LTC3637_15 Datasheet, PDF (6/26 Pages) Linear Technology – 76V, 1A Step-Down Regulator

LTC3637
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Leakage Current
vs Temperature
35
V_IN = 65V
25
15
SW = 65V
5
–5
SW = 0V
Switch On-Resistance
vs Input Voltage
1.0
0.8
0.6
150°C
0.4
25°C
–55°C
0.2
Switch On-Resistance
vs Temperature
0.55
V_IN = 12V
0.45
0.35
0.25
–15
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G16
Load Step Transient Response
OUTPUT
VOLTAGE
50mV/DIV
LOAD
CURRENT
500mA/DIV
V_IN = 12V
100µs/DIV
V_OUT = 5V
5mA TO 1A LOAD STEP
FIGURE 13 CIRCUIT
3637 G19
0
0 10 20 30 40 50 60 70
INPUT VOLTAGE (V)
3637 G17
Operating Waveforms, V_IN = 76V
OUTPUT
VOLTAGE
50mV/DIV
SWITCH
VOLTAGE
25V/DIV
INDUCTOR
CURRENT
2A/DIV
V_OUT = 5V
10µs/DIV
I_OUT = 1A
FIGURE 13 CIRCUIT
3637 G20
0.15
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G18
Short Circuit and Recovery
OUTPUT
VOLTAGE
2V/DIV
INDUCTOR
CURRENT
1A/DIV
V_IN = 12V
200µs/DIV
V_OUT = 5V
I_OUT = 50mA (NON SHORT CIRCUIT)
FIGURE 13 CIRCUIT
3637 G21
3637fa
6
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