TPS78401DBVR Equivalent & Substitute Parts

Part Overview

The TPS78401DBVR is an active linear voltage regulator IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This device functions as a positive adjustable output regulator with 300mA current capacity in a surface-mount SOT-23-5 package. The TPS78401DBVR is currently in active product status with 4872 units in stock inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across different manufacturer offerings. Alternative components may be required due to supply chain constraints, inventory availability, or design flexibility requirements while maintaining functional equivalence within specified parameter ranges.

Substiute Parts

TPS78401DBVR

Texas InstrumentsIn Stock: 4921TPS78401DBVR Datasheet

Current PartRFQ

RT9179GB

Richtek USA Inc.In Stock: 105306RT9179GB Datasheet

SimilarRFQ

RT9193-15GB

Richtek USA Inc.In Stock: 103462RT9193-15GB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS78401DBVR is determined by the following critical parameters:

Primary Substitution Criteria:

• Package compatibility: SOT-23-5 (SC-74A) surface-mount package
• Output configuration: Positive polarity
• Current capacity: 300mA minimum output current
• Operating temperature range: -40°C to 125°C minimum
• Product status: Active
• Regulatory compliance: ROHS3 Compliant

Secondary Compatibility Factors:

• Input voltage maximum: 5.5V or higher
• Output voltage range overlap with application requirements
• Dropout voltage performance at rated current
• Control features: Enable function presence
• Protection features: Over-current and over-temperature protection

The TPS78401DBVR is an adjustable output regulator. Substitute parts may include both adjustable and fixed-output variants, provided the fixed output voltage falls within the application's required range and all primary criteria are satisfied.

Parameter Comparison

Engineering Selection Recommendations

RT9179GB (Richtek USA Inc.): This part qualifies as a direct functional substitute for the TPS78401DBVR. Both devices are adjustable-output linear regulators in SOT-23-5 packages with 300mA output current and identical dropout voltage specifications. The RT9179GB operates within the same temperature range and maintains active product status with ROHS3 compliance. The RT9179GB input voltage maximum is 5.5V compared to 6V for the TPS78401DBVR; applications requiring input voltages between 5.5V and 6V require verification of circuit design margins. The RT9179GB quiescent current is 150µA versus 35µA for the TPS78401DBVR; power-sensitive applications should account for this difference. The RT9179GB output voltage range is 1.175V to 4.5V, which is narrower than the TPS78401DBVR range of 1.2V to 5.5V.

RT9193-15GB (Richtek USA Inc.): This part is a fixed-output variant with 1.5V output. Substitution is applicable only for applications requiring a 1.5V regulated output. The RT9193-15GB maintains SOT-23-5 package compatibility, 300mA output current, and active product status with ROHS3 compliance. The device operates within the same temperature range as the TPS78401DBVR. The RT9193-15GB quiescent current is 130µA. This part is not suitable for applications requiring adjustable output voltage or fixed outputs other than 1.5V.

All substitute parts maintain active product status, ROHS3 compliance, and equivalent mechanical packaging. Selection should be based on specific output voltage requirements and input voltage constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can the RT9179GB replace the TPS78401DBVR in all applications?

A: The RT9179GB is functionally equivalent for applications where the input voltage does not exceed 5.5V and the required output voltage range falls within 1.175V to 4.5V. The TPS78401DBVR supports input voltages up to 6V and output voltages up to 5.5V. Applications operating at the upper limits of these ranges require design verification.

Q: What is the difference between the TPS78401DBVR and RT9193-15GB?

A: The TPS78401DBVR is an adjustable-output regulator with output voltage range of 1.2V to 5.5V. The RT9193-15GB is a fixed-output regulator with 1.5V output only. The RT9193-15GB is suitable only for applications requiring exactly 1.5V output. For adjustable or different fixed voltages, the TPS78401DBVR or RT9179GB are appropriate selections.

Q: Are all substitute parts in the same package?

A: Yes. The TPS78401DBVR, RT9179GB, and RT9193-15GB all use the SOT-23-5 (SC-74A) surface-mount package. Pin-to-pin compatibility is maintained across all three parts.

Q: What is the quiescent current difference between the main part and substitutes?

A: The TPS78401DBVR has a quiescent current of 35µA. The RT9179GB has 150µA, and the RT9193-15GB has 130µA. For battery-powered or low-power applications where quiescent current is critical, the TPS78401DBVR offers superior performance. The substitute parts consume approximately 3.7 to 4.3 times more quiescent current.

Q: Do all parts have the same protection features?

A: The TPS78401DBVR includes over-current, over-temperature, and UVLO (under-voltage lockout) protection. The RT9179GB and RT9193-15GB include over-current and over-temperature protection but do not specify UVLO protection. Applications requiring UVLO functionality should retain the TPS78401DBVR.

Q: Are there any compliance or regulatory differences?

A: All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. No regulatory or compliance differences exist between the parts.

Q: What is the moisture sensitivity level (MSL) difference?

A: The TPS78401DBVR has MSL 2 (1 Year). The RT9179GB and RT9193-15GB have MSL 3 (168 Hours). This affects storage and handling requirements; parts with higher MSL ratings require more stringent moisture control during storage and assembly.