LTC3311SEV#PBF Equivalent & Substitute Parts

Part Overview

The LTC3311SEV#PBF is an active buck switching regulator IC manufactured by Analog Devices Inc., classified as a Power Management PMIC. This device functions as a step-down converter with positive adjustable output, delivering 12.5A output current across a single output channel. The part operates within an input voltage range of 2.25V to 5.5V and provides adjustable output voltage from 0.5V to 5.5V at a 2MHz switching frequency. The LTC3311SEV#PBF is part of the Silent Switcher®2 series and maintains active product status with full RoHS3 compliance.

Equivalent and substitute parts are identified to address component availability, extended operating temperature requirements, or design optimization needs while maintaining electrical and mechanical compatibility within the specified parameter constraints.

Substiute Parts

LTC3311SEV#PBF

Analog Devices Inc.In Stock: 1114LTC3311SEV#PBF Datasheet

Current PartRFQ

LTC3311HV#PBF

Analog Devices Inc.In Stock: 1351LTC3311HV#PBF Datasheet

DirectRFQ

LTC3311JV#PBF

Analog Devices Inc.In Stock: 1422LTC3311JV#PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTC3311SEV#PBF are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is based on the following criteria:

Electrical Equivalence Requirements:

• Identical buck topology and step-down function
• Matching input voltage range: 2.25V to 5.5V
• Matching output voltage range: 0.5V to 5.5V
• Identical output current rating: 12.5A
• Identical switching frequency: 2MHz
• Synchronous rectifier present in all variants
• Single positive adjustable output configuration

Mechanical Equivalence Requirements:

• Identical package type: 18-TFQFN Exposed Pad
• Identical supplier device package: 18-LQFN (3x3)
• Surface mount mounting type
• Identical MSL rating: 3 (168 Hours)

Compliance Requirements:

• ROHS3 compliance maintained across all variants
• REACH unaffected status maintained
• Active product status

The substitute parts LTC3311HV#PBF and LTC3311JV#PBF meet all electrical and mechanical equivalence criteria. Differences exist only in the operating temperature range and internal series designation (Silent Switcher®1 versus Silent Switcher®2), which do not affect functional substitution within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

All three parts—LTC3311SEV#PBF, LTC3311HV#PBF, and LTC3311JV#PBF—are manufactured by Analog Devices Inc. and maintain active product status with full RoHS3 compliance and REACH unaffected designation. These parts are electrically and mechanically equivalent across all specified parameters.

Selection Basis:

The LTC3311SEV#PBF operates within a junction temperature range of -40°C to 125°C. The substitute parts LTC3311HV#PBF and LTC3311JV#PBF extend the maximum operating temperature to 150°C, providing additional thermal margin for applications requiring extended temperature performance.

All three parts share identical electrical specifications: 2.25V to 5.5V input voltage range, 0.5V to 5.5V adjustable output voltage, 12.5A output current, 2MHz switching frequency, and synchronous rectification. The package configuration, mounting type, and compliance certifications are identical across all variants.

Component selection should be based on application-specific operating temperature requirements and inventory availability. All parts are suitable for direct substitution within designs that do not exceed the specified thermal or electrical constraints of the selected variant.

Frequently Asked Questions (FAQ)

Q: Can LTC3311HV#PBF or LTC3311JV#PBF be used as direct replacements for LTC3311SEV#PBF?

A: Yes. The LTC3311HV#PBF and LTC3311JV#PBF are direct electrical and mechanical equivalents to the LTC3311SEV#PBF. All three parts share identical input voltage range (2.25V to 5.5V), output voltage range (0.5V to 5.5V), output current (12.5A), switching frequency (2MHz), package type (18-TFQFN Exposed Pad), and compliance certifications. The substitute parts provide extended operating temperature range (-40°C to 150°C versus -40°C to 125°C), which does not restrict their use in applications designed for the LTC3311SEV#PBF.

Q: What are the key differences between LTC3311SEV#PBF and its substitutes?

A: The primary difference is the maximum operating junction temperature. The LTC3311SEV#PBF operates to 125°C, while LTC3311HV#PBF and LTC3311JV#PBF operate to 150°C. Additionally, the LTC3311SEV#PBF is designated as Silent Switcher®2 series, while the substitute parts are Silent Switcher®1 series. All other electrical parameters, mechanical specifications, and compliance certifications are identical.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use the 18-TFQFN Exposed Pad package with supplier device package designation 18-LQFN (3x3). The physical dimensions, pin configuration, and PCB footprint are identical, enabling direct board-level substitution without layout modifications.

Q: Do all parts have the same moisture sensitivity rating?

A: Yes. All three parts carry MSL rating 3 (168 Hours), indicating identical moisture sensitivity and requiring the same handling and storage protocols.

Q: Which part should be selected for high-temperature applications?

A: For applications where the junction temperature may approach or exceed 125°C, the LTC3311HV#PBF or LTC3311JV#PBF should be selected due to their extended operating temperature range to 150°C. The LTC3311SEV#PBF is suitable for applications where the junction temperature remains below 125°C.

Q: Are all parts RoHS3 compliant?

A: Yes. All three parts—LTC3311SEV#PBF, LTC3311HV#PBF, and LTC3311JV#PBF—are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, within the thermal constraints of the application. If the existing design for LTC3311SEV#PBF operates with junction temperatures below 125°C, any of the three parts can be used. If thermal analysis indicates potential operation above 125°C, the substitute parts with 150°C rating should be selected. No circuit modifications or design changes are required for substitution.