TPS51103DRCT Equivalent & Substitute Parts

Part Overview

The TPS51103DRCT is a notebook power system voltage regulator controller IC manufactured by Texas Instruments. This device functions as a single-output power management IC designed for notebook computing applications, operating across an input voltage range of 4.5V to 28V with selectable output voltages of 3.3V or 5V. The part is currently in Last Time Buy status, indicating end-of-life phase. Identifying qualified substitute components is necessary to ensure continued design support and procurement availability for new production runs and legacy system maintenance.

Substiute Parts

TPS51103DRCT

Texas InstrumentsIn Stock: 1240TPS51103DRCT Datasheet

Current PartRFQ

TPS62933DRLR

Texas InstrumentsIn Stock: 3071TPS62933DRLR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS51103DRCT is based on the following critical parameters:

• Input voltage compatibility: Substitute must accept 4.5V minimum to 28V maximum input range
• Output voltage capability: Substitute must support fixed or adjustable output at 3.3V and/or 5V levels
• Single output configuration: Substitute must provide one regulated output
• Surface mount packaging: Substitute must be surface-mountable
• Regulatory compliance: Substitute must maintain ROHS3 compliance and EAR99 classification
• Operating temperature range: Substitute must function across -40°C to 85°C minimum

The TPS62933DRLR qualifies as a substitute based on its input voltage range (3.8V ~ 30V, which encompasses the required 4.5V ~ 28V), adjustable output capability (0.8V ~ 22V, covering both 3.3V and 5V requirements), single output configuration, surface mount design, and equivalent regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The TPS62933DRLR is qualified as a direct substitute for the TPS51103DRCT based on the following engineering criteria:

• Both devices are manufactured by Texas Instruments and carry identical ROHS3 compliance and EAR99 export classification
• Input voltage specifications of the TPS62933DRLR (3.8V ~ 30V) fully encompass the required operating range of the TPS51103DRCT (4.5V ~ 28V)
• Output voltage capability of the TPS62933DRLR (0.8V ~ 22V adjustable) covers both fixed output levels required by the TPS51103DRCT (3.3V and 5V)
• Both devices provide single-output regulation in surface-mount packages
• The TPS62933DRLR operates across an extended temperature range (-40°C ~ 150°C), exceeding the minimum requirement of -40°C ~ 85°C
• The TPS62933DRLR maintains active product status, ensuring long-term availability and design support

Frequently Asked Questions (FAQ)

Q: Can the TPS62933DRLR directly replace the TPS51103DRCT without circuit modifications?

A: The TPS62933DRLR is functionally compatible within the specified input and output voltage parameters. However, circuit design review is required because the TPS62933DRLR is an adjustable buck regulator, whereas the TPS51103DRCT is a fixed-output controller. Output voltage configuration circuitry must be verified for compatibility with your application.

Q: What is the difference between the packaging formats listed?

A: The TPS51103DRCT is supplied in Tape & Reel (TR) format, a standard reel packaging for high-volume production. The TPS62933DRLR is available in Cut Tape (CT) and Digi-Reel® formats. Both are surface-mount compatible; packaging selection depends on your procurement volume and assembly process requirements.

Q: Why does the TPS62933DRLR have a higher maximum operating temperature?

A: The TPS62933DRLR is rated to 150°C junction temperature, compared to 85°C for the TPS51103DRCT. This extended rating reflects the device design and thermal characteristics. Your application must operate within the TPS51103DRCT's original -40°C ~ 85°C specification; the higher rating of the substitute provides additional thermal margin.

Q: Are there any moisture sensitivity differences between these parts?

A: The TPS51103DRCT has MSL 2 (1 Year), while the TPS62933DRLR has MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without baking requirements, providing a reliability advantage for the substitute component.

Q: What compliance certifications apply to both parts?

A: Both the TPS51103DRCT and TPS62933DRLR are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both share the same HTSUS commodity code (8542.39.0001).