MB3889 Fujitsu Microelectronics, Inc., MB3889 Datasheet - Page 12

• Manufacturer Part Number: MB3889
• Description: 2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
• Manufacturer: Fujitsu Microelectronics, Inc.

12
MB3889
330
325
320
315
310
305
300
295
290
285
280
275
270
1.244
1.242
1.240
1.238
1.236
1.234
1.232
1.230
1.228
1.226
1.224
1.222
1.220
1.218
40
30
20
10
10
20
30
40
0
100
0
Error Amplifier, Gain, Phase
Triangular Wave Oscillation Frequency
40
Error Amplifier Threshold Voltage
Power supply voltage V
1 k
Ambient temperature Ta ( C)
vs. Power Supply Voltage
20
vs. Frequency
Frequency f (Hz)
vs. Ambient Temperature
5
10 k
0
100 k
20
A
10
V
Ta
1 M
40
25 C
CC
10 M
(V)
15
60
180
90
0
Ta
RT
CTL
VCC
CTL
90
180
47 k
80
25 C
5 V
5 V
12 V
20
100
IN
10 k
10 k
1 F
1.5
0.5
0.5
1.5
2
1
0
1
2
2.4 k
40
10 k
10 k
Triangular Wave Oscillation Frequency
Ambient temperature Ta ( C)
20
vs. Ambient Temperature
(15)
(13)
4.2 V VCC
1
3
0
1.23 V
240 k
20
(Error Amp2)
12 V
Error Amp1
40
(14)
2
60
OUT
VCC
RT
CTL
(Continued)
80
47 k
5 V
12 V
100