Datasheet

LTC3601
3
3601fb
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
VIN
Input Supply Range
l
415V
I
Q
Input DC Supply Current
Forced Continuous Operation
Sleep Current
Shutdown
MODE = 0V
MODE = INTV
CC
, V
FB
> 0.6V
RUN = 0V
700
300
14
1000
500
25
µA
µA
µA
V
FB
Feedback Reference Voltage
l
0.594 0.600 0.606 V
∆V
LINEREG
Reference Voltage Line Regulation V
VIN
= 4V to 15V 0.01 %/V
∆V
LOADREG
Output Voltage Load Regulation ITH = 0.6V to 1.6V 0.1 %
I
FB
Feedback Pin Input Current V
FB
= 0.6V ±30 nA
g
m(EA)
Error Amplifi er Transconductance ITH = 1.2V 2.0 mS
t
ON(MIN)
Minimum On-Time V
ON
= 1V, V
IN
= 4V 20 ns
t
OFF(MIN)
Minimum Off-Time V
IN
= 6V 40 60 ns
I
LIM
Valley Switch Current Limit 1.7 2.2 2.8 A
f
OSC
Oscillator Frequency V
RT
= INTV
CC
R
RT
= 160k
R
RT
= 80k
1.4
1.7
3.4
2
2
4
2.6
2.3
4.6
MHz
MHz
MHz
R
DS(ON)
Top Switch On-Resistance 130 m
Bottom Switch On-Resistance 100 m
V
VIN-OV
V
IN
Overvoltage Lockout Threshold V
IN
Rising
V
IN
Falling
l
l
16.8
15.8
17.5
16.5
18
17
V
V
V
INTVCC
INTV
CC
Voltage 4V < V
IN
< 15V 3.15 3.3 3.45 V
∆INTV
CC
INTV
CC
Load Regulation (Note 4) I
INTVCC
= 0mA to 20mA 0.6 %
V
UVLO
INTV
CC
Undervoltage Lockout
Threshold
INTV
CC
Rising, V
IN
= INTV
CC
INTV
CC
Falling, V
IN
= INTV
CC
2.75
2.45
2.9 V
V
V
RUN
RUN Threshold RUN Rising
RUN Falling
l
l
1.21
0.97
1.25
1.0
1.29
1.03
V
V
I
RUN(LKG)
RUN Leakage Current V
VIN
= 15V 0 ±3 µA
V
FB_GB
PGOOD Good-to-Bad Threshold FB Rising
FB Falling
8
–8
10
–10
%
%
V
FB_BG
PGOOD Bad-to-Good Threshold FB Rising
FB Falling
–3
3
–5
5
%
%
t
PGOOD
Power Good Filter Time 20 40 µs
R
PGOOD
PGOOD Pull-Down Resistance 10mA Load 15 
I
SW(LKG)
Switch Leakage Current V
RUN
= 0V 0.01 1 µA
t
SS
Internal Soft-Start Time V
FB
from 10% to 90% Full Scale 400 700 µs
V
FB_TRACK
TRACK Pin TRACK = 0.3V 0.28 0.3 0.315 V
I
TRACK
TRACK Pull-Up Current 1.4 µA
V
MODE/
SYNC
MODE Threshold Voltage MODE V
IH
MODE V
IL
l
l
1.0
0.4
V
V
SYNC Threshold Voltage SYNC V
IH
l
0.95 V
I
MODE
MODE Input Current MODE = 0V
MODE = INTV
CC
–1.5
1.5
µA
µA
The l denotes the specifi cations which apply over the full operating
junction temperature range, otherwise specifi cations are at T
A
= 25°C (Note 2). V
VIN
= 12V, unless otherwise specifi ed.