XC6365 Datasheet, PDF (11/21 Pages) Torex Semiconductor – PWM Controllde, PWM/PFM Switchable Step-Down DC/DC Converers

■TEST CIRCUITS (Continued)
Circuit 7. XC6365C, XC6366C (when used with a PNP transistor)
XC6365/6366
Series
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 VIN < 2.5V
L : 22μH (CR54, SUMIDA, FOSC=300kHz)
47μH (CR75, SUMIDA, FOSC=180kHz)
10μH (CR54, SUMIDA, FOSC=500kHz)
SD : MA2Q735 (Schottky Diode, MATSUSHITA)
CL :10V, 47μF (Tantalum capacitor, NICHICHEMl MCE)
CIN :16V 10μF (Tantalum capacitor, NICHICHEMI MCE)
PNP Tr. Type
Tr : 2SA1213 (TOSHIBA)
RB : 500Ω(Adjust according to load and Tr. hFE levels)
CB : 2200pF (Ceramic Type)
Set up so that CB≦1 / (2π x RB x FOSC x 0.7)
C, D type (soft-start externally set-up)
CSS : 0.033μF (Ceramic Capacitor)
RSS : 470kΩ(C type), 330kΩ(D type)
B, D type (FB type)
RFB : Set up so that RFB1 / RFB2 = VOUT – 1
(VOUT = setting output voltage),
RFB1 = RFB2 ≦ 2MΩ
CFB : Set up so that fzfb = 1÷(2π x CFB x RFB1) is within
the 0.5 to 20kHz range (10kHz conventional)
Adjustments necessary in respect of L, CL.
e.g. : VOUT = 3.0V
RFB1 = 400kΩ, RFB2 = 200kΩ, CFB = 100pF
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