LTC3557 LINER [Linear Technology], LTC3557 Datasheet - Page 7

• Manufacturer Part Number: LTC3557
• Description: USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
• Manufacturer: LINER [Linear Technology]

0.5A/DIV
0.5A/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
0.5A/DIV
0.5A/DIV
5V/DIV
5V/DIV
5V/DIV
5V/DIV
ILIM0
V
V
V
I
I
I
I
600
500
400
300
200
100
BUS
OUT
BUS
BAT
OUT
BUS
BAT
0
2.0
Input Connect Waveform
V
I
R
R
I
Switching from Suspend Mode
to 5x Mode
V
I
R
R
ILIM1 = 5V
OUT
OUT
BAT
BAT
CLPROG
PROG
BAT
CLPROG
PROG
= 100mA
= 100mA
= 3.75V
= 3.75V
vs V
2.4
= 2k
= 2k
= 2k
= 2k
BAT
2.8
100μs/DIV
1ms/DIV
V
V
10x MODE
R
R
BAT
BUS
PROG
CLPROG
3.2
(V)
= 5V
= 2k
3.6
= 2k
4.0
35571 G10
35571 G25
35571 G28
4.4
0.5A/DIV
0.5A/DIV
0.5A/DIV
0.5A/DIV
5V/DIV
5V/DIV
5V/DIV
5V/DIV
WALL
I
V
V
V
WALL
I
0.25
0.20
0.15
0.10
0.05
I
I
BUS
OUT
BUS
OUT
BAT
BAT
0
Forward Voltage vs Ideal Diode
Current (No External FET)
0
V
I
R
R
V
I
R
Input Disconnect Waveform
WALL Connect Waveform
OUT
OUT
V
T
BAT
BAT
CLPROG
PROG
PROG
A
BUS
= 25°C
= 100mA
= 100mA
= 3.75V
= 3.75V
0.2
= 0V
= 2k
= 2k
= 2k
V
0.4
BAT
= 3.6V
1ms/DIV
1ms/DIV
I
BAT
0.6
V
(A)
BAT
= 3.2V
0.8
V
BAT
1.0
= 4.2V
35571 G11
35571 G26
35571 G29
T
A
= 25°C unless otherwise specifi ed
1.2
LTC3557/LTC3557-1
ILIM0/ILIM1
0.5A/DIV
0.5A/DIV
0.5A/DIV
0.5A/DIV
5V/DIV
5V/DIV
5V/DIV
WALL
I
20
40
35
30
25
15
10
WALL
I
V
I
0
5
BUS
I
BAT
OUT
BAT
0
Forward Voltage
vs Ideal Diode Current
(with Si2333DS External FET)
V
V
T
V
I
R
R
Switching from 1x to 5x Mode
BAT
BUS
A
WALL Disconnect Waveform
V
I
R
OUT
OUT
BAT
CLPROG
PROG
BAT
PROG
= 25°C
= 3.8V
= 0V
= 50mA
0.2
= 3.75V
= 100mA
= 3.75V
= 2k
= 2k
= 2k
0.4
I
BAT
1ms/DIV
1ms/DIV
(A)
0.6
0.8
35571 G12
35571fc
35571 G27
7
35571 G30
1.0