XC6604A181ER-G Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The XC6604A181ER-G is an active linear voltage regulator IC manufactured by Torex Semiconductor Ltd, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 1A at 1.8V with integrated protection features including over-current, over-temperature, and under-voltage lockout (UVLO) functionality. The device is housed in a 6-USPC surface mount package with exposed pad design.

The part maintains Active product status with 1063 units in current inventory stock. Equivalent substitute parts may be required due to supply chain constraints, regional availability, or procurement optimization while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer	Torex Semiconductor Ltd
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	1A
Input Voltage (Max)	3V
Voltage Dropout (Max)	0.213V @ 1A
Quiescent Current	143 µA
PSRR	75dB (1kHz)
Package Type	6-UFDFN Exposed Pad (6-USPC 1.8x2)
Operating Temperature Range	-40°C ~ 85°C (TA)
Protection Features	Over Current, Over Temperature, UVLO
Control Features	Enable, Soft Start
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the XC6604A181ER-G is determined by strict parametric matching across all critical electrical and mechanical specifications. The following parameters establish the substitution criteria:

Electrical Parameters (Must Match Exactly): Output voltage fixed at 1.8V, output current rating of 1A, maximum input voltage of 3V, maximum dropout voltage of 0.213V @ 1A, quiescent current of 143 µA, and PSRR of 75dB at 1kHz.

Functional Parameters (Must Match Exactly): Positive output configuration, single regulator output, Enable and Soft Start control features, and protection against over-current, over-temperature, and under-voltage lockout conditions.

Mechanical Parameters (Must Match Exactly): Surface mount mounting type, 6-UFDFN package with exposed pad, supplier device package designation 6-USPC (1.8x2).

Compliance Parameters (Must Match Exactly): ROHS3 compliance, MSL rating of 1 (Unlimited), REACH Unaffected status.

The XC6603A181ER-G qualifies as a parametric equivalent substitute based on complete alignment across all specified parameters.

Parameter Comparison

Parameter	XC6604A181ER-G	XC6603A181ER-G	Match Status
Manufacturer	Torex Semiconductor Ltd	Torex Semiconductor Ltd	Identical
Output Voltage (Fixed)	1.8V	1.8V	Identical
Output Current	1A	1A	Identical
Input Voltage (Max)	3V	3V	Identical
Voltage Dropout (Max)	0.213V @ 1A	0.213V @ 1A	Identical
Quiescent Current	143 µA	143 µA	Identical
PSRR	75dB (1kHz)	75dB (1kHz)	Identical
Package Type	6-UFDFN Exposed Pad	6-UFDFN Exposed Pad	Identical
Supplier Device Package	6-USPC (1.8x2)	6-USPC (1.8x2)	Identical
Operating Temperature Range	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	Identical
Control Features	Enable, Soft Start	Enable, Soft Start	Identical
Protection Features	Over Current, Over Temperature, UVLO	Over Current, Over Temperature, UVLO	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both the XC6604A181ER-G and XC6603A181ER-G maintain Active product status from Torex Semiconductor Ltd, confirming ongoing manufacturer support and availability. Both components are ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements for industrial and commercial applications.

Selection between these parts should be based on inventory availability and procurement lead times. The XC6604A181ER-G currently maintains 1063 units in stock, while the XC6603A181ER-G maintains 854 units. Both parts are supplied in Tape & Reel packaging suitable for automated assembly processes.

No electrical performance differentiation exists between these components. PCB layout, thermal management, and circuit design considerations remain identical for both part numbers.

Frequently Asked Questions (FAQ)

Q: Can XC6603A181ER-G be used as a direct replacement for XC6604A181ER-G?

A: Yes. The XC6603A181ER-G is a parametric equivalent substitute. All electrical specifications, output voltage, current rating, dropout voltage, quiescent current, PSRR, protection features, control features, package type, and compliance certifications are identical.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the identical 6-UFDFN package with exposed pad in 6-USPC (1.8x2) form factor. PCB footprints, solder pad layouts, and thermal pad dimensions are identical.

Q: What is the difference between the XC6604 and XC6603 base product numbers?

A: The base product numbers differ, but the specified variants (XC6604A181ER-G and XC6603A181ER-G) deliver identical electrical and mechanical performance. Substitution is valid based on complete parametric matching.

Q: Do both parts support the same operating temperature range?

A: Yes. Both parts operate across -40°C to 85°C (TA), suitable for industrial and commercial temperature environments.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both XC6604A181ER-G and XC6603A181ER-G are ROHS3 compliant and REACH Unaffected, meeting current environmental regulations.

Q: What is the MSL rating for these components?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably in production?

A: Yes. Identical electrical performance, package specifications, and compliance certifications support direct interchangeability in manufacturing processes without circuit design modifications.

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