BD9E302EFJ Datasheet, PDF (27/44 Pages) Rohm – Integrated MOSFET Single Synchronous Buck DC/DC Converter

BD9E302EFJ
 Application Example 4 (Fast load response)
Parameter
Input Voltage
Output Voltage
Switching Frequency
Maximum Output Current
Operating Ambient Temperature Range
Symbol
VIN
VOUT
FOSC
IOMAX
Topr
Value Example
12/24 V
3.3 V
550kHz(Typ)
3A
-40 °C ~ +85°C
Datasheet
BD9E302EFJ
Figure 65. Application Circuit 4
Reference
Designator
R1
R2
R3
C1
C2
CBOOT
CIN1(Note ¹⁾
CIN(Note ²⁾
COUT(Note ³⁾
L
Configuration
(mm)
1005
1005
1005
1005
1005
1608
1608
3225
3225
7269
Table 5. Recommendation Circuit constants
Specification
75 kΩ, 1 %, 1 / 16 W
24 kΩ, 1 %, 1 / 16 W
10 kΩ, 5 %, 1 / 16 W
100 pF CH, 50 V
6800 pF R, 50 V
0.1 μF, B, 50 V
0.1 μF, B, 50 V
10 μF, B, 50 V
22 μF B, 25 V × 2
3.3μH
Part Number
MCR01MZPF7502
MCR01MZPF2402
MCR01MZPJ103
GRM series
GRM series
GRM series
GRM series
GRM series
GRM series
CLF7045NIT-3R3N
Type
Chip resistor
Chip resistor
Chip resistor
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Inductor
Manufacturer
ROHM
ROHM
ROHM
MURATA
MURATA
MURATA
MURATA
MURATA
MURATA
TDK
(Note 1) In order to reduce the influence of high frequency noise, arrange the 0.1μF ceramic capacitor as close as possible to the VIN pin.
(Note 2) For capacitance of input capacitor, take temperature characteristics, DC bias characteristics, etc. into consideration to set minimum value to no less
than 4.7μF.
(Note 3) In case capacitance value fluctuates due to temperature characteristics, DC bias characteristics, etc. of output capacitor, crossover frequency may
fluctuate. When selecting a capacitor, confirm the characteristics of the capacitor in its datasheet.Also, Please use capacitors such as ceramic type
are recommended for output capacitor.
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27.Apr.2016 Rev.002