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8-35V 1.5A 1ch Buck converter - BD9870FPS

The BD9870FPS single-channel step-down switching regulator incorporates a Pch MOSFET capable of PWM operation at 900kHz, enabling use of a smaller coil, as well as circuitry that eliminates the need for external compensation - only a diode, coil, and ceramic capacitor are required - reducing board size significantly.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BD9870FPS-E2 Active TO252S-5 2000 2000 Taping Yes
 
Specifications:
Grade Standard
ch 1
Integrated FET / Controller Integrated FET
Buck / Boost / Buck-Boost / Inverting Buck
Synchronous / Nonsynchronous Nonsynchronous
Vin1(Min.)[V] 8.0
Vin1(Max.)[V] 35.0
Vout1(Min.)[V] 1.0
Vout1(Max.)[V] 28.0
Iout1(Max.)[A] 1.5
SW frequency(Max.)[MHz] 0.9
Light Load mode No
EN Yes
PGOOD No
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
Features:
  • ・Maximum switching current : 1.5A
    ・Built-in Pch FET ensures high efficiency
    ・Output voltage adjustable via external resistors
    ・High switching frequency : 900kHz (fixed)
    ・Soft start time : 5ms (fixed)
    ・Overcurrent and thermal shutdown protection circuits built in
    ・ON / OFF control via STBY pin
    ・Ceramic output capacitor compatibility
    ・Small surface mount TO252S-5 package
 
 
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Technical Data
Application Note

Thermal Resistance

Application Note

Calculation of Power Loss (Synchronous)

Application Note

Thermal Resistance

Application Note

Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)

Application Note

Resistor Value Table to set Output Voltage of Buck Converter IC

Application Note

PCB Layout Techniques of Buck Converter

Application Note

Snubber Circuit for Buck Converter IC

Application Note

Capacitor Calculation for Buck converter IC

Application Note

Inductor Calculation for Buck converter IC

Application Note

Buck DC/DC Converter Recommended Inductor List

Application Note

Efficiency of Buck Converter

Application Note

The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit

Application Note

Considerations for Power Inductors Used for Buck Converters