LTC3775 Linear Technology, LTC3775 Datasheet - Page 5

• Manufacturer Part Number: LTC3775
• Description: High Frequency Synchronous Step-Down Voltage Mode DC/DC Controller
• Manufacturer: Linear Technology

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100mV/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
V
20V/DIV
10A/DIV
10A/DIV
1.206
1.204
1.202
1.200
1.198
1.196
1.194
OUT(AC)
100
I
LOAD
90
80
70
60
50
40
30
20
10
V
0
SW
0.01
I
L
4
Effi ciency vs Load Current
Line Regulation
V
LOAD = 1A
FIRST PAGE CIRCUIT
V
V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
PULSE-SKIPPING
Positive Load Step in Forced
Continuous Mode
V
V
LOAD STEP = 0A TO 10A
MODE/SYNC = 0V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
OUT
IN
OUT
IN
OUT
= 12V
= 12V
= 1.2V
= 1.2V
8
= 1.2V
0.1
MODE
INPUT VOLTAGE (V)
LOAD CURRENT (A)
12
CONTINUOUS
MODE
5μs/DIV
16
1
20
10
24
3775 G02
3775 G01
3775 G07
100
28
100mV/DIV
V
10A/DIV
10A/DIV
20V/DIV
OUT(AC)
100
603
602
601
600
599
598
597
I
90
80
70
60
50
40
LOAD
V
SW
–50
I
Effi ciency vs Input Voltage
4
FB Voltage vs Temperature
L
V
CONTINUOUS MODE
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
Negative Load Step in Forced
Continuous Mode
V
V
LOAD STEP = 10A TO 0A
MODE/SYNC = 0V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
OUT
IN
OUT
–25
= 12V
= 1.2V
8
= 1.2V
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
12
1A LOAD
25
5μs/DIV
16
15A LOAD
50
20
75
100
24
3775 G02
3775 G05
3775 G08
125
28
100mV/DIV
V
10A/DIV
10A/DIV
100mV/DIV
OUT(AC)
V
1.200
I
1.206
1.204
1.202
1.196
1.194
1.198
10A/DIV
10A/DIV
LOAD
OUT(AC)
I
LOAD
I
L
0
I
Load Regulation
Load Step in Forced Continuous
Mode
V
V
LOAD STEP = 0A TO 10A TO 0A
MODE/SYNC = 0V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
L
V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
IN
OUT
Load Step in Pulse-Skipping Mode
IN
V
V
LOAD STEP = 1A TO 11A TO 1A
MODE/SYNC = INTV
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
= 12V
IN
OUT
= 12V
2
= 1.2V
= 12V
= 1.2V
4
LOAD CURRENT (A)
6
50μs/DIV
50μs/DIV
LTC3775
8
CC
10
12
14
3775 G06
3775 G03
5
3775 G09
3775f
16