ltc3447edd-trpbf Linear Technology Corporation, ltc3447edd-trpbf Datasheet - Page 5

• Manufacturer Part Number: ltc3447edd-trpbf
• Description: I2c Controllable Buck Regulator In 3mm ? 3mm Dfn
• Manufacturer: Linear Technology Corporation

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