PAM2400ACA270 Equivalent & Substitute Parts

Part Overview

The PAM2400ACA270 is a boost switching regulator IC from Diodes Incorporated designed for step-up voltage conversion applications. It delivers a fixed 2.7V output at 400mA (switch current) from input voltages ranging from 0.9V to 5.5V, operating at 100kHz switching frequency with integrated synchronous rectification. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PAM2400ACA270

Diodes IncorporatedIn Stock: 1081PAM2400ACA270 Datasheet

Current PartRFQ

RT9261-27GX

Richtek USA Inc.In Stock: 4149RT9261-27GX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PAM2400ACA270 is determined by the following critical parameters:

• Output Voltage (Fixed): Must be 2.7V to maintain circuit voltage requirements
• Package / Case: Must be TO-243AA (SOT-89-3) for mechanical and thermal compatibility
• Topology: Must be boost (step-up) configuration
• Output Configuration: Must be positive output
• Number of Outputs: Must be single output (1)
• Mounting Type: Must be surface mount

The RT9261-27GX meets these core substitution criteria. However, the output current specification differs significantly: the RT9261-27GX provides 60mA (switch) compared to the PAM2400ACA270's 400mA. This reduction in current capacity represents a functional limitation that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The RT9261-27GX is the identified substitute for the obsolete PAM2400ACA270 based on matching output voltage (2.7V fixed), identical package configuration (TO-243AA / SOT-89-3), and active product status. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Selection of the RT9261-27GX requires verification that the reduced output current specification (60mA versus 400mA) is compatible with the target application's load requirements. The RT9261-27GX's wider input voltage range (1V to 7V) and absence of synchronous rectification are secondary considerations dependent on circuit topology and efficiency targets.

The RT9261-27GX's higher moisture sensitivity level (MSL 3 versus MSL 1) may impact storage and handling procedures in high-humidity environments.

Frequently Asked Questions (FAQ)

Q: Can the RT9261-27GX directly replace the PAM2400ACA270 in existing designs?

A: Mechanical and electrical compatibility exists at the package level (TO-243AA / SOT-89-3) and output voltage specification (2.7V fixed). However, the output current capacity reduction from 400mA to 60mA requires load analysis to confirm suitability for the specific application.

Q: What are the key differences between these two devices?

A: The primary differences are output current capacity (400mA versus 60mA), synchronous rectifier presence (yes versus no), input voltage range (0.9V–5.5V versus 1V–7V), and operating temperature minimum (-40°C versus -20°C). The RT9261-27GX has higher moisture sensitivity (MSL 3 versus MSL 1).

Q: Are both devices compliant with current regulatory standards?

A: Yes. Both the PAM2400ACA270 and RT9261-27GX are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does the absence of synchronous rectification in the RT9261-27GX affect performance?

A: Synchronous rectification impacts efficiency and thermal performance. The RT9261-27GX's lack of this feature may result in higher power dissipation compared to the PAM2400ACA270, depending on operating conditions and load characteristics.

Q: What is the significance of the different moisture sensitivity levels?

A: MSL 1 (unlimited) allows indefinite storage without moisture absorption concerns. MSL 3 (168 hours) requires controlled storage conditions and may necessitate baking procedures before reflow soldering if storage limits are exceeded.