LTC3545 LINER [Linear Technology], LTC3545 Datasheet - Page 5

• Manufacturer Part Number: LTC3545
• Description: Triple 800mA Synchronous Step-Down Regulator-2.25MHz
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
100mV/DIV
500mA/DIV
500mA/DIV
450
400
350
300
250
200
150
V
I
LOAD
OUT1
–50
Supply Current vs Temperature,
Pulse Skipping
I
L
V
I
CHANNEL 3 ONLY
LOAD
FB3
T
V
V
LOAD STEP 0mA TO 600mA
Burst Mode OPERATION
Channel 1 Load Step Response
A
IN
OUT
= 25°C
= 0.625V
= 3.6V
= 0mA
= 1.2V
0
TEMPERATURE (°C)
10μs/DIV
50
100
V
V
V
V
IN
IN
IN
IN
= 5.5V
= 4.5V
= 3.5V
= 2.5V
3545 G07
150
3545 G10
100mV/DIV
500mA/DIV
500mA/DIV
100
V
90
80
70
60
50
40
30
20
10
I
OUT2
LOAD
0
0.1
Effi ciency vs Load Current,
Burst Mode Operation
I
L
T
V
CHANNEL 3, OTHER CHANNELS OFF
f
OSC
A
OUT
Channel 2 Load Step Response
T
V
V
LOAD STEP 0mA TO 600mA
Burst Mode OPERATION
= 25°C
A
IN
OUT
= 2.25MHz
= 25°C
= 1.8V
= 3.6V
V
V
V
= 1.5V
IN
IN
IN
1
= 2.7V
= 3.6V
= 4.2V
LOAD CURRENT (mA)
10
10μs/DIV
100
3545 G08
1000
3545 G11
LTC3545/LTC3545-1
100mV/DIV
500mA/DIV
500mA/DIV
100
V
I
90
80
70
60
50
40
30
20
10
LOAD
OUT3
0
0.1
I
Effi ciency vs Load Current,
Pulse Skipping Operation
L
Channel 3 Load Step Response
T
V
V
LOAD STEP 0mA TO 600mA
Burst Mode OPERATION
A
IN
OUT
= 25°C
= 3.6V
= 1.8V
T
V
CHANNEL 3, OTHER CHANNELS OFF
f
OSC
A
OUT
1
LOAD CURRENT (mA)
= 25°C
= 2.25MHz
= 1.8V
10μs/DIV
10
100
V
V
V
IN
IN
IN
= 2.7V
= 3.6V
= 4.2V
3545 G09
35451fb
5
1000
3545 G12