BD9853AFV Datasheet, PDF (4/17 Pages) Rohm – Single/Dual-output High-frequency Step-down Switching Regulato (Controller type)

BD9853AFV
Technical Note
●Characteristic Data
100
90
80
70
OUTL
60
50
40
30
OUTH
20
10
0
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6
FB VOLTAGE:VFB[V]
Fig.1 FB VOLTAGE VS ON DUTY
180
160
140
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
0.01
0.1
Phase
Gain
1
10
100
1000
FREQUENCY[KHz]
10000 100000
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4
FB VOLTAGE[V]
Fig.2 ERROR AMP OPEN LOOP
Fig.3 FB SINK CURRENT
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4
FB VOLTAGE[V]
Fig.4 FB SOURCE CURRENT
1000
950
900
850
800
750
700
650
600
VCC=12V,18V
550
500
450
400
4
350
300
250
200
150
VCC=4.5V
100
50
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
(REGB-OUTH) VOLTAGE[V]
Fig.5 OUTH SINK CURRENT
1000
950
900
850
800
750
700
650
600
550
500
VCC=12V,18V
450
400
350
300
250
200
VCC=4.5V
150
100
50
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
(VCC-OUTH) VOLTAGE:[V]
Fig.6 OUTH SOURCE CURRENT
1000
950
900
850
800
750
700
650
600
550
VCC=12V,18V
500
450
400
350
300
250
200
150
VCC=4.5V
100
50
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
(OUTL-GND) VOLTAGE[V]
Fig.7 OUTL SINK CURRENT
1000
950
900
850
800
750
700
650
VCC=12V,18V
600
550
500
450
400
350
300
VCC=4.5V
250
200
150
100
50
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
(REGA-OUTL) VOLTAGE[V]
Fig.8 OUTL SOURCE CURRENT
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2009.05 - Rev.A