LX1672 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1672 Datasheet PDF : 20 Pages
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LX1672
®
Multiple Output LoadSHARE™ PWM
TM
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, VCX = 12V, HOX = LOX = 3000pF Load.
Parameter
Symbol
Test Conditions
` SWITCHING REGULATORS
Input Voltage
VCC
Input Voltage
Operation Current
VCCL, VCX
ICC
Static and Dynamic
Reference Voltage
VSS
TA = 25°C
0°C < TA < 70°C
Line Regulation (Note 2)
Load Regulation (Note 2)
Minimum Pulse Width
TSSOP Package
Minimum Pulse Width
MLPQ PAckage
Maximum Duty Cycle
LX1672-03 Load = 3000pF
Maximum Duty Cycle
LX1672-05 Load = 3000pF
Maximum Duty Cycle
` ERROR AMPLIFIERS
LX1672-06 Load = 3000pF
Input Offset Voltage
Vos
Common Mode Input Voltage = 1V
DC Open Loop Gain
Unity Gain Bandwidth
UGBW
High Output Voltage
Low Output Voltage
VOH
I Source = 2mA
VOL
I Sink = 10uA
Input Common Mode Range
Input Offset Voltage < 20mV
Input Bias Current
` CURRENT SENSE
IIN
0 and 3.5 V Common Mode Input Voltage
Current Sense Bias Current
ISET
VCSX = VVSX – 0.3V , VVSX = 5V
Trip Threshold
VTRIP
Current Sense Delay
TCSD
Current Sense Comparator
Operating Current
ICSX
` OUTPUT DRIVERS – N-CHANNEL MOSFETS
Referenced to VSX , VVSX = 5V
Current into VSX pins
Low Side Driver Operating Current
IVCCL
Static
High Side Driver Operating Current
IVCX
Static
Drive Rise Time, Fall Time
TRF
CL = 3000pF
High Level Output Voltage
Low Level Output Voltage
` OSCILLATOR
VDH
ISOURCE = 20mA, VCCL = 12V
VDL
ISINK = 20mA, VCCL = 12V
PWM Switching Frequency
LX1672-03
PWM Switching Frequency
FSW
LX1672-05
PWM Switching Frequency
LX1672-06
Ramp Amplitude
VRAMP
LX1672
Units
Min Typ Max
4.5
5.5
V
16
V
10
mA
0.792 0.8 0.808
V
0.784
0.816
-1
1
%
-1
1
%
250 nS
150 nS
85
%
75
%
70
%
-6.0
6.0 mV
70
dB
16
MHz
3.8
5
V
100 mV
.1
3.5
V
100
nA
45
50
55
µA
260 300 340 mV
350
nS
2
5
mA
2.5
mA
3
mA
50
nS
10
11
V
0.15 0.25
V
255 300 345 KHz
425 500 575 KHz
510 600 690 KHz
1.25
VPP
Copyright © 2000
Rev. 0.3m, 2005-04-12
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
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