LTC3736 LINER [Linear Technology], LTC3736 Datasheet - Page 4

• Manufacturer Part Number: LTC3736
• Description: Dual 2-Phase, No RSENSE Synchronous Controller with Output Tracking
• Manufacturer: LINER [Linear Technology]

Tracking Start-Up with Internal
Soft-Start (C
V
R
FIGURE 15 CIRCUIT
LTC3736
4
TYPICAL PERFOR A CE CHARACTERISTICS
IN
LOAD1
100
= 5V
95
90
85
80
75
70
65
60
55
50
1
= R
Efficiency vs Load Current
FIGURE 15 CIRCUIT
LOAD2
AC-COUPLED
SS
100mV/DIV
200 s/DIV
= 1
10
= 0 F)
LOAD CURRENT (mA)
2A/DIV
V
OUT
I
L
Load Step (Pulse Skipping Mode)
V
V
I
SYNC/FCB = 550kHz EXTERNAL CLOCK
FIGURE 17 CIRCUIT
100
LOAD
IN
OUT
= 3.3V
= 1.8V
= 300mA TO 3A
V
SYNC/FCB = V
V
V
V
V
IN
OUT
OUT
OUT
OUT
3736 G06
1000
= 5V
W
= 3.3V
= 2.5V
= 1.8V
= 1.2V
V
2.5V
V
1.8V
500mV/
DIV
100 s/DIV
OUT1
OUT2
3736 G01
10000
IN
U
AC-COUPLED
100mV/DIV
Tracking Start-Up with External
Soft-Start (C
V
R
FIGURE 15 CIRCUIT
IN
LOAD1
2A/DIV
= 5V
V
OUT
I
3736 G04
L
= R
Load Step (Burst Mode Operation)
V
V
I
SYNC/FCB = V
FIGURE 17 CIRCUIT
LOAD
LOAD2
IN
OUT
= 3.3V
= 1.8V
= 300mA TO 3A
SS
= 1
40ms/DIV
= 0.15 F)
IN
100 s/DIV
SYNC/FCB = 550kHz
SKIPPING MODE
SYNC/FCB = V
SYNC/FCB = 0V
CONTINUOUS
OPERATION
Burst Mode
3736 G07
FORCED
PULSE
MODE
V
2.5V
V
1.8V
500mV/
DIV
T
OUT1
OUT2
A
IN
3736 G02
= 25 C unless otherwise noted.
Inductor Current at Light Load
V
V
I
FIGURE 17 CIRCUIT
LOAD
IN
OUT
= 3.3V
= 1.8V
= 200mA
AC-COUPLED
100mV/DIV
2A/DIV
V
–1
–2
–3
–4
–5
OUT
1
5
4
3
2
0
I
L
4 s/DIV
2
Oscillator Frequency
vs Input Voltage
Load Step
(Forced Continuous Mode)
V
V
I
SYNC/FCB = 0V
FIGURE 17 CIRCUIT
LOAD
IN
OUT
3
= 3.3V
= 1.8V
= 300mA TO 3A
4
INPUT VOLTAGE (V)
5
100 s/DIV
3736 G05
6
I
1A/DIV
7
L
8
9
3736 G08
3736 G03
3736f
10