LTC3447_15 Datasheet, PDF (5/16 Pages) Linear Technology – I2C Controllable Buck Regulator

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3447
R_DS(ON) vs Supply Voltage
0.60
0.55
R_DS(ON) vs Temperature
0.60 _{VIN = 3.6V}
0.55
0.50
0.50
0.45
PFET
0.40
0.45
PFET
0.40
0.35
NFET
0.30
0.35
NFET
0.30
0.25
0.25
0.20
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
5.5
3447 G10
0.20
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3447 G11
Feedback Reference vs Supply
Voltage
610
Feedback Voltage vs
Temperature
618
Output Voltage vs Supply Voltage
2.060
0.720
2.055
2.050
DAC = MAX
0.715
0.710
2.045
0.705
2.040
0.700
2.035
2.030
DAC = MIN
0.695
0.690
2.025
0.685
2.020
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
0.680
5.5
3447 G12
Load Step (200mA to 400mA)
612
V_OUT
605
50mV/DIV
606
600
600
LOAD CURRENT
594
595
200mA/DIV
588
590
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
5.5
3447 G13
582
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3447 G15
40µs/DIV
3447 G15
Soft-Start with No Load
500mV/DIV
5V/DIV
200mA/DIV
500mV/DIV
V_OUT
PGOOD
INDUCTOR CURRENT
200µs/DIV
V_OUT(MIN) to V_OUT(MAX) Transition
PULSE SKIP MODE
500mV/DIV
V_OUT
V_OUT(MAX) to V_OUT(MIN) Transition
BURST MODE OPERATION
500mV/DIV
V_OUT
100mA/DIV
3447 G16
5V/DIV
INDUCTOR CURRENT
PGOOD
100µs/DIV
200mA/DIV
3447 G17
5V/DIV
INDUCTOR CURRENT
PGOOD
100µs/DIV
3447 G18
3447f
5