XC9303 Datasheet, PDF (6/18 Pages) Torex Semiconductor – Step-Up & Down DC / DC Controller ICs

XC9303 Series
High Efficiency, Synchronous
Step-Up & Down DC / DC Controller ICs
" HOW TO USE
<Setting of Output Voltage>
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of
RFB11(RFB21) and RFB12(RFB22). The sum of RFB11(RFB21) and RFB12(RFB22) should normally be 1 MΩ or less.
VOUT = 0.9 × ( RFB11 + RFB12 ) / RFB12
The value of CFB1(CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2 × π × CFB1 × RFB11) which is equal to 12kHz.
Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load capacity (CL).
[Example of Calculation]
[Typical Example]
When RFB11 = 200kΩ and RFB12 = 75kΩ, VOUT1 = 0.9 × ( 200K + 75k ) / 75k = 3.3V.
VOUT
(V)
RFB11
(kΩ)
RFB12
(kΩ)
CFB1
(pF)
VOUT
(V)
RFB11
(kΩ)
RFB12
(kΩ)
2.0
330
270
39
3.3
200
75
2.2
390
270
33
5.0
82
18
2.5
390
220
33
2.7
360
180
33
3.0
560
240
24
CFB1
(pF)
62
160
[External Components]
Tr 1 : CPH6315 (Pch MOSFET : SANYO), IRLM6702 (Pch MOSFET : IR)
Tr 2 : CPH3409 (Nch MOSFET : SANYO), IRLM1902 (Nch MOSFET : IR)
Tr 3 : CPH3409 (Nch MOSFET : SANYO), IRLM2502 (Nch MOSFET : IR)
Note : VGS Breakdown Voltage of CHPH6315 and CPH3409 is 10V so please be careful with the power supply voltage.
For the power supply voltage more than 8V, CPH3308 (Pch MOSFET : SANYO) or CPH3408 (Nch MOSFET :
SANYO) which breakdown voltage is 20V are recommended.
L : 22µH
CL : 16V, 47µF x 2
(SUMIDA CDRH127 / LD)
(NICHICEMI Tantalum MCE Series)
CIN : 16V, 47µF
SD : CMS02
(NICHICEMI Tantalum MCE Series)
(TOSHIBA, Schottky Barrier Diode)
" EXTERNAL COMPONENTS
$ COIL
PART NUMBER MANUFACTURER
CDRH127 / LD-220
SUMIDA
L VALUE (µH)
22
SERIAL
RATED CURRENT
RESISTANCE (Ω)
(A)
36.4 m
4.7
W x L (mm)
12.3 x 12.3
H (mm)
8
$ INPUT / OUTPUT CAPACITANCE
PART NUMBER MANUFACTURER
16MCE476MD2
NICHICHEMI
VOLTAGE (V)
16.0
CAPACITANCE
(µF)
47
W x L (mm)
4.6 x 5.8
H (mm)
3.2±0.2
$ SCHOTTKY BARRIER DIODE
PART NUMBER MANUFACTURER
CMS02
TOSHIBA
REVERSE
CURRENT
30
FORWARD
CURRENT
3
Vfmax (V)
0.4 (IF=3A)
Irmax (A)
0.5m (VR=30V)
W x L (mm)
2.4 x 4.7
H (mm)
0.98±0.1
$ TRANSISTOR
PART NUMBER
CPH6315
CPH3308
IRLMS6702
(Pch MOSFET)
MANUFACTURER
SANYO
SANYO
IR
ABSOLUTE MAX. RATINGS
VDSS (V) VGSS (V) ID (A)
- 20
±10
-3
- 30
±20
-4
- 20
±12
- 2.3
Rds (ON)
MAX.(mΩ)
150 (VDS= - 4.0V)
140 (VDS= - 4.0V)
200 (VDS= - 4.5V)
Cisss typ (pF)
410 (VDC= - 10V)
560 (VDC= - 10V)
210 (VDC= - 15V)
VGS (off) (V)
- 1.4 (MAX.)
- 2.4 (MAX.)
- 0.7 (MAX.)
PKG.
CPH6
CPH3
Micro6
$ TRANSISTOR
PART NUMBER
CPH3409
CHP3408
(Nch MOSFET)
MANUFACTURER
SANYO
SANYO
ABSOLUTE MAX. RATINGS
VDSS (V) VGSS (V) ID (A)
30
±10
5
30
±20
5
Rds (ON)
MAX.(mΩ)
42 (VDS=4.0V)
68 (VDS=4.0V)
Cisss typ (pF)
630 (VDC= 10V)
480 (VDC= 10V)
VGS (off) (V)
1.3 (MAX.)
2.4 (MAX.)
PKG.
CPH6
CPH3
6
Semiconductor Ltd.