LTC3554 LINER [Linear Technology], LTC3554 Datasheet - Page 7

• Manufacturer Part Number: LTC3554
• Description: Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
4.198
4.196
4.194
4.192
4.204
4.202
4.200
300
250
200
150
100
0.35
0.30
0.25
0.20
0.50
0.45
0.40
50
0
Forward Voltage
vs Ideal Diode Current
0
–75 –50 –25
0
V
R
vs Temperature
FLOAT
ON
I
OUT
50
200
from V
= 200mA
100
Load Regulation
150
400
TEMPERATURE (°C)
BUS
0
I
200
I
BAT
V
BAT
BUS
to V
25
600
(mA)
(mA)
250
= 5V
V
50
OUT
BUS
300
800
= 0V
75 100
350
HPWR = H
V
1000
BUS
400
3554 G08
125
= 5V
3554 G11
3554 G05a
1200
450
150
0.5A/DIV
0.5A/DIV
V
V
4.250
4.225
4.200
4.175
4.150
I
I
BUS
OUT
BUS
BAT
480
400
320
240
160
80
–75
0
5V
5V
0A
0A
–75
0
0
Charge Current vs Temperature
(Thermal Regulation)
Battery Regulation (Float)
Voltage vs Temperature
V
I
V
HPWR = H
R
BAT
V
V
I
R
BUS
BUS
PROG
OUT
–50
BAT
–50
PROG
BUS
= 2mA
= 5V
= 5V
= 100mA
= 3.75V
= 1.87k
–25
–25
Connect Waveform
= 2k
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
25
1ms/DIV
25
50
50
75 100 125
75
100 125
3554 G08
3554 G06
3554 G12
150
T
A
= 25°C, unless otherwise specifi ed.
0.5A/DIV
0.5A/DIV
300
100
300
100
500
400
200
600
500
400
200
0
0
V
V
I
2
I
BUS
OUT
BUS
BAT
0
I
Battery Charge Current and
Voltage vs Time
BAT
920mAhr CELL
V
R
V
HPWR = H
R
BUS
PROG
BUS
PROG
5V
5V
0A
0A
0
0
1
vs V
2.4
= 5V
= 5V
V
V
I
R
OUT
= 1.87k
= 1.87k
BAT
BUS
PROG
2
BAT
= 100mA
= 3.75V
2.8
Disconnect Waveform
= 2k
3
TIME (hour)
V
C/10
BAT
3.2
4
(V)
SAFETY TIMER
TERMINATION
50μs/DIV
CHRG
LTC3554
V
I
BAT
BAT
5
3.6
6
4
7
3554 G10
3554 G07
4.4
8
7
3
2
1
0
3554 G13
6
5
4
3554f