PAM3101DAB280 Equivalent & Substitute Parts

Part Overview

The PAM3101DAB280 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 2.8V output at 300mA in a compact SOT-23-5 surface mount package. This part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing production and design continuity. The PAM3101DAB280 provides positive fixed output regulation with integrated protection features including over-current, over-temperature, and short-circuit protection, along with an enable control feature for power management applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	PAM3101DAB280
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Voltage (Fixed)	2.8V
Output Current	300mA
Input Voltage (Max)	5.5V
Voltage Dropout (Max)	0.45V @ 300mA
Quiescent Current	90 µA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature Range	-40°C to 85°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the PAM3101DAB280 are qualified based on the following critical parameters that determine functional equivalence:

Core Electrical Parameters:

Fixed output voltage of 2.8V
Output current capability of 300mA minimum
Input voltage rating of 5.5V or higher
Voltage dropout specification of 0.45V or lower at 300mA
Quiescent current within acceptable operating range
Positive fixed output configuration with single regulator

Package Compatibility:

SOT-23-5 or TSOT-23-5 surface mount packages (mechanically and electrically compatible)

Protection & Control:

Over-current and over-temperature protection (minimum required)
Enable control feature (preferred for functional compatibility)

Compliance:

ROHS3 compliance
Active product status (preferred for long-term availability)

The substitute parts listed below meet these criteria and are suitable for direct replacement in applications requiring a 2.8V, 300mA linear voltage regulator in SOT-23-5 form factor.

Parameter Comparison

Parameter	PAM3101DAB280	AP2127K-2.8TRG1	MIC5323-2.8YD5-TR	RT9193-28GB	RT9193-28GJ5
Manufacturer	Diodes Incorporated	Diodes Incorporated	Microchip Technology	Richtek USA Inc.	Richtek USA Inc.
Output Voltage	2.8V	2.8V	2.8V	2.8V	2.8V
Output Current	300mA	300mA	300mA	300mA	300mA
Input Voltage (Max)	5.5V	6V	5.5V	5.5V	5.5V
Voltage Dropout (Max)	0.45V @ 300mA	0.3V @ 300mA	0.22V @ 300mA	0.3V @ 300mA	0.3V @ 300mA
Quiescent Current	90 µA	90 µA	150 µA	130 µA	130 µA
Package Type	SOT-23-5	SOT-23-5	TSOT-23-5	SOT-23-5	TSOT-23-5
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

AP2127K-2.8TRG1 (Diodes Incorporated): This part is an active product from the same manufacturer as the obsolete PAM3101DAB280. It provides improved voltage dropout performance (0.3V vs. 0.45V) and maintains identical quiescent current specifications. The higher maximum input voltage rating (6V vs. 5.5V) offers additional design margin. Both parts share the same operating temperature range and SOT-23-5 package footprint. This is the preferred substitute for direct replacement in existing designs.

MIC5323-2.8YD5-TR (Microchip Technology): This active product offers the lowest voltage dropout specification (0.22V @ 300mA) among all substitutes, resulting in improved efficiency and reduced thermal dissipation. It features an extended operating temperature range (-40°C to 125°C) and superior PSRR performance (80dB ~ 65dB). The TSOT-23-5 package is mechanically compatible with SOT-23-5 footprints. Higher quiescent current (150 µA) and MSL rating of 1 (Unlimited) are notable characteristics. This part is suitable for applications requiring enhanced performance specifications.

RT9193-28GB (Richtek USA Inc.): This active product in standard SOT-23-5 package provides 0.3V dropout voltage and extended temperature range (-40°C to 125°C). It includes enable control and comprehensive protection features. PSRR performance is 70dB ~ 50dB (100Hz ~ 10kHz). This part maintains compatibility with existing PCB layouts designed for the PAM3101DAB280.

RT9193-28GJ5 (Richtek USA Inc.): This variant is identical in electrical specifications to RT9193-28GB but is packaged in TSOT-23-5 (thin SOT-23-5) form factor. It is suitable for applications where space constraints or specific assembly requirements necessitate the thinner package variant.

All substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the PAM3101DAB280?

A: Yes. All listed substitute parts meet the core electrical requirements: 2.8V fixed output, 300mA output current, and compatible SOT-23-5 or TSOT-23-5 packaging. Electrical and mechanical compatibility is confirmed. However, verify PCB layout and thermal design considerations for your specific application.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: TSOT-23-5 is a thinner variant of the SOT-23-5 package. Both are mechanically and electrically compatible for PCB mounting. TSOT-23-5 is preferred in space-constrained applications. Footprint dimensions are similar, allowing use in existing SOT-23-5 layouts.

Q: Why does the AP2127K-2.8TRG1 have a higher maximum input voltage (6V) than the original PAM3101DAB280 (5.5V)?

A: The AP2127K-2.8TRG1 is designed with a higher input voltage rating, providing additional design margin and flexibility. This does not affect compatibility; it simply allows operation at higher input voltages if required by your application.

Q: Which substitute offers the best efficiency?

A: The MIC5323-2.8YD5-TR provides the lowest voltage dropout (0.22V @ 300mA), resulting in the lowest power dissipation and highest efficiency among the listed substitutes. This is beneficial for battery-powered or thermally constrained applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the compliance status of the original PAM3101DAB280.

Q: What is the MSL (Moisture Sensitivity Level) rating, and why does it matter?

A: MSL indicates the maximum time a component can be exposed to moisture before soldering. MSL 1 (Unlimited) parts like MIC5323-2.8YD5-TR and PAM3101DAB280 have no time restrictions. MSL 3 (168 Hours) parts require soldering within 168 hours of package opening. For high-volume production or extended storage, MSL 1 parts are preferred.

Q: Can I use RT9193-28GJ5 (TSOT-23-5) in a PCB designed for SOT-23-5?

A: Yes. TSOT-23-5 and SOT-23-5 packages share compatible footprints and pin assignments. The thinner profile of TSOT-23-5 will not cause assembly or electrical issues on a standard SOT-23-5 layout.

Q: Which substitute has the widest operating temperature range?

A: MIC5323-2.8YD5-TR, RT9193-28GB, and RT9193-28GJ5 all support -40°C to 125°C, compared to the original PAM3101DAB280 and AP2127K-2.8TRG1 which support -40°C to 85°C. Extended temperature range is beneficial for industrial or automotive applications.

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