AP1186K5-33G-13 Equivalent & Substitute Parts

Part Overview

The AP1186K5-33G-13 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 3.3V output at 1.5A in a TO-263-5 surface mount package. This device is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	1.5A
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.38V @ 1.5A
Output Configuration	Positive Fixed
Package Type	TO-263-5 (D2PAK)
Mounting Type	Surface Mount
Operating Temperature Range	0°C ~ 150°C
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP1186K5-33G-13 is determined by the following critical parameters:

Fixed output voltage of 3.3V
Output current capability of 1.5A minimum
Surface mount package compatibility (TO-263-5 / D2PAK footprint)
Maximum input voltage rating of 16V or higher
Over current and over temperature protection
ROHS3 compliance

Two substitute parts meet these criteria: the AP1186K5-33L-13 (parametric equivalent from the same manufacturer) and the LT1963EQ-3.3#PBF (manufacturer-recommended alternative from Analog Devices Inc.).

Parameter Comparison

Parameter	AP1186K5-33G-13	AP1186K5-33L-13	LT1963EQ-3.3#PBF
Manufacturer	Diodes Incorporated	Diodes Incorporated	Analog Devices Inc.
Output Voltage	3.3V	3.3V	3.3V
Output Current	1.5A	1.5A	1.5A
Input Voltage (Max)	16V	16V	20V
Voltage Dropout (Max)	0.38V @ 1.5A	0.38V @ 1.5A	0.55V @ 1.5A
Quiescent Current (Iq)	10 mA	10 mA	1.5 mA
PSRR	70dB (120Hz)	70dB (120Hz)	63dB (120Hz)
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	0°C ~ 150°C	0°C ~ 150°C	-40°C ~ 125°C
Package / Case	TO-263-5	TO-263-5	DDPAK-5
Product Status	Obsolete	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AP1186K5-33L-13 is a parametric equivalent from Diodes Incorporated with identical electrical specifications and the same TO-263-5 package footprint. This part is the direct replacement for the AP1186K5-33G-13, differing only in packaging format (Tape & Reel versus bulk). Both parts are obsolete; however, the AP1186K5-33L-13 maintains higher inventory availability (2000 Pcs in stock).

LT1963EQ-3.3#PBF is an active product from Analog Devices Inc. and represents a long-term alternative. While it delivers the same 3.3V output at 1.5A, it offers several design advantages: higher maximum input voltage (20V versus 16V), lower quiescent current (1.5 mA versus 10 mA), and additional reverse polarity protection. The LT1963EQ-3.3#PBF uses a DDPAK-5 package, which is mechanically and electrically compatible with the TO-263-5 footprint. This part is actively manufactured and widely available (3584 Pcs in stock), making it suitable for long-term production support.

Frequently Asked Questions (FAQ)

Q: Can the AP1186K5-33L-13 be used as a direct replacement for the AP1186K5-33G-13?

A: Yes. Both parts are from the same manufacturer base product (AP1186) with identical electrical specifications, output voltage, current rating, dropout voltage, and protection features. The only difference is packaging format (Tape & Reel versus bulk). PCB footprint and pin configuration are identical.

Q: What are the key differences between the AP1186K5-33G-13 and the LT1963EQ-3.3#PBF?

A: The LT1963EQ-3.3#PBF offers higher input voltage tolerance (20V maximum versus 16V), significantly lower quiescent current (1.5 mA versus 10 mA), and includes reverse polarity protection. The LT1963EQ-3.3#PBF is an active product with ongoing manufacturer support, whereas both Diodes parts are obsolete. Both use compatible D2PAK packages.

Q: Are the TO-263-5 and DDPAK-5 packages interchangeable?

A: Yes. Both designations refer to the same D2PAK (5 Leads + Tab) surface mount package with identical pin configuration and footprint. The LT1963EQ-3.3#PBF can be used as a direct PCB replacement.

Q: Which substitute part should be selected for new designs?

A: The LT1963EQ-3.3#PBF is recommended for new designs due to its active product status, superior quiescent current performance, higher input voltage rating, and additional reverse polarity protection. For legacy production requiring exact part matching, the AP1186K5-33L-13 provides identical electrical performance.

Q: Are all three parts ROHS3 compliant?

A: Yes. The AP1186K5-33G-13, AP1186K5-33L-13, and LT1963EQ-3.3#PBF are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

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