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SC1183 PDF даташит

Спецификация SC1183 изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER/ DUAL LOW DROPOUT REGULATOR CONTROLLER».

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Номер произв SC1183
Описание PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER/ DUAL LOW DROPOUT REGULATOR CONTROLLER
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1183 Даташит, Описание, Даташиты
August 25, 1998
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1182/3
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
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® II (Klamath) or
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.
FEATURES
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® ll VRM8.1 require-
ments
1.5V, 2.5V or Adj. @ 1% for linear section
APPLICATIONS
Pentium® ll or Deschutes microprocessor supplies
Flexible motherboards
1.3V to 3.5V microprocessor supplies
Programmable triple power supplies
ORDERING INFORMATION
Part Number(1) Package
Linear
Voltage
Temp.
Range (TJ)
SC1182CSW SO-24 1.5V/2.5V 0° to 125°C
SC1183CSW SO-24
Adj. 0° to 125°C
Note:
(1) Add suffix ‘TR’ for tape and reel.
PIN CONFIGURATION
BLOCK DIAGRAM
Top View
AGND
GATE1
LDOS1
LDOS2
VCC
OVP
PWRGOOD
CS-
CS+
PGNDH
DH
PGNDL
1
2
3
4
5
6
7
8
9
10
11
12
24 GATE2
23 LDOV
22 VID0
21 VID1
20 VID2
19 VID3
18 VID4
17 VOSENSE
16 EN
15 BSTH
14 BSTL
13 DL
(24 Pin SOIC)
© 1998 SEMTECH CORP.
REF.
FET
CONTROLLE R
2.5V/ADJ.
1.265V
REF.
LDOV
FET
CONTROLLE R
1.5V/ADJ.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1183 Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1182/3
August 25, 1998
ABSOLUTE MAXIMUM RATINGS
Parameter
VCC to GND
PGND to GND
BST to GND
Operating Temperature Range
Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 seconds
Thermal Impedance Junction to Ambient
Thermal Impedance Junction to Case
ELECTRICAL CHARACTERISTICS
Symbol
VIN
TA
TJ
TSTG
TL
θJA
θJC
Maximum
-0.3 to +7
±1
-0.3 to +15
0 to +70
0 to +125
-65 to +150
300
80
25
Units
V
V
V
°C
°C
°C
°C
°C/W
°C/W
Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = VO; 0mV < (CSp-CSm) < 60mV; LDOV = 11.4V to 12.6V; TA = 25°C
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Switching Section
Output Voltage
Supply Voltage
Supply Current
Load Regulation
Line Regulation
IO = 2A
VCC
VCC = 5.0
IO = 0.8A to 15A
See Note 1.
4.2 7
8 15
1
0.5
V
mA
%
%
Minimum operating voltage
4.2 V
Current Limit Voltage
60 70 80 mV
Oscillator Frequency
180 200 220 kHz
Oscillator Max Duty Cycle
90 95
%
Peak DH Sink/Source Current
BSTH-DH = 4.5V, DH-PGNDH = 2V 1
A
Peak DL Sink/Source Current
Output Voltage Tempco
BSTL-DL = 4.5V, DL-PGNDL = 2V
1A
30 100 ppm/oC
Gain (AOL)
OVP threshold voltage
VOSENSE to VO
35 dB
120 %
OVP source current
Power good threshold voltage
VOVP = 3.0V
10 mA
88 112 %
Dead time
50 100
ns
Linear Sections
Quiescent current
LDOV = 12V
5 mA
Output Voltage (LDO1 SC1182)
2.475 2.500 2.525 V
Output Voltage (LDO2 SC1182)
1.485 1.500 1.515 V
Reference Voltage (SC1183)
1.252 1.265 1.278 V
Feedback Pin Bias Current (SC1183)
10 uA
Gain (AOL)
Load Regulation
Line Regulation
LDOS (1,2) to GATE (1,2)
IO = 0 to 8A(2)
90
0.3
0.3
dB
%
%
Output Impedance
200
Notes: (1) See Output Voltage table.
(2) In application circuit.
2
© 1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1183 Даташит, Описание, Даташиты
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1182/3
August 25, 1998
PIN DESCRIPTION
Pin Pin Name
1 AGND
2 GATE1
3 LDOS1
4 LDOS2
5 VCC
6 OVP
7 PWRGOOD(1)
8 CS-
9 CS+
10 PGNDH
11 DH
12 PGNDL
13 DL
14 BSTL
15 BSTH
16 EN(1)
17 VOSENSE
18 VID4(1)
19 VID3(1)
20 VID2(1)
21 VID1(1)
22 VID0(1)
23 LDOV
24 GATE2
Pin Function
Small Signal Analog and Digital Ground
Gate Drive Output LDO1
Sense Input for LDO1
Sense Input for LDO2
Input 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
Power Ground for Low Side Switch
Low Side Driver Output
Supply for Low Side Driver
Supply for High Side Driver
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
Programming Input (LSB)
+12V for LDO section
Gate Drive Output LDO2
Top View
AGND
GATE1
LDOS1
LDOS2
VCC
OVP
PWRGOOD
CS-
CS+
PGNDH
DH
PGNDL
1
2
3
4
5
6
7
8
9
10
11
12
24 GATE2
23 LDOV
22 VID0
21 VID1
20 VID2
19 VID3
18 VID4
17 VOSENSE
16 EN
15 BSTH
14 BSTL
13 DL
(24 Pin SOIC)
Note:
(1) All logic level inputs and outputs are open
collector TTL compatible.
© 1998 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320










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Номер в каталогеОписаниеПроизводители
SC1182PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER/ DUAL LOW DROPOUT REGULATOR CONTROLLERSemtech Corporation
Semtech Corporation
SC1182CSWPROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER/ DUAL LOW DROPOUT REGULATOR CONTROLLERSemtech Corporation
Semtech Corporation
SC1183PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER/ DUAL LOW DROPOUT REGULATOR CONTROLLERSemtech Corporation
Semtech Corporation
SC1183CSWPROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER/ DUAL LOW DROPOUT REGULATOR CONTROLLERSemtech Corporation
Semtech Corporation

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