AP7340D-32FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7340D-32FS4-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 3.2V output at 150mA. This device operates across the industrial temperature range of -40°C to 85°C and is housed in a 4-XDFN package with exposed pad. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this power management application.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	3.2	V
Output Current	150	mA
Input Voltage (Max)	5.25	V
Voltage Dropout (Max)	0.27	V @ 150mA
Quiescent Current	50	µA
PSRR	75	dB (1kHz)
Operating Temperature	-40 to 85	°C
Package Type	4-XDFN Exposed Pad	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the AP7340D-32FS4-7 is determined by the following criteria:

Fixed output voltage of 3.2V
Output current capability of 150mA or greater
Maximum input voltage of 5.25V or higher
Voltage dropout specification compatible with system requirements
Surface mount package with exposed pad configuration
Active product status
ROHS3 compliance and MSL 1 rating
Operating temperature range of -40°C to 85°C or wider

The BU32TD2WNVX-TL meets these substitution criteria with the following alignment: identical fixed output voltage (3.2V), higher output current capability (200mA), compatible input voltage rating (6V maximum), surface mount package (4-UDFN Exposed Pad), active status, ROHS3 compliance, and matching temperature range.

Parameter Comparison

Parameter	AP7340D-32FS4-7	BU32TD2WNVX-TL	Unit
Manufacturer	Diodes Incorporated	Rohm Semiconductor	—
Output Voltage (Fixed)	3.2	3.2	V
Output Current	150	200	mA
Input Voltage (Max)	5.25	6	V
Voltage Dropout (Max)	0.27	0.42	V @ rated current
Quiescent Current	50	60	µA
PSRR	75	70	dB (1kHz)
Operating Temperature	-40 to 85	-40 to 85	°C
Package Type	4-XDFN Exposed Pad	4-UDFN Exposed Pad	—
Product Status	Active	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

Both the AP7340D-32FS4-7 and BU32TD2WNVX-TL are active production devices with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for industrial applications. The BU32TD2WNVX-TL provides higher output current capability (200mA versus 150mA) and a higher maximum input voltage rating (6V versus 5.25V), offering greater design margin in applications where these parameters are not constrained.

The voltage dropout specification of the BU32TD2WNVX-TL is 0.42V at rated current, compared to 0.27V for the AP7340D-32FS4-7. This difference must be evaluated against specific system power supply and thermal requirements. The PSRR specification of the AP7340D-32FS4-7 (75dB at 1kHz) is marginally higher than the BU32TD2WNVX-TL (70dB at 1kHz), a difference of 5dB that may be relevant in noise-sensitive applications.

Package footprints differ between the two devices (4-XDFN versus 4-UDFN), requiring PCB layout verification before substitution.

Frequently Asked Questions (FAQ)

Q: Can the BU32TD2WNVX-TL directly replace the AP7340D-32FS4-7 on an existing PCB?

A: Direct PCB replacement is not possible without layout modification. The AP7340D-32FS4-7 uses a 4-XDFN package while the BU32TD2WNVX-TL uses a 4-UDFN package. Although both are 4-pin exposed pad packages, the footprint dimensions differ. PCB artwork must be updated to accommodate the substitute part's package geometry.

Q: What are the key electrical differences between these two parts?

A: The primary electrical differences are output current capability (150mA versus 200mA), maximum input voltage (5.25V versus 6V), voltage dropout (0.27V versus 0.42V at rated current), and PSRR (75dB versus 70dB at 1kHz). The fixed output voltage of 3.2V and operating temperature range are identical.

Q: Is the higher output current of the BU32TD2WNVX-TL always beneficial?

A: Higher output current capability provides design margin but does not improve performance in applications where the AP7340D-32FS4-7's 150mA rating is sufficient. The increased voltage dropout of the BU32TD2WNVX-TL may be a limiting factor in low-input-voltage applications.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the AP7340D-32FS4-7 and BU32TD2WNVX-TL are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: What should be verified before implementing a substitution?

A: Verify PCB footprint compatibility, confirm that the higher voltage dropout of the BU32TD2WNVX-TL does not violate system power supply specifications, and validate that the marginally lower PSRR does not impact noise performance in the target application. Thermal performance should be assessed based on actual load current and ambient temperature conditions.

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