LTC3553 Linear Technology Corporation, LTC3553 Datasheet - Page 8

• Manufacturer Part Number: LTC3553
• Description: Micropower USB Power Manager
• Manufacturer: Linear Technology Corporation

www.DataSheet.in
0.5A/DIV
0.5A/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
LTC3553
8
HPWR
I
I
BUS
BAT
4.204
4.202
4.200
4.198
4.196
4.194
4.192
150
300
250
200
100
50
5V
0A
0A
0
0
0
0
Forward Voltage
vs Ideal Diode Current
Switching from 100mA Mode to
500mA Mode
V
V
I
R
SUSP = LOW
OUT
BAT
PROG
FLOAT
50
= 50mA
= 3.75V
200
= 2k
100
Load Regulation
150
400
I
I
200
V
BAT
1ms/DIV
BAT
BUS
600
(mA)
(mA)
250
= 5V
V
BUS
300
800
= 0V
350
HPWR = H
V
1000
BUS
400
3553 G13
3553 G10
= 5V
3553 G16
1200
450
0.5A/DIV
0.5A/DIV
SUSP
V
I
I
BUS
OUT
BAT
4.250
4.225
4.200
4.175
4.150
3.8V
5V
0V
5V
5V
0A
0A
–75
0
0
Battery Regulation (Float)
Voltage vs Temperature
V
Switching from Suspend Mode to
500mA Mode
V
I
I
HPWR = HIGH
SUSP = LOW
STBY = LOW
V
I
R
HPWR = HIGH
LDO
BUCK
V
I
OUT
BAT
BAT
BUS
BAT
PROG
BUS
–50
= 100mA
= 3.8V
= 50mA
= 2mA
= 3.75V
= 100mA
= 5V
Connect Waveform
= 2k
–25
TEMPERATURE (°C)
0
20μs/DIV
1ms/DIV
25
50
BUCK (1.2V)
LDO (3.3V)
V
BUS
75
V
OUT
100 125
3553 G11
3553 G14
3553 G17
T
A
= 25°C, unless otherwise specifi ed.
1.10
1.00
0.95
1.30
1.25
1.20
1.15
1.05
3.8V
500
400
300
200
100
5V
0V
0
–50 –30 –10
2
Battery Charge Current
vs Battery Voltage
V
I
I
HPWR = HIGH
SUSP = LOW
STBY = LOW
V
LDO
BUCK
Oscillator Frequency
vs Temperature
V
HPWR = H
R
BAT
V
V
BUS
PROG
BUS
BUS
OUT
= 100mA
= 3.8V
2.4
= 100mA
= 5V
= 1.87k
Disconnect Waveform
2.7V
3.8V
5.5V
TEMPERATURE (°C)
2.8
10
100μs/DIV
V
30
BAT
3.2
(V)
50
BUCK (1.2V)
LDO (3.3V)
3.6
70
V
V
OUT
BUS
90
4
110
3553 G12
3553 G18
3553 G15
3553f
4.4
130