TC1220ECH718 Equivalent & Substitute Parts

Part Overview

The TC1220ECH718 is a charge pump switching regulator IC manufactured by Microchip Technology, designed for power management applications requiring positive or negative fixed output voltage generation. This component operates as a ratiometric regulator with a single output delivering 25mA maximum current in a compact SOT-23-6 surface mount package.

The TC1220ECH718 has reached obsolete product status. Identifying qualified substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this part.

Substiute Parts

TC1220ECH718

Microchip TechnologyIn Stock: 4104TC1220ECH718 Datasheet

Current PartRFQ

LM2664M6/NOPB

Texas InstrumentsIn Stock: 35494LM2664M6/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC1220ECH718 is determined by the following critical parameters:

• Topology: Charge pump switching regulator architecture
• Output Configuration: Positive or negative fixed voltage capability
• Package / Case: SOT-23-6 surface mount form factor
• Operating Temperature Range: -40°C ~ 85°C minimum requirement
• Output Current Capability: Minimum 25mA to support existing circuit requirements
• Input Voltage Range: Compatibility with 2.5V to 5.5V input specifications
• RoHS Compliance: ROHS3 compliance for regulatory alignment

The LM2664M6/NOPB from Texas Instruments meets all substitution criteria. This part maintains identical topology, output configuration, package form factor, and operating temperature range. The substitute part exceeds the original output current specification (40mA vs. 25mA) and extends the minimum input voltage range (1.8V vs. 2.5V), providing enhanced capability within the same electrical and mechanical envelope.

Parameter Comparison

Engineering Selection Recommendations

The LM2664M6/NOPB qualifies as a direct substitute for the TC1220ECH718 based on the following engineering criteria:

Regulatory Compliance: Both components maintain ROHS3 compliance and identical moisture sensitivity classification (MSL 1), ensuring no additional handling or storage requirements during transition.

Product Status: The LM2664M6/NOPB carries active product status with confirmed inventory availability (35,400 units), providing supply chain continuity and long-term component availability compared to the obsolete TC1220ECH718.

Electrical Compatibility: The substitute part operates within the same input voltage maximum (5.5V) and output voltage configuration (-Vin, 2Vin). The extended minimum input voltage range (1.8V vs. 2.5V) and increased output current capability (40mA vs. 25mA) represent performance enhancements that do not compromise existing circuit designs.

Package and Thermal Characteristics: Identical SOT-23-6 surface mount packaging and operating temperature range (-40°C ~ 85°C) ensure direct PCB compatibility without layout modifications or thermal management changes.

Frequently Asked Questions (FAQ)

Q: Can the LM2664M6/NOPB directly replace the TC1220ECH718 without PCB modifications?

A: Yes. Both components use identical SOT-23-6 surface mount packaging with the same pinout configuration. No PCB layout changes are required for physical substitution.

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

A: The LM2664M6/NOPB provides higher output current (40mA vs. 25mA), lower minimum input voltage (1.8V vs. 2.5V), and higher switching frequency (80kHz vs. 35kHz). The substitute maintains identical output voltage configuration, operating temperature range, and regulatory compliance.

Q: Is the higher switching frequency of the LM2664M6/NOPB a concern for existing designs?

A: The increased switching frequency (80kHz vs. 35kHz) is a characteristic of the substitute part's design. This parameter is determined by the internal oscillator architecture and does not affect functional compatibility when the part is used within its specified electrical operating range.

Q: Are there any thermal or power dissipation differences?

A: Both components operate within the same temperature range (-40°C ~ 85°C). The higher output current capability of the LM2664M6/NOPB may result in different power dissipation characteristics depending on load conditions, but this represents an enhancement rather than a limitation.

Q: What is the supply chain status for each part?

A: The TC1220ECH718 is obsolete with no active manufacturing. The LM2664M6/NOPB is an active product with substantial inventory availability (35,400 units), ensuring reliable procurement for current and future production requirements.

Q: Do both parts require the same external component values?

A: Both parts use identical charge pump topology and output voltage configuration. External component selection should be based on the specific output voltage requirement (-Vin or 2Vin) and load current, which remain consistent between the two parts.