LTC3554 LINER [Linear Technology], LTC3554 Datasheet - Page 9

• 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
100mV/DIV
I
OUT1
150mA
V
0.795
0.785
0.780
0.820
0.815
0.810
0.805
0.800
0.790
OUT1
(AC)
5mA
460
440
420
400
500
480
–75 –50 –25
0.1
Step-Down Switching Regulator
Short-Circuit Current
vs Temperature
Step-Down Switching Regulator
Output Transient
V
STBY = L
Step-Down Switching
Regulator Feedback Voltage
vs Output Current
OUT1
3.8V
5V
STBY = L
STBY = L
= 3.3V
1
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
0
200μs/DIV
25
10
50
75 100
100
125
3554 G19
3554 G27
3554 G21
1000
150
100mA/DIV
I
PWR_ON1
20mV/DIV
OUT2
50mV/DIV
1V/DIV
V
V
V
10μA
OUT2
OUT2
OUT1
(AC)
5mA
0mA
(AC)
0.6
0.2
1.6
1.4
1.2
1.0
0.8
0.4
I
0V
L1
0
–75 –50 –25
Step-Down Switching Regulator
Start-Up Waveform
Step-Down Switching Regulator
Output Transient
Step-Down Switching
Regulator Switch Impedance
vs Temperature
V
STBY = H
V
I
R
STBY = L
OUT2
BV
STBY = L
OUT2
OUT2
OUT1
IN
T
A
= 50mA
= 3.2V
= 1.2V
= 1.2V
= 22Ω
= 25°C, unless otherwise specifi ed.
TEMPERATURE (°C)
0
PMOS
100μs/DIV
50μs/DIV
25
50
NMOS
75 100
125
3554 G20
3554 G26
3554 G28
LTC3554
150
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