MB3785A_03 Datasheet, PDF (4/30 Pages) Fujitsu Component Limited. – Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities)

MB3785A
(Continued)
Pin No.
33
CH4 38
39
14
15
16
17
18
45
42
19
23
20
21
22
Symbol
DTC4
VE4
OUT4
OSCIN
OSCOUT
RT
CT
VCC1
VCC2
GND
VREF
SCP
CTL1
CTL2
CTL3
I/O
Description
I CH4 dead time control terminal.
I CH4 output current setting terminal.
O CH4 totem-pole output terminal.
—
This terminal connects a ceramic resonator.
—
— _{This terminal connects to a resistor for setting the triangular-wave frequency.}
— ^{This terminal connects to a capacitor for setting the triangular-wave frequen-}
cy.
— Power supply terminal for the reference power supply control circuit.
— Power supply terminal for the output circuit.
— GND terminal.
O Reference voltage output terminal.
— This terminal connects to a capacitor for the short-circuit protection circuit.
Power supply circuit and CH1 control terminal.
When this pin is High, the power supply circuit and first channel are in
I active state.
When this pin is Low, the power supply circuit and first channel are in
standby state.
CH2 control terminal.
While the CTL1 terminal is High
I
When this pin is High, the second channel is in active state.
When this pin is Low, the second channel is in the inactive state.
CH3 and CH4 control terminal.
While the CTL1 terminal is High
I
When this pin is High, the third and fourth channels are in active state.
When this pin is Low, the third and fourth channels are in the inactive
state.
4