BD9109FVM-TR

$1.85

Description：IC REG BUCK 3.3V 800MA 8MSOP
Series：-
Mfr：Rohm Semiconductor
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:d83d5d180030 Category: Voltage Regulators - DC DC Switching Regulators Brand: Rohm Semiconductor

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK 3.3V 800MA 8MSOP
Series：-
Mfr：Rohm Semiconductor
Package：Tape & Reel (TR),Cut Tape (CT)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Fixed
Number of Outputs：1
Voltage - Input (Min)：4.5V
Voltage - Input (Max)：5.5V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：-
Current - Output：800mA
Frequency - Switching：1MHz
Synchronous Rectifier：Yes
Operating Temperature：-25°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：8-VSSOP, 8-MSOP (0.110", 2.80mm Width)
Supplier Device Package：8-MSOP
Grade：-
Qualification：-

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BD9109FVM-TR

Overview

The BD9109FVM-TR is a synchronous buck switching regulator manufactured by ROHM Semiconductor. It operates with an input voltage range of 4.5 V to 5.5 V and provides a fixed output voltage of 3.3 V. The device supports a maximum output current of 800 mA and features a switching frequency of up to 1 MHz. It utilizes current-mode control for fast transient response. The component is housed in an MSOP-8 package and functions within an operating temperature range of -25 °C to +85 °C.

Feature Summary

Integrates synchronous rectification using Nch/Pch FETs for high efficiency across load ranges
Employs current-mode PWM control to ensure rapid transient response during load changes
Includes built-in protection mechanisms such as thermal shutdown, UVLO, and timed short-circuit protection

Applications

Industrial equipment power supplies
Portable electronic devices requiring stable 3.3V rails
Embedded systems with 5V input sources

Procurement Notes

Verify the specific suffix LBTR if low whisker compliance is required, as standard TR variants may differ. Confirm RoHS status and lead times directly with authorized distributors. Ensure the MSOP-8 footprint matches the PCB design. Check for end-of-life notices or recommended new designations from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a fixed 3.3V output is needed from a 5V source with moderate current demands. The synchronous topology offers better efficiency than nonsynchronous alternatives at similar current levels. Consider the MSOP-8 package size constraints and thermal dissipation requirements for the specific application environment.

Part Context

This part belongs to the BD9109 series of step-down switching regulators designed for industrial applications. It is part of ROHM's portfolio of PMICs that integrate power MOSFETs to reduce external component count. The series emphasizes high efficiency through proprietary light load modes and robust protection features for reliable operation in demanding environments.