Dual Synchronous Buck Converter - BD93291EFJThe BD93291EFJ is a dual synchronous buck converter.It integrates wide input voltage range (8.0V to 26V) synchronous buck converter and low input voltage (Vout1 : 5.0V) synchronous buck converter. The IC also incorporates a new technology called H3RegTM, a Rohm proprietary control method which facilitates ultra-high transient response against changes in load. SLLM (Simple Light Load Mode) technology is also integrated to improve efficiency when powering lighter loads. For protection and ease of use, the IC also incorporates soft start. Space-saving and high efficient switching regulator can be achieved due to built-in N-MOSFET power transistor in HTSOP-J8 package.
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| * This product is a STANDARD grade product and not recommend for on-vehicle devices. | ||||
| Grade | Standard |
| ch | 2 |
| Integrated FET / Controller | Integrated FET |
| Buck / Boost / Buck-Boost / Inverting | Buck |
| Synchronous / Nonsynchronous | Synchronous |
| Vin1(Min.)[V] | 8.0 |
| Vin1(Max.)[V] | 26.0 |
| Vout1(Min.)[V] | 4.925 |
| Vout1(Max.)[V] | 5.075 |
| Iout1(Max.)[A] | 1.7 |
| Vin2(Min.)[V] | 5.0 |
| Vin2(Max.)[V] | 5.0 |
| Vout2(Min.)[V] | 0.8 |
| Vout2(Max.)[V] | 4.0 |
| Iout2(Max.)[A] | 0.5 |
| SW frequency(Max.)[MHz] | 2.5 |
| Light Load mode | Yes |
| EN | Yes |
| PGOOD | No |
| Operating Temperature (Min.)[°C] | -40 |
| Operating Temperature (Max.)[°C] | 85 |
- ・ Dual Synchronous Buck Converter in small package.
・ standby mode ( Istandby = 0uA )
・ High Voltage Synchronous Buck Converter(Vout1)
- Wide input range(8.0V to 26V) *absolute voltage 30V
- H3RegTM DC/DC Converter Controller included
- Output Current 1.7A *1
- FET on resistance High-side 0.175Ω/Low-side 0.175Ω
- Internal soft-start function
- Switching Frequency 300 to 600kHz
(*According to input/output conditions)
- Fixed output voltage (5.0V ± 1.5%; Normal Mode)
・ Low Voltage Synchronous Buck Converter(Vout2)
- Input voltage range 5.0V(VOUT1)
- H3RegTM DC/DC Converter Controller included
- Output Current 0.5A *1
- FET on resistance High-side 0.25Ω/Low-side 0.25Ω
- Internal soft-start function
- Switching Frequency 1.5M to 2.5MHz
(*According to input/output conditions)
- Feedback voltage (0.8V ± 1.5%; Normal Mode)
・ Protection Circuits
Under Voltage Lockout Protection
Thermal Shutdown
Over Current Protection
・ HTSOP-J8 Package with Exposed thermal PAD.
Capacitor Calculation for Buck converter IC
Inductor Calculation for Buck converter IC
Resistor Value Table to set Output Voltage of Buck Converter IC
Thermal Resistance
PCB Layout Techniques of Buck Converter
The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit
Calculation of Power Loss (Synchronous)
Considerations for Power Inductors Used for Buck Converters
Snubber Circuit for Buck Converter IC
Efficiency of Buck Converter
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