PAM3101DAB250 Equivalent & Substitute Parts

Part Overview

The PAM3101DAB250 is a linear voltage regulator IC from Diodes Incorporated, delivering a fixed 2.5V output at 300mA in a compact SOT-23-5 surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The regulator features integrated protection against overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
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 ~ 85°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PAM3101DAB250 is determined by the following critical parameters:

Fixed output voltage of 2.5V
Minimum output current rating of 300mA
Maximum input voltage of 5.5V or higher
SOT-23-5 or TSOT-23-5 package compatibility
Surface mount technology
Protection features including overcurrent and overtemperature
RoHS3 compliance

Substitute parts are grouped into two categories based on package type: SOT-23-5 standard packages and TSOT-23-5 thin packages. Both package variants are mechanically and electrically compatible with the original PAM3101DAB250 footprint. Parts with lower quiescent current, improved dropout voltage, or extended temperature ranges are listed as active alternatives to the obsolete original part.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Operating Temp	Status
PAM3101DAB250	Diodes Incorporated	2.5V	300mA	5.5V	0.45V @ 300mA	90 µA	SOT-23-5	-40°C ~ 85°C	Obsolete
AP2127K-2.5TRG1	Diodes Incorporated	2.5V	300mA	6V	0.3V @ 300mA	90 µA	SOT-23-5	-40°C ~ 85°C	Active
ADP1712AUJZ-2.5-R7	Analog Devices Inc.	2.5V	300mA	5.5V	0.27V @ 300mA	70 µA	TSOT-23-5	-40°C ~ 125°C	Active
ADP1713AUJZ-2.5-R7	Analog Devices Inc.	2.5V	300mA	5.5V	0.27V @ 300mA	70 µA	TSOT-23-5	-40°C ~ 125°C	Active
LDK130M25R	STMicroelectronics	2.5V	300mA	5.5V	0.4V @ 300mA	60 µA	SOT-23-5	-40°C ~ 125°C	Active
MAX8887EZK25+T	Analog Devices Inc./Maxim Integrated	2.5V	300mA	5.5V	Not specified	100 µA	TSOT-23-5	-40°C ~ 85°C	Active
MAX8888EZK25+T	Analog Devices Inc./Maxim Integrated	2.5V	300mA	5.5V	Not specified	100 µA	TSOT-23-5	-40°C ~ 85°C	Active
RT9193-25GB	Richtek USA Inc.	2.5V	300mA	5.5V	Not specified	130 µA	SOT-23-5	-40°C ~ 125°C	Active
RT9193-25GJ5	Richtek USA Inc.	2.5V	300mA	5.5V	Not specified	130 µA	TSOT-23-5	-40°C ~ 125°C	Active
TPS73225DBVR	Texas Instruments	2.5V	250mA	5.5V	0.15V @ 250mA	550 µA	SOT-23-5	-40°C ~ 125°C	Active
TPS73225DBVT	Texas Instruments	2.5V	250mA	5.5V	0.15V @ 250mA	550 µA	SOT-23-5	-40°C ~ 125°C	Active

Engineering Selection Recommendations

All listed substitute parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

For direct footprint replacement with identical SOT-23-5 packaging, select from AP2127K-2.5TRG1, LDK130M25R, RT9193-25GB, TPS73225DBVR, or TPS73225DBVT. The AP2127K-2.5TRG1 from Diodes Incorporated provides the closest electrical match with improved dropout voltage performance while maintaining the same manufacturer lineage as the original part.

For applications requiring extended operating temperature range (-40°C to 125°C), ADP1712AUJZ-2.5-R7, ADP1713AUJZ-2.5-R7, LDK130M25R, RT9193-25GB, and TPS73225 variants are suitable. The ADP1712AUJZ-2.5-R7 and ADP1713AUJZ-2.5-R7 offer superior dropout voltage characteristics (0.27V) and lower quiescent current (70 µA) in TSOT-23-5 thin packages.

For automotive-grade applications, LDK130M25R carries AEC-Q100 qualification and is available in SOT-23-5 packaging.

The TPS73225DBVR and TPS73225DBVT variants from Texas Instruments provide the lowest dropout voltage (0.15V @ 250mA) but deliver 250mA output current, suitable only for applications where 250mA meets the design requirement.

Frequently Asked Questions (FAQ)

Q: Can I use TSOT-23-5 thin package parts as direct replacements for SOT-23-5 standard package parts?

A: Yes. TSOT-23-5 and SOT-23-5 packages share identical pin configurations and footprints. The primary difference is package height, with TSOT-23-5 being thinner. Both are mechanically and electrically compatible on standard PCB layouts.

Q: What is the significance of dropout voltage in selecting a substitute?

A: Dropout voltage determines the minimum voltage differential required between input and output for proper regulation. Lower dropout voltage allows operation with lower input voltages or provides better efficiency. The PAM3101DAB250 specifies 0.45V @ 300mA. Substitutes with lower dropout voltage (such as ADP1712AUJZ-2.5-R7 at 0.27V) provide improved performance in power-constrained applications.

Q: Why do some substitute parts have different quiescent current specifications?

A: Quiescent current represents the regulator's internal power consumption when delivering no load current. Lower quiescent current reduces standby power consumption. The PAM3101DAB250 specifies 90 µA. Substitutes range from 60 µA to 550 µA depending on design architecture and feature set.

Q: Are TPS73225 variants fully compatible with PAM3101DAB250 applications?

A: TPS73225DBVR and TPS73225DBVT are electrically compatible for 2.5V output applications but deliver 250mA maximum output current compared to the PAM3101DAB250's 300mA rating. These parts are suitable only for applications where 250mA output current meets design requirements.

Q: What packaging options are available for the substitute parts?

A: Substitute parts are available in two package types: SOT-23-5 (standard) and TSOT-23-5 (thin). Both packages are surface mount with identical pin configurations. Selection depends on PCB height constraints and assembly process requirements.

Q: Do all substitute parts include the same protection features as the original PAM3101DAB250?

A: All listed substitutes include overcurrent and overtemperature protection. The PAM3101DAB250 also includes short circuit protection. Most substitutes maintain this feature set, though specific protection implementations vary by manufacturer. Refer to individual datasheets for detailed protection circuit specifications.

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