TC110333ECTTR Boost Regulator Controller - Equivalent & Substitute Parts

Part Overview

The TC110333ECTTR is a boost regulator positive output step-up DC-DC controller IC manufactured by Microchip Technology. This surface-mount device operates as a transistor driver for step-up topology applications with a single output phase. The part is currently in active production status with 1096 units available in stock.

Finding equivalent and substitute parts becomes necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative sourcing options. The TC110333ECTTR has one identified manufacturer-recommended substitute: the S-8356M33MC-MEST2G from ABLIC Inc.

Substiute Parts

TC110333ECTTR

Microchip TechnologyIn Stock: 1195TC110333ECTTR Datasheet

Current PartRFQ

S-8356M33MC-MEST2G

ABLIC Inc.In Stock: 9856S-8356M33MC-MEST2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC110333ECTTR is determined by strict alignment of the following critical parameters:

• Topology: Boost (step-up) configuration
• Output Type: Transistor driver
• Output Configuration: Positive output
• Number of Outputs: Single output
• Package: SOT-23-5 form factor
• Mounting: Surface mount
• Operating Temperature: -40°C ~ 85°C minimum range
• Supply Voltage Range: Minimum 2V to maximum 10V
• Switching Frequency: Operation within 100kHz to 300kHz range
• RoHS Compliance: ROHS3 Compliant

The S-8356M33MC-MEST2G from ABLIC Inc. meets all critical substitution criteria. However, this part carries a "Not For New Designs" product status designation, indicating it is suitable only for replacement and legacy system applications.

Parameter Comparison

Engineering Selection Recommendations

The S-8356M33MC-MEST2G qualifies as a direct substitute for the TC110333ECTTR based on matching core topology, output configuration, package form factor, and compliance certifications. Both devices are ROHS3 compliant and carry identical moisture sensitivity ratings.

Selection between these parts should account for the following factors:

The TC110333ECTTR remains the preferred choice for new designs due to its active product status. This part offers a wider switching frequency range (100kHz to 300kHz) and includes soft start control functionality, providing greater design flexibility for applications requiring frequency tuning or inrush current management.

The S-8356M33MC-MEST2G is designated "Not For New Designs" and is appropriate only for replacement applications in existing systems. This substitute operates at a fixed 300kHz switching frequency and lacks soft start capability. The substitute also exhibits a lower maximum duty cycle (85% versus 92%), which may impact performance in applications requiring extended on-time operation. However, the substitute provides a wider input voltage range (0.9V to 10V), extending operation to lower supply voltages than the primary part.

Both parts maintain identical operating temperature ranges and package specifications, ensuring mechanical and thermal compatibility in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the S-8356M33MC-MEST2G be used as a direct replacement in existing TC110333ECTTR designs?

A: The S-8356M33MC-MEST2G is mechanically and electrically compatible for replacement applications. However, design verification is necessary to confirm that the fixed 300kHz switching frequency and 85% maximum duty cycle meet the original circuit requirements. Applications designed around the TC110333ECTTR's soft start feature or variable frequency operation may require circuit modifications.

Q: What is the significance of the "Not For New Designs" status on the S-8356M33MC-MEST2G?

A: This designation indicates the part is in mature or declining production phase and is intended for legacy system support and replacement applications only. New product designs should utilize the TC110333ECTTR or other actively supported alternatives.

Q: Are both parts pin-compatible?

A: Both the TC110333ECTTR and S-8356M33MC-MEST2G use the SOT-23-5 package (SC-74A, SOT-753), ensuring identical pin count and footprint compatibility. PCB layout modifications are not required for mechanical substitution.

Q: How do the switching frequency differences affect circuit performance?

A: The TC110333ECTTR supports a tunable range from 100kHz to 300kHz, allowing optimization for specific application requirements. The S-8356M33MC-MEST2G operates at a fixed 300kHz frequency. Applications requiring lower switching frequencies or frequency adjustment must use the TC110333ECTTR.

Q: What impact does the lower duty cycle limit of the S-8356M33MC-MEST2G have?

A: The 85% maximum duty cycle on the substitute versus 92% on the primary part reduces the maximum on-time per switching cycle. This affects the maximum voltage boost ratio achievable. Applications requiring high step-up ratios or extended on-time operation should verify compatibility before substitution.

Q: Are there compliance or certification differences between these parts?

A: Both parts carry identical ROHS3 compliance and moisture sensitivity ratings (MSL 1, Unlimited). No compliance-related barriers exist for substitution in regulated applications.