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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1A TSOT23-6L
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4.5V
- Voltage - Input (Max)：28V
- Voltage - Output (Min/Fixed)：0.7V
- Voltage - Output (Max)：22.4V
- Current - Output：1A
- Frequency - Switching：500kHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：SOT-23-6 Thin, TSOT-23-6
- Supplier Device Package：TSOT-23-6L
- Grade：-
- Qualification：-
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Overview
The BD9E105FP4-ZTL is a single-channel synchronous buck DC-DC converter from ROHM Semiconductor, designed for compact power management in consumer and industrial electronics. It features an integrated low on-resistance power MOSFET and operates with an input voltage range of 4.5V to 28V. The device delivers a maximum output current of 1A with an adjustable output voltage ranging from 0.7V to 22V. It supports a switching frequency up to 0.5MHz and functions within an operating temperature range of -40°C to 85°C. Packaged in a TSOT23-6L (2.9x2.8mm) footprint, it utilizes light load mode control to enhance efficiency at low currents.
Feature Summary
- Integrates a low on-resistance power MOSFET and controller in a single synchronous buck topology.
- Employs light load mode control to significantly improve efficiency during low-power standby conditions.
- Utilizes internal phase compensation for stable operation without external compensation components.
- Includes comprehensive protection mechanisms such as over-voltage, over-current, short-circuit, and thermal shutdown.
Applications
- Power supply circuits for home appliances including refrigerators and washing machines.
- Industrial equipment power stages such as PLCs and inverters.
- Compact portable devices requiring reduced PCB footprint and low standby power consumption.
Procurement Notes
Verify the specific suffix ZTL against official ROHM documentation to confirm tape-and-reel packaging specifications. Ensure compatibility with standard surface-mount assembly processes given the TSOT23-6L package dimensions. Confirm that the application does not involve automotive environments, as this product is explicitly designated for non-automotive use only.
Selection Notes
Select this component when designing systems requiring a small form factor under 3mm width with input voltages up to 28V. It is suitable for applications prioritizing standby power reduction through efficient light-load operation. Consider the 1A current limit and 0.5MHz maximum switching frequency when determining external inductor and capacitor values for desired ripple performance.
Part Context
This part belongs to the BD9E series of integrated MOSFET DC-DC converters developed by ROHM Semiconductor. The series targets the demand for smaller power units in consumer and industrial sectors by reducing footprint compared to traditional SOP-J8 packages. The BD9E105FP4-Z represents a 1A output variant within this lineup, focusing on high efficiency and compact design.
Replacement Considerations
Consult official ROHM substitution guides for direct equivalents. Verify pinout compatibility and electrical parameters if considering alternative manufacturers. No specific substitute part numbers are confirmed in public documentation.
