XC9221A09AMR-G Equivalent & Substitute Parts

Part Overview

The XC9221A09AMR-G is a buck regulator positive output step-down DC-DC controller IC manufactured by Torex Semiconductor Ltd. This Power Management IC (PMIC) operates as a transistor driver in a single-output, single-phase buck topology configuration. The device is actively produced and widely used in step-down voltage regulation applications requiring input voltage ranges from 2.8V to 16V.

Substitute parts are necessary when the primary part number becomes unavailable, when inventory constraints require alternative sourcing, or when application-specific switching frequency requirements differ from the main part specification. The XC9221A09AMR-G and its equivalents share identical electrical and mechanical parameters within the Torex XC9220 and XC9221 series, differentiated primarily by switching frequency and control feature implementations.

Key Parameters

Parameter	Value
Manufacturer	Torex Semiconductor Ltd
Category	Power Management (PMIC)
Function	Step-Down Buck Regulator Controller
Output Type	Transistor Driver
Topology	Buck
Number of Outputs	1
Output Phases	1
Voltage Supply Range (Vcc/Vdd)	2.8V ~ 16V
Switching Frequency	1MHz
Duty Cycle (Max)	100%
Synchronous Rectifier	No
Clock Sync	No
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-25-5
Packaging Format	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS Code	8542.39.0001

Substitute Part Grouping Explanation

Substitution eligibility for the XC9221A09AMR-G is determined by strict adherence to the following core parameters:

Critical Matching Parameters (Must Be Identical):

Voltage Supply Range: 2.8V ~ 16V
Topology: Buck (step-down)
Output Configuration: Positive
Number of Outputs: 1
Output Phases: 1
Duty Cycle (Max): 100%
Output Type: Transistor Driver
Package / Case: SC-74A, SOT-753
Supplier Device Package: SOT-25-5
Mounting Type: Surface Mount
Operating Temperature Range: -40°C ~ 85°C (TA)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

Variable Parameters (Allowed to Differ):

Switching Frequency: 300kHz, 500kHz, or 1MHz
Control Features: May include Enable and Soft Start functions
Base Product Number: XC9220 or XC9221 series

All substitute parts listed are manufactured by Torex Semiconductor Ltd and maintain identical electrical performance within the specified input voltage and temperature ranges. Switching frequency variations allow selection based on application-specific noise and efficiency requirements. Parts from both the XC9220 and XC9221 series are interchangeable when all critical parameters match.

Parameter Comparison

Part Number	Switching Frequency	Control Features	Inventory (Pcs)	Series	Product Status
XC9221A09AMR-G	1MHz	—	809	XC9221	Active
XC9220A093MR-G	300kHz	Enable, Soft Start	6200	XC9220	Active
XC9220A09AMR-G	1MHz	Enable, Soft Start	3200	XC9220	Active
XC9220B095MR-G	500kHz	Enable, Soft Start	1107	XC9220	Active
XC9220C095MR-G	500kHz	Enable, Soft Start	952	XC9220	Active
XC9220C09AMR-G	1MHz	Enable, Soft Start	1152	XC9220	Active
XC9220D093MR-G	300kHz	Enable, Soft Start	757	XC9220	Active
XC9220D095MR-G	500kHz	Enable, Soft Start	815	XC9220	Active
XC9221A093MR-G	300kHz	Enable, Soft Start	961	XC9221	Active
XC9221A095MR-G	500kHz	—	19049	XC9221	Active
XC9221C093MR-G	300kHz	Enable, Soft Start	20200	XC9221	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status with Torex Semiconductor Ltd and are ROHS3 compliant with REACH Unaffected designation. Selection among equivalent parts should be based on the following criteria:

Switching Frequency Selection:

300kHz variants (XC9220A093MR-G, XC9220D093MR-G, XC9221A093MR-G, XC9221C093MR-G) are suitable for applications where lower switching frequency reduces electromagnetic interference and power dissipation.
500kHz variants (XC9220B095MR-G, XC9220C095MR-G, XC9220D095MR-G, XC9221A095MR-G) provide intermediate frequency operation for balanced efficiency and component size.
1MHz variants (XC9220A09AMR-G, XC9220C09AMR-G, XC9221A09AMR-G) enable higher frequency operation for reduced inductor and capacitor sizes in space-constrained applications.

Control Feature Availability: Parts designated with Enable and Soft Start control features provide additional circuit management capabilities. The XC9221A09AMR-G and XC9221A095MR-G lack these features; substitution with XC9220 or XC9221 series parts including Enable and Soft Start may require circuit design modifications.

Inventory Availability: XC9221A095MR-G (19,049 pcs) and XC9221C093MR-G (20,200 pcs) offer the highest inventory levels for immediate procurement. XC9220A093MR-G (6,200 pcs) and XC9220A09AMR-G (3,200 pcs) provide substantial availability for 1MHz and 300kHz applications respectively.

Compliance and Certification: All parts are manufactured under identical compliance frameworks (ROHS3, REACH Unaffected, EAR99 ECCN, MSL 1). No additional qualification is required when substituting between listed parts.

Frequently Asked Questions (FAQ)

Q: Can I substitute XC9221A09AMR-G with XC9220A09AMR-G?

A: Yes. Both parts operate at 1MHz switching frequency, share identical voltage supply range (2.8V ~ 16V), topology (buck), package (SOT-25-5), and temperature rating (-40°C ~ 85°C). The primary difference is that XC9220A09AMR-G includes Enable and Soft Start control features, which may require circuit design evaluation if these features are not utilized in the original application.

Q: What is the difference between 300kHz, 500kHz, and 1MHz variants?

A: Switching frequency determines the operational speed of the buck converter. Higher frequencies (1MHz) allow smaller passive components (inductors and capacitors) but increase switching losses. Lower frequencies (300kHz) reduce switching losses and electromagnetic interference but require larger passive components. Selection depends on application requirements for size, efficiency, and noise performance.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use SC-74A / SOT-753 package format with SOT-25-5 supplier device package designation. All are surface mount components suitable for identical PCB layouts.

Q: Do I need to re-qualify my circuit if I switch to a substitute part?

A: Substitution between parts with identical critical parameters (voltage range, topology, output configuration, temperature range, package) does not require re-qualification. However, if substituting to a part with different control features (Enable, Soft Start) or switching frequency, circuit behavior may change and should be evaluated against application requirements.

Q: Which substitute part has the best availability?

A: XC9221A095MR-G offers the highest inventory at 19,049 pieces, followed by XC9221C093MR-G at 20,200 pieces. Both are suitable for immediate procurement.

Q: Are all parts RoHS and REACH compliant?

A: Yes. All listed parts are ROHS3 compliant with REACH Unaffected status, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: Can I use a 300kHz part as a direct replacement for a 1MHz part?

A: Direct replacement is possible from an electrical standpoint, as both operate within the same voltage and temperature specifications. However, the lower switching frequency will result in different inductor and capacitor sizing requirements, potentially affecting circuit performance, efficiency, and component footprint. Application-specific evaluation is necessary.

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