LTC3862 Datasheet, PDF (8/40 Pages) Linear Technology – Multi-Phase Current Mode Step-Up DC/DC Controller

LTC3862
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency vs
Input Voltage
320
315
310
305
300
295
290
285
280
0 4 8 12 16 20 24 28 32 36
INPUT VOLTAGE (V)
3862 G27
R_FREQ vs Frequency
1000
100
10
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY (kHz)
3862 G28
Frequency vs PLLFLTR Voltage
1400
1200
1000
800
600
400
200
0
0
0.5
1
1.5
2
2.5
PLLFLTR VOLTAGE (V)
3862 G29
Frequency Voltage vs
Temperature
1.235
1.233
1.231
1.229
1.227
1.225
1.223
1.221
1.219
1.217
1.215
1.213
1.211
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3862 G30
Minimum On-Time vs
Temperature
400
350
BLANK = 3V8
300
BLANK = FLOAT
250
200
BLANK = SGND
150
100
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3862 G31
Minimum On-Time vs
Input Voltage
400
350
BLANK = 3V8
300
BLANK = FLOAT
250
200
BLANK = SGND
150
100
4
8 12 16 20 24 28 32 36
INPUT VOLTAGE (V)
3862 G32
Gate Turn-On Waveform Driving
Renesas HAT2266
Gate Turn-Off Waveform Driving
Renesas HAT2266
GATE
1V/DIV
V_IN = 12V
VOUT = 48V
20ns/DIV
IOUT = 1A
MOSFET RENESAS HAT2266
3862 G33
GATE
1V/DIV
V_IN = 12V
VOUT = 48V
20ns/DIV
IOUT = 1A
MOSFET RENESAS HAT2266
3862 G34
3862fb
8