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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)：4V
- 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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Overview
The BD9109FVM-LBTR is a synchronous buck switching regulator manufactured by Rohm Semiconductor. It operates with an input voltage range of 4.5V to 5.5V and provides a fixed output voltage of 3.3V. The device supports a maximum output current of 0.8A and features a switching frequency up to 1MHz. It utilizes current-mode PWM control for fast transient response and includes SLLM technology for high efficiency at light loads. The component is housed in an 8-MSOP package and functions within a temperature range of -25°C to +85°C.
Feature Summary
- Integrates Nch/Pch FETs for synchronous rectification to maximize efficiency across load ranges.
- Employs current-mode PWM control to ensure rapid transient response during load changes.
- Includes Simple Light Load Mode (SLLM) to maintain high efficiency under low power conditions.
- Features built-in protection mechanisms including thermal shutdown, UVLO, and short-circuit protection.
Applications
- Industrial equipment requiring stable 3.3V power rails from 5V sources
- Consumer electronics utilizing 5V input power architectures
- Embedded systems needing compact DC-DC conversion solutions
Procurement Notes
Verify the specific suffix LBTR confirms the tape and reel packaging format required for automated assembly processes. Confirm that the RoHS compliance status meets environmental regulations for your target market. Ensure the MSOP-8 footprint matches your PCB design guidelines. Check for any lead time variations as this is a standard industrial grade component.
Selection Notes
Select this part when a fixed 3.3V output is required from a 5V supply without external feedback resistors. It is suitable for applications prioritizing small board space due to the integrated MOSFETs. Choose this over adjustable regulators if system complexity needs reduction. Consider the 0.8A limit against peak load requirements to prevent thermal throttling.
Part Context
This component belongs to the BD91xx series of switching voltage regulators designed for industrial applications. These devices are characterized by their long life cycle support and robust performance in demanding environments. The series emphasizes high efficiency through proprietary control techniques and integrated power stages.
Replacement Considerations
BD9106FVM-LBTR is a related variant within the same family but offers adjustable output voltage rather than fixed 3.3V. Verify pin compatibility and electrical specifications before substitution. Other BD91xx models may share the package but differ in current capacity or control features.
