FAN1616ASX Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The FAN1616ASX is a linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications with 500mA current capability in a SOT-223-4 surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The FAN1616ASX provides adjustable output voltage regulation from 1.25V to 16.8V with integrated over-current and over-temperature protection, suitable for low-power supply applications requiring compact form factors.

Key Parameters

Parameter	FAN1616ASX
Manufacturer	onsemi
Product Status	Obsolete
Output Configuration	Positive Adjustable
Number of Regulators	1
Voltage - Input (Max)	18V
Voltage - Output (Min)	1.25V
Voltage - Output (Max)	16.8V
Current - Output	500mA
Voltage Dropout (Max)	1.2V @ 500mA
PSRR	72dB (120Hz)
Protection Features	Over Current, Over Temperature
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-261-4, TO-261AA (SOT-223-4)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FAN1616ASX is determined by the following critical parameters:

Output configuration (positive adjustable)
Number of regulators (single output)
Package type (SOT-223-4 surface mount)
Adjustable output voltage range (minimum 1.25V, maximum ≥16.8V)
Current output capability (minimum 500mA)
Protection features (over-current and over-temperature)
Operating temperature range compatibility

The NCP1117STAT3G qualifies as a direct substitute based on these parameters. It maintains the same output configuration, package form factor, and protection features while providing enhanced specifications including higher maximum input voltage (20V vs 18V), higher maximum output voltage (18.8V vs 16.8V), and higher current output (1A vs 500mA). The adjustable output voltage minimum remains at 1.25V, ensuring compatibility with existing designs.

Parameter Comparison

Parameter	FAN1616ASX	NCP1117STAT3G	Compatibility
Manufacturer	onsemi	onsemi	Same
Output Configuration	Positive Adjustable	Positive Adjustable	Compatible
Number of Regulators	1	1	Compatible
Voltage - Input (Max)	18V	20V	Compatible (higher rating)
Voltage - Output (Min)	1.25V	1.25V	Compatible
Voltage - Output (Max)	16.8V	18.8V	Compatible (higher rating)
Current - Output	500mA	1A	Compatible (higher rating)
Voltage Dropout (Max)	1.2V @ 500mA	1.2V @ 800mA	Compatible
PSRR	72dB (120Hz)	73dB (120Hz)	Compatible (equivalent)
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Compatible
Operating Temperature	-40°C ~ 125°C	0°C ~ 125°C	Partial (NCP1117 narrower range)
Package / Case	TO-261-4, TO-261AA (SOT-223-4)	TO-261-4, TO-261AA (SOT-223)	Compatible
Mounting Type	Surface Mount	Surface Mount	Compatible
Product Status	Obsolete	Active	Substitute is active
RoHS Status	Not specified	ROHS3 Compliant	Substitute compliant

Engineering Selection Recommendations

The NCP1117STAT3G is the primary substitute for the obsolete FAN1616ASX. Selection is based on the following engineering criteria:

Both devices are manufactured by onsemi, ensuring consistent design philosophy and reliability standards
The NCP1117STAT3G maintains active product status, ensuring long-term availability and supply chain continuity
The substitute meets or exceeds all critical electrical parameters of the original part
The NCP1117STAT3G is ROHS3 compliant, meeting current environmental and regulatory requirements
Package compatibility is maintained with identical SOT-223 surface mount form factor
The operating temperature range of the NCP1117STAT3G (0°C ~ 125°C) is narrower than the original (-40°C ~ 125°C); applications requiring operation below 0°C must evaluate alternative solutions
Higher current output (1A vs 500mA) and higher maximum voltage ratings (20V input, 18.8V output) provide design margin for existing applications

Frequently Asked Questions (FAQ)

Q: Can the NCP1117STAT3G directly replace the FAN1616ASX in existing PCB designs?

A: Yes, the NCP1117STAT3G is pin-compatible and functionally equivalent for applications operating within 0°C to 125°C. The identical SOT-223-4 package allows direct PCB substitution without layout modifications. Applications requiring operation below 0°C require alternative component selection.

Q: What are the key differences between FAN1616ASX and NCP1117STAT3G?

A: The primary differences are product status (obsolete vs active), operating temperature range (FAN1616ASX supports -40°C minimum), current output capability (500mA vs 1A), and maximum voltage ratings (18V/16.8V vs 20V/18.8V input/output). The NCP1117STAT3G provides enhanced specifications suitable for new designs.

Q: Are there any compliance or certification differences?

A: The NCP1117STAT3G is ROHS3 compliant, meeting current environmental regulations. Both devices are REACH unaffected and carry EAR99 ECCN classification. The substitute meets modern compliance requirements for new production.

Q: What is the impact of the narrower operating temperature range of the NCP1117STAT3G?

A: The NCP1117STAT3G operates from 0°C to 125°C, compared to the FAN1616ASX range of -40°C to 125°C. Applications requiring operation below 0°C must evaluate alternative regulators or implement external thermal management strategies.

Q: Is the package form factor identical between these parts?

A: Yes, both devices use the SOT-223-4 surface mount package (TO-261-4, TO-261AA case). PCB footprints are identical, allowing direct substitution without layout redesign.

Q: What is the moisture sensitivity level for the substitute part?

A: The NCP1117STAT3G has MSL 1 (Unlimited), identical to the FAN1616ASX, indicating no moisture sensitivity restrictions for storage and handling.

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