AUIPS1031S Equivalent & Substitute Parts

Part Overview

The AUIPS1031S is an N-Channel power switch/driver manufactured by Infineon Technologies, designed for general-purpose low-side switching applications. This device features a 1:1 input-to-output ratio with on/off control interface and is housed in a D2PAK (TO-263-3) package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	AUIPS1031S
Manufacturer	Infineon Technologies
Category	Power Management (PMIC)
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)
Switch Type	General Purpose
Output Configuration	Low Side
Output Type	N-Channel
Voltage - Load (Max)	36V
Current - Output (Max)	3.3A
Rds On (Typ)	40mOhm
Operating Temperature	-40°C ~ 150°C (TJ)
Fault Protection	Current Limiting (Fixed), Over Temperature
Grade	Automotive
Qualification	AEC-Q100
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the AUIPS1031S is determined by the following critical parameters:

Package Compatibility: TO-263-3 (D2PAK) form factor for direct PCB footprint compatibility
Output Configuration: Low-side N-Channel switching topology
Voltage Rating: Maximum load voltage must meet or exceed 36V
Current Capability: Output current rating must support 3.3A minimum
On-Resistance: Rds On characteristics affect thermal performance and efficiency
Fault Protection: Current limiting and over-temperature protection required
Operating Temperature Range: -40°C to 150°C junction temperature
Interface Type: On/Off control logic compatibility

The BTS117TCBUMA1 qualifies as a direct substitute based on matching package, output configuration, voltage/current envelope, and protection features, despite obsolete status classification for both parts.

Parameter Comparison

Parameter	AUIPS1031S	BTS117TCBUMA1	Notes
Manufacturer	Infineon Technologies	Infineon Technologies	Same manufacturer
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	Direct footprint match
Switch Type	General Purpose	General Purpose	Identical topology
Output Configuration	Low Side	Low Side	Identical configuration
Output Type	N-Channel	N-Channel	Identical type
Voltage - Load (Max)	36V	60V	Substitute rated higher
Current - Output (Max)	3.3A	3.5A	Substitute rated higher
Rds On (Typ)	40mOhm	80mOhm	Original has lower resistance
Operating Temperature	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	Identical range
Fault Protection	Current Limiting (Fixed), Over Temperature	Current Limiting (Fixed), Over Temperature, Over Voltage	Substitute includes additional OVP
Product Status	Obsolete	Obsolete	Both obsolete

Engineering Selection Recommendations

The BTS117TCBUMA1 serves as the manufacturer-recommended substitute for the AUIPS1031S. Both devices are classified as obsolete, requiring careful inventory planning for long-term production support.

Selection considerations based on provided specifications:

Voltage Margin: The BTS117TCBUMA1 provides 60V maximum load voltage versus 36V for the original, offering additional design margin for transient conditions
Current Capability: The 3.5A rating of the substitute exceeds the 3.3A requirement, providing operational headroom
On-Resistance Trade-off: The substitute exhibits 80mOhm typical Rds On compared to 40mOhm for the original, resulting in higher conduction losses and thermal dissipation
Protection Enhancement: The BTS117TCBUMA1 includes over-voltage protection in addition to current limiting and over-temperature protection
Compliance: Both parts maintain AEC-Q100 automotive qualification and REACH compliance status
Packaging: Identical TO-263-3 (D2PAK) package ensures direct PCB compatibility without layout modifications

Thermal analysis is required when substituting due to the doubled on-resistance characteristic, particularly in high-duty-cycle or high-ambient-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the BTS117TCBUMA1 directly replace the AUIPS1031S without PCB modifications?

A: Yes. Both devices use the TO-263-3 (D2PAK) package with identical pinout and footprint. No PCB layout changes are required for mechanical and electrical connection.

Q: What is the impact of the higher Rds On value in the BTS117TCBUMA1?

A: The 80mOhm typical on-resistance of the substitute is double that of the original 40mOhm specification. This increases conduction losses proportionally to the square of the load current. Thermal design verification is necessary to confirm adequate heat dissipation in the target application.

Q: Are both parts suitable for automotive applications?

A: Both the AUIPS1031S and BTS117TCBUMA1 carry automotive grade classification and AEC-Q100 qualification. However, both are obsolete products. Procurement and long-term availability must be confirmed with authorized distributors before design commitment.

Q: What additional protection does the BTS117TCBUMA1 provide?

A: The substitute includes over-voltage protection (OVP) in addition to the current limiting and over-temperature protection present in the original. This provides enhanced fault tolerance in applications subject to voltage transients or supply anomalies.

Q: Is the operating temperature range identical between the two parts?

A: Yes. Both devices operate across the -40°C to 150°C junction temperature range, maintaining identical thermal specifications for design calculations.

Q: What is the moisture sensitivity difference between these parts?

A: The AUIPS1031S has MSL 1 (unlimited shelf life), while the BTS117TCBUMA1 has MSL 3 (168-hour limit after moisture exposure). Storage and handling procedures must account for the more stringent moisture sensitivity of the substitute.

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