TPS61031PWPR Equivalent & Substitute Parts

Part Overview

The TPS61031PWPR is a boost switching regulator IC manufactured by Texas Instruments, designed for power management applications requiring step-up voltage conversion. This device delivers a fixed 3.3V output at 3.6A (switch) from input voltages ranging from 1.8V to 5.5V, utilizing a 600kHz switching frequency with integrated synchronous rectification. The part is currently in Last Time Buy status, making identification of active equivalent alternatives essential for ongoing design support and procurement planning.

Substiute Parts

TPS61031PWPR

Texas InstrumentsIn Stock: 4658TPS61031PWPR Datasheet

Current PartRFQ

TLV61070ADBVR

Texas InstrumentsIn Stock: 349831TLV61070ADBVR Datasheet

MFR RecommendedRFQ

TPS61023DRLR

Texas InstrumentsIn Stock: 10316TPS61023DRLR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS61031PWPR is determined by the following critical parameters:

Functional Requirements:

• Boost topology (step-up conversion)
• Positive output configuration
• Synchronous rectification capability

Electrical Compatibility Criteria:

• Input voltage range must encompass or exceed 1.8V to 5.5V
• Output voltage must support 3.3V operation (fixed or adjustable to 3.3V)
• Output current capability must meet or exceed 3.6A

Environmental & Compliance Criteria:

• Operating temperature range: -40°C to 85°C minimum
• RoHS3 compliance
• Surface mount technology

The identified substitute parts maintain boost topology and synchronous rectification but differ in output configuration (adjustable vs. fixed), current rating, package form factor, and operating temperature range. These differences establish distinct application scenarios where substitution is valid.

Parameter Comparison

Engineering Selection Recommendations

TPS61023DRLR is the primary substitute candidate for applications where output current requirements can be met within 3A limits. This part maintains the highest output current capability among active alternatives while offering adjustable output voltage configuration (2.2V to 5.5V), enabling 3.3V operation through external resistor network configuration. The extended operating temperature range (-40°C to 125°C junction temperature) and unlimited MSL rating provide superior environmental performance. The SOT-563 package presents a significantly smaller footprint compared to the 16-PowerTSSOP, requiring PCB layout redesign.

TLV61070ADBVR serves applications with lower current requirements (2.5A maximum) and offers the most compact package option (SOT-23-6). This device provides the lowest minimum input voltage (0.5V) and extended operating temperature range. The adjustable output voltage configuration supports 3.3V operation. MSL rating of 1 (Unlimited) indicates superior moisture tolerance for extended storage and handling.

Both substitute parts carry Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. Selection between substitutes depends on current budget constraints and package form factor compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can TPS61023DRLR directly replace TPS61031PWPR without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (SOT-563 vs. 16-PowerTSSOP). The TPS61023DRLR requires adjustable output voltage configuration through external resistor divider network, whereas TPS61031PWPR provides fixed 3.3V output. PCB redesign and output voltage programming are necessary.

Q: What is the maximum output current limitation when substituting with TLV61070ADBVR?

A: The TLV61070ADBVR is rated for 2.5A maximum output current, compared to 3.6A for the TPS61031PWPR. Applications requiring sustained output currents above 2.5A cannot use this substitute without exceeding device ratings.

Q: Are both substitute parts suitable for the full -40°C to 85°C operating range of the original part?

A: Both substitutes support -40°C to 125°C operating range, exceeding the original specification. However, the TPS61031PWPR specifies ambient temperature (TA) while substitutes specify junction temperature (TJ). Thermal design verification is required to ensure junction temperature remains within acceptable limits under worst-case conditions.

Q: How does the adjustable output voltage configuration affect circuit design?

A: Adjustable output voltage requires external resistor divider network to set the desired 3.3V output. Design calculations must follow manufacturer guidelines in the respective datasheets. Fixed output voltage (TPS61031PWPR) eliminates this design requirement.

Q: What packaging considerations apply when transitioning from 16-PowerTSSOP to SOT-563 or SOT-23-6?

A: SOT-563 and SOT-23-6 packages are significantly smaller than 16-PowerTSSOP, requiring complete PCB layout redesign. Thermal management characteristics differ; smaller packages may require additional thermal considerations for high-current applications. Component placement and trace routing must be re-evaluated.

Q: Do the substitute parts maintain the same switching frequency?

A: No. TPS61031PWPR operates at 600kHz, while TPS61023DRLR operates at 1MHz and TLV61070ADBVR offers selectable 550kHz or 1MHz operation. Higher switching frequencies may reduce output filter component size but increase switching losses. EMI characteristics will differ accordingly.

Q: What is the significance of MSL rating differences?

A: TPS61031PWPR carries MSL 2 (1 Year), requiring reflow within one year of moisture exposure. Substitutes carry MSL 1 (Unlimited), allowing indefinite shelf life without moisture baking. This affects procurement, storage, and handling procedures, particularly for long-term inventory management.