LTC3633A/LTC3633A-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN1 = VIN2 = 12V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
V
Supply Range
3.6
20
V
IN1
l
l
V
V
Supply Range
Supply Range
3.6
1.5
20
20
V
V
IN1
IN2
3.6V < V < 20V
IN1
Output Voltage Range (Note 4)
LTC3633A, V = V
0.6
1.5
6
12
V
V
ON
OUT
OUT
LTC3633A-1, V = V
ON
I
Input DC Supply Current (V + V
)
IN2
Q
IN1
Both Channels Active (Note 5)
Sleep Current
MODE = 0V
1.3
500
13
mA
μA
μA
MODE = INTV , V , V
> 0.6
CC FB1 FB2
Shutdown
RUN1 = RUN2 = 0V
l
V
Feedback Reference Voltage
0.594
0.6
0.002
0.05
0.606
30
V
%/V
%
FB
ΔV
ΔV
Reference Voltage Line Regulation
Output Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
Minimum On Time
V = 3.6V to 20V
IN
LINE_REG
LOAD_REG
ITH = 0.8V to 1.6V
I
nA
FB
g
ITH = 1.2V
1.8
20
45
mS
ns
m(EA)
t
t
f
V
V
V
= 0.6V, V = 4V
ON
ON
IN
IN
Minimum Off Time
= 6V
ns
OFF
OSC
Oscillator Frequency
= INTV
1.4
1.7
3.4
2
2
4
2.6
2.3
4.6
MHz
MHz
MHz
RT
CC
RT = 162k
RT = 80.6k
I
Valley Switch Current Limit
2.6
3.5
4.5
A
LIM
R
Top Switch On-Resistance
Bottom Switch On-Resistance
130
65
mΩ
mΩ
DS(ON)
I
Switch Leakage Current
V
= 20V, V = 0V
RUN
0.01
1
μA
SW(LKG)
IN
V
V
Overvoltage Lockout Threshold
V
V
Rising
Falling
22.5
21.5
V
V
VIN-OV
IN
IN
IN
20.3
3.1
22.5
3.5
INTV Voltage
3.6V < V < 20V, 0mA Load
3.3
1.3
V
CC
IN
INTV Load Regulation
0mA to 50mA Load, V = 4V to 20V
%
CC
IN
l
l
RUN Threshold Rising
RUN Threshold Falling
1.18
0.98
1.22
1.01
1.26
1.04
V
V
RUN Leakage Current
V2P5 Voltage
V
= 20V
0
3
μA
V
IN
l
I
= 0mA to 10mA
2.46
2.5
2.54
LOAD
PGOOD Good-to-Bad Threshold
V
V
Rising
Falling
8
–8
10
–10
%
%
FB
FB
PGOOD Bad-to-Good Threshold
V
V
Rising
Falling
–3
3
–5
5
%
%
FB
FB
R
PGOOD Pull-Down Resistance
Power Good Filter Time
10mA Load
20
40
Ω
μs
μs
V
PGOOD
PGOOD
SS
t
t
20
Internal Soft-Start Time
10% to 90% Rise Time
TRACKSS = 0.3V
400
0.3
1.4
700
V
During Tracking
0.28
0.315
FB
I
TRACKSS Pull-Up Current
μA
TRACKSS
3633a1f
3
Linear [ Linear ]
