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Product Detailed Parameters
- Description：IC REG BUCK -5V SMP5C2
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Negative
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4V
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：-5V
- Voltage - Output (Max)：-
- Current - Output：-
- Frequency - Switching：900kHz
- Synchronous Rectifier：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Supplier Device Package：SMP5C2
- Grade：-
- Qualification：-
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Overview
The BD9718G-TR is a negative fixed-output switching voltage regulator IC manufactured by ROHM Semiconductor. It provides a stable -5V output with a maximum current capacity of 300 mA. The device operates within an input voltage range of 4 V to 14 V and features a switching frequency of 900 kHz. Designed for surface-mount applications, it utilizes a compact SOT-23-5 (TSOT-23-5) package. The component supports an operating temperature range up to +85°C and includes internal circuitry for efficient inverting DC-DC conversion.
Feature Summary
- Provides a fixed negative output voltage suitable for inverting power supply applications
- Integrates synchronous rectification for improved efficiency in a small footprint
- Operates at a high switching frequency to minimize external passive component size
Applications
- Portable electronic devices requiring negative rail generation
- Battery-powered systems needing inverted voltage supplies
- Embedded circuits utilizing single positive supply rails
Procurement Notes
Verify the specific suffix 'G-TR' to confirm the tape-and-reel packaging format and RoHS compliance status. Ensure the ordering code matches the required SOT-23-5 thin package variant. Cross-reference the manufacturer datasheet for any recent lifecycle changes or recommended alternative components before finalizing procurement orders.
Selection Notes
Select this component when a fixed -5V output is required from a 4V to 14V input source. Consider the 300 mA output current limit and 900 kHz switching frequency for thermal management and filter design. The TSOT-23-5 package is ideal for space-constrained PCB layouts compared to larger regulator packages.
Part Context
This part belongs to ROHM's series of switching voltage regulators designed for portable electronics. It functions as an inverting buck-boost converter, generating a negative voltage from a positive input. The BD9718G-TR is distinct from standard step-down regulators due to its ability to produce negative outputs, making it suitable for analog circuits requiring dual polarity supplies.
Replacement Considerations
Consult official substitution lists for equivalent negative regulator ICs with similar -5V output and current ratings. Verify pin compatibility and thermal performance if replacing with parts from other manufacturers.
