BD25KA5FP-E2 Equivalent & Substitute Parts

Part Overview

The BD25KA5FP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to deliver a fixed 2.5V output at 500mA in a surface-mount TO-252-3 (DPAK) package. This Active product is widely used in power management applications requiring stable low-voltage regulation with integrated over-current, over-temperature, and soft-start protection. Equivalent and substitute parts are identified based on matching output voltage, package compatibility, and electrical performance within acceptable operating parameters.

Key Parameters

Parameter	BD25KA5FP-E2
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	2.5V
Output Current	500mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.2V @ 200mA
Package / Case	TO-252-3, DPAK (2 Leads + Tab)
Operating Temperature	-40°C ~ 105°C
Protection Features	Over Current, Over Temperature, Soft Start
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the BD25KA5FP-E2 are selected based on the following criteria:

Fixed output voltage of 2.5V
Surface-mount TO-252-3 (DPAK) package compatibility
Output current rating of 500mA or higher
Input voltage rating of 5.5V or higher
Operating temperature range overlap with -40°C minimum
Active product status
ROHS3 compliance and REACH unaffected status

Three substitute parts meet these substitution criteria: AP7361-25D-13 (Diodes Incorporated), KF25BDT-TR (STMicroelectronics), and LD39150DT25-R (STMicroelectronics).

Parameter Comparison

Parameter	BD25KA5FP-E2	AP7361-25D-13	KF25BDT-TR	LD39150DT25-R
Manufacturer	Rohm Semiconductor	Diodes Incorporated	STMicroelectronics	STMicroelectronics
Output Voltage (Fixed)	2.5V	2.5V	2.5V	2.5V
Output Current	500mA	1A	500mA	1.5A
Input Voltage (Max)	5.5V	6V	20V	6V
Dropout Voltage (Max)	0.2V @ 200mA	0.7V @ 1A	0.7V @ 500mA	0.4V @ 1.5A
Quiescent Current (Iq)	550 µA	90 µA	1 mA	2.5 mA
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Operating Temperature	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Soft Start	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are Active products with ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the BD25KA5FP-E2.

AP7361-25D-13 provides higher output current (1A) with lower quiescent current (90 µA) but operates to a maximum temperature of 85°C, which is 20°C lower than the primary part.

KF25BDT-TR supports the widest input voltage range (20V maximum) and highest operating temperature (125°C), with quiescent current of 1 mA. Output current matches the primary part at 500mA.

LD39150DT25-R offers the highest output current (1.5A) and lowest dropout voltage (0.4V @ 1.5A), with operating temperature to 125°C. Quiescent current is 2.5 mA.

Selection should be based on specific application requirements for output current, input voltage range, operating temperature, and quiescent current performance.

Frequently Asked Questions (FAQ)

Q: Can AP7361-25D-13 replace BD25KA5FP-E2 in all applications?

A: AP7361-25D-13 is compatible for applications requiring 2.5V output in TO-252-3 package. The maximum operating temperature of 85°C is lower than BD25KA5FP-E2 (105°C). Applications operating above 85°C require alternative selection.

Q: What is the primary advantage of KF25BDT-TR over the original part?

A: KF25BDT-TR supports input voltage up to 20V compared to 5.5V for BD25KA5FP-E2, and operates to 125°C. These characteristics suit applications with higher input voltage or extended temperature requirements.

Q: Is LD39150DT25-R suitable for higher current applications?

A: LD39150DT25-R is rated for 1.5A output current, exceeding the 500mA rating of BD25KA5FP-E2. This part is suitable for applications requiring higher current delivery while maintaining 2.5V fixed output.

Q: Are all substitute parts in the same package?

A: All substitute parts use TO-252-3 (DPAK) package with 2 leads plus tab, matching the physical footprint of BD25KA5FP-E2 for direct board-level compatibility.

Q: Do all parts meet the same compliance standards?

A: All listed parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of BD25KA5FP-E2.

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