BD25KA5WFP-E2 Equivalent & Substitute Parts

Part Overview

The BD25KA5WFP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to deliver a fixed 2.5V output at 500mA with a maximum dropout voltage of 0.2V at 200mA. This device is classified as a positive fixed output regulator with integrated over-current, over-temperature, and soft-start protection features. The part is currently in active production status with 4644 units available in stock.

Substitute parts are identified when equivalent electrical performance and functional characteristics can be maintained within the specified parameter ranges, allowing for design flexibility, supply chain optimization, or alternative sourcing requirements.

Substiute Parts

BD25KA5WFP-E2

Rohm SemiconductorIn Stock: 4695BD25KA5WFP-E2 Datasheet

Current PartRFQ

LP38691SD-2.5/NOPB

Texas InstrumentsIn Stock: 3338LP38691SD-2.5/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BD25KA5WFP-E2 is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Output current capability of 500mA minimum
• Maximum input voltage rating of 5.5V or higher
• Dropout voltage performance suitable for the application
• Surface mount packaging with compatible pinout
• Active product status and RoHS3 compliance

The LP38691SD-2.5/NOPB from Texas Instruments meets these substitution criteria. While packaging differs (6-WSON versus TO-252-5), both devices deliver identical output voltage and current specifications with compatible electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the BD25KA5WFP-E2 and LP38691SD-2.5/NOPB are active production devices with RoHS3 compliance and REACH unaffected status. Selection between these parts depends on application-specific requirements:

The BD25KA5WFP-E2 provides superior dropout voltage performance (0.2V at 200mA) and is suitable for applications requiring minimal voltage headroom. The TO-252-5 package offers established thermal management characteristics for this form factor.

The LP38691SD-2.5/NOPB features lower quiescent current (55 µA versus 550 µA), extended maximum input voltage rating (10V versus 5.5V), and automotive-grade qualification (AEC-Q100). The 6-WSON package provides a smaller footprint. The higher dropout voltage (0.73V at 500mA) requires verification against minimum input voltage availability in the target application.

Both devices maintain identical output voltage and current specifications, ensuring functional equivalence for 2.5V/500mA regulation requirements.

Frequently Asked Questions (FAQ)

Q: Can the LP38691SD-2.5/NOPB directly replace the BD25KA5WFP-E2 in existing designs?

A: Electrical substitution is possible due to matching output voltage (2.5V) and current (500mA) specifications. However, package differences (TO-252-5 versus 6-WSON) require PCB layout modifications. The higher dropout voltage of the LP38691SD-2.5/NOPB must be evaluated against the minimum input voltage available in your circuit.

Q: What are the key differences in dropout voltage between these parts?

A: The BD25KA5WFP-E2 specifies 0.2V maximum dropout at 200mA, while the LP38691SD-2.5/NOPB specifies 0.73V maximum dropout at 500mA. Applications with tight input voltage margins may require the lower dropout performance of the BD25KA5WFP-E2.

Q: Are both parts suitable for automotive applications?

A: The LP38691SD-2.5/NOPB carries AEC-Q100 automotive qualification. The BD25KA5WFP-E2 does not specify automotive qualification in the provided data. Automotive applications should verify qualification requirements against design specifications.

Q: How do quiescent current differences affect power consumption?

A: The LP38691SD-2.5/NOPB draws 55 µA quiescent current compared to 550 µA for the BD25KA5WFP-E2. In battery-powered or low-power standby applications, the LP38691SD-2.5/NOPB provides a 10-fold reduction in idle current consumption.

Q: What is the impact of package type on thermal performance?

A: The TO-252-5 (DPAK) package and 6-WSON (3x3) package have different thermal characteristics. PCB layout, copper area, and thermal vias must be re-evaluated when switching between these packages to maintain equivalent thermal performance.

Q: Are there any control feature differences between these regulators?

A: The BD25KA5WFP-E2 includes an Enable control feature; the LP38691SD-2.5/NOPB does not specify this feature. Applications requiring enable/disable functionality must use the BD25KA5WFP-E2 or verify alternative control methods.