BA9700 ROHM Electronics, BA9700 Datasheet - Page 3

• Manufacturer Part Number: BA9700
• Description: Switching Regulator for DC / DC Converters
• Manufacturer: ROHM Electronics

Regulator ICs
! ! ! ! Timing chart
! ! ! ! Application examples
43k
15k
R
R
1
2
7.5k
R
3
0.047µ
C
2
C
680p
1
GND
COLLECTOR
PWM. COMP
OUTPUT TR.
V
IN
DEAD - TIME
11
13
14
12
OUTPUT
4
ERR. AMP
OUTPUT
2.57V
30k
30k
1.29V
ERROR AMP
Voltage
Regulator
+
−
8
7
47k
R
9
Fig.2 Step-down converter
V
ref
SW
C
R
+
10
4
4
1
1µ
15k
1
C
PWM COMPARATOR
9
BA9700A / BA9700AF / BA9700AFV
1000p
R
5
20k
3
Triangle
Oscillator
Fig.1
2
R
8
15k
9
6
5
470µ
N.C.
N.C.
C
8
L1: RCH-875 121K (Sumida Electronics)
Q
1
R
560
2SB1009
7
R
560
6
RB100A
D
H
L
H
L
1
120µH
L
1
C
5
470µF
, C
×
2
6
5V
GND
V
OUT