AP7315-185SR7 Equivalent & Substitute Parts

Part Overview

The AP7315-185SR7 is a linear voltage regulator IC from Diodes Incorporated, classified as a positive fixed output power management component. This part delivers 1.85V at 150mA output current in a surface mount SOT-23-3 package. The AP7315-185SR7 is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP7315-185SR7
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.85V
Output Current	150mA
Input Voltage (Max)	5.25V
Dropout Voltage (Max)	0.44V @ 150mA
Quiescent Current	60 µA
Package / Case	TO-236-3, SC-59, SOT-23-3
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AP7315-185SR7 are identified based on the following critical parameters that determine functional compatibility:

Output voltage: 1.85V fixed
Package type: SOT-23-3 surface mount
Output configuration: Positive fixed regulator
Operating temperature range: -40°C ~ 85°C
Protection features: Over current protection
Compliance: ROHS3 Compliant

Substitutes are grouped into two categories:

Parametric Equivalents (Diodes Incorporated): AP7315-185SA-7 and AP7315-185SR-7 share identical electrical specifications and packaging with the main part. These differ only in product status (active vs. obsolete) and packaging format (tape & reel vs. tube).

Manufacturer Recommended Equivalent (ABLIC Inc.): S-1206B1J-M3T1U provides functional substitution with enhanced specifications, including higher output current capability (250mA vs. 150mA) and lower quiescent current (1.5 µA vs. 60 µA), while maintaining the same output voltage, package type, and operating temperature range.

Parameter Comparison

Parameter	AP7315-185SR7	AP7315-185SA-7	AP7315-185SR-7	S-1206B1J-M3T1U
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	ABLIC Inc.
Output Voltage (Fixed)	1.85V	1.85V	1.85V	1.85V
Output Current	150mA	150mA	150mA	250mA
Input Voltage (Max)	5.25V	5.25V	5.25V	6.5V
Dropout Voltage (Max)	0.44V @ 150mA	0.44V @ 150mA	0.44V @ 150mA	0.5V @ 100mA
Quiescent Current	60 µA	60 µA	60 µA	1.5 µA
PSRR	75dB (1kHz)	75dB (1kHz)	75dB (1kHz)	Not specified
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For designs currently using the obsolete AP7315-185SR7, the following selection path is recommended:

Primary Substitutes: AP7315-185SA-7 and AP7315-185SR-7 are direct parametric equivalents from Diodes Incorporated. Both parts maintain identical electrical performance and are currently in active production status. Selection between these two depends on packaging requirements: AP7315-185SA-7 is supplied in tape & reel format, while AP7315-185SR-7 is also available in tape & reel. Both are ROHS3 compliant and suitable for direct replacement in existing designs without circuit modification.

Alternative Substitute: S-1206B1J-M3T1U from ABLIC Inc. provides functional substitution with enhanced performance characteristics. This part delivers higher output current (250mA vs. 150mA) and significantly lower quiescent current (1.5 µA vs. 60 µA), making it suitable for applications requiring improved efficiency or higher current delivery. The S-1206B1J-M3T1U maintains the same output voltage, package type, and operating temperature range. The higher maximum input voltage (6.5V vs. 5.25V) provides additional design margin. All parts are ROHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can AP7315-185SA-7 and AP7315-185SR-7 be used interchangeably with AP7315-185SR7?

A: Yes. AP7315-185SA-7 and AP7315-185SR-7 are parametric equivalents with identical electrical specifications, output voltage, current ratings, dropout voltage, and operating temperature range. The only differences are product status (active vs. obsolete) and packaging format. Both are direct replacements suitable for PCB assembly without circuit modification.

Q: What are the advantages of using S-1206B1J-M3T1U as a substitute?

A: S-1206B1J-M3T1U offers three key advantages: higher output current capability (250mA vs. 150mA), significantly lower quiescent current (1.5 µA vs. 60 µA for improved power efficiency), and higher maximum input voltage rating (6.5V vs. 5.25V). These enhancements provide design flexibility for applications requiring higher current delivery or lower standby power consumption.

Q: Are all substitute parts available in the same SOT-23-3 package?

A: Yes. All substitute parts—AP7315-185SA-7, AP7315-185SR-7, and S-1206B1J-M3T1U—are packaged in SOT-23-3 (TO-236-3, SC-59). This ensures mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and rated for the same operating temperature range (-40°C ~ 85°C). All include over current protection and are suitable for applications requiring equivalent regulatory compliance.

Q: What is the difference between tape & reel and tube packaging?

A: Tape & reel packaging is optimized for automated assembly processes and high-volume production. Tube packaging is typically used for lower-volume orders or manual assembly. Both formats contain the same electronic component; the difference is in supply and handling format only.

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