FAN1117AS25X

Description：IC REG LINEAR 2.5V 1A SOT-223-4
Series：-
Mfr：onsemi
Package：Tape & Reel (TR)

SKU:945178831445 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: onsemi

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Product introduction

FAN1117AS25X is listed in the Voltage Regulators - Linear, Low Drop Out (LDO) Regulators range at ChipApex. The manufacturer field lists onsemi. Its product description is IC REG LINEAR 2.5V 1A SOT-223-4. Review the specifications below when checking this part for your BOM.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators specifications for FAN1117AS25X

Description：IC REG LINEAR 2.5V 1A SOT-223-4
Series：-
Mfr：onsemi
Package：Tape & Reel (TR)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：18V
Voltage - Output (Min/Fixed)：2.5V
Voltage - Output (Max)：-
Voltage Dropout (Max)：1.2V @ 1A
Current - Output：1A
Current - Quiescent (Iq)：-
Current - Supply (Max)：-
PSRR：72dB (120Hz)
Control Features：-
Protection Features：Over Current, Over Temperature
Operating Temperature：0°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：TO-261-4, TO-261AA
Supplier Device Package：SOT-223-4
Grade：-
Qualification：-

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators datasheet and documents for FAN1117AS25X

FAN1117AS25X

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

The FAN1117AS25X is a linear low-dropout (LDO) voltage regulator manufactured by onsemi. It provides a fixed positive output voltage of 2.5 V with a maximum output current of 1 A. The device features a maximum dropout voltage of 1.2 V at full load and offers a power supply rejection ratio (PSRR) of 72 dB at 120 Hz. Protection mechanisms include over-current and over-temperature shutdown. It operates within an ambient temperature range of 0°C to +125°C and is housed in a surface-mount SOT-223 package.

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

Fixed 2.5V output voltage regulation
Integrated over-current and thermal protection
Surface-mount SOT-223 packaging

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

Portable battery-powered equipment
Cellular phones and pagers
Laptop computers

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

This component is officially listed as obsolete and no longer manufactured by onsemi. Verification should focus on identifying valid direct substitutes, such as the NCP1117ST25T3G, rather than sourcing new original units. Ensure any replacement part matches the required electrical specifications and package type for your design.

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

Select this part only if legacy compatibility is required or if a direct pin-compatible substitute like the NCP1117 series is acceptable. Verify that the fixed 2.5V output meets system requirements, as adjustment is not possible. Confirm that the SOT-223 package fits the PCB layout constraints and thermal management strategy.

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

The FAN1117AS25X belongs to the LDO regulator family designed for low-noise, high-rejection applications. It is part of a broader line of linear regulators from onsemi, often used in consumer electronics where stable voltage rails are critical. The AS25 suffix denotes the specific 2.5V fixed output variant within this product family.

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

The NCP1117ST25T3G is a confirmed direct substitute offering identical electrical characteristics and pinout. Both parts provide 2.5V output at 1A in a SOT-223 package. Verify that the substitute is available from authorized distributors.

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Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.