ltc3773euhf-trpbf Linear Technology Corporation, ltc3773euhf-trpbf Datasheet - Page 5

• Manufacturer Part Number: ltc3773euhf-trpbf
• Description: Triple Output Synchronous 3-phase Dc/dc Controller With Up/down Tracking
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
–0.5
–1.0
–1.5
–2.0
–2.5
100
100
2.5
2.0
1.5
1.0
0.5
90
80
70
60
50
40
30
20
10
95
85
80
75
90
0
0
0.001
0
0
Effi ciency vs Load Current,
Shutdown CH2 and CH3
V
f
Effi ciency vs V
Shutdown CH2 and CH3
Line Regulation
PLLFLTR = 5V
PLLFLTR FLOATS
PLLFLTR = 0V
SW
V
SHUTDOWN CH2 AND CH3
V
IN
f
f
f
CC
CC
SW
SW
SW
= 12V, V
= 220kHz
= 5V, V
= 5V, V
= 560kHz
= 400kHz
= 220kHz
0.01
CHANNEL 1 LOAD CURRENT (A)
5
5
CC
OUT
OUT1
= 5V, V
= 2.5V, I
Burst Mode
OPERATION
0.1
10
10
= 2.5V, I
IN
DISCONTINUOUS
MODE
V
IN
OUT1
V
(V)
OUT
IN
OUT1
15
15
(V)
= 2.5V
1
= 5A
CONTINUOUS
MODE
= 5A
EFFICIENCY
POWER LOSS
EFFICIENCY
POWER LOSS
20
10
20
3773 G05
3773 G03
3773 G01
100
25
25
4.0
3.2
1.6
0.8
0.0
1.0
0.8
0
–0.2
–0.4
–0.6
–0.8
–1.0
10000
1000
100
10
1
0.1
2.4
0.6
0.4
0.2
100
–15
–20
–25
–10
90
80
70
60
50
40
30
20
10
25
10
20
15
–5
0
0.001
5
0
5
0
0
Current Limit vs V
Effi ciency vs Load Current,
Power-Up CH2 and CH3
V
V
f
0
Load Regulation
SW
IN
OUT2
V
V
CC
IN
= 12V, V
= 220kHz
= 12V, V
= 5V, V
= 1.8V (NO LOAD), V
0.01
CHANNEL 1 LOAD CURRENT (A)
CONTINUOUS MODE
DISCONTINUOUS MODE
Burst Mode OPERATION
5
5
CC
OUT
LOAD CURRENT (A)
CC
= 5V, V
0.1
= 5V, V
= 2.5V, f
10
Burst Mode
OPERATION
V
IN
OUT1
10
OUT
(V)
IN
SW
DISCONTINUOUS
MODE
OUT3
15
1
= 2.5V
= 2.5V
= 220kHz
R
R
SENSE
SENSE
CONTINUOUS
MODE
EFFICIENCY
POWER LOSS
= 1.2V (NO LOAD)
15
10
20
= 3mΩ
= 5mΩ
3773 G06
3773 G04
LTC3773
3773 G02
100
25
20
10000
1000
100
10
1
0.1
0.2
0.0
–0.2
–0.8
–0.4
–0.6
–1.0
3773fb
5