AP2402A33KTR-E1 Equivalent & Substitute Parts

Part Overview

The AP2402A33KTR-E1 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to provide dual positive fixed 2.8V outputs at 300mA each in a SOT-23-6 surface mount package. This device features integrated enable/shutdown control and protection against overcurrent and overtemperature conditions. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP2402A33KTR-E1
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Package / Case	SOT-23-6
Output Configuration	Positive
Number of Regulators	2
Voltage - Output (Fixed)	2.8V, 2.8V
Current - Output	300mA, 300mA
Voltage - Input (Max)	6V
Voltage Dropout (Max)	0.08V @ 100mA
Current - Quiescent (Iq)	90 µA
PSRR	70dB (1kHz)
Control Features	Enable, Shutdown
Protection Features	Over Current, Over Temperature
Operating Temperature	-20°C ~ 60°C
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AP2402A33KTR-E1 is determined by the following critical parameters:

Dual output configuration with fixed 2.8V outputs
300mA per output current capability
SOT-23-6 package compatibility
Positive output configuration
Maximum input voltage rating of 5.5V or higher
Dropout voltage performance suitable for the application
Integrated protection features (overcurrent, overtemperature)
Surface mount technology

The RT9011-MMGJ6 from Richtek USA Inc. qualifies as a manufacturer-recommended substitute based on matching output voltage, current ratings, package form factor, and protection feature set. Both devices provide dual positive fixed regulators in SOT-23-6 packaging with equivalent functional capability.

Parameter Comparison

Parameter	AP2402A33KTR-E1	RT9011-MMGJ6
Manufacturer	Diodes Incorporated	Richtek USA Inc.
Package / Case	SOT-23-6	SOT-23-6 Thin (TSOT-23-6)
Output Configuration	Positive	Positive
Number of Regulators	2	2
Voltage - Output (Fixed)	2.8V, 2.8V	2.8V, 2.8V
Current - Output	300mA, 300mA	300mA, 300mA
Voltage - Input (Max)	6V	5.5V
Voltage Dropout (Max)	0.08V @ 100mA	0.33V @ 300mA
Current - Quiescent (Iq)	90 µA	80 µA
PSRR	70dB (1kHz)	70dB ~ 38dB (100Hz ~ 300kHz)
Control Features	Enable, Shutdown	Enable
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit
Operating Temperature	-20°C ~ 60°C	-40°C ~ 85°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

The RT9011-MMGJ6 is the manufacturer-recommended substitute for the obsolete AP2402A33KTR-E1. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Key considerations for selection:

The RT9011-MMGJ6 provides active product status with extended operating temperature range (-40°C ~ 85°C versus -20°C ~ 60°C), offering broader environmental capability. The substitute includes short circuit protection in addition to overcurrent and overtemperature protection. The maximum input voltage is reduced from 6V to 5.5V, requiring verification against system input specifications. Dropout voltage performance differs, with the substitute showing 0.33V @ 300mA compared to 0.08V @ 100mA on the original part. The RT9011-MMGJ6 uses TSOT-23-6 (thin variant) packaging, which maintains SOT-23-6 footprint compatibility while offering reduced height. MSL rating increases from 1 to 3, affecting moisture handling during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the RT9011-MMGJ6 directly replace the AP2402A33KTR-E1 on existing PCBs?

A: Yes. Both devices use SOT-23-6 package footprints with compatible pinouts for dual positive output regulators. The TSOT-23-6 variant is a thin version of the standard SOT-23-6, maintaining electrical and mechanical compatibility while reducing package height.

Q: What is the impact of the reduced maximum input voltage (5.5V vs 6V)?

A: System input voltage must not exceed 5.5V when using the RT9011-MMGJ6. If the original design operates at input voltages between 5.5V and 6V, the substitute is not suitable without circuit modification.

Q: How does the increased dropout voltage affect circuit performance?

A: The RT9011-MMGJ6 exhibits 0.33V dropout at full 300mA output current, compared to 0.08V on the original part. This requires higher input voltage headroom to maintain regulated output. Verify that system input voltage provides sufficient margin above the 2.8V output plus dropout voltage.

Q: Are there differences in control functionality?

A: The original part includes both Enable and Shutdown control features. The RT9011-MMGJ6 provides Enable control only. If shutdown functionality is required, alternative substitutes must be evaluated.

Q: What is the significance of the MSL rating change from 1 to 3?

A: MSL 1 allows unlimited shelf life without moisture baking. MSL 3 requires moisture baking after 168 hours of exposure to ambient conditions. The RT9011-MMGJ6 requires standard moisture control procedures during storage and assembly.

Q: Does the extended operating temperature range of the RT9011-MMGJ6 provide additional design flexibility?

A: Yes. The substitute supports -40°C ~ 85°C operation versus -20°C ~ 60°C for the original part, enabling use in wider temperature environments and providing margin for thermal stress conditions.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the AP2402A33KTR-E1 and RT9011-MMGJ6 are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.

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