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XC9220/XC9221

Series

● Output Voltage Setting

Output voltage can be set by adding split resistors. Output voltage is determined by the following equation, based on

should usually be 5kHz. Adjustments are required from 1kHz to 20kHz depending on the application, value of

inductance (L), and value of load capacity (CL).

[Typical examples]

(V)

(kΩ)

(kΩ)

(pF)

(V)

(kΩ)

(kΩ)

(pF)

1.2

100

300

330

3.3

200

75

150

1.5

180

270

180

5.0

150

33

220

1.8

220

220

150

12.0

160

13

180

UP TO 500mA

UP TO 1A

UP TO 2A

UP TO 3A

P-ch MOSFET (*1)

CPH3308

(SANYO)

2SJ616

(SANYO)

2SJ646

(SANYO)

Schottky Barrier Diode

(SBD) (*2)

XB01SB04A2BR

(TOREX)

D1FH3 (SHINDENGEN)

CMS02 (TOSHIBA)

DE5PC3

(SHINDENGEN)

*1: Recommended to use P-ch MOSFET with Ciss less than 1500pF.

*2: SBD should be used with high-toned reverse characteristics.

OUTPUT VOLTAGE

RSENSE (mΩ)

100

50

● Recommended MOSFET and SBD (Examples)

● Ceramic Capacitor

With the XC9220/9221 series, a ceramic capacitor can be used as an output capacitor (CL). RSENSE resistor

is required for using the ceramic capacitor. The value of RSENSE resistor is determined depending on the

setting output voltage as the chart below.

＜External Components＞

P-ch MOSFET: 2SJ646 (SANYO)

SBD: DE5PC3 (SHINDENGEN)

L: CDRH8D28-4R7 (4.7μH, SUMIDA / Fosc=1.0MHz)

CDRH8D43-100 (10μH, SUMIDA / Fosc=500kHz)

CDRH127-220 (22μH, SUMIDA / Fosc=300kHz)

CIN: 22μF (ceramic)

CL: 22μF (ceramic / Fosc=1.0MHz, 500kHz)

47μF (ceramic / Fosc=300kHz)

■OPERATIONAL EXPLANATION (Continued)