LTC3554 LINER [Linear Technology], LTC3554 Datasheet - Page 10

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

50mV/DIV
20mV/DIV
LTC3554
TYPICAL PERFORMANCE CHARACTERISTICS
10
V
V
FSEL
OUT1
OUT2
(AC)
(AC)
Step-Down Switching
Regulator Output Transient
(FSEL Low to High)
V
I
V
I
STBY = L
OUT1
OUT2
OUT1
OUT2
= 100mA
= 50mA
= 3.3V
= 1.2V
50μs/DIV
3554 G29
20mV/DIV
20mV/DIV
V
V
STBY
OUT1
OUT2
(AC)
(AC)
Step-Down Switching
Regulator Output Transient
(STBY High to Low)
V
I
V
I
OUT1
OUT2
OUT1
OUT2
= 5mA
= 5mA
= 3.3V
= 1.2V
50μs/DIV
3554 G30
T
A
= 25°C, unless otherwise specifi ed.
200
180
160
140
120
100
80
60
40
20
0
0
Step-Down Switching Regulator
Dropout Voltage in Standby Mode
vs Load Current
V
V
STBY = H
BVIN
FBx
2
= 780mV
= 2.9V
–45°C
25°C
90°C
4
LOAD CURRENT (mA)
6
8
10
12
3554 G23
3554f
14