SC1158
CONTROLLER FOR ADVANCED PROCESSORS
Preliminary - August 7, 2000
PIN DESCRIPTION
Pin #
1
2
3
4
5
6
Pin Name
GND
REF
VCC
CS(-)
CS(+)
PGND
Pin Function
Small Signal Analog and Digital Ground
Buffered Reference output
Chip Supply Voltage
Current Sense Input (negative)
Current Sense Input (positive)
Power Ground for High and Low Side Drivers
7 DH
High Side Driver Output
8 DL
Low Side Driver Output
9 BSTL
10 BSTH
11 SHUTDOWN
12 VOSENSE
13 VID3(1)
14 VID2(1)
15 VID1(1)
16 VID0(1)
Vcc for Low Side Driver (Boost)
Vcc for High Side Driver (Boost)
Logic Low shuts down the converter; High or open for normal operation.
Top end of internal feedback chain
Programming Input (MSB)
Programming Input
Programming Input
Programming Input (LSB)
NOTE:
(1) All logic level inputs and outputs are open collector TTL compatible.
PIN CONFIGURATION
© 2000 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320










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Номер в каталогеОписаниеПроизводители
SC1158CSPROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORSSemtech Corporation
Semtech Corporation
SC1158CS.TRPROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORSSemtech Corporation
Semtech Corporation

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