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SC1146CSW.TR PDF даташит

Спецификация SC1146CSW.TR изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «VRM9.0 PROGRAMMABLE/ MULTI-PHASE/ HIGH PERFORMANCE PWM CONTROLLER».

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Номер произв SC1146CSW.TR
Описание VRM9.0 PROGRAMMABLE/ MULTI-PHASE/ HIGH PERFORMANCE PWM CONTROLLER
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1146CSW.TR Даташит, Описание, Даташиты
VRM9.0 PROGRAMMABLE, MULTI-PHASE,
HIGH PERFORMANCE PWM CONTROLLER
SC1146
July 25, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1146 is the latest, high performance, multi-
phase (PWM) controller designed for high power mi-
croprocessors requiring ultra fast transient response.
The SC1146 is programmable for the voltage range
required by the latest Microprocessors . Utilizing a
novel and unique design, the controller distributes the
output load across (up to) four converter channels by
digitally phase shifting the PWM outputs. This ap-
proach greatly reduces the stress and heat on the out-
put stage components while lowering input ripple cur-
rent by as much as 80%. Accurate current sharing
among the four phases is achieved by precision design
techniques and trimming of critical elements.
The high speed transconductance error amplifier is ex-
ternally initialized using a soft-start capacitor allowing
the controller to “wake-up” without overshoot, thus pro-
tecting the low voltage microprocessor loads. The out-
put drive voltage to the power MOSFETs is pro-
grammable to minimize switching losses in the drive
circuitry.
The output voltage is digitally programmable by means
of a 5 bit DAC (new codes). A single resistor programs
the master clock frequency (8MHz max) or the clock
can be supplied by an external source where exact fre-
quency control is desired. The number of operating
phases is programmed independently of the external
clock. The parts features under-voltage lock-out with
hysteresis and over-current protection.
PIN CONFIGURATION
FEATURES
= Allows use of small surface mount components
= Ultra fast transient recovery time
= Dramatic reduction of input ripple current and out-
put ripple voltage
= 5-bit programmable DAC for the latest, lower
output voltage Microprocessors
= Wide, High frequency operating range
= Selectable 2, 3, 4 phase operation
= +5 Volt only operation eliminates the need for
+12V supply
= Precision load current sharing,1%PWM match
= Selectable internal or external clock
= Soft start/UVLO/Over current protection
APPLICATIONS
= High end servers and workstations
= High current/Ultra-fast transient microprocessors
ORDERING INFORMATION
DEVICE (1)
PACKAGE
SC1146CSW.TR
SO-24
TEMP. (TJ)
0 - 85°C
Note:
(1) Only available in tape and reel packaging. A reel
contains 1000 devices.
BLOCK DIAGRAM
Top View
(24-Pin SOIC)
The SC1146 is patent pending
© 2000 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1146CSW.TR Даташит, Описание, Даташиты
VRM9.0 PROGRAMMABLE, MULTI-PHASE,
HIGH PERFORMANCE PWM CONTROLLER
SC1146
July 25, 2000
ABSOLUTE MAXIMUM RATINGS
Parameter
VCC5V to GND
FBG to GND
VCC2 to GND
Operating Temperature Range
Junction Temperature Range
Storage Temperature Range
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Lead Temperature (Soldering) 10 sec
Symbol
Vcc5v
FBG
Vcc2
TA
TJ
TSTG
θJC
θJA
TLEAD
Limits
-0.3 to + 12
±1
-0.3 to +20
0 to +70
0 to +125
-55 to +150
25
80
300
Units
V
V
V
°C
°C
°C
°C/W
°C/W
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA = 25°C, VCC 5V = 5V, VCC2 = 5V, 4-Phase operation.
PARAMETER
Supply Voltage Range
UVLO Range
UVLO Hystersis
SYMBOL
VCC2
VCC5V
VCC5V
CONDITIONS
MIN TYP
3.9 5.0
3.9 5.0
TBD
MAX
15.0
6.0
UNITS
V
V
mV
Supply Voltage Range
Supply Current
Supply Current
Reference Current Pin Voltage
VID0-4 Clock Select & Divide
Select Logic Threshold
VID0-4 Clock Select & Divide
Select Input Bias Current
Enable Pin
Maximum Duty Cycle
DRV0-3 Output Voltage
DRV0-3 Source Current
DRV0-3 Sink Current
VCC5V
VCC2
VCC5V
VREF
VINL
VINH
IINL
IINH
VINL
VINH
DMAX
VOL
VOH
ISRC
ISNK
DRV Outputs open
VOUT = 2.00V, IO = 0
Iref = 250µA
Logic Low
Logic High
Vid0-4 = 0V
Vid0-4 = 4.5V
4.5 5.0
10
2.05
2
FB = 0V
Isink = 1mA
Isource = 1mA, PWRGOOD = Vcc5v
VOUT = 2.00V
VOUT = 2.00V
2
VCC2-1
75
40
20
5.5
40
0.8
-20
+50
.8
.3
V
mA
mA
V
V
V
µA
µA
V
V
%
V
V
mA
mA
The SC1146 is patent pending
© 2000 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1146CSW.TR Даташит, Описание, Даташиты
VRM9.0 PROGRAMMABLE, MULTI-PHASE,
HIGH PERFORMANCE PWM CONTROLLER
SC1146
July 25, 2000
ELECTRICAL CHARACTERISTICS (Cont.)
Unless otherwise noted: TA = 25°C, VCC5V = 5V, VCC2 = 5V, 4-Phase operation.
PARAMETER
SYMBOL
CONDITIONS
Bgout Voltage
Bgout Impedance
External Clock Freq. Range
Oscillator Frequency
Internal Clock Freq. Range
Match DRV0-3
PWM Off Time
VBgout
RO_Bg
Fext_CK
FOSC
Fint_CK
=D
Toff
Vid = 00000
Iref = 250µA
Duty cycle (Avg) = 50%
MIN TYP MAX UNITS
TBD 1.30 TBD V
3 K
.80 8.0 8.5 MHz
7.6 8.0 8.4 MHz
.80 8.0 8.5 MHz
-1 +1 %
25 %
Overcurrent Comparator,
Comparator, Common Mode
Range
OC+I/P bias Current
OCC_CMR
IB_OC+
Vin = 5V
3 15
+75 +250
OC-I/P bias Current
IB_OC-
Vin = 5V
Input Offset Voltage
VOS_OCC
Vin = 5V
Feedback Input Impedance
Duty Cycle Range
Ri_FB
D
VO = 2.00V
CONVERTER SPECIFICATIONS, Reference Application Circuit
Output Accuracy Over Set
Range
VOUT
Load Regulation
Line Regulation
VOUT
IO
VOUT
VIN
POWER GOOD SIGNAL
Off Leakage Current
Ileakage_Off
Power Good Max Sink Current ISink_Max
Power Good Threshold
Pwrgood_T_lo
Voltage Tolerance
Pwrgood_T_Hi
VID 0-4 = 0000-1111
VCC5V = 5.0V
VO = 2.000V
IO = 3A - 20A
VCC5V = 5V, VO = 2.000V
VIN = 4-6V, (VIN separated from
Vcc5v) IO = 5A , Clk = external
PWRGOOD = Logic High
PWRGOOD< = .8V
Vout = 1.300V - 1.950V
Vout = 2.000V - 3.500V
+75 +250
10
12
0 75
-1 +1
.025 .05
.15
+100
+150
2
2
Note:
(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.
V
µΑ
µΑ
mV
ΚΩ
%
%
%/A
%/V
µA
mA
mV
mV
The SC1146 is patent pending
© 2000 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320










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Номер в каталогеОписаниеПроизводители
SC1146CSW.TRVRM9.0 PROGRAMMABLE/ MULTI-PHASE/ HIGH PERFORMANCE PWM CONTROLLERSemtech Corporation
Semtech Corporation

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