ltc3787gn Linear Technology Corporation, ltc3787gn Datasheet - Page 5

• Manufacturer Part Number: ltc3787gn
• Description: Ltc3787 - Polyphase Synchronous Boost Controller
• Manufacturer: Linear Technology Corporation

Typical perForMance characTerisTics
LOAD STEP
500mV/DIV
INDUCTOR
CURRENT
5A/DIV
5A/DIV
V
100
100
OUT
20
10
90
80
70
60
50
40
30
99
98
97
96
95
94
93
92
91
90
0
0.01
0
Efficiency and Power Loss
vs Output Current
Efficiency vs Load Current
V
V
LOAD STEP FROM 100mA TO 5A
FIGURE 10 CIRCUIT
Load Step
Burst Mode Operation
V
I
FIGURE 10 CIRCUIT
BURST EFFICIENCY
PULSE-SKIPPING
EFFICIENCY
FORCED CONTINUOUS
MODE EFFICIENCY
IN
OUT
LOAD
IN
= 12V
= 12V
V
= 24V
OUT
= 2A
5
= 12V
OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
0.1
10
200µs/DIV
V
V
FIGURE 10 CIRCUIT
15
IN
OUT
V
= 12V
1
OUT
= 24V
BURST LOSS
PULSE-SKIPPING
LOSS
FORCED CONTINUOUS
MODE LOSS
= 24V
20
3787 G05
3787 G03
10
25
1000
100
10
1
0.1
10000
3787 G01
LOAD STEP
LOAD STEP
500mV/DIV
500mV/DIV
INDUCTOR
INDUCTOR
CURRENT
CURRENT
5A/DIV
5A/DIV
5A/DIV
5A/DIV
V
V
100
0.00001
OUT
OUT
90
80
70
60
50
40
30
20
10
0
Efficiency and Power Loss
vs Output Current
Load Step
Forced Continuous Mode
V
V
LOAD STEP FROM 100mA TO 5A
FIGURE 10 CIRCUIT
Load Step
Pulse-Skipping Mode
V
V
LOAD STEP FROM 100mA TO 5A
FIGURE 10 CIRCUIT
IN
OUT
IN
OUT
= 12V
= 12V
0.0001 0.001
= 24V
= 24V
BURST EFFICIENCY
BURST LOSS
OUTPUT CURRENT (A)
200µs/DIV
200µs/DIV
0.01
V
V
Burst Mode OPERATION
FIGURE 10 CIRCUIT
IN
OUT
= 12V
= 24V
0.1
1
3787 G04
3787 G06
3787 G02
10
1
0.1
10000
1000
100
10
LTC3787
3787fa
5