AP1117D33G-13 Equivalent & Substitute Parts

Part Overview

The AP1117D33G-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, delivering a fixed 3.3V output at 1A maximum current in a TO-252-3 (DPAK) surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The device provides positive fixed output regulation with integrated over-current and over-temperature protection, suitable for general-purpose power management applications requiring 3.3V rails.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Maximum Output Current	1A
Maximum Input Voltage	18V
Dropout Voltage (Max)	1.4V @ 1A
Quiescent Current	10 mA
PSRR	60dB (180Hz)
Protection Features	Over Current, Over Temperature
Operating Temperature Range	0°C ~ 125°C
Package	TO-252-3 (DPAK)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AP1117D33G-13 is determined by the following critical parameters:

Fixed output voltage of 3.3V
TO-252-3 (DPAK) package compatibility
Surface mount mounting type
Positive output configuration
Over-current and over-temperature protection features
ROHS3 compliance

Substitute parts must maintain these core electrical and mechanical specifications. Output current capability, maximum input voltage, dropout voltage, and quiescent current variations are acceptable within the constraints of the application circuit design. Operating temperature range extensions are permissible for enhanced performance margins.

Parameter Comparison

Part Number	Manufacturer	Output Current	Max Input Voltage	Dropout @ Rated Current	Iq (mA)	PSRR (dB)	Temp Range	Status
AP1117D33G-13	Diodes Inc.	1A	18V	1.4V @ 1A	10	60 (180Hz)	0°C ~ 125°C	Obsolete
AZ1117CD-3.3TRG1	Diodes Inc.	1A	15V	1.4V @ 800mA	6	70 (120Hz)	-20°C ~ 125°C	Active
LD1117ADT33TR	STMicroelectronics	1A	15V	1.3V @ 1A	10	75 (120Hz)	0°C ~ 125°C	Active
LD1117DT33CTR	STMicroelectronics	800mA	15V	1.3V @ 800mA	10	75 (120Hz)	-40°C ~ 125°C	Active
LD1117DT33TR	STMicroelectronics	800mA	15V	1.2V @ 800mA	10	75 (120Hz)	0°C ~ 125°C	Active
LM1117DT-3.3/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5	75 (120Hz)	0°C ~ 125°C	Active
LM1117DTX-3.3/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5	75 (120Hz)	0°C ~ 125°C	Active
LM1117IDT-3.3/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5	75 (120Hz)	-40°C ~ 125°C	Active
LM1117IDTX-3.3/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5	75 (120Hz)	-40°C ~ 125°C	Active
NCP1117DT33RKG	onsemi	1A	20V	1.2V @ 800mA	10	64 (120Hz)	0°C ~ 125°C	Active
NCP1117DT33T5G	onsemi	1A	20V	1.2V @ 800mA	10	64 (120Hz)	0°C ~ 125°C	Active

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for new designs. The AP1117D33G-13 obsolete status necessitates migration to active alternatives.

For applications requiring full 1A output current capability with minimal design changes, AZ1117CD-3.3TRG1, LD1117ADT33TR, NCP1117DT33RKG, and NCP1117DT33T5G maintain the 1A specification. The onsemi NCP1117 variants offer extended maximum input voltage (20V) compared to the original 18V specification.

For applications with maximum output current requirements of 800mA or less, the Texas Instruments LM1117 series (LM1117DT-3.3/NOPB, LM1117DTX-3.3/NOPB, LM1117IDT-3.3/NOPB, LM1117IDTX-3.3/NOPB) and STMicroelectronics LD1117 variants (LD1117DT33CTR, LD1117DT33TR) provide active alternatives with improved PSRR performance (75dB) and lower quiescent current (5mA for LM1117 series).

Extended operating temperature ranges (-40°C lower bound) are available in LD1117DT33CTR, LM1117IDT-3.3/NOPB, and LM1117IDTX-3.3/NOPB for applications requiring enhanced thermal performance margins.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AP1117D33G-13 with any of these substitute parts?

A: Direct replacement is possible for all listed parts within the TO-252-3 package. However, verify your application's maximum output current requirement. If your circuit draws more than 800mA continuously, use AZ1117CD-3.3TRG1, LD1117ADT33TR, NCP1117DT33RKG, or NCP1117DT33T5G. For 800mA or less, all alternatives are suitable.

Q: What is the difference between LM1117DT-3.3/NOPB and LM1117DTX-3.3/NOPB?

A: Both parts are electrically identical with identical specifications. The primary difference is packaging: LM1117DT-3.3/NOPB is supplied in Tube packaging, while LM1117DTX-3.3/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Select based on your procurement and assembly requirements.

Q: Are there differences between LD1117ADT33TR and LD1117DT33TR?

A: LD1117ADT33TR supports 1A output current, while LD1117DT33TR is rated for 800mA maximum. Both share identical dropout voltage (1.3V and 1.2V respectively at their rated currents) and protection features. Select based on your circuit's current demand.

Q: Which substitute offers the best PSRR performance?

A: STMicroelectronics LD1117 variants (LD1117ADT33TR, LD1117DT33CTR, LD1117DT33TR) and Texas Instruments LM1117 series all provide 75dB PSRR at 120Hz, superior to the original AP1117D33G-13 specification of 60dB at 180Hz.

Q: Can I use NCP1117DT33RKG or NCP1117DT33T5G if my input voltage exceeds 18V?

A: Yes. Both onsemi NCP1117 variants support maximum input voltage of 20V, compared to the original 18V specification. This provides additional design margin for applications with variable input supplies.

Q: What is the difference between NCP1117DT33RKG and NCP1117DT33T5G?

A: Both parts are electrically identical. The primary difference is packaging: NCP1117DT33RKG is supplied in Cut Tape (CT) & Digi-Reel® format, while NCP1117DT33T5G is also supplied in Cut Tape (CT) & Digi-Reel® format. Verify specific packaging requirements with your supplier.

Q: Do all substitutes maintain the same thermal protection characteristics?

A: All listed substitutes include over-current and over-temperature protection. However, AZ1117CD-3.3TRG1 specifies thermal shutdown as its protection feature, while others specify both over-current and over-temperature protection. Verify thermal management requirements for your specific application.

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