BD9870FPS-E2 Power Management ICs - PMIC by Rohm

8-35V 1.5A 1ch Buck converter

Status: Recommended
Series: -
RoHS: Compliant
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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.

Prices starting from US$0.54


Distributor Starting From Stock
Logo for CoreStaff CoreStaff US$0.71
6,000
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Logo for Chip One Stop Chip One Stop US$0.54
2,000
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Logo for Future Electronics Future Electronics US$0.90
-
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Logo for Avnet America Avnet America US$0.97
-
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Logo for Farnell Farnell US$0.70
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Logo for Avnet Asia Avnet Asia -
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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

Specifications

ch 1
Integrated FET / Controller Integrated FET
Topology Buck
Synchronous / Nonsynchronous Non-synchronous
Vin1(Min.)[V] 8
Vin1(Max.)[V] 35
Vout1(Min.)[V] 1
Vout1(Max.)[V] 28
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
Package Size [mm] 6.5x9.5 (t=1.3)

Resources




Schematic Design & Verification
Calculation of Power Dissipation in Switching Circuit
Considering Input Filter to Reduce Conducted Emissions by DCDC Converter
Considering Polarity of Power Inductor to Reduce Radiated Emission of DC-DC converter
Method for Monitoring Switching Waveform
Phase Compensation Design for Current Mode Buck Converter
Method for Determining Constants of Peripheral Parts of Buck DC/DC Converter
Power Supply Sequence Circuit with General Purpose Power Supply IC
Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter
Diode Selection Method for Asynchronous Converter
PCB Layout Techniques of Buck Converter
Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)
Usage of SPICE Macromodel for DC/DC
Snubber Circuit for Buck Converter IC
Efficiency of Buck Converter
Calculation of Power Loss (Synchronous)
Inductor Calculation for Buck converter IC
Considerations for Power Inductors Used for Buck Converters
Capacitor Calculation for Buck converter IC
The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit
Resistor Value Table to set Output Voltage of Buck Converter IC
Importance of Probe Calibration When Measuring Power: Deskew
Impedance Characteristics of Bypass Capacitor



Manufacturing Data
Factory Information



Alternative Descriptions

Switching regulator,1chip FET integrated | RS
BD Series 8 to 35 V 900 kHz Buck SMT Switching Regulator - TO-252-5 | Future Electronics
Standard Regulator Pos 1V 1.5A 5-Pin(4+Tab) TO-252S T/R | Avnet America
DC-DC CONV, BUCK, ADJ, 900KHZ, TO-252-5 | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a BD9870FPS-E2?

Additional datasheets, footprints and schematics for BD9870FPS-E2 are listed on our Part Details page. You can also find images and similar parts to BD9870FPS-E2 on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for BD9870FPS-E2 on our Product Comparison page. Access via the 'View Pricing & Stock' button to view BD9870FPS-E2 price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does BD9870FPS-E2 fall under?

The BD9870FPS-E2 is listed under Semiconductors - ICs > Power Management ICs - PMIC > Voltage Regulators > DC / DC Adjustable Switching Regulators.

Can I view similar or alternative parts?

You can view similar parts to BD9870FPS-E2 when available in the DC / DC Adjustable Switching Regulators range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the BD9870FPS-E2 you can contact the distributor directly for product support, shipping queries etc.

Is the BD9870FPS-E2 RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ROHM Semiconductor.

Which authorised distributors for BD9870FPS-E2 have stock available?

Authorised distributors including CoreStaff, Chip One Stop, RS, Future Electronics and Avnet America have stock available or on a lead time for BD9870FPS-E2.

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