XC6365/6366
Series
■TEST
CIRCUITS (Continued)
Circuit 7. XC6365C, XC6366C (when used with a PNP transistor)
Circuit 8. XC6365D, XC6366D (when used with a PNP transistor)
Recommended Components
Tr : XP162A12A6PR (Torex P-channel Power MOSFET)
Please use a PNP transistor where V
IN
< 2.5V
L
: 22μH (CR54, SUMIDA, FOSC=300kHz)
47μH (CR75, SUMIDA, FOSC=180kHz)
10μH (CR54, SUMIDA, FOSC=500kHz)
SD : MA2Q735 (Schottky Diode, MATSUSHITA)
C
L
:10V, 47μF (Tantalum capacitor, NICHICHEMl MCE)
C
IN
:16V 10μF (Tantalum capacitor, NICHICHEMI MCE)
PNP Tr. Type
Tr : 2SA1213 (TOSHIBA)
R
B
: 500Ω(Adjust according to load and Tr. hFE levels)
C
B
: 2200pF (Ceramic Type)
Set up so that
C
B
≦
1 / (2
π
x R
B
x FOSC x 0.7)
C, D type (soft-start externally set-up)
C
SS
: 0.033μF (Ceramic Capacitor)
R
SS
: 470kΩ(C type), 330kΩ(D type)
B, D type (FB type)
R
FB
: Set up so that
R
FB1
/ R
FB2
= V
OUT
– 1
(V
OUT
= setting output voltage),
R
FB1
= R
FB2
≦
2M
Ω
C
FB
: Set up so that
fzfb = 1
÷
(2
π
x C
FB
x R
FB1
)
is within
the 0.5 to 20kHz range (10kHz conventional)
Adjustments necessary in respect of L, C
L
.
e.g. : V
OUT
= 3.0V
R
FB1
= 400kΩ, R
FB2
= 200kΩ, C
FB
= 100pF
713
TOREX [ TOREX SEMICONDUCTOR ]
