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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 8HTSOP-J
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4.75V
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：0.9V
- Voltage - Output (Max)：16.2V
- Current - Output：4A
- 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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Overview
The BD9327EFJ-LBE2 is a single-channel synchronous buck DC/DC converter manufactured by ROHM Semiconductor. It integrates a low on-resistance power MOSFET and controller within a compact HTSOP-J8 package. The device supports an input voltage range of 4.75 V to 18 V and delivers a maximum output current of 4 A. Key electrical specifications include a fixed switching frequency of 380 kHz, a typical quiescent current of 80 µA, and an operating supply current of 2.1 mA. It operates within a temperature range of -40°C to +85°C and features a shutdown pin for power management.
Feature Summary
- Integrates a low on-resistance power MOSFET and control circuitry into a single chip to minimize external component count.
- Employs current-mode control architecture to ensure rapid transient response and simplified phase compensation.
- Supports wide input voltage ranges suitable for various bus voltage applications.
- Includes a dedicated shutdown function to reduce power consumption during standby modes.
Applications
- Portable electronic devices requiring efficient step-down conversion
- Industrial equipment with moderate current demands
- Communication infrastructure power supplies
- General-purpose embedded systems
Procurement Notes
Verify the complete part number including the suffix LBE2 to confirm packaging configuration. Ensure compatibility with the HTSOP-J8 footprint during PCB layout. Confirm RoHS compliance status through official manufacturer documentation before integration. Cross-reference thermal requirements against system constraints.
Selection Notes
Select this component when a single-output solution with integrated power FETs is required. Consider the 4 A output capability and 380 kHz switching frequency for size-constrained designs. Evaluate the 80 µA quiescent current against standby power budgets. Verify that the 4.75 V minimum input voltage aligns with the source supply characteristics.
Part Context
This device belongs to the BD9327EFJ series of synchronous buck converters from ROHM Semiconductor. The series is characterized by high efficiency and compact form factors due to integrated power stages. It serves as a power management IC within the broader PMIC category, designed for applications needing reliable voltage regulation in small packages.
Replacement Considerations
Consult official ROHM documentation for verified cross-references or updated revisions. No direct substitute part numbers are confirmed in the provided data. Ensure any replacement matches the HTSOP-J8 package and electrical specifications.
