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BD9D321EFJ-E2 The ROHM Semiconductor BD9D321EFJ-E2 is an adjustable 3A buck switching regulator. It operates with a 700kHz frequency and is housed in an 8-HTSOP-J package.
Mfr Part #:

BD9D321EFJ-E2

Available from 2 distributors
Mfr Name: ROHM Semiconductor
ROHM Semiconductor
The ROHM Semiconductor BD9D321EFJ-E2 is an adjustable 3A buck switching regulator. It operates with a 700kHz frequency and is housed in an 8-HTSOP-J package.
✓ Total Stock: 6,284 pcs
$ Price Range: $0.16

BD9D321EFJ-E2 Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Risen Electronics ✓
Non-Authorised Inventory information
4,000 pcs
On Request
4000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
Xingangxin ✓
Non-Authorised Inventory information
2,284 pcs
On Request
2284 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

BD9D321EFJ-E2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Frequency
Function
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Type
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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BD9D321EFJ-E2 Description

Short technical summary and product information.

The BD9D321EFJ-E2 from ROHM Semiconductor is a high-performance buck (step-down) switching regulator designed for efficient power conversion. This integrated circuit features an adjustable output voltage and can deliver up to 3A of current.

 

With a switching frequency of 700kHz, the BD9D321EFJ-E2 enables the use of smaller external components, contributing to a more compact design. It operates within a temperature range of -40°C to 85°C (TA), making it suitable for various environmental conditions. The device is packaged in an 8-HTSOP-J, which is a surface-mount type, and also conforms to the 8-SOIC (0.154", 3.90mm Width) Exposed Pad standard.

 

This synchronous buck converter is designed for applications requiring reliable and efficient voltage regulation. Its adjustable output capability provides flexibility for different design needs.

BD9D321EFJ-E2 Quick Information

Product Type: Switching Regulator
Canonical Name: BD9D321EFJ-E2 Buck Switching Regulator
Subcategory: Buck (Step-down)

BD9D321EFJ-E2 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BD9D321EFJ-E2 Estimated Pricing

Qty Low High
1+ $0.16 $0.16

Estimated market price range - modelled values for guidance only, not live distributor offers.

BD9D321EFJ-E2 Features

  • Synchronous buck step-down topology.
  • Output current up to 3A.
  • Adjustable output voltage configuration.
  • Switching frequency of 700kHz.
  • Surface mount 8-HTSOP-J package.

BD9D321EFJ-E2 Applications

  • Efficient power supply designs.
  • Compact electronic devices.
  • Systems requiring adjustable voltage.
  • Automotive power management.

BD9D321EFJ-E2 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the input voltage specification?

The input voltage is 4.5V.

What is the output current rating?

3A.

What is the switching frequency?

700kHz.

What is the operating temperature range?

-40°C to 85°C (TA).

What is the package type?

8-HTSOP-J (8-SOIC with exposed pad).

Is this a synchronous rectifier?

Yes.

What is the topology?

Buck (step-down).

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