AP1186T5-L-U Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The AP1186T5-L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications requiring 1.5A current capacity in a TO-220-5 package. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The device provides adjustable output voltage regulation with integrated over-current and over-temperature protection suitable for through-hole mounting applications.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	16V
Voltage - Output (Min/Fixed)	1.25V
Voltage - Output (Max)	15.5V
Current - Output	1.5A
Voltage Dropout (Max)	0.38V @ 1.5A
Package / Case	TO-220-5
Mounting Type	Through Hole
Operating Temperature	0°C ~ 150°C (TJ)
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AP1186T5-L-U is determined by the following critical parameters:

Output Configuration & Type: Must be positive adjustable output
Number of Regulators: Single regulator only
Current Capacity: 1.5A output current minimum
Package: TO-220-5 through-hole mounting
Voltage Range: Input maximum ≥16V; adjustable output range covering 1.25V minimum to 15.5V maximum
Protection: Over-current and over-temperature protection required
Compliance: ROHS3 compliance maintained

The LT1963ET#06PBF from Analog Devices Inc. meets these core substitution criteria while offering enhanced specifications in certain areas.

Parameter Comparison

Parameter	AP1186T5-L-U (Diodes Inc.)	LT1963ET#06PBF (Analog Devices)
Manufacturer	Diodes Incorporated	Analog Devices Inc.
Product Status	Obsolete	Active
Output Configuration	Positive	Positive
Output Type	Adjustable	Adjustable
Number of Regulators	1	1
Voltage - Input (Max)	16V	20V
Voltage - Output (Min/Fixed)	1.25V	1.21V
Voltage - Output (Max)	15.5V	20V
Current - Output	1.5A	1.5A
Voltage Dropout (Max)	0.38V @ 1.5A	0.55V @ 1.5A
Current - Quiescent (Iq)	10 mA	1.5 mA
PSRR	70dB (120Hz)	63dB (120Hz)
Package / Case	TO-220-5	TO-220-5
Mounting Type	Through Hole	Through Hole
Operating Temperature	0°C ~ 150°C (TJ)	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Control Features	None	Enable

Engineering Selection Recommendations

The LT1963ET#06PBF qualifies as a direct functional substitute for the obsolete AP1186T5-L-U based on matching output configuration, adjustable output type, 1.5A current capacity, and TO-220-5 package compatibility. Both devices maintain ROHS3 compliance and provide required protection features.

The LT1963ET#06PBF offers active product status, ensuring continued availability and manufacturing support. The substitute provides extended input voltage rating (20V vs. 16V), wider adjustable output range (1.21V to 20V vs. 1.25V to 15.5V), and additional reverse polarity protection. The LT1963ET#06PBF includes an enable control feature not present in the original part.

Trade-offs include higher dropout voltage (0.55V vs. 0.38V at 1.5A) and lower quiescent current (1.5 mA vs. 10 mA). Operating temperature range differs, with the substitute supporting -40°C to 125°C versus the original 0°C to 150°C specification.

Frequently Asked Questions (FAQ)

Q: Can the LT1963ET#06PBF directly replace the AP1186T5-L-U in existing designs?

A: Yes, for applications within the overlapping electrical specifications. Both devices share identical output current capacity (1.5A), TO-220-5 package, positive adjustable output configuration, and core protection features. Verify that your application input voltage does not exceed 16V and that output voltage requirements fall within 1.25V to 15.5V range to maintain specification alignment with the original part.

Q: What are the key differences between these two regulators?

A: The primary differences are product status (active vs. obsolete), input voltage maximum (20V vs. 16V), dropout voltage (0.55V vs. 0.38V at 1.5A), quiescent current (1.5 mA vs. 10 mA), and operating temperature range (-40°C to 125°C vs. 0°C to 150°C). The LT1963ET#06PBF adds reverse polarity protection and an enable control feature.

Q: Are both parts available in the same package?

A: Yes. Both the AP1186T5-L-U and LT1963ET#06PBF use TO-220-5 through-hole packaging, ensuring mechanical and pin compatibility for PCB mounting.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both devices are ROHS3 compliant, meeting environmental and regulatory requirements for lead-free manufacturing and restricted substance limitations.

Q: Which part should I select for new designs?

A: The LT1963ET#06PBF is recommended for new designs due to active product status, ensuring long-term availability and manufacturing continuity. The part provides equivalent functionality with enhanced specifications in input voltage range and protection features.

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