NB675 –24V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
VIN =20V, VDDQ =1.35V, L=1.2µH, TJ=+25°C, unless otherwise noted.
Load Regulation
95
85
2
3500
3000
V
=6V
1.5
IN
1
75
65
55
45
V
=8.4V
IN
2500
2000
V
=19V
IN
0.5
0
V
=12.6V
IN
V
=19V
IN
V
=12.6V
IN
1500
1000
-0.5
-1
V
=12.6V
IN
V
=8.4V
IN
V
=19V
35
25
15
V
=8.4V
IN
IN
V
=6V
4
IN
500
0
V
=6V
-1.5
-2
IN
0.001 0.01
0.1
1
10
0
1
2
3
4
5
6
7
8
9 10
0
1
2
3
5
6
7
8
9 10
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
I_v_limit vs. Temperature
Switching Frequency
vs. Temperature
Switching Frequency
vs. Output Current
I
=5A
I
=10A
OUT
OUT
600
500
13
12.8
12.6
12.4
12.2
12
520
518
516
514
512
510
508
506
504
502
500
400
300
200
100
0
11.8
11.6
11.4
11.2
11
-40
10
60
110
-50
0
50
100
150
0
2
4
6
8
10
OUTPUT CURRENT (A)
V
LDO Sink Current
VTT LDO Source Current
Load Regulation
TT
Load Regulation
V
DDQ
=1.35V, V =V
TT DDQ
/2
V
=1.35V, V =V /2
TT DDQ
DDQ
0.725
0.715
0.705
0.695
0.685
0.675
0.665
0.655
0.645
0.635
0.625
0.725
0.715
0.705
0.695
0.685
0.675
0.665
0.655
0.645
0.635
0.625
V
TTREF
V
TTREF
V
TT
V
TT
0
500
1000
1500
0
500
1000
1500
V
SINK CURRENT (mA)
V
TT
SOURCE CURRENT (mA)
TT
NB675 Rev. 1.0
1/14/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
6