AP7342D-1818FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7342D-1818FS6-7 is a linear voltage regulator IC from Diodes Incorporated designed for dual-output positive fixed voltage regulation at 1.8V with 150mA per output channel. This device operates in the Power Management (PMIC) category and is packaged in a 6-pin X2-DFN1212-6 surface mount configuration with exposed pad.

The AP7342D-1818FS6-7 is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring dual 1.8V regulated outputs with the specified electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Configuration	Positive
Number of Regulators	2
Voltage - Output (Fixed)	1.8V, 1.8V
Current - Output	150mA, 150mA
Voltage - Input (Max)	5.25V
Voltage Dropout (Max)	0.39V @ 150mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	6-XFDFN Exposed Pad
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AP7342D-1818FS6-7 is determined by the following critical parameters:

Dual positive fixed output voltage regulation at 1.8V per channel
Maximum input voltage of 5.25V
Operating temperature range of -40°C to 85°C
Surface mount packaging with exposed pad configuration
ROHS3 compliance and MSL Level 1 rating

The AP7345D-1818RH4-7 qualifies as a substitute based on matching output voltage configuration (1.8V, 1.8V), input voltage specification (5.25V max), operating temperature range (-40°C to 85°C), surface mount technology, and regulatory compliance (ROHS3, MSL 1). The substitute part provides increased output current capability (300mA per channel versus 150mA) and remains within the same manufacturer ecosystem, ensuring design compatibility at the functional level.

Parameter Comparison

Parameter	AP7342D-1818FS6-7	AP7345D-1818RH4-7
Manufacturer	Diodes Incorporated	Diodes Incorporated
Category	Power Management (PMIC)	Power Management (PMIC)
Output Configuration	Positive	Positive
Number of Regulators	2	2
Voltage - Output (Fixed)	1.8V, 1.8V	1.8V, 1.8V
Voltage - Input (Max)	5.25V	5.25V
Current - Output	150mA, 150mA	300mA, 300mA
Voltage Dropout (Max)	0.39V @ 150mA	0.39V @ 300mA
Current - Quiescent (Iq)	100 µA	140 µA
PSRR	75dB (1kHz)	75dB (1kHz)
Control Features	Enable	Current Limit, Enable
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	6-XFDFN Exposed Pad	8-XFDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
Product Status	Last Time Buy	Active

Engineering Selection Recommendations

The AP7345D-1818RH4-7 is suitable as a substitute for the AP7342D-1818FS6-7 based on the following engineering criteria:

Both devices maintain identical output voltage specifications (1.8V dual channel), input voltage limits (5.25V maximum), and operating temperature range (-40°C to 85°C). Both are ROHS3 compliant with MSL Level 1 rating, ensuring equivalent environmental and regulatory qualification.

The AP7345D-1818RH4-7 carries Active product status, providing long-term supply availability compared to the Last Time Buy designation of the original part. The substitute offers increased output current per channel (300mA versus 150mA), which provides design margin for applications requiring higher load capability without exceeding the specified input voltage or temperature operating envelope.

Package differences exist: the original uses 6-pin X2-DFN1212-6 while the substitute uses 8-pin X2-DFN1612-8. PCB layout modifications are required to accommodate the different pin count and package footprint.

Frequently Asked Questions (FAQ)

Q: Can the AP7345D-1818RH4-7 directly replace the AP7342D-1818FS6-7 without circuit modifications?

A: Functional substitution is possible due to matching output voltage (1.8V dual channel), input voltage specification (5.25V max), and operating temperature range. However, the package change from 6-pin to 8-pin and the different footprint (X2-DFN1212-6 to X2-DFN1612-8) requires PCB layout redesign. Pin assignment must be verified against the respective datasheets before implementation.

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

A: The primary electrical difference is output current capability: the AP7342D provides 150mA per channel while the AP7345D provides 300mA per channel. Both maintain 0.39V maximum dropout voltage at their respective rated currents. Quiescent current increases from 100 µA to 140 µA in the substitute. The AP7345D adds Current Limit control feature in addition to Enable control.

Q: Are both parts suitable for the same temperature range applications?

A: Yes. Both devices operate across the identical temperature range of -40°C to 85°C, ensuring equivalent thermal performance in specified operating environments.

Q: What compliance certifications apply to both parts?

A: Both the AP7342D-1818FS6-7 and AP7345D-1818RH4-7 are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity rating. Both are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: Does the increased output current of the substitute affect power dissipation or thermal design?

A: The substitute's higher current capability (300mA versus 150mA) may result in increased power dissipation under full load conditions. Thermal design review is necessary to ensure the 8-pin package provides adequate heat dissipation for the intended application load profile.

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