LTC3675 Datasheet, PDF (12/36 Pages) Linear Technology – 7-Channel Confi gurable High Power PMIC

LTC3675
TYPICAL PERFORMANCE CHARACTERISTICS
Buck-Boost Regulator,
Efficiency vs Load
100
90
80
70 _{VIN = 2.7V}
60
50
V_IN = 3.6V
V_IN = 5.5V
40
30
20
Burst Mode OPERATION
10
PWM MODE
0
1
10
100
1000
LOAD CURRENT (mA)
3675 G34
Buck-Boost Regulator,
Load Regulation
3.35
PWM MODE
3.34
3.33
3.32
3.31
V_IN = 4.2V
3.30
3.29
V_IN = 2.7V
3.28
V_IN = 3.6V
3.27
3.26
3.25
1
10
100
LOAD CURRENT (mA)
1000
3675 G35
Buck-Boost Regulator,
Line Regulation
3.40
PWM MODE
3.38
3.36
3.34
3.32
LOAD = 500mA
3.30
LOAD = 100mA
3.28
3.26
3.24
3.22
3.20
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3675 G36
Buck-Boost Regulator Transient
Response (PWM Mode)
V_OUT6
200mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
200mA/DIV
200μs/DIV
LOAD STEP = 100mA to 600mA
V_IN = 3.6V, V_OUT6 = 3.3V
3675 G37
Buck-Boost Regulator No Load
Start-Up (PWM Mode)
V_IN = 3.6V
V_OUT6
1V/DIV
INDUCTOR
CURRENT
500mA/DIV
EN6
2V/DIV
100μs/DIV
3675 G38
Buck-Boost Regulator, Reduction
in Load Current Deliverability
400
PWM MODE
350 ^{VOUT6 = 3.3V}
300
250
200
150
100
50
0
2.7
3
3.3 3.6 3.9 4.2
V_IN (V)
3675 G39
3675f
12