MIC5259-2.85BD5-TR Equivalent & Substitute Parts

Part Overview

The MIC5259-2.85BD5-TR is a linear voltage regulator IC from Microchip Technology, delivering a fixed 2.85V output at 300mA in a TSOT-23-5 surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The regulator includes integrated protection features for over-current, over-temperature, and under-voltage lockout conditions, with an enable control feature for power management flexibility.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.85V
Output Current	300mA
Input Voltage (Max)	6V
Voltage Dropout (Max)	0.55V @ 300mA
Quiescent Current	150 µA
Package Type	TSOT-23-5
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, UVLO

Substitute Part Grouping Explanation

Substitution eligibility for the MIC5259-2.85BD5-TR is determined by the following critical parameters:

Fixed output voltage of 2.85V
Output current capability of 300mA minimum
TSOT-23-5 package compatibility
Positive fixed output configuration
Enable control feature
Over-current, over-temperature, and UVLO protection
Operating temperature range of -40°C to 125°C

Two substitute parts meet these criteria: the MIC5259-2.85YD5-TR (same manufacturer, active product status) and the ADP122AUJZ-2.85-R7 (Analog Devices, active product status). Both maintain electrical and mechanical compatibility with the original specification.

Parameter Comparison

Parameter	MIC5259-2.85BD5-TR (Main)	MIC5259-2.85YD5-TR (Substitute)	ADP122AUJZ-2.85-R7 (Substitute)
Manufacturer	Microchip Technology	Microchip Technology	Analog Devices Inc.
Output Voltage	2.85V	2.85V	2.85V
Output Current	300mA	300mA	300mA
Input Voltage (Max)	6V	6V	5.5V
Voltage Dropout (Max)	0.55V @ 300mA	0.55V @ 300mA	0.15V @ 300mA
Quiescent Current	150 µA	150 µA	105 µA
Supply Current (Max)	250 µA	250 µA	240 µA
PSRR	65dB ~ 53dB (10Hz ~ 10kHz)	65dB ~ 53dB (10Hz ~ 10kHz)	60dB (10kHz ~ 100kHz)
Package	TSOT-23-5	TSOT-23-5	TSOT-23-5
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Product Status	Discontinued	Active	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MIC5259-2.85YD5-TR is the primary substitute, offering identical electrical specifications and the same manufacturer lineage. This part is currently active and in stock with 3,667 units available. It achieves ROHS3 compliance, addressing regulatory requirements that the discontinued original part does not meet. Pin-for-pin compatibility and matching performance characteristics make this the direct replacement for existing designs.

ADP122AUJZ-2.85-R7 serves as an alternative substitute from Analog Devices Inc. This part demonstrates superior performance in specific areas: lower voltage dropout (0.15V vs. 0.55V @ 300mA) and reduced quiescent current (105 µA vs. 150 µA). However, the maximum input voltage is limited to 5.5V compared to 6V for the Microchip options. This part is active with 9,942 units in stock and maintains ROHS3 compliance. Selection of this part requires verification that the 5.5V input limit is compatible with the application's power supply specifications.

Frequently Asked Questions (FAQ)

Q: Can MIC5259-2.85YD5-TR directly replace MIC5259-2.85BD5-TR?

A: Yes. Both parts are from Microchip Technology with identical output voltage (2.85V), output current (300mA), voltage dropout (0.55V @ 300mA), quiescent current (150 µA), PSRR characteristics, and TSOT-23-5 package. The primary difference is product status: the original is discontinued while the substitute is active. ROHS3 compliance of the substitute addresses regulatory requirements.

Q: What are the key differences between the two substitute options?

A: MIC5259-2.85YD5-TR maintains complete electrical and performance parity with the original part. ADP122AUJZ-2.85-R7 offers improved efficiency with lower dropout voltage (0.15V vs. 0.55V) and lower quiescent current (105 µA vs. 150 µA), but operates with a maximum input voltage of 5.5V instead of 6V. Both maintain the same output voltage, current rating, package type, and operating temperature range.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the TSOT-23-5 package with identical pinout and control features (Enable, Over Current, Over Temperature, UVLO protection). Direct PCB substitution is possible without layout modifications.

Q: Which substitute should be selected for new designs?

A: MIC5259-2.85YD5-TR is recommended for designs requiring direct compatibility with existing specifications and manufacturer continuity. ADP122AUJZ-2.85-R7 is suitable for applications where the 5.5V input voltage limit is acceptable and where the improved dropout voltage and lower quiescent current provide design advantages.

Q: What compliance certifications apply to these parts?

A: MIC5259-2.85BD5-TR is RoHS non-compliant. Both MIC5259-2.85YD5-TR and ADP122AUJZ-2.85-R7 are ROHS3 compliant. All three parts are REACH unaffected and classified under ECCN EAR99.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message