LTC3446 Datasheet, PDF (5/20 Pages) Linear Technology – Monolithic Buck Regulator with Dual VLDO Regulators

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3446
Buck Regulated Feedback Voltage
vs Temperature
808
806
804
802
800
798
796
V_IN = 2.7V
V_IN = 3.6V
794
V_IN = 4.2V
V_IN = 5.5V
792
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3446 G01
LDO2 Regulated Feedback
Voltage vs Temperature
408
406
404
402
400
398
396
V_IN = 2.7V
V_IN = 3.6V
394
V_IN = 4.2V
V_IN = 5.5V
392
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3446 G03
Maximum Peak Inductor Current
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
V_IN = 2.7V
V_IN = 3.6V
V_IN = 4.2V
1.1
V_IN = 5.5V
1.0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3446 G05
LDO1 Regulated Feedback
Voltage vs Temperature
408
406
404
402
400
398
396
V_IN = 2.7V
V_IN = 3.6V
394
V_IN = 4.2V
V_IN = 5.5V
392
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3446 G02
Undervoltage Lockout Threshold
vs Temperature
2.50
2.45
2.40
UVLO RISING
2.35
UVLO FALLING
2.30
2.25
2.20
2.15
2.10
2.05
2.00
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3446 G04
Oscillator Frequency
vs Temperature
2.50
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
V_IN = 2.7V
V_IN = 3.6V
2.05
V_IN = 4.2V
V_IN = 5.5V
2.00
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3446 G06
3446fd
5