XC6221A08AMR-G Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The XC6221A08AMR-G is a linear voltage regulator IC manufactured by Torex Semiconductor Ltd, designed for positive fixed output applications. This device delivers 200mA output current at a fixed 0.85V output voltage in a compact SOT-25-5 surface mount package. The regulator features integrated over-current and short-circuit protection, making it suitable for low-power applications requiring stable voltage regulation.

The XC6221A08AMR-G maintains active product status with 639 units in current inventory. Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and regulatory compliance standards.

Substiute Parts

XC6221A08AMR-G

Torex Semiconductor LtdIn Stock: 721XC6221A08AMR-G Datasheet

Current PartRFQ

AP7335-08WG-7

Diodes IncorporatedIn Stock: 3412AP7335-08WG-7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the XC6221A08AMR-G is determined by the following critical parameters:

Output Voltage Compatibility: The substitute part must provide a fixed output voltage within the application tolerance. The AP7335-08WG-7 provides 0.8V output, which represents a 0.05V variance from the primary part's 0.85V specification.

Output Current Capacity: The substitute must meet or exceed the required 200mA output current. The AP7335-08WG-7 delivers 300mA, providing additional current headroom.

Package Compatibility: Both parts utilize SOT-25-5 (SC-74A) surface mount packaging, ensuring mechanical and electrical pin compatibility.

Input Voltage Range: Both parts accept maximum input voltage of 6V, maintaining consistent power supply requirements.

Operating Temperature Range: Both parts operate across -40°C to 85°C, ensuring thermal compatibility in equivalent applications.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN/HTSUS classifications.

Protection Features: Both parts include over-current protection. The AP7335-08WG-7 includes over-temperature protection in addition to over-current protection.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The XC6221A08AMR-G remains the preferred choice for applications requiring the specified 0.85V output voltage with 200mA current capacity. This part maintains active product status with established inventory availability (639 units in stock).

Substitute Part Selection: The AP7335-08WG-7 serves as a functional equivalent when the following conditions are met:

1. Application tolerance permits 0.8V output voltage instead of 0.85V
2. Higher output current capacity (300mA) does not create design conflicts
3. Lower dropout voltage (0.3V @ 300mA) is acceptable or beneficial
4. Increased quiescent current (80µA vs. 50µA) does not violate power budget constraints
5. Slightly lower PSRR (65dB vs. 70dB) meets noise performance requirements

Both parts maintain identical regulatory compliance (ROHS3, REACH unaffected, EAR99 ECCN classification) and operate across the same temperature range (-40°C to 85°C). The AP7335-08WG-7 provides higher inventory availability (3400 units in stock) and includes integrated over-temperature protection.

Frequently Asked Questions (FAQ)

Q: Can the AP7335-08WG-7 directly replace the XC6221A08AMR-G in all applications?

A: Direct replacement requires verification that the application tolerates a 0.8V output voltage instead of 0.85V. The 0.05V variance may be acceptable in many applications but must be confirmed against circuit requirements. Pin compatibility is confirmed (SOT-25-5 package), but electrical performance differences must be evaluated.

Q: What is the significance of the voltage dropout difference between these parts?

A: The XC6221A08AMR-G exhibits 0.85V dropout at 100mA, while the AP7335-08WG-7 exhibits 0.3V dropout at 300mA. Lower dropout voltage in the substitute part allows operation with lower input supply voltages or provides better efficiency at higher load currents. This difference is advantageous in battery-powered or low-supply-voltage applications.

Q: How does the quiescent current difference affect circuit design?

A: The AP7335-08WG-7 draws 80µA quiescent current compared to 50µA for the XC6221A08AMR-G, representing a 30µA increase. In applications with strict standby power budgets, this difference may be significant. In typical active-mode applications, this variance is generally negligible.

Q: Are both parts suitable for the same PCB layout and thermal management?

A: Yes. Both parts use identical SOT-25-5 (SC-74A) surface mount packaging, ensuring mechanical compatibility and identical PCB footprints. Thermal management requirements are equivalent for both devices in this package type.

Q: What is the practical significance of the PSRR difference?

A: The XC6221A08AMR-G provides 70dB PSRR at 1kHz, while the AP7335-08WG-7 provides 65dB PSRR at 1kHz. This 5dB difference represents approximately 56% better noise rejection in the primary part. Applications requiring superior power supply rejection ratio should retain the XC6221A08AMR-G.

Q: Do both parts require identical external component configurations?

A: Both parts feature integrated enable control and protection features (over-current and short-circuit). The AP7335-08WG-7 includes additional over-temperature protection. External capacitor and resistor requirements should be verified against individual datasheets, as component values may differ based on specific electrical characteristics.

Q: What inventory considerations apply to these parts?

A: The XC6221A08AMR-G maintains 639 units in current stock. The AP7335-08WG-7 provides significantly higher availability with 3400 units in stock. For applications where supply continuity is critical, the substitute part offers superior long-term availability.