LTC3558
10
3558f
TYPICAL PERFORMANCE CHARACTERISTICS
Buck-Boost Regulator Start-Up
Transient, PWM Mode
Buck-Boost Regulator Start-Up
Transient, Burst Mode Operation
Buck-Boost Regulator
Line Regulation
Buck-Boost Regulator
Effi ciency vs Input Voltage
Buck-Boost Effi ciency
vs Load Current
Buck-Boost Regulator
Load Regulation
2.700
3.300
3.900
4.200
3.000
3.600
PV
IN2
(V)
EFFICIENCY (%)
60
85
90
95
100
75
55
80
50
70
65
3558 G37
I
LOAD
= 100mA
I
LOAD
= 400mA
I
LOAD
= 10mA
I
LOAD
= 1mA
V
OUT
= 3.3V
Burst Mode
OPERATION
PWM MODE
I
LOAD
(mA)
3.27
V
OUT
(V)
3.29
3.31
3.33
3.35
0.10
10
100
1000
3.24
3.25
1
3.36
3.28
3.30
3.32
3.34
3.26
3558 G39
PWM MODE
Burst Mode OPERATION
PV
IN2
= 3.6V
2.700
3.300
3.900
4.200
3.000
3.600
PV
IN2
(V)
V
OUT
(V)
3.28
3.33
3.34
3.35
3.36
3.26
3.31
3.27
3.32
3.25
3.24
3.30
3.29
3558 G40
PWM MODE
I
LOAD
= 100mA
Burst Mode
OPERATION
I
LOAD
= 10mA
I
LOAD
(mA)
30
EFFICIENCY (%)
50
70
90
0
10
100
40
60
80
20
3558 G38
3.6V
4.2V
3.6V
4.2V
2.7V
2.7V
V
OUT
= 3.3V
PV
IN2
, Burst Mode
OPERATION
PV
IN2
, PWM MODE
0.10
10
100
1000
1
V
OUT
1V/DIV
EN2
1V/DIV
100μs/DIV
3558 G41
INDUCTOR
CURRENT
I
L
= 200mA/DIV
PV
IN2
= 3.6V
R
LOAD
= 332Ω
V
OUT
1V/DIV
EN2
1V/DIV
100μs/DIV
3558 G42
INDUCTOR
CURRENT
I
L
= 200mA/DIV
PV
IN2
= 3.6V
R
LOAD
= 16Ω
T
A
= 25°C, unless otherwise noted.
