Datasheet

LTC3677-3
12
36773f
Typical perForMance characTerisTics
Switching from Suspend Mode
to 5x Mode
WALL Connect Waveform
WALL Disconnect Waveform
Oscillator Frequency
vs Temperature
Step-Down Switching Regulator 1
3.3V Output Efficiency vs I
OUT1
T
J
= 25°C unless otherwise specified
I
LIM0
5V/DIV
V
OUT
5V/DIV
I
BUS
0.5A/DIV
I
BAT
0.5A/DIV
V
BAT
= 3.75V
I
OUT
= 100mA
R
CLPROG
= 2k
R
PROG
= 2k
I
LIM1
= 5V
100µs/DIV
36773 G16
WALL
5V/DIV
V
OUT
5V/DIV
I
WALL
0.5A/DIV
I
BAT
0.5A/DIV
V
BAT
= 3.75V
I
OUT
= 100mA
R
PROG
= 2k
1ms/DIV
36773 G17
WALL
5V/DIV
V
OUT
5V/DIV
I
WALL
0.5A/DIV
I
BAT
0.5A/DIV
V
BAT
= 3.75V
I
OUT
= 100mA
R
PROG
= 2k
1ms/DIV
36773 G18
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
1.8
1.9
2.0
2.5
2.6
2.7
2.8
2.2
0
50
75
36773 G19
2.3
2.4
2.1
–25
25
100
125
V
OUT
= 5V
V
OUT
= 3.8V
I
OUT
(mA)
0.01
40
EFFICIENCY (%)
50
60
70
80
0.1 1 10 100 1000
36773 G20
30
20
10
0
90
100
V
IN12
= 3.8V
V
IN12
= 5V
Burst Mode
OPERATION
PULSE-SKIPPING
V
OUT1
= 3.3V
Switching from 1x to 5x Mode
I
LIM0
/I
LIM1
5V/DIV
I
BUS
0.5A/DIV
I
BAT
0.5A/DIV
V
BAT
= 3.75V
I
OUT
= 50mA
R
CLPROG
= 2k
R
PROG
= 2k
1ms/DIV
36773 G15
Input Connect Waveform
Input Disconnect Waveform
V
BUS
5V/DIV
V
OUT
5V/DIV
I
BUS
0.5A/DIV
I
BAT
0.5A/DIV
V
BAT
= 3.75V
I
OUT
= 100mA
R
CLPROG
= 2k
R
PROG
= 2k
1ms/DIV
36773 G13
V
BUS
5V/DIV
V
OUT
5V/DIV
I
BUS
0.5A/DIV
I
BAT
0.5A/DIV
V
BAT
= 3.75V
I
OUT
= 100mA
R
CLPROG
= 2k
R
PROG
= 2k
1ms/DIV
36773 G14