ltc3736euf-trpbf Linear Technology Corporation, ltc3736euf-trpbf Datasheet - Page 4

• Manufacturer Part Number: ltc3736euf-trpbf
• Description: Dual 2-phase, No Rsense, Synchronous Controller With Output Tracking
• Manufacturer: Linear Technology Corporation

LTC3736
4
TYPICAL PERFOR A CE CHARACTERISTICS
Tracking Start-Up with Internal
Soft-Start (C
V
R
FIGURE 15 CIRCUIT
100
IN
LOAD1
95
90
85
80
75
70
65
60
55
50
= 5V
1
Efficiency and Power Loss
vs Load Current
FIGURE 15 CIRCUIT
= R
LOAD2
AC-COUPLED
SYNC/FCB = V
100mV/DIV
10
SS
200µs/DIV
= 1Ω
LOAD CURRENT (mA)
2A/DIV
= 0µF)
V
V
OUT
IN
I
= 5V
L
100
Load Step (Pulse Skipping Mode)
V
V
I
SYNC/FCB = 550kHz EXTERNAL CLOCK
FIGURE 17 CIRCUIT
IN
LOAD
IN
OUT
= 3.3V
= 1.8V
= 300mA TO 3A
1000
V
V
V
V
OUT
OUT
OUT
OUT
3736 G06
W
= 3.3V
= 2.5V
= 1.8V
= 1.2V
100µs/DIV
V
2.5V
V
1.8V
500mV/
DIV
3736 G01
OUT1
OUT2
10000
U
10
1
0.1
0.01
0.001
AC-COUPLED
100mV/DIV
Tracking Start-Up with External
Soft-Start (C
V
R
FIGURE 15 CIRCUIT
IN
LOAD1
2A/DIV
= 5V
V
OUT
3736 G04
I
= R
L
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
= 1Ω
40ms/DIV
= 0.15µF)
IN
100µs/DIV
SYNC/FCB = 550kHz
SKIPPING MODE
SYNC/FCB = V
SYNC/FCB = 0V
CONTINUOUS
OPERATION
Burst Mode
3736 G07
FORCED
PULSE
MODE
T
V
2.5V
V
1.8V
500mV/
DIV
OUT1
OUT2
A
IN
= 25°C unless otherwise noted.
3736 G02
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
–5
–1
–2
–3
–4
OUT
1
5
4
3
2
0
I
4µs/DIV
L
2
Oscillator Frequency
vs Input Voltage
Load Step
(Forced Continuous Mode)
V
V
I
SYNC/FCB = 0V
FIGURE 17 CIRCUIT
LOAD
IN
OUT
= 3.3V
3
= 1.8V
= 300mA TO 3A
4
INPUT VOLTAGE (V)
5
100µs/DIV
3736 G05
6
I
1A/DIV
L
7
8
9
3736fa
3736 G08
3736 G03
10