LTC3736-2 Linear Technology, LTC3736-2 Datasheet - Page 4

• Manufacturer Part Number: LTC3736-2
• Description: Synchronous Controller
• Manufacturer: Linear Technology

AC-COUPLED
LTC3736-2
500mV/
4
TYPICAL PERFOR A CE CHARACTERISTICS
100mV/DIV
DIV
2A/DIV
V
Tracking Start-Up with Internal
Soft-Start (C
OUT
V
R
FIGURE 15 CIRCUIT
IN
LOAD1
I
L
= 5V
Load Step (Pulse-Skipping Mode)
V
V
I
SYNC/FCB = V
FIGURE 15 CIRCUIT
LOAD
IN
OUT
= R
= 3.3V
= 1.8V
= 300mA TO 3A
LOAD2
100
SS
95
90
85
80
75
70
65
60
55
50
200µs/DIV
= 1Ω
IN
1
= 0µF)
Efficiency and Power Loss
vs Load Current
V
100µs/DIV
OUT
= 2.5V
10
LOAD CURRENT (mA)
EFFICIENCY
W
37362 G06
100
U
37362 G04
V
2.5V
V
1.8V
OUT1
OUT2
POWER LOSS
AC COUPLED
1000
500mV/
V
V
50mV/DIV
IN
IN
5V/DIV
2A/DIV
DIV
= 3.3V
= 5V
37362 G01
V
OUT
SW
Tracking Start-Up with External
Soft-Start (C
10000
V
R
FIGURE 15 CIRCUIT
I
L
IN
LOAD1
Light Load
(Pulse-Skipping Mode)
V
V
I
SYNC/FBC = V
FIGURE 15 CIRCUIT
LOAD
= 5V
IN
OUT
10
1
0.1
0.01
0.001
= 5V
= R
= 2.5V
= 300mA
LOAD2
SS
IN
40ms/DIV
= 1Ω
= 0.10µF)
2.5µs/DIV
AC-COUPLED
100mV/DIV
2A/DIV
V
OUT
I
L
T
37362 G07
A
V
V
I
SYNC/FCB = 0V
FIGURE 15 CIRCUIT
Load Step
(Forced Continuous Mode)
LOAD
IN
OUT
= 25°C unless otherwise noted.
37362 G02
= 3.3V
= 1.8V
= 300mA TO 3A
V
2.5V
V
1.8V
OUT1
OUT2
AC COUPLED
50mV/DIV
5V/DIV
2A/DIV
100µs/DIV
V
–1
–2
–3
–4
–5
1
OUT
5
4
3
2
0
SW
I
L
2
Oscillator Frequency
vs Input Voltage
Light Load
(Forced Continuous Mode)
V
V
I
SYNC/FCB = 0V
FIGURE 15 CIRCUIT
LOAD
IN
OUT
3
= 5V
= 2.5V
= 300mA
4
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INPUT VOLTAGE (V)
5
37362 G03
2.5µs/DIV
6
7
8
9
37368 G08
37362fa
37362 G05
10