MB3885 Fujitsu Microelectronics, Inc., MB3885 Datasheet - Page 11

• Manufacturer Part Number: MB3885
• Description: 1-channel Dc/dc Converter Ic With Synchronous Rectifier
• Manufacturer: Fujitsu Microelectronics, Inc.

100 k
10 M
10 k
1 M
250
240
230
220
210
200
190
180
170
160
150
1 k
10
0
Triangular Wave Oscillator Frequency vs.
Triangular Wave Oscillator Frequency vs.
40
20
20
40
0
1 k
Error Amp Gain, Phase vs. Frequency
100
5
Timing capacitor C
Timing Capacitor
Supply voltage V
10 k
Supply Voltage
Frequency f (Hz)
1000
10
100 k
CC
T
(pF)
(V)
10000
A
Ta
RT
CT
V
15
Ta
VCC
CTL
RT
1 M
Ta
10 k
470 pF
25 C
10 k
25 C
5 V
12 V
25 C
100000
20
10 M
180
90
0
90
180
100 k
10 M
10 k
1 M
100
250
240
230
220
210
200
190
180
170
160
150
IN 10 F
1 k
4.7 k
4.7 k
1 k
40
Triangular Wave Oscillator Frequency vs.
Triangular Wave Oscillator Frequency vs.
20
2.4 k
1.5 V
Ambient temperature Ta ( C)
Ambient Temperature
Timing resistor R
0
Timing Resistor
8
6
VCC
20
1.25 V
240 k
10 k
12 V
40
T
Error Amp.
( )
CTL
7
60
VCC
RT
CT
CTL
CTL
MB3885
Ta
VCC
CTL
OUT
15000 pF
10 k
470 pF
80
150 pF
470 pF
12 V
25 C
(Continued)
5 V
12 V
100 k
100
11