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LX1677 데이터시트 PDF




Microsemi Corporation에서 제조한 전자 부품 LX1677은 전자 산업 및 응용 분야에서
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부품번호 LX1677 기능
기능 AMD64 Processor VRM Controller
제조업체 Microsemi Corporation
로고 Microsemi Corporation 로고


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LX1677 데이터시트, 핀배열, 회로
www.DataSheet4U.com
LX1677
TM ® AMD64 Processor VRM Controller
PRODUCTION DATA SHEET
DESCRIPTION
The LX1677 is a highly integrated maximizing regulator response.
VRM power supply controller IC A true differential input amplifier is
featuring two PWM switching used for remote voltage sensing at the
regulator stages.
processor core.
The two constant frequency A VID code generator provides an
voltage-mode PWM phases are internal reference that will set the
configured as a single biphase high output voltage. This VID code can be
current output core supply.
changed during operation and the
In biphase operation, the high reference will slew the output voltage to
current (>35A) output is generated by its new setting at a preset rate. During
a LoadSHARETM† technique that VID changes on the fly the Power Good
balances the currents in the two indication will stay valid.
phases. Power loss and noise, due to The current through the lower phase
the ESR of the input capacitors, are 1 MOSFET will be sampled using its
minimized by operating the PWMs RDS(ON) for current limit and shut
180° out of phase.
down.
A synchronized Transient For further protection, an over
Correction
Loop†
provides voltage circuit will trip at a specified
exceptional control of the output setting and clamp the output by turning
droop and overshoot during very high off the upper MOSFETs and turning on
di/dt load changes, the circuit can be the lower MOSFETs.
configured for droop only, overshoot The upper MOSFET drivers use a
only or both.
bootstrap capacitor to provide the upper
This architecture also minimizes drive voltage over the input voltage
capacitor requirements while range of 6 to 24 volts.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected By US Patents: US6292378,US6285571
‡ Protected By US Patents: US6825571, US6356063, US6605931
V in + 5 V
PRODUCT HIGHLIGHT
T ra n s ie n t C o re c tio n L o o p
V in 6 to 2 4 V
70nH
5 B it V ID
LX1677
V in 6 to 2 4 V
KEY FEATURES
ƒ High Current Biphase
Operation
ƒ Outputs As Low As 0.800V
ƒ † Biphase LoadSHARETM
ƒ ‡ Transient Correction Loop™
Reduces Required
Capacitance
ƒ Differential Amplifier For
Remote Voltage Sensing
ƒ Integrated High Current
MOSFET Drivers
ƒ 200KHz to 1MHz Frequency
Operation
ƒ Programmable Slew Rate
Control For Start-Up Sequence
and VID change
ƒ VID Changes On The Fly
ƒ Power Good Indicator
ƒ Short Circuit Protection
ƒ Output Over Voltage and
Under Voltage Protection
ƒ No current-sense resistors
APPLICATIONS
ƒ AMD Athlon 64™ and AMD
Opteron™ Processors
ƒ Processor Core Voltage Supply
ƒ Voltage Regulator Modules
Vout
TJ (°C)
0 to 70
PACKAGE ORDER INFO
Plastic TSSOP
PW 38-Pin
Plastic MLPQ
LQ 38-Pin
RoHS Compliant / Pb-free Transition DC: 0518 RoHS Compliant / Pb-free Transition DC: 0512
LX1677CPW
LX1677CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1677CLQ-TR)
Copyright © 2000
Rev 1.1, 2003-03-03
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1




LX1677 pdf, 반도체, 판매, 대치품
LX1677
TM ® AMD64 Processor VRM Controller
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C TA 70°C except where
otherwise noted and the following test conditions: VCC = 5V, VCCL = 5V, VIN = 12V, Switching Frequency = 500KHz.
Parameter
Symbol
Test Conditions
` REGULATOR
IC Supply Current
IQ(VCC)
ENA = VCC, FB+ = FB-
ENA = GND
Low Side Driver Operating
Current
IQ(VCCL) ENA = VCC, FB+ = FB-
High Side Driver Operating
Current
` ERROR AMPLIFIER: PHASE 1
IQ(VCx) ENA = VCC, FB+ = FB-
Input Offset Voltage
Input Bias Current
DC Open Loop Gain
VOS Common Mode Voltage (VCM) = 1.4V
IEA1
Input Common Mode Range
Output Voltage Swing
Unity Gain Bandwidth
` DIFFERENTIAL AMPLIFIER
VICM
VEO1(MAX)
VEO1(MIN)
UGBW
CMRR > 50dB
IEA1 = 2mA
IEA1 = -20µA
Input Offset Voltage
Gain
Common Mode Rejection Ratio
VOS VCM=1.4V
ADA
CMRRDA 0.8V < VCM < 2.5V
Input Resistance
RIN Measured at FB+ Input
Input Common Mode Range
Source / Sink Current
Output Voltage Swing
Unity Gain Bandwidth
VCM
VDFOUT = 0V
VDFOUT(MAX) IDFOUT = 2mA
VDFOUT (MIN) IEA1 = -20µA
UGBW
Slew Rate
` OSCILLATOR
SR
Maximum Clock Frequency
Minimum Clock Frequency
Frequency Stability
` PWM OUTPUT
fMAX
fMIN
RPWM=10k
RPWM=50k
Maximum Duty Cycle
DCMAX
During Transient Correction Switching
Transient Correction Not Switching
Minimum Pulse Width
Dead Time
tPWM(MIN) 3000pF Load
3000pF Load at 50% of VCCL
VIN = 6V
Ramp Amplitude
VRAMP
` PHASE 2 INTEGRATING AMPLIFIER
VIN = 12
VIN = 24V
Input Offset Voltage
DC Open Loop Gain
Output Voltage Swing
Unity Gain Bandwidth
VOS VCM=1.4V
VEO2(MAX)
VEO2(MIN)
UGBW
IEA2 = 2mA
IEA2 = -20µA
LX1677
Units
Min Typ Max
1 5 9 mA
1 µA
0.5 1 mA
2 4 mA
-6 6 mV
-100
100 nA
60 70
dB
0.8 2.5 V
4.0
0.15 0.5
V
20 MHz
-6 6 mV
0.99 1 1.01 V/V
65 dB
30 K
0 3V
5 mA
4.0
0.2
V
10 MHz
5 V/µs
0.9 1 1.1 MHz
150 200 220 KHz
4%
40
100
50
%
60 nS
50 80 200 nS
0.70
1.40 V
2.80
-6 6 mV
70 dB
4.0
0.15 0.5
V
20 MHz
Copyright © 2000
Rev 1.1, 2003-03-03
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4

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LX1677 전자부품, 판매, 대치품
TM
FB -
FB +
DACOUT
VID0
VID1
VID2
VID3
VID4
PWGD
VIN
ROSC
VCC
GND
LX1677
® AMD64 Processor VRM Controller
PRODUCTION DATA SHEET
SIMPLIFIED BLOCK DIAGRAM
DFOUT EA1 -
EO1
VCCL
Diff Amp
-
Phase 1
Error Amp
-
-
I-MAX
SQ
R
I-MIN
50µA
DAC
DACOUT
- 30mV
DACOUT
0.85
2.35
Band-
gap
VCC
VIN
PGOOD
_
UV
+
_
OV
+
UVLO
POR
ILIM
SRS
Fault
S
SS
180°
-
gm
PGOOD
DACOUT
AMP
FRQ
OSC
VIN
180°
PGN VS3
35mV
+offset
35mV _
offset
ILIM
ILIM
+IMAX
_
_IMIN
+
VCCL
ENA
I-MIN
RQ
S
I-MAX
Phase 2
Integrating
- Amp
100K
90K
90K
Phase 2
Differential
Amp
- 90K
90K
Bandgap
VC1
HO1
VS1
LO1
PGN
VC2
HO2
VS2
LO2
EO2
EA2 -
LP1
LP2
ILIM3 ILIM1
PGN3 I-Min VS3 I-Max VC3
ENA
Copyright © 2000
Rev 1.1, 2003-03-03
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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