LTC3708 LINER [Linear Technology], LTC3708 Datasheet - Page 5

• Manufacturer Part Number: LTC3708
• Description: Fast 2-Phase, No RSENSE Buck Controller with Output Tracking
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
10000
1000
100
3.5
3.0
2.0
1.0
0.5
2.5
1.5
10
0
10
Power Loss vs Load Current
On-Time vs I
1
V
IN
= 5V
100
I
10
Soft-Start
ON
ON
LOAD (mA)
CURRENT (μA)
V
1000
OUT
Current
V
OUT
= 1.8V
= 2.5V
100
10000
50ms/DIV
3707 G07
3708 G10
100000
1000
3708 G05
260
240
220
200
180
160
150
300
250
200
100
50
0
–50
5
V
2V/DIV
V
2V/DIV
RUN/SS
5V/DIV
Frequency vs Input Voltage
On-Time vs Temperature
I
5A/DIV
L1
OUT1
OUT2
EXTERNAL SYNCHRONIZATION (ANY I
–25
10
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
25
I
I
I
OUT
I
ON
ON
OUT
15
= 30μA
= 60μA
50
= 15A
= 0A
75
100
6
5
4
3
2
1
0
20
Power Loss vs Input Voltage
5
I
OUT
125
OUT
3708 G08
3708 G11
= 15A
)
150
25
10
INPUT VOLTAGE (V)
–100
–150
–200
200
V
250
150
100
300
250
200
150
100
–50
15
OUT
50
50
0
0
0
0
Frequency vs Load Current
Current Sense Threshold
vs I
= 2.5V
V
OUT
TH
20
0.5
= 1.8V
Voltage
LOAD CURRENT (A)
3708 G06
5
I
FORCED CONTINUOUS MODE
EXTERNAL
SYNCHRONIZATION
DISCONTINUOUS MODE
TH
1
25
VOLTAGE (V)
LTC3708
1.5
V
10
RNG
=
2
3708 G09
3708 G12
1.4V
0.7V
0.5V
3708fb
5
2V
1V
15
2.5