FAN1537PBX

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

The FAN1537PBX is a dual low dropout linear regulator manufactured by Fairchild Semiconductor. It provides two independent output channels, each capable of delivering up to 1 A of current. The device features a fixed 3.3 V output and an adjustable or fixed secondary output (2.5 V or 1.8 V). It operates with a maximum input voltage of 10 V and includes built-in thermal limiting protection.

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

• Dual channel architecture providing independent regulation for two distinct voltage rails
• Optimized for low voltage applications with minimal input-to-output differential
• Integrated thermal limiting circuitry to prevent damage during overload conditions
• Designed for stability with low equivalent series resistance output capacitors

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

• Hard disk drives and optical storage media
• ADSL and cable modem power systems
• Post-regulation for switching power supplies
• Motherboard multi-supply architectures

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

Verify the specific suffix against the manufacturer's official documentation to confirm the exact secondary output configuration, as variants exist for different fixed voltages. Ensure the package type matches the required PCB footprint. Confirm RoHS compliance status if environmental regulations apply to the final assembly.

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

Select this component when dual isolated rails are required from a single source. It is suitable for systems needing a primary 3.3 V rail alongside a lower voltage reference. Consider the thermal dissipation requirements based on the input-output voltage difference and load current to ensure reliable operation within the specified temperature range.

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

This part belongs to the FAN1537 family of dual LDO regulators. It shares functional similarities with the FAN1539 series but offers dual outputs instead of a single channel. The PBX designation typically indicates a specific tape-and-reel packaging format intended for automated surface-mount assembly processes.

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

Direct substitutes include other parts in the FAN1537 series such as the FAN1537B or FAN1537D, provided the pinout and package dimensions are compatible. Verify that alternative components meet the same 1 A current rating and dropout voltage specifications.