Datasheet

LTC3786
5
3786fc
For more information www.linear.com/LTC3786
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Input Voltage
Load Step
Forced Continuous Mode
Load Step
Burst Mode Operation
Load Step
Pulse-Skipping Mode Inductor Current at Light Load Soft Start-Up
Efficiency and Power Loss
vs Output Current
Efficiency and Power Loss
vs Output Current
OUTPUT CURRENT (A)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10
3786 G01
30
20
10
0
90
100
10
100
1000
1
0.1
10000
CCM EFFICIENCY
CCM LOSS
BURST EFFICIENCY
BURST LOSS
PULSE-SKIPPING EFFICIENCY
PULSE-SKIPPING LOSS
V
IN
= 12V
V
OUT
= 24V
FIGURE 8 CIRCUIT
OUTPUT CURRENT (A)
0.010.0010.00010.00001
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10
3786 G02
30
20
10
0
90
100
10
100
1000
1
0.1
10000
V
IN
= 12V
V
OUT
= 24V
Burst Mode OPERATION
FIGURE 8 CIRCUIT
BURST
EFFICIENCY
BURST
LOSS
INPUT VOLTAGE (V)
0
98
99
100
20
3786 G03
97
96
5 10 15 25
95
94
93
EFFICIENCY (%)
V
OUT
= 12V
V
OUT
= 24V
I
LOAD
= 2A
FIGURE 8 CIRCUIT
LOAD STEP
2A/DIV
V
OUT
500mV/DIV
200µs/DIV
3786 G04
V
IN
= 12V
V
OUT
= 24V
LOAD STEP FROM 200mA TO 2.5A
FIGURE 8 CIRCUIT
INDUCTOR
CURRENT
5A/DIV
LOAD STEP
2A/DIV
V
OUT
500mV/DIV
200µs/DIV
3786 G05
V
IN
= 12V
V
OUT
= 24V
LOAD STEP FROM 200mA TO 2.5A
FIGURE 8 CIRCUIT
INDUCTOR
CURRENT
5A/DIV
LOAD STEP
2A/DIV
V
OUT
500mV/DIV
200µs/DIV
3786 G06
V
IN
= 12V
V
OUT
= 24V
LOAD STEP FROM 200mA TO 2.5A
FIGURE 8 CIRCUIT
INDUCTOR
CURRENT
5A/DIV
Burst Mode
OPERATION
5A/DIV
PULSE-
SKIPPING MODE
5µs/DIV
3786 G07
V
IN
= 12V
V
OUT
= 24V
I
LOAD
= 200µA
FIGURE 8 CIRCUIT
FORCED
CONTINUOUS
MODE
V
OUT
5V/DIV
0V
2ms/DIV
3786 G08
V
IN
= 12V
V
OUT
= 24V
FIGURE 8 CIRCUIT
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.