LTC3545 LINER [Linear Technology], LTC3545 Datasheet - Page 4

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

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3545/LTC3545-1
100mA/DIV
4
20mV/DIV
0.615
0.610
0.605
0.600
0.595
0.590
0.585
2V/DIV
V
OUT
SW
–50
I
L
V
3.6V, 5.5V
REF
Burst Mode Operation
V
V
I
f
LOAD
OSC
IN
OUT
= 3.6V
= 2.25MHz
vs Temperature at 2.25V,
= 1.8V
= 50mA
0
TEMPERATURE (°C)
1μs/DIV
50
100
2.25V
3.6V
5.5V
3545 G01
3545 G04
150
100
2.0
3.0
2.5
1.5
90
85
80
95
2
2
Switching Frequency vs Supply
Voltage and Temperature
Effi ciency vs Supply Voltage
V
T
CHANNEL 3, ALL OTHERS OFF
f
I
OSC
LOAD
A
OUT
= 25°C
= 2.25MHz
= 2V
= 250mA
3
3
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
4
4
f
f
f
f
OSC
OSC
OSC
OSC
5
5
= –40°C
= 0°C
= 25°C
= 80°C
3545 G02
3545 G05
6
6
–0.2
–0.4
1.2
1.0
0.6
0.2
60
30
20
10
0.8
0.4
50
40
0
0
–50
0
Load Regulation, All Channels
Supply Current vs Temperature
Burst Mode Operation
V
I
CHANNEL 3 ONLY
LOAD
FB3
= 0.625V
= 0mA
200
0
LOAD CURRENT (mA)
TEMPERATURE (°C)
T
V
UNTESTED CHANNELS OFF
PULSE SKIP MODE
A
IN
= 25°C
400
= 3.6V
50
600
100
CHANNEL 1
CHANNEL 2
CHANNEL 3
V
V
V
V
IN
IN
IN
IN
= 5.5V
= 4.5V
= 3.5V
= 2.5V
3545 G06
3545 G03
35451fb
150
800