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SC1153 PDF даташит

Спецификация SC1153 изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS».

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Номер произв SC1153
Описание PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1153 Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
CONTROLLER FOR ADVANCED PROCESSORS
SC1153
PRELIMINARY - October 3, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1153 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
SC1153 is ideal for implementing DC/DC converters
needed to power advanced microprocessors, such as
Pentium® lll, in both single and multiple processor con-
figurations. Internal level-shift, high-side drive circuitry,
and preset shoot-thru control, allows for use of inex-
pensive n-channel power switches.
SC1153 features include an integrated 5-bit VID DAC,
temperature compensated voltage reference, triangle
wave oscillator, current limit comparator, frequency
shift over-current protection, and an accessible, inter-
nally compensated error amplifier. Power good signal-
ing, logic compatible shutdown, and over voltage pro-
tection are also provided.
The SC1153 operates at a fixed 200KHz, providing an
optimum compromise between efficiency, external
component size, and cost.
FEATURES
= Low cost / full featured
= Synchronous operation
= 5 Bit VID programmable output
= On-chip power good and OVP functions
= Designed to meet Intel VRM 8.4 (Pentium® IlI)
= 1.3V to 3.5V Range, 1% tolerance
APPLICATIONS
= Pentium® IlI Core Supply
= Multiple Microprocessor Supplies
= Voltage Regulator Modules (VRM)
= Programmable Power Supplies
= High Efficiency DC/DC Conversion
ORDERING INFORMATION
DEVICE(1)
PACKAGE TEMP. RANGE (TJ)
SC1153CSW.TR SO-20
0 - 125°C
Note:
(1) Only available in tape and reel packaging. A reel
contains 1000 devices.
PIN CONFIGURATION
BLOCK DIAGRAM
Top View
(20-Pin SOIC)
VCC CS- CS+
SHUTDOWN
1.25V REF
VID4
VID3
VID2
VID1
VID0
D/A
VOSENSE
PWRGOOD
OPEN COLLECTORS
VCC
70mV
CURRENT LIMIT
OSCILLATOR
200kHz
R
Q
S
ERROR
AMP
OVP
GND
UPPER FET
LEVEL SHIFT
AND DRIVE
BSTH
DH
PGNDH
SHOOT-THRU
CONTROL
SYNCHRONOUS
FET DRIVE
BSTL
DL
PGNDL
© 2000 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1153 Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
CONTROLLER FOR ADVANCED PROCESSORS
SC1153
PRELIMINARY - October 3, 2000
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum
VCC to GND
PGND to GND
VIN -0.3 to 7
±1
BST to GND
-0.3 to 15
Thermal Resistance
Junction to Case
θJC
30
Thermal Resistance
Junction to Ambient
θJA
90
Operating
Temperature Range
TA
0 to 70
Storage
Temperature Range
TSTG
-65 to +150
Lead Temperature
(Soldering) 10 sec
TLEAD
300
Units
V
V
V
°C/W
°C/W
°C
°C
°C
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
IO = 2A(1)
See Output Voltage Table.
Supply Voltage
VCC
4.2 7 V
Supply Current
Load Regulation
Line Regulation
VCC = 5.0
IO = 0.3A to 15A(1)
All VID codes(1)
5 mA
1%
0.5 %
Gain (AOL)
Current Limit Voltage
VOSENSE to VO
35 dB
60 70 80 mV
Oscillator Frequency
180 200 220 kHz
Oscillator Max Duty Cycle
90 95
%
DH Sink/Source Current
DL Sink/Source Current
OVP Threshold Voltage
BSTH - DH = 4.5V, DH - PGNDH = 2V
BSTL - DL = 4.5V, DL - PGNDL = 2V
1
1
120
A
A
%
OVP Source Current
Power Good Threshold
Voltage
VOVP = 3V
10 mA
90 110 %
Dead Time
50 100
ns
NOTE:
(1) Specification refers to application circuit (Figure 1.).
(2) This part 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 !

SC1153 Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
CONTROLLER FOR ADVANCED PROCESSORS
SC1153
PRELIMINARY - October 3, 2000
PIN DESCRIPTION
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin Name
GND
VCC
OVP
PWRGOOD(1)
CS(-)
CS(+)
PGNDH
DH
NC
PGNDL
DL
BSTL
BSTH
SHUTDOWN(1)
VOSENSE
VID4(1)
VID3(1)
VID2(1)
VID1(1)
VID0(1)
Pin Function
Small Signal Analog and Digital Ground
Chip Supply Voltage
High Signal Out if VO > Setpoint + 20%
Open collector logic output, high if VO within 10% of setpoint
Current Sense Input (negative)
Current Sense Input (positive)
Power Ground for High Side Switch
High Side Driver Output
Not Connected
Power Ground for Low Side Switch
Low Side Driver Output
Vcc for Low Side Driver (Boost)
Vcc for High Side Driver (Boost)
Logic Low shuts down the converter
Top end of internal feedback chain
Programming Input (MSB)
Programming Input
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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