BA9700A / BA9700AF / BA9700AFV
Regulator ICs
RB100A
Q1 2SB1009
V
IN
V
OUT
D
1
C7 1000p
R810k
SW
1
R
9
330
C4, C5
470µ
×2
GND
R
7
47k
C
4706µ
L
1
220µH
8
10
3
2
Voltage
Regulator
Triangle
Oscillator
2.57V
30k
11
GND
V
ref
13
9
6
1.29V
330
R
6
30k
R
33k
1
ERROR AMP
14
12
+
−
C1
R
2
R
6.8k
3
5
PWM COMPARATOR
7.5k
680p
4
0.047µ
C2
7
1
C3 1µ
L1: RCH-875 220K (Sumida Electronics)
R4
22k
R5 39k
Fig.3 Inverting converter
L1
12V
RB100A
V
IN
V
OUT
D1
22µH
C8 1000p
R1010k
SW
1
R
11
C
7
GND
R
9
100µ
47k
470
C5, C6
470µ
×2
8
10
3
2
Q
1
2SB1009
68
Voltage
Regulator
Triangle
Oscillator
2.57V
30k
11
R
8
Q
2
Vref
2SD1380
13
9
1.29V
R
7
470
GND
30k
R1
39k
R
6
ERROR AMP
470
6
5
+
−
14
12
R2
4.7k
PWM COMPARATOR
R
3
C
1
7.5k
680p
C2
4
0.047µ
7
1
C4 1µ
L1: RCH-875 221K (Sumida Electronics)
R4
20k
R5 39k
Fig.4 Step-up converter
ROHM [ ROHM ]
