LX1676 Просмотр технического описания (PDF) - Microsemi Corporation
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LX1676 Datasheet PDF : 16 Pages
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INTEGRATED PRODUCTS
LX1676
Mobile AMD Athlon™ VRM Controller
PRELIMINARY 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 = -20uA
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 = -20uA
UGBW
Slew Rate
SR
` OSCILLATOR
Maximum Clock Frequency
Minimum Clock Frequency
Frequency Stability
` PWM OUTPUT
fMAX
fMIN
RPWM=10kΩ
RPWM=50kΩ
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 = 24 V
Input Offset Voltage
DC Open Loop Gain
VOS
VCM=1.4V
Output Voltage Swing
Unity Gain Bandwidth
VEO2(MAX)
VEO2(MIN)
UGBW
IEA2 = 2mA
IEA2 = -20uA
LX1676
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
KΩ
0
3
V
5
mA
4.0
0.2
V
10
MHz
5
V/µs
0.9
1
1.1 MHz
180 200 220 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
Revision: 0.4b, 9/14/2004
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
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