Datasheet
LTC3557/LTC3557-1
7
35571fc
TYPICAL PERFORMANCE CHARACTERISTICS
I
BAT
vs V
BAT
Input Disconnect Waveform
Forward Voltage vs Ideal Diode
Current (No External FET)
Forward Voltage
vs Ideal Diode Current
(with Si2333DS External FET)
T
A
= 25°C unless otherwise specifi ed
Input Connect Waveform
Switching from 1x to 5x Mode
WALL Connect Waveform
WALL Disconnect Waveform
Switching from Suspend Mode
to 5x Mode
V
BAT
(V)
2.0
0
I
BAT
(mA)
100
200
300
400
600
2.4
2.8 3.2 3.6
35571 G10
4.0 4.4
500
V
BUS
= 5V
10x MODE
R
PROG
= 2k
R
CLPROG
= 2k
I
BAT
(A)
0
0
V
FWD
(V)
0.05
0.10
0.15
0.20
0.25
0.2
0.4 0.6 0.8
35571 G11
1.0 1.2
V
BAT
= 3.2V
V
BUS
= 0V
T
A
= 25°C
V
BAT
= 4.2V
V
BAT
= 3.6V
I
BAT
(A)
0
V
FWD
(mV)
15
20
25
0.6
1.0
35571 G12
10
5
0
0.2 0.4 0.8
30
35
40
V
BAT
= 3.8V
V
BUS
= 0V
T
A
= 25°C
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
35571 G25
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
35571 G26
ILIM0/ILIM1
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
35571 G27
ILIM0
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
ILIM1 = 5V
100µs/DIV
35571 G28
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
35571 G29
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
35571 G30