TPS60251RTWT LED Driver IC Equivalent & Substitute Parts

Part Overview

The TPS60251RTWT is a 7-output LED driver IC manufactured by Texas Instruments, featuring an integrated DC-DC regulator with switched capacitor (charge pump) topology. This component is designed for backlight applications requiring I2C-controlled dimming functionality. The device operates from a 3V to 6V supply and delivers up to 230mA per output channel at 6.5V output voltage.

The TPS60251RTWT is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

TPS60251RTWT

Texas InstrumentsIn Stock: 1169TPS60251RTWT Datasheet

Current PartRFQ

ADP8860ACBZ-R7

Analog Devices Inc.In Stock: 43559ADP8860ACBZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS60251RTWT is determined by the following critical parameters:

• Topology: Switched Capacitor (Charge Pump) DC-DC regulator architecture
• Number of Outputs: 7 independent LED driver outputs
• Supply Voltage Compatibility: Input voltage range must accommodate 3V to 6V operation
• Output Voltage Range: Must support or exceed 6.5V output capability
• Current Delivery: Minimum 230mA per channel requirement
• Control Interface: I2C dimming control protocol
• Application: LED backlight driver functionality
• Compliance: RoHS3 and REACH compliance status
• Package Type: Surface mount configuration

The ADP8860ACBZ-R7 from Analog Devices Inc. qualifies as a manufacturer-recommended substitute based on matching topology, output count, control interface, and application profile, despite differences in specific electrical ratings and package form factor.

Parameter Comparison

Engineering Selection Recommendations

The ADP8860ACBZ-R7 is designated as the manufacturer-recommended substitute for the obsolete TPS60251RTWT. Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection.

Key considerations for substitution:

Electrical Compatibility: The ADP8860ACBZ-R7 operates within a lower supply voltage range (2.5V to 5.5V) compared to the TPS60251RTWT (3V to 6V). Applications operating at supply voltages above 5.5V require design verification. The output voltage range of the ADP8860ACBZ-R7 (4.3V to 5.5V) is lower than the TPS60251RTWT (6.5V), necessitating circuit redesign for applications requiring higher output voltage.

Current Delivery: The ADP8860ACBZ-R7 provides 30mA or 60mA per channel, significantly lower than the TPS60251RTWT's 230mA per channel. Applications requiring the full 230mA output current cannot use this substitute without external current amplification or parallel channel configuration.

Product Status: The ADP8860ACBZ-R7 maintains active product status with unlimited moisture sensitivity level (MSL 1), providing superior long-term availability and storage flexibility compared to the obsolete TPS60251RTWT.

Package Transition: The substitute requires transition from 24-WQFN to 20-WLCSP package, necessitating PCB layout redesign and assembly process validation.

Frequently Asked Questions (FAQ)

Q: Can the ADP8860ACBZ-R7 directly replace the TPS60251RTWT without circuit modifications?

A: No. While both devices share the same topology, output count, and I2C control interface, critical electrical differences require circuit redesign. The lower output voltage (4.3V to 5.5V versus 6.5V) and reduced current per channel (30mA/60mA versus 230mA) necessitate application-specific evaluation and potential external component additions.

Q: What are the key electrical differences between these parts?

A: The primary differences are supply voltage range (TPS60251RTWT: 3V to 6V; ADP8860ACBZ-R7: 2.5V to 5.5V), output voltage (TPS60251RTWT: 6.5V; ADP8860ACBZ-R7: 4.3V to 5.5V), and current per channel (TPS60251RTWT: 230mA; ADP8860ACBZ-R7: 30mA or 60mA). Switching frequency also differs (750kHz versus 1MHz).

Q: Does the package change affect PCB design?

A: Yes. The transition from 24-WQFN (4x4mm) to 20-WLCSP (1.96x2.36mm) requires complete PCB layout redesign, including trace routing, via placement, and thermal management considerations. Assembly process parameters must be validated for the new package type.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the TPS60251RTWT and ADP8860ACBZ-R7 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.

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

A: The TPS60251RTWT has MSL 2 (1 Year storage limit), while the ADP8860ACBZ-R7 has MSL 1 (unlimited storage). The substitute offers superior moisture handling and extended shelf life without reflow requirements.

Q: Can multiple ADP8860ACBZ-R7 channels be paralleled to achieve 230mA output?

A: Channel paralleling is not recommended without explicit manufacturer guidance. Parallel operation introduces current sharing complexity and potential reliability issues. Alternative solutions include external current amplification stages or selecting a different LED driver IC with higher current capability.