LTC3554 LINER [Linear Technology], LTC3554 Datasheet - Page 8

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

0.5A/DIV
0.5A/DIV
LTC3554
TYPICAL PERFORMANCE CHARACTERISTICS
Burst Mode is a registered trademark of Linear Technology Corporation.
8
HPWR
I
I
BUS
BAT
100
100
90
80
70
60
50
40
30
20
10
5V
0A
0A
90
80
70
60
50
40
30
20
10
0
0.01
0.01
0
0
Step-Down Switching Regulator 2
1.2V Output Effi ciency vs I
Switching from 100mA Mode to
500mA Mode
Step-Down Switching Regulator 1
3.3V Output Effi ciency vs I
V
I
R
OUT
BAT
PROG
FSEL = L
STBY = L
FSEL = L
STBY = L
= 50mA
= 3.75V
= 2k
0.1
0.1
I
I
1
1
OUT2
OUT1
1ms/DIV
(mA)
(mA)
10
10
100
100
OUT2
OUT1
3554 G24a
3.8V
5V
3554 G25
3554 G14
3.8V
5V
1000
1000
0.5A/DIV
0.5A/DIV
SUSP
V
I
I
OUT
BUS
BAT
100
15
5V
5V
0A
0A
35
30
25
20
10
90
80
70
60
50
40
30
20
10
5
0
0
0
0
0.01
2.5
Switching from Suspend Mode to
500mA Mode
V
I
R
Step-Down Switching Regulator 1
2.5V Output Effi ciency vs I
Burst Mode
Current Per Enabled Step-Down
Switching Regulator
OUT
BAT
NO LOAD
STBY = L
PROG
FSEL = L
STBY = L
= 50mA
= 3.75V
3
= 2k
0.1
BV
IN
3.5
SUPPLY VOLTAGE (V)
®
I
1
BV
OUT1
1ms/DIV
IN
4
(mA)
Supply
10
4.5
100
OUT1
5
–45°C
25°C
90°C
3554 G15
3.8V
5V
3554 G31
3554 G17
T
A
1000
5.5
= 25°C, unless otherwise specifi ed.
100
1.5
0.5
2.2
2.1
2.0
1.9
3.0
2.5
2.0
1.0
2.6
2.5
2.4
2.3
30
20
10
90
80
70
60
50
40
0
0
0.01
–75 –50 –25
2.5
Oscillator Frequency
vs Temperature
Step-Down Switching Regulator 2
1.8V Output Effi ciency vs I
Standby Mode BV
Current Per Enabled Step-Down
Switching Regulator
NO LOAD
STBY = H
FSEL = L
STBY = L
3
0.1
2.7V
3.8V
5.5V
BV
IN
TEMPERATURE (°C)
3.5
0
SUPPLY VOLTAGE (V)
I
1
OUT2
25
4
(mA)
50
IN
10
Supply
4.5
75 100
100
OUT2
5
–45°C
25°C
90°C
125
3.8V
5V
3554 G32
3554 G18
3554 G16
3554f
1000
150
5.5