MB3887 Fujitsu, MB3887 Datasheet - Page 4

• Manufacturer Part Number: MB3887
• Description: DC/DC Converter IC
• Manufacturer: Fujitsu

4
MB3887
PIN DESCRIPTION
Pin No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
VCC (O)
Symbol
OUTC2
OUTC1
−INC2
+INE2
−INE2
−INE1
+INE1
OUTD
−INC1
+INC1
−INE3
+INC2
VREF
GND
VCC
OUT
CTL
FB2
FB1
FB3
VH
CS
RT
I/O
⎯
⎯
⎯
⎯
⎯
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
Current detection amplifier (Current Amp2) input terminal.
Current detection amplifier (Current Amp2) output terminal.
Error amplifier (Error Amp2) non-inverted input terminal.
Error amplifier (Error Amp2) inverted input terminal.
Error amplifier (Error Amp2) output terminal.
Reference voltage output terminal.
Error amplifier (Error Amp1) output terminal.
Error amplifier (Error Amp1) inverted input terminal
Error amplifier (Error Amp1) non-inverted input terminal.
Current detection amplifier (Current Amp1) output terminal.
With IC in standby mode, this terminal is set to “Hi-Z” to prevent loss
of current through output voltage setting resistance.
Set CTL terminal to “H” level to output “L” level.
Current detection amplifier (Current Amp1) input terminal.
Current detection amplifier (Current Amp1) input terminal.
Power supply control terminal.
Setting the CTL terminal at “L” level places the IC in the standby
mode.
Error amplifier (Error Amp3) output terminal.
Error amplifier (Error Amp3) inverted input terminal.
Triangular-wave oscillation frequency setting resistor connection
Power supply terminal for reference power supply and control circuit.
Power supply terminal for FET drive circuit (VH = VCC − 6 V) .
External FET gate drive terminal.
Output circuit power supply terminal.
Soft-start capacitor connection terminal.
Ground terminal.
Current detection amplifier (Current Amp2) input terminal.
terminal.
Descriptions