AP7311-30SNG-7 Equivalent & Substitute Parts

Part Overview

The AP7311-30SNG-7 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed 3V output applications with 150mA current capacity in SOT-25 surface mount packaging. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support, legacy system maintenance, and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible functionality within the allowed parameter ranges for this power management category.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	150mA
Input Voltage (Max)	6V
Voltage Dropout (Max)	0.3V @ 150mA
Quiescent Current	75 µA
Package Type	SOT-25 (SC-74A, SOT-753)
Operating Temperature Range	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP7311-30SNG-7 is determined by the following critical parameters: fixed 3V output voltage, minimum 150mA output current capability, maximum 6V input voltage rating, SOT-25 package compatibility, and surface mount mounting type. Parts are grouped into two categories based on their relationship to the main part:

Parametric Equivalent: AP7311-30WG-7 maintains identical electrical specifications and differs only in packaging format (Tape & Reel vs. tube) and product status (Active vs. Obsolete). This part is a direct functional replacement.

Manufacturer Recommended Equivalent: XC6221B302MR-G from Torex Semiconductor Ltd provides compatible functionality with enhanced performance characteristics including higher output current (200mA vs. 150mA), lower dropout voltage (0.14V @ 100mA vs. 0.3V @ 150mA), and lower quiescent current (50 µA vs. 75 µA), while maintaining the same 3V output, 6V maximum input, SOT-25 package, and operating temperature range.

Parameter Comparison

Parameter	AP7311-30SNG-7 (Main)	AP7311-30WG-7 (Parametric Equivalent)	XC6221B302MR-G (Recommended Equivalent)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Torex Semiconductor Ltd
Product Status	Obsolete	Active	Active
Output Voltage (Fixed)	3V	3V	3V
Output Current	150mA	150mA	200mA
Input Voltage (Max)	6V	6V	6V
Voltage Dropout (Max)	0.3V @ 150mA	0.3V @ 150mA	0.14V @ 100mA
Quiescent Current	75 µA	75 µA	50 µA
PSRR	65dB (100Hz)	65dB (100Hz)	70dB (1kHz)
Package Type	SOT-25	SOT-25	SOT-25-5
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tube	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

AP7311-30WG-7 is the primary substitute for obsolete AP7311-30SNG-7 applications. Both parts are manufactured by Diodes Incorporated with identical electrical performance and SOT-25 packaging. The primary distinction is product status (Active vs. Obsolete) and packaging format. This part is ROHS3 compliant and maintains full compatibility with existing designs. Availability is significantly higher (18,300 pcs in stock vs. 1,142 pcs).

XC6221B302MR-G from Torex Semiconductor Ltd is a manufacturer-recommended alternative offering enhanced performance specifications. The higher output current rating (200mA) and superior dropout voltage characteristics (0.14V @ 100mA) provide design margin improvements. This part is also ROHS3 compliant and Active status. Selection of this part requires verification that the SOT-25-5 package variant is compatible with existing PCB layouts, as it differs from the standard SOT-25 configuration.

Both substitute parts maintain the critical parameters: 3V fixed output voltage, 6V maximum input voltage, SOT-25 family packaging, -40°C to 85°C operating range, and regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification).

Frequently Asked Questions (FAQ)

Q: Can AP7311-30WG-7 be used as a direct replacement for AP7311-30SNG-7?

A: Yes. AP7311-30WG-7 is a parametric equivalent with identical electrical specifications (3V output, 150mA current, 0.3V dropout, 75 µA quiescent current) and SOT-25 packaging. The only differences are product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. tube). No circuit modifications are required.

Q: What are the advantages of XC6221B302MR-G over the Diodes AP7311 series?

A: XC6221B302MR-G provides higher output current (200mA vs. 150mA), lower dropout voltage (0.14V @ 100mA vs. 0.3V @ 150mA), lower quiescent current (50 µA vs. 75 µA), and higher PSRR (70dB @ 1kHz vs. 65dB @ 100Hz). These improvements reduce power dissipation and improve voltage regulation performance.

Q: Are there package compatibility concerns between SOT-25 and SOT-25-5?

A: Both are SOT-25 family packages with identical pin pitch and footprint dimensions. However, SOT-25-5 is a 5-pin variant while standard SOT-25 is typically 3-pin. Verify PCB layout compatibility before substitution. Pin assignments must be confirmed against device datasheets.

Q: What is the inventory status for substitute parts?

A: AP7311-30WG-7 has 18,300 pcs in stock (Active status). XC6221B302MR-G has 1,425 pcs in stock (Active status). Both exceed the original AP7311-30SNG-7 inventory (1,142 pcs, Obsolete status).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. AP7311-30WG-7 and XC6221B302MR-G are both ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Can XC6221B302MR-G be used in applications requiring exactly 150mA output?

A: Yes. XC6221B302MR-G is rated for 200mA output current, which exceeds the 150mA requirement. The part will operate within specification at 150mA load current with improved thermal and voltage regulation performance compared to the original AP7311-30SNG-7.

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