lx1675 Microsemi Corporation, lx1675 Datasheet - Page 4

• Manufacturer Part Number: lx1675
• Description: Multiple Output Loadshare?? Pwm Production Data Sheet
• Manufacturer: Microsemi Corporation

Copyright © 2004
Rev. 1.2a, 2006-02-16
For the LX1675ILQ the following specifications apply over the ambient temperature -40°C < TA < 85°C and for the LX1675CLQ 0°C
T
Load, FS = 0 (f = 300KHz).
A
SWITCHING REGULATORS
Operation Current
Feedback Voltage Internal
Reference
Line Regulation
Load Regulation
High Side Minimum Pulse Width
Lox Minimum On Time
Buffered Reference Voltage
ERROR AMPLIFIER
Input Offset Voltage
DC Open Loop Gain
Unity gain bandwidth
High Output Voltage
Low Output Voltage
Input Common Mode Range
Input Bias Current
CURRENT SENSE
CS Bias Current (Source)
CS Trip Threshold
CS Delay (Blanking)
OUTPUT DRIVERS – N Channel MOSFETS
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
High Side Driver Current
Low Side Driver Current
Maximum Load
OSCILLATOR
Ramp Amplitude
Input Voltage
Maximum Duty Cycle
Shared Fault Mode
High Side Driver Voltage
Low Side Driver Voltage
PWM Switching Frequency
≤
85°C except where otherwise noted and the following test conditions: V
TM
Parameter
Drive High
Drive Low
Drive High
Drive Low
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
E L E C T R I C A L C H A R A C T E R I S T I C S
Symbol
VRAMP
PWM
AV
VCCL
Qg
VLOx
T
VCX
V
V
T
I
V
V
VIN
V
V
V
I
I
T
I
F
V
VCCL
I
I
V
V
DEAD
I
SET
VCX
HOx
LOx
VIN
TRIP
CSD
REF
UGBW
HOx
R/F
LOx
SW
OS
OH
IN
FB
OL
IH
MAX
IL
DC
Integrated Products Division
Regulator Functional
Static
4.5V < VIN < 12V
System Level measurement, Closed Loop
Load = 3000pF
600kHz
@ 25°C from 3V going high to 1V going low
Max Load Current 0.5mA
Common Mode Input Voltage = 1V
I Source = 2mA
I Sink = 100µA
Input Offset Voltage < 20mV
0V and 3.5V Common Mode Voltage
V
Referenced to V
Any PWM Output Activating Current Limit for
More than 4 Clock Cycles, Soft Starts all PWM
Outputs
Current Limit Event of One PWM Does Not Effect
the Continued Function of the Two Other PWM
Regulators
Static
Static
C
Drive Load = 3000pF, V
I
I
I
I
VCx – HRx = 5.0V, Capacitive Load, PW < 200ns
VCCL – PGx = 5.0V, Capacitive Load, PW <
200ns
V
V
HOx
HOx
LOx
LOx
CSX
FS
FS
L
Microsemi
= 3000pF
= 20mA, VCCL – PGx = 5.0V
= -20mA, VCCL – PGx = 5.0V
= 20mA, VCx – HRx = 5.0V
= -20mA, VCx – HRx = 5.0V
<0.8V @ 25°C
>2V @ 25°C
®
= -0.2V, V
Test Conditions
PGX
CSX
= 0V @ 25°C
, V
Multiple Output LoadSHARE™ PWM
PGX
DRIVE
IN
= 0V
& VSLR = 12V, V
< 1V
P
RODUCTION
CX
D
= 17V, HOX and LOX =3000pF
0.784
0.778
Min
3.75
ATA
180
-7.0
255
510
4.5
0.1
0.8
4.8
4.8
74
85
48
-1
-1
S
LX1675
HEET
Typ
±1.5
225
100
150
300
600
5.0
2.5
4.9
0.1
4.9
0.1
1.6
50
70
10
55
±3
50
50
±1
50
6
3
0.816
0.822
Max
320
100
345
690
7.0
3.5
0.2
0.2
24
30
62
6
1
1
2
LX1675
Units
A
A
MHz
VPP
KHz
KHz
mA
mV
mV
mV
mA
mA
nS
nS
dB
nA
µA
nS
nS
nS
nC
PEAK
PEAK
%
%
%
%
V
V
V
V
V
V
V
V
≤
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