BD9329EFJ-E2

Description：IC REG BUCK ADJ 3A 8HTSOP-J
Series：-
Mfr：Rohm Semiconductor
Package：Tape & Reel (TR)

SKU:f7d77714ce6e Category: Voltage Regulators - DC DC Switching Regulators Brand: Rohm Semiconductor

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK ADJ 3A 8HTSOP-J
Series：-
Mfr：Rohm Semiconductor
Package：Tape & Reel (TR)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：4.2V
Voltage - Input (Max)：18V
Voltage - Output (Min/Fixed)：0.9V
Voltage - Output (Max)：12.6V
Current - Output：3A
Frequency - Switching：380kHz
Synchronous Rectifier：Yes
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
Supplier Device Package：8-HTSOP-J
Grade：-
Qualification：-

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BD9329EFJ-E2

Overview

The BD9329EFJ-E2 is a single synchronous buck DC-DC converter manufactured by ROHM Semiconductor. It operates within an input voltage range of 4.2 V to 18 V and provides a continuous output current of 3 A. The adjustable output voltage spans from 900 mV to 12.6 V. The device integrates a power MOSFET and utilizes a fixed switching frequency of 380 kHz. It functions in an ambient temperature range of -40 °C to +85 °C and is housed in an HTSOP-J8 surface-mount package.

Feature Summary

Integrates a low on-resistance power MOSFET with the controller for compact design
Employs current-mode control architecture for rapid transient response
Requires minimal external components to establish the conversion circuit
Includes protection mechanisms such as under-voltage lockout, thermal shutdown, and over-current protection

Applications

Industrial equipment power distribution
Consumer electronics main supply rails
Embedded system logic and peripheral power generation

Procurement Notes

Verify component authenticity through authorized channels due to the NRND status. Confirm RoHS compliance documentation matches the specific revision. Validate that the HTSOP-J8 footprint aligns with existing PCB layouts. Ensure environmental specifications meet operational requirements. Review official datasheets for any recent product change notices affecting electrical characteristics or pin assignments.

Selection Notes

Evaluate the 4.2 V minimum input constraint against source availability. Assess thermal dissipation capabilities within the specified operating temperature range. Compare the 380 kHz switching frequency against electromagnetic interference requirements. Verify compatibility with available output capacitor ESR values. Consider the single-output configuration against system rail needs.

Part Context

This component belongs to the BD9329 series of integrated MOSFET DC-DC converters. These devices utilize constant on-time control methods to achieve fast transient responses while maintaining low standby power consumption. The series targets applications requiring efficient step-down regulation with minimal external component counts.