BD3552HFN-TR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BD3552HFN-TR is a single-channel Low Dropout (LDO) voltage regulator manufactured by ROHM Semiconductor, designed for applications requiring high current output within a compact footprint. It operates with an input voltage range of 4.3V to 5.5V and withstands up to 6V. The device delivers a maximum output current of 2A with an adjustable output voltage ranging from 0.65V to 2.7V. Key electrical specifications include a typical dropout voltage of 0.2V at full load, output accuracy of ±1.0% at 25°C, and a quiescent current of 0.5mA. It features a HSON8 package measuring 2.9×3×0.6mm and supports an operating temperature range from -10°C to 100°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Incorporates an Nch power MOSFET with ultra-low on-resistance to minimize voltage drop under heavy loads.
• Includes built-in protection mechanisms such as thermal shutdown, over-current protection, and under-voltage lock-out.
• Features a soft-start function with adjustable timing to reduce inrush current during startup.
• Supports tracking functionality for synchronized multi-rail power supply designs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Portable electronic devices requiring efficient step-down regulation from battery sources
• Embedded systems needing stable low-noise power rails for sensitive logic components
• Industrial control modules utilizing adjustable voltage references for variable signal processing

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix and packaging configuration when sourcing, as availability may vary by region. Confirm that the component status aligns with project requirements, noting that some variants may be designated for existing customers only. Ensure compatibility with RoHS standards if required by regulatory frameworks. Cross-reference the datasheet revision date to guarantee access to the most recent technical parameters and application notes.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this regulator when a high-output current capability near 2A is necessary alongside a small physical profile. The adjustable output voltage allows flexibility in setting precise rail voltages between 0.65V and 2.7V. Consider the low dropout characteristic for maximizing efficiency in battery-powered systems where input voltage approaches the desired output level. Evaluate the thermal performance within the HSON8 package to ensure adequate heat dissipation for the intended application environment.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to ROHM's series of high-current LDO regulators designed for space-constrained applications. The HSON8 package offers a significant reduction in board area compared to traditional linear regulators while maintaining robust thermal characteristics. It is engineered to provide reliable performance in consumer electronics and industrial equipment where power efficiency and size are critical design constraints.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

BD3551HFN-TR: Offers similar functionality but with a reduced maximum output current of 1A instead of 2A. Suitable for applications with lower power demands where the smaller current rating is sufficient.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the minimum output capacitor value required for stability?

The datasheet specifies a typical output capacitor requirement of 22µF for stable operation under normal conditions.

Does the device support external adjustment of the soft-start time?

Yes, the BD3552HFN-TR includes a soft-start function that can be adjusted externally to control the inrush current during startup.