LX1675 Ver la hoja de datos (PDF) - Microsemi Corporation
Número de pieza
componentes Descripción
Lista de partido
LX1675 Datasheet PDF : 19 Pages
| |||
LX1675
TM
®
Multiple Output LoadSHARE™ PWM
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
For the LX1675ILQ the following specifications apply over the ambient temperature -40°C < TA < 85°C and for the LX1675CLQ 0°C ≤
TA ≤ 85°C except where otherwise noted and the following test conditions: VIN & VSLR = 12V, VCX = 17V, HOX and LOX =3000pF
Load, FS = 0 (f = 300KHz).
Parameter
Symbol
Test Conditions
LX1675
Units
Min Typ Max
` SWITCHING REGULATORS
VIN
Regulator Functional
4.5
24
Input Voltage
VCX
30
V
VCCL
6
Operation Current
Feedback Voltage Internal
Reference
IVIN
Static
VFB
4.5V < VIN < 12V
6
mA
0.784
0.816 V
Line Regulation
-1
1
%
Load Regulation
System Level measurement, Closed Loop
-1
1
%
High Side Minimum Pulse Width
Load = 3000pF
50
nS
Maximum Duty Cycle
PWMDC 600kHz
74
%
85
%
Lox Minimum On Time
VLOx @ 25°C from 3V going high to 1V going low
180
225 320
nS
Buffered Reference Voltage
` ERROR AMPLIFIER
VREF
Max Load Current 0.5mA
0.778
0.822 V
Input Offset Voltage
DC Open Loop Gain
VOS
Common Mode Input Voltage = 1V
-7.0
7.0
mV
70
dB
Unity gain bandwidth
High Output Voltage
Low Output Voltage
Input Common Mode Range
AVUGBW
VOH
VOL
I Source = 2mA
I Sink = 100µA
Input Offset Voltage < 20mV
10
MHz
3.75
5.0
V
100 mV
0.1
3.5
V
Input Bias Current
` CURRENT SENSE
IIN
0V and 3.5V Common Mode Voltage
100
nA
CS Bias Current (Source)
ISET
VCSX = -0.2V, VPGX = 0V @ 25°C
48
55
62
µA
CS Trip Threshold
CS Delay (Blanking)
VTRIP
TCSD
Referenced to VCSX, VPGX = 0V
Any PWM Output Activating Current Limit for
±3
mV
150
nS
Shared Fault Mode
VIH
More than 4 Clock Cycles, Soft Starts all PWM
Outputs
Current Limit Event of One PWM Does Not Effect
2
V
VIL
` OUTPUT DRIVERS – N Channel MOSFETS
the Continued Function of the Two Other PWM
0.8
Regulators
Low Side Driver Operating Current
High Side Driver Operating Current
Drive Rise and Fall Time
Dead Time – High Side to Low Side
or Low Side to High Side
IVCCL
IVCX
TR/F
TDEAD
Static
Static
CL = 3000pF
Drive Load = 3000pF, VDRIVE < 1V
2.5
mA
3
mA
50
nS
50
nS
High Side Driver Voltage
Drive High
Drive Low
VHOx
IHOx = 20mA, VCx – HRx = 5.0V
IHOx = -20mA, VCx – HRx = 5.0V
4.8
4.9
V
0.1
0.2
Low Side Driver Voltage
Drive High
VLOx
ILOx = 20mA, VCCL – PGx = 5.0V
4.8
4.9
V
Drive Low
ILOx = -20mA, VCCL – PGx = 5.0V
0.1
0.2
High Side Driver Current
IHOx
VCx – HRx = 5.0V, Capacitive Load, PW < 200ns
±1
APEAK
Low Side Driver Current
ILOx
VCCL – PGx = 5.0V, Capacitive Load, PW <
200ns
±1.5
APEAK
Maximum Load
` OSCILLATOR
QgMAX
50
nC
PWM Switching Frequency
Ramp Amplitude
FSW
VRAMP
VFS <0.8V @ 25°C
VFS >2V @ 25°C
255 300 345 KHz
510 600 690 KHz
1.6
VPP
Copyright © 2004
Rev. 1.2a, 2006-02-16
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Share Link: 