FAN2515S285X

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

The FAN2515S285X is a fixed-output low-dropout (LDO) voltage regulator from the FAN2514/15 family, manufactured by onsemi. It provides a regulated output of 2.85V with a maximum continuous current of 200mA and a peak capability of 300mA. The device utilizes CMOS technology to achieve ultra-low power consumption, featuring a ground pin current of 75µA at full load. It operates within an input voltage range of 2.7V to 6.5V and includes thermal limiting protection that shuts down the output if the junction temperature exceeds 150°C. Pin 4 serves as an open-drain error flag.

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

• Features an open-drain Error Flag (ERR) output on Pin 4 that indicates when the output voltage drops below 95% of the nominal value due to faults such as input dropout or overheating.
• Utilizes CMOS technology for ultra-low power consumption and optimized fast start enable times suitable for CDMA time phases.
• Incorporates onboard thermal limiting protection that disables the output during overload conditions until the device cools below the shutdown limit.
• Offers exceptional loop stability capable of accommodating a wide variety of external capacitors with varying ESR values.

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

• Cellular phones and accessories
• PDAs
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as the SOT-23-5 form factor is sensitive to physical damage. Ensure storage conditions comply with moisture sensitivity level requirements to prevent soldering defects during assembly.

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

Select this component for portable applications requiring a precise 2.85V rail with fault monitoring capabilities. The ERR pin allows system-level diagnostics for undervoltage events. Ensure the design accommodates the required input-to-output differential to maintain regulation within the specified dropout voltage limits across the operating temperature range.

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

This part belongs to the FAN2514/FAN2515 series of micropower LDO regulators designed for GSM, TDMA, and CDMA cellular handsets. While the FAN2514 variant offers adjustable or bypass options on Pin 4, the FAN2515 specifically integrates an error flag function. The series is noted for its pin compatibility with older BiCMOS designs and its optimization for compact battery-powered devices.

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

MIC5255-3.3YM5-TR

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

What is the function of Pin 4 on the FAN2515S285X?

Pin 4 is an open-drain Error Flag (ERR) output. It goes LOW when the output voltage drops below 95% of the nominal rated voltage, indicating a fault condition such as input dropout, overheating, or overloading.

How does the thermal protection mechanism operate?

If the die temperature exceeds 150°C due to power dissipation or overload, the onboard thermal protection circuitry automatically shuts down the output. The output remains suspended until the temperature drops below this limit, at which point it re-enables.