ltc3445euf-pbf Linear Technology Corporation, ltc3445euf-pbf Datasheet - Page 6

• Manufacturer Part Number: ltc3445euf-pbf
• Description: I2c Controllable Buck Regulator With Two Ldos In A 4mm ? 4mm Qfn
• Manufacturer: Linear Technology Corporation

200mV/DIV
LTC3445
6
TYPICAL PERFOR A CE CHARACTERISTICS
1.60
1.56
1.52
1.48
1.44
1.40
6
4
3
1
0
5
2
2.5
0
Buck Switching Frequency
vs V
V
Slew Rates DAC Min to DAC Max
V
CC
TRACK
CC1
BATT vs V
V
CC1
= V
BACKUP
3.5
V
CC1
V
V
100µs/DIV
CC1
CC
CC1
= 2V
RAMP (V)
BATT
(V)
4.5
W
3445 G16
3445 G19
U
3445 G13
5.5
100mA/DIV
50mV/DIV
CURRENT
VOLTAGE
1.560
1.540
1.500
1.480
1.460
1.440
1.520
BUCK
LOAD
6
4
3
1
0
5
2
–50
0
Buck Switching Frequency
vs Temperature
V
Buck (DAC = Min)
100mA to 300mA Load Step
V
V
CC
CC1
BACKUP
–25
BATT vs V
= 5.5V
V
TRACK
= 2V
0
TEMPERATURE (°C)
V
TRACK
25
TRACK
20µs/DIV
50
RAMP (V)
75
100
V
0mA
5mA
CC
125
BATT
3445 G20
3445 G17
3445 G14
150
100mA/DIV
500mV/DIV
50mV/DIV
CURRENT
VOLTAGE
20mV/DIV
10mA/DIV
OUTPUTS
CURRENT
V
CC
BUCK
LOAD
BUCK
LOAD
BATT
Buck (DAC = Max)
100mA to 400mA Load Step
Soft-Start (DAC = Min and Max)
4.7Ω Load
PowerPath LDO Load Step
1mA to 5.5mA
200µs/DIV
200µs/DIV
20µs/DIV
3445fa
3445 G18
3445 G21
3445 G15