RT2853ALGQW Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The RT2853ALGQW is a buck switching regulator IC manufactured by Richtek USA Inc., designed for positive adjustable step-down voltage regulation with 3A output current capability. This PMIC operates across a 4.5V to 18V input range and delivers adjustable output voltage from 0.765V to 7V. The device is housed in a 16-WFQFN exposed pad surface mount package and features synchronous rectification at 650kHz switching frequency.

The RT2853ALGQW is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this regulator topology.

Substiute Parts

RT2853ALGQW

Richtek USA Inc.In Stock: 1009RT2853ALGQW Datasheet

Current PartRFQ

TPS62130RGTR

Texas InstrumentsIn Stock: 25216TPS62130RGTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT2853ALGQW is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive adjustable output
• Output Current Rating: 3A minimum capability
• Input Voltage Range: Minimum 4.5V to maximum 18V compatibility
• Output Voltage Range: Adjustable output spanning 0.765V to 7V
• Package Compatibility: 16-pin WFQFN or equivalent surface mount package with exposed pad
• Synchronous Rectification: Integrated synchronous rectifier required
• Operating Temperature: -40°C to 85°C ambient temperature range
• Regulatory Compliance: ROHS3 compliant and REACH unaffected status

The TPS62130RGTR from Texas Instruments meets these substitution criteria as an active product with compatible electrical specifications and package form factor.

Parameter Comparison

Engineering Selection Recommendations

The TPS62130RGTR qualifies as a functional substitute for the RT2853ALGQW based on matching core topology, output current rating, and regulatory compliance. Both devices are ROHS3 compliant, REACH unaffected, and operate across the -40°C to 85°C temperature range.

Key considerations for substitution:

• Product Status: The TPS62130RGTR is an active product with current manufacturing and distribution support, whereas the RT2853ALGQW is discontinued. This ensures long-term availability and supply chain stability.

• Input Voltage Range: The TPS62130RGTR operates from 3V minimum input, providing broader low-voltage compatibility than the RT2853ALGQW (4.5V minimum). Applications requiring 4.5V to 18V input operation remain compatible.

• Output Voltage Range: The TPS62130RGTR minimum output is 0.9V versus 0.765V for the RT2853ALGQW. Applications requiring output voltages below 0.9V cannot use this substitute. Maximum output voltage is 6V for the TPS62130RGTR versus 7V for the RT2853ALGQW.

• Switching Frequency: The TPS62130RGTR operates at 2.5MHz versus 650kHz for the RT2853ALGQW. Higher switching frequency may reduce external component size but requires verification of EMI characteristics and PCB layout compatibility.

• Package Variant: The TPS62130RGTR uses 16-VFQFN packaging versus 16-WFQFN for the RT2853ALGQW. Both are 3x3mm exposed pad QFN packages with identical pin count and compatible footprints for most applications.

• Moisture Sensitivity: The TPS62130RGTR has MSL 2 (1 Year) versus MSL 3 (168 Hours) for the RT2853ALGQW, indicating superior moisture tolerance during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the TPS62130RGTR directly replace the RT2853ALGQW without PCB modifications?

A: The TPS62130RGTR and RT2853ALGQW share compatible 16-pin QFN 3x3mm footprints with exposed pads. Pin-to-pin compatibility requires verification against the respective datasheets. The higher switching frequency of the TPS62130RGTR (2.5MHz versus 650kHz) may necessitate PCB layout adjustments for optimal performance and EMI control.

Q: What output voltage applications are affected by the different minimum output specifications?

A: The RT2853ALGQW supports adjustable output down to 0.765V, while the TPS62130RGTR minimum is 0.9V. Applications requiring output voltages between 0.765V and 0.9V cannot use the TPS62130RGTR as a substitute. Applications operating at 0.9V or higher are unaffected.

Q: Are there input voltage limitations when substituting?

A: The TPS62130RGTR operates from 3V minimum input, which is lower than the RT2853ALGQW (4.5V minimum). Applications using input voltages between 4.5V and 18V remain fully compatible. Applications requiring operation below 4.5V input voltage benefit from the TPS62130RGTR's extended lower input range.

Q: How does the switching frequency difference impact circuit design?

A: The TPS62130RGTR switching frequency of 2.5MHz is significantly higher than the RT2853ALGQW at 650kHz. Higher switching frequency typically allows smaller external inductors and capacitors but requires careful PCB layout to manage EMI. Inductor and capacitor values must be recalculated based on the TPS62130RGTR datasheet specifications.

Q: What is the significance of the different MSL ratings?

A: The TPS62130RGTR has MSL 2 (1 Year) versus MSL 3 (168 Hours) for the RT2853ALGQW. MSL 2 indicates superior moisture resistance and longer shelf life without baking. This provides operational advantages for inventory management and reduces risk of moisture-induced failures during storage.

Q: Are there output current limitations?

A: Both devices are rated for 3A output current. Applications requiring 3A or less are fully compatible. Applications exceeding 3A output current cannot use either device.

Q: What maximum output voltage applications are affected?

A: The RT2853ALGQW supports adjustable output up to 7V, while the TPS62130RGTR maximum is 6V. Applications requiring output voltages between 6V and 7V cannot use the TPS62130RGTR as a substitute. Applications operating at 6V or lower are unaffected.