LTC3708 LINER [Linear Technology], LTC3708 Datasheet - Page 7

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

TYPICAL PERFORMANCE CHARACTERISTICS
500
450
400
350
300
250
200
150
100
50
0
On-Time vs EXTLPF Voltage
1
1.1
20mV/DIV
I
50mV/DIV
ON1
EXTLPF VOLTAGE (V)
0.5A/DIV
10A/DIV
10V/DIV
V
= 30μA
I
V
OUT1
SW1
OUT1
OUT
I
L
1.2
V
V
V
I
Load Transient Response Without
External Synchronization
Discontinuous Mode Operation
OUT
IN
OUT
FCB
f
S
I
= 15V
ON1
= 200kHz
= 20mA
= 5V
= 5V
= 60μA
1.3
3708 G22
10μs/DIV
2μs/DIV
1.4
f
S
= 240kHz
500
450
400
350
300
250
200
150
100
50
0
0.6
On-Time vs INTLPF Voltage
3708 G027
3708 G25
0.8
1
INTLPF VOLTAGE (V)
I
ON2
1.2
= 30μA
1.4
I
1.6
ON2
50mV/DIV
0.2V/DIV
10A/DIV
10V/DIV
PGOOD
2V/DIV
V
= 60μA
I
OUT1
SW1
OUT1
1.8
V
FB
3708 G23
Load Transient Response with
External Synchronization
Power Good Mask
f
2.0
S
= 220kHz
200mV/DIV
10V/DIV
10V/DIV
2A/DIV
V
V
SW1
SW2
V
100μs/DIV
10μs/DIV
I
IN
IN
2-Phase Operation
V
V
V
I
OUT5
IN
OUT1
OUT2
= 15V
f
= I
S
= 5V
= 3.3V
= 220kHz
OUT3
= 2A
3708 G26
3708 G28
1μs/DIV
LTC3708
3708 G024
3708fb
7