13/34

XC9213

Series

1.5

150

300

100

1.8

160

200

100

2.5

360

240

47

3.0

220

110

47

3.3

620

270

27

5.0

300

75

47

SYMBOL

PART NUMBER

MANUFACTURER

CMS02

TOSHIBA

SD1

DE5PC3

SHINDENGEN

XB01SB04A2BR

TOREX

SD2

CRS02

TOSHIBA

■EXTERNAL COMPONENTS (Continued)

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

fzfb= 1 / (2 x

Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load

●Recommended Schottky Diode (SD1, SD2)

* SD1 and SD2 should be of favorable reverse-current characteristics. If, in particular, SD2 has poor reverse-current characteristics,

CBST cannot be fully charged at high temperatures, resulting, in some cases, in failure to drive Tr1.

●Setting Latch Protection Circuit Delay Time (CPRO)

Time delay is 4.7 ms (TYP.) under the current conditions if CPRO has 4,700 pF. This time delay is roughly proportional to

the value of CPRO.

ex.)

When CPRO is 2200pF,

4.7ms (TYP.) x 2200pF /

4700pF

=2.2ms (TYP.)

When CPRO is 0.01μF (10,000pF),

4.7ms (TYP.) x 10000pF / 4700pF

=10ms

(TYP.

)

* For stable operation, please use a capacitor with more than 2200pF as CPRO.

●Setting Soft-Start Time (CSS)

Relationships between the value of

TYP.) are shown at left. For stable

operation, please use a capacitor