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Product Detailed Parameters
- Description：4.5V TO 28V INPUT, 2.0A INTEGRAT
- 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：2A
- Frequency - Switching：350kHz
- 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-23-6CJ
- Grade：-
- Qualification：-
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Overview
The BD9E203FP4-ZTL is a single synchronous buck DC/DC converter IC manufactured by ROHM Semiconductor. It features an integrated low on-resistance power MOSFET and operates with a switching frequency of 350 kHz. The device accepts an input voltage range from 4.5 V to 28 V and provides a maximum output current of 2 A. It utilizes current mode control with internal phase compensation, housed in a compact TSOT23-6CJ package measuring 2.9 mm x 2.8 mm.
Feature Summary
- Integrates a low on-resistance power MOSFET within a single synchronous buck topology for high power density.
- Employs current mode control architecture with built-in internal phase compensation for stable operation.
- Utilizes a compact TSOT23-6CJ wireless structure package to minimize PCB footprint and reduce wiring impedance.
Applications
- Consumer electronics such as refrigerators and washing machines
- Industrial equipment including Programmable Logic Controllers (PLCs) and inverters
- General-purpose 3.3V, 5V, 12V, or 24V power supply circuits
Procurement Notes
Verify the specific suffix 'ZTL' against official ROHM documentation to confirm tape-and-reel packaging details and quantity per reel. Ensure the component meets standard-grade specifications and is not designated for automotive use unless explicitly stated in the latest datasheet revision. Confirm RoHS compliance status prior to integration.
Selection Notes
Select this component for applications requiring a compact form factor and efficient step-down conversion within a 4.5 V to 28 V input range. The 2 A output capability and 350 kHz switching frequency make it suitable for space-constrained designs in consumer and industrial sectors. Note that the device is classified as standard grade and is not recommended for automotive equipment.
Part Context
This part belongs to the BD9E series of integrated MOSFET DC-DC converters designed for energy-saving applications. The series targets markets demanding reduced standby power consumption and smaller board areas, utilizing constant on-time control methods to achieve high efficiency at light loads compared to conventional products.
Replacement Considerations
Consult official ROHM substitution guides for compatible alternatives within the BD9E family. Verify pin compatibility and electrical parameters before replacing with other synchronous buck converters.
