LT8705
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specified.
SRVO_xx Pin Activation
Thresholds
Internal VIN UVLO
SHDN and MODE Pin Currents
18
16
14
12
10
8
3.0
2.5
125
100
75
MODE
SHDN
2.0
1.5
50
FBIN
FBOUT
25
IMON_IN
IMON_OUT
6
0
1.0
0.5
0
4
–25
–50
–75
2
0
–2
0
3
6
9
12 15 18 21 24 27 30
PIN VOLTAGE (V)
8705 G19
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
8705 G20
50 75
25
TEMPERATURE (°C)
–50 –25
0
100 125 150
8705 G21
SRVO_xx Pin Activation Threshold
Hysteresis
Forced Continuous Mode
(Figure 14)
Discontinuous Mode (Figure 14)
50
40
30
20
10
0
SW1
20V/DIV
SW1
50V/DIV
SW2
20V/DIV
SW2
50V/DIV
FBIN
FBOUT
I
I
L
2A/DIV
L
IMON_IN
IMON_OUT
2A/DIV
8705 G23
8705 G24
V
V
= 72V
5µs/DIV
V
V
= 36V
5µs/DIV
50
25
TEMPERATURE (°C)
–50 –25
0
75 100 125 150
IN
OUT
IN
OUT
= 48V
= 48V
8705 G22
Forced Continuous Mode
(Figure 14)
Forced Continuous Mode
(Figure 14)
SW1
20V/DIV
SW1
20V/DIV
SW2
20V/DIV
SW2
20V/DIV
I
I
L
L
2A/DIV
2A/DIV
8705 G25
8705 G26
V
V
= 48V
5µs/DIV
V
V
= 72V
5µs/DIV
IN
OUT
IN
OUT
= 48V
= 48V
8705p
9
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Linear [ Linear ]
