MB3885 Fujitsu Microelectronics, Inc., MB3885 Datasheet - Page 19

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

PROCESSING WITHOUT USING THE CS TERMINALS
When the soft-start function is not used, the CS terminal (pin 6) should be left open.
OSCILLATOR FREQUENCY SETTING
The oscillator frequency can be set by connecting a timing capacitor (C
resistor (R
OUTPUT VOLTAGE SETTING
Oscillator frequency
fosc (kHz) : =
T
) to the RT terminal (pin 5) .
C
V
R1
R2
O
T
(pF) R
893000
INE
T
CS
FB
(k )
7
8
6
Operation Without Soft-start Setting
"Open"
1.25 V
CS
Error
Amp.
V
O
T
) to the CT terminal (pin 4) and a timing
1.25 V
R2
(R1
R2)
MB3885
19