PAM2303BECADJR Equivalent & Substitute Parts

Part Overview

The PAM2303BECADJR is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications with 3A output current capability. This component operates as a step-down converter with adjustable output voltage ranging from 0.6V to 5.5V and input voltage range of 2.7V to 5.5V. The device is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

PAM2303BECADJR

Diodes IncorporatedIn Stock: 3347PAM2303BECADJR Datasheet

Current PartRFQ

L5987ATR

STMicroelectronicsIn Stock: 5940L5987ATR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PAM2303BECADJR is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Output topology: Buck (step-down) converter
• Output configuration: Positive adjustable
• Minimum output voltage: 0.6V or lower
• Maximum output voltage: 5.5V or higher
• Output current capability: 3A or greater
• Input voltage range: Must accommodate 2.7V to 5.5V minimum
• Number of outputs: Single output

Mechanical Compatibility Criteria:

• Package type: 8-SOIC with exposed pad
• Mounting type: Surface mount
• Pin count and footprint: 8-pin SOIC (0.154", 3.90mm width)

Compliance & Certification:

• RoHS3 compliance required
• MSL rating: 3 or better

The L5987ATR from STMicroelectronics meets these substitution criteria while offering extended input and output voltage ranges, broader operating temperature range, and active product status.

Parameter Comparison

Engineering Selection Recommendations

The L5987ATR is a qualified substitute for the PAM2303BECADJR based on the following factors:

Functional Equivalence: Both devices implement identical buck converter topology with positive adjustable output, single output configuration, and 3A output current rating. Pin-compatible 8-SOIC packaging with exposed pad ensures mechanical interchangeability on existing PCB layouts.

Electrical Compatibility: The L5987ATR accommodates the PAM2303BECADJR operating envelope across all critical parameters. Input voltage range (2.9V to 18V) and output voltage range (0.6V to 18V) both exceed the original specification, providing design margin. Output current capability matches at 3A.

Compliance & Certification: Both components maintain ROHS3 compliance and identical MSL rating (3, 168 hours), ensuring compatibility with standard manufacturing and storage protocols.

Product Status Advantage: The L5987ATR holds active product status with ongoing manufacturer support, addressing the obsolescence of the PAM2303BECADJR. This ensures long-term availability and access to technical documentation.

Switching Frequency Consideration: The L5987ATR operates at 250kHz to 1MHz, with maximum frequency below the PAM2303BECADJR's 1.5MHz specification. Applications requiring the higher switching frequency of the original device should evaluate this parameter against specific design requirements.

Frequently Asked Questions (FAQ)

Q: Can the L5987ATR directly replace the PAM2303BECADJR without PCB modifications?

A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm width) exposed pad packaging with matching pin configurations. No PCB layout changes are required for mechanical and electrical substitution.

Q: What is the significance of the switching frequency difference between these devices?

A: The PAM2303BECADJR operates at 1.5MHz, while the L5987ATR operates at 250kHz to 1MHz. Higher switching frequency typically results in smaller output filter components. Applications with strict size constraints or specific EMI requirements should evaluate whether the lower maximum frequency of the L5987ATR affects design performance.

Q: Are there any input voltage range limitations when substituting?

A: The L5987ATR minimum input voltage is 2.9V compared to the PAM2303BECADJR at 2.7V. For applications operating below 2.9V input, the L5987ATR is not suitable. For applications within the 2.9V to 5.5V range, both devices are equivalent.

Q: Does the L5987ATR support the same output voltage adjustment range?

A: Yes. Both devices support adjustable output from 0.6V to their respective maximum ratings. The L5987ATR's extended maximum output voltage (18V vs. 5.5V) does not affect compatibility for applications requiring 0.6V to 5.5V output range.

Q: What compliance certifications apply to both devices?

A: Both the PAM2303BECADJR and L5987ATR are ROHS3 compliant with MSL rating 3 (168 hours). Both carry identical moisture sensitivity classification, ensuring compatibility with standard PCB assembly and storage procedures.

Q: Why is the L5987ATR recommended despite the PAM2303BECADJR being in stock?

A: The PAM2303BECADJR is classified as obsolete, indicating discontinued production and limited long-term availability. The L5987ATR maintains active product status with ongoing manufacturer support, providing design continuity and future availability assurance for production and field service applications.