AP7340-25FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7340-25FS4-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 2.5V output at 150mA with a maximum dropout voltage of 0.3V. This Surface Mount device in 4-XDFN Exposed Pad packaging is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements necessitate alternative electrical or thermal performance characteristics within the same functional category.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP7340-25FS4-7
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Voltage (Fixed)	2.5V
Output Current	150mA
Voltage Dropout (Max)	0.3V @ 150mA
Input Voltage (Max)	5.25V
Quiescent Current	50 µA
Operating Temperature	-40°C ~ 85°C
Package / Case	4-XDFN Exposed Pad
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AP7340-25FS4-7 are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Fixed output voltage of 2.5V
Output current capability (150mA minimum required)
Maximum input voltage compatibility (5.25V or higher)
Voltage dropout performance
Surface Mount packaging with 4-pin configuration
Operating temperature range (-40°C to 85°C minimum)
ROHS3 compliance and active product status

Substitution Categories:

Parametric Equivalent (Direct Replacement): AP7340D-25FS4-7 matches all electrical specifications and packaging requirements identically to the main part.

Higher Current Capability Substitutes: BU25UA3WNVX-TL (300mA), LP5907SNX-2.5/NOPB (250mA), and NCP161BMX250TBG (450mA) provide increased output current capacity while maintaining 2.5V fixed output and compatible package footprints. These are suitable when design margins or load requirements exceed 150mA.

Low Quiescent Current Substitute: MCP1711T-25I/5X offers significantly reduced quiescent current (1.27 µA) compared to the main part (50 µA), beneficial for battery-powered or ultra-low-power applications, though with higher dropout voltage (0.92V @ 150mA).

Enhanced Temperature Range Substitute: MIC5365-2.5YMT-TZ and NCP161BMX250TBG extend operating temperature to -40°C ~ 125°C, providing thermal margin beyond the main part's -40°C ~ 85°C range.

Parameter Comparison

Parameter	AP7340-25FS4-7	AP7340D-25FS4-7	BU25UA3WNVX-TL	LP5907SNX-2.5/NOPB	MCP1711T-25I/5X	MIC5365-2.5YMT-TZ	NCP161BMX250TBG
Manufacturer	Diodes Inc.	Diodes Inc.	Rohm Semi.	Texas Instruments	Microchip	Microchip	onsemi
Output Voltage	2.5V	2.5V	2.5V	2.5V	2.5V	2.5V	2.5V
Output Current	150mA	150mA	300mA	250mA	150mA	150mA	450mA
Input Voltage (Max)	5.25V	5.25V	5.5V	5.5V	6V	5.5V	5.5V
Dropout Voltage (Max)	0.3V @ 150mA	0.3V @ 150mA	0.22V @ 300mA	0.25V @ 250mA	0.92V @ 150mA	0.38V @ 150mA	0.315V @ 450mA
Quiescent Current	50 µA	50 µA	90 µA	25 µA	1.27 µA	39 µA	23 µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	4-XDFN Exposed Pad	4-XDFN Exposed Pad	4-UDFN Exposed Pad	4-XDFN Exposed Pad	4-UDFN Exposed Pad	4-TMLF® / 4-UDFN	4-XDFN Exposed Pad
Product Status	Active	Active	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

AP7340D-25FS4-7: Select this part as the primary substitute when direct replacement is required. It maintains identical electrical specifications and packaging to the main part while offering alternative inventory availability from the same manufacturer.

LP5907SNX-2.5/NOPB: This Texas Instruments part is recommended for designs requiring extended operating temperature range (-40°C ~ 125°C) and improved quiescent current performance (25 µA). The 4-XDFN package footprint is compatible with the main part. Product status is Active with ROHS3 compliance.

NCP161BMX250TBG: Select this onsemi part when higher output current capacity (450mA) is required within the same 2.5V output specification. Extended temperature range (-40°C ~ 125°C) and low quiescent current (23 µA) provide additional design margin. Package footprint is 4-XDFN Exposed Pad, compatible with the main part layout.

MIC5365-2.5YMT-TZ: This Microchip part offers extended operating temperature (-40°C ~ 125°C) and enhanced PSRR performance (80dB ~ 65dB). Package options include 4-TMLF® and 4-UDFN configurations. Product status is Active with ROHS3 compliance.

MCP1711T-25I/5X: Select this part only when ultra-low quiescent current (1.27 µA) is the primary design requirement. Note the significantly higher dropout voltage (0.92V @ 150mA) compared to the main part (0.3V @ 150mA). This characteristic limits suitability to applications with adequate input voltage margin. Product status is Active.

BU25UA3WNVX-TL: This Rohm Semiconductor part is not recommended for new designs due to its "Not For New Designs" product status, despite offering 300mA output current capability. Use only when existing design validation or legacy system requirements mandate this specific part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher output current rating than the main part?

A: Yes. Parts with higher current ratings (BU25UA3WNVX-TL at 300mA, LP5907SNX-2.5/NOPB at 250mA, NCP161BMX250TBG at 450mA) are functionally compatible substitutes provided all other parameters remain within design specifications. Higher current capability does not negatively impact circuits designed for lower current operation.

Q: What is the significance of dropout voltage differences between substitute parts?

A: Dropout voltage determines the minimum input-to-output voltage differential required for proper regulation. The main part specifies 0.3V @ 150mA. Substitutes with lower dropout voltage (BU25UA3WNVX-TL at 0.22V, LP5907SNX-2.5/NOPB at 0.25V) provide better efficiency and lower heat dissipation. MCP1711T-25I/5X with 0.92V dropout requires higher input voltage headroom and is suitable only for applications with adequate supply margin.

Q: Are package footprints interchangeable between substitute parts?

A: The main part uses 4-XDFN Exposed Pad packaging. LP5907SNX-2.5/NOPB and NCP161BMX250TBG use identical 4-XDFN packaging and are direct PCB layout substitutes. BU25UA3WNVX-TL, MCP1711T-25I/5X, and MIC5365-2.5YMT-TZ use 4-UDFN or 4-TMLF® packages with different footprints, requiring PCB layout modification.

Q: Why is BU25UA3WNVX-TL marked "Not For New Designs"?

A: This product status indicates the manufacturer has discontinued active development and recommends alternative parts for new circuit designs. Existing designs already validated with this part may continue using it, but new projects should select from Active status alternatives.

Q: Which substitute part is best for battery-powered applications?

A: MCP1711T-25I/5X offers the lowest quiescent current at 1.27 µA, minimizing standby power consumption. However, verify that the 0.92V dropout voltage is acceptable for your input voltage range. For balanced performance, LP5907SNX-2.5/NOPB (25 µA quiescent current) or NCP161BMX250TBG (23 µA quiescent current) provide lower power consumption than the main part while maintaining lower dropout voltage.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), matching the environmental and handling requirements of the main part.

Q: What is the temperature range consideration for substitute selection?

A: The main part operates -40°C ~ 85°C. LP5907SNX-2.5/NOPB, MIC5365-2.5YMT-TZ, and NCP161BMX250TBG extend this to -40°C ~ 125°C, providing thermal margin for high-temperature environments. Select extended-range parts when ambient or self-heating conditions approach 85°C.

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