AP7315-185SA-7 Equivalent & Substitute Parts

Part Overview

The AP7315-185SA-7 is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 150mA at 1.85V and is housed in a SOT-23-3 surface mount package. The device is currently in active production status with 688 units available in new original inventory. Linear voltage regulators of this specification are essential in applications requiring stable, low-noise power delivery for microcontroller power supplies, sensor circuits, and auxiliary power rails where space and thermal constraints favor compact solutions.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP7315-185SA-7
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.85V
Output Current	150mA
Input Voltage (Max)	5.25V
Dropout Voltage (Max)	0.44V @ 150mA
Package Type	SOT-23-3 (TO-236-3, SC-59)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 85°C
Product Status	Active
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP7315-185SA-7 is determined by strict equivalence across the following critical parameters:

Output voltage specification: 1.85V fixed
Output current capability: 150mA minimum
Input voltage rating: 5.25V maximum
Dropout voltage performance: 0.44V @ 150mA
Package form factor: SOT-23-3 surface mount
Electrical characteristics: PSRR 75dB (1kHz), quiescent current 60µA, over-current protection
Compliance certifications: ROHS3, REACH Unaffected status
Product status: Active manufacturing

The AP7315-185SR-7 meets all these criteria as a direct parametric equivalent, differing only in the tape reel suffix designation (SR vs. SA), which indicates packaging format variation within the same manufacturing series.

Parameter Comparison

Parameter	AP7315-185SA-7	AP7315-185SR-7	Match
Manufacturer	Diodes Incorporated	Diodes Incorporated	✓
Output Voltage	1.85V	1.85V	✓
Output Current	150mA	150mA	✓
Input Voltage (Max)	5.25V	5.25V	✓
Dropout Voltage	0.44V @ 150mA	0.44V @ 150mA	✓
Quiescent Current	60µA	60µA	✓
PSRR	75dB (1kHz)	75dB (1kHz)	✓
Package	SOT-23-3	SOT-23-3	✓
Operating Temperature	-40°C to 85°C	-40°C to 85°C	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Product Status	Active	Active	✓
Inventory Availability	688 Pcs	769 Pcs	Both in stock

Engineering Selection Recommendations

Both the AP7315-185SA-7 and AP7315-185SR-7 are active production components from Diodes Incorporated with identical electrical specifications and performance characteristics. Selection between these parts should be based on:

Packaging format requirements: The SA and SR suffixes denote different tape reel configurations. Verify your assembly equipment compatibility with the specific reel format.
Inventory availability: The AP7315-185SR-7 currently has higher stock levels (769 units vs. 688 units).
Supply chain continuity: Both parts carry active product status with ROHS3 compliance and REACH Unaffected designation, ensuring long-term availability and regulatory compliance.

For applications requiring the 1.85V, 150mA output specification in SOT-23-3 packaging, either part provides equivalent performance with no functional differentiation.

Frequently Asked Questions (FAQ)

Q: Can AP7315-185SR-7 be used as a direct replacement for AP7315-185SA-7?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output voltage, current rating, dropout voltage, and operating temperature range. The only difference is the tape reel packaging format (SA vs. SR suffix). Confirm your assembly equipment supports the specific reel configuration before substitution.

Q: What does the SA and SR suffix designation mean?

A: These suffixes indicate different tape reel packaging formats used for automated assembly. SA and SR represent variations in reel configuration, leader length, or trailer specifications. Both deliver the same component in the same SOT-23-3 package; the difference is in how the parts are wound on the reel for pick-and-place equipment.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical electrical characteristics: 1.85V fixed output, 150mA current capability, 0.44V dropout voltage at 150mA, 75dB PSRR at 1kHz, and 60µA quiescent current. They are manufactured to the same specifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both AP7315-185SA-7 and AP7315-185SR-7 are ROHS3 compliant and REACH Unaffected, with identical moisture sensitivity levels (MSL 1 - Unlimited) and EAR99 export classification.

Q: Which part should I choose if both are available?

A: Selection should be based on your assembly process requirements and reel format compatibility. If your equipment supports both formats, the AP7315-185SR-7 offers slightly higher current inventory availability (769 units). For new designs, either part is equally suitable.

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