VIPER319XDTR Equivalent & Substitute Parts

Part Overview

The VIPER319XDTR is an offline switch IC manufactured by STMicroelectronics, classified as a Power Management (PMIC) component. This device functions as a converter supporting multiple topologies including Boost, Buck, Buck-Boost, and Flyback configurations with a switching frequency of 132kHz. The part is actively produced and maintains robust inventory availability of 4529 units in stock.

Identification of equivalent and substitute parts becomes necessary when addressing supply chain constraints, design optimization requirements, or inventory management across manufacturing operations. Alternative parts within the VIPER™ series provide functionally compatible solutions while maintaining electrical and mechanical compatibility with existing designs.

Substiute Parts

VIPER319XDTR

STMicroelectronicsIn Stock: 4615VIPER319XDTR Datasheet

Current PartRFQ

VIPER318LDTR

STMicroelectronicsIn Stock: 5130VIPER318LDTR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VIPER319XDTR is determined by strict alignment across the following critical parameters:

Electrical Compatibility Parameters:

• Voltage breakdown rating (800V)
• Supply voltage range (4.5V ~ 30V)
• Startup voltage threshold (8V)
• Switching frequency (132kHz)
• Power rating (1W)
• Supported topologies (Boost, Buck, Buck-Boost, Flyback)
• Fault protection features (Over Load, Over Power, Over Temperature, Over Voltage, Short Circuit)
• Control features (Soft Start)

Mechanical & Environmental Compatibility Parameters:

• Package type (16-SOIC, 0.154", 3.90mm Width)
• Mounting type (Surface Mount)
• Operating temperature range (-40°C ~ 150°C)
• Moisture sensitivity level (MSL 3)

Compliance & Status Parameters:

• Manufacturer (STMicroelectronics)
• Series (VIPER™)
• Product status (Active)
• RoHS compliance (ROHS3)
• REACH status (REACH Unaffected)

Parts meeting all parameters in these three categories qualify as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The VIPER318LDTR qualifies as a parametric equivalent and direct substitute for the VIPER319XDTR based on complete alignment across all electrical, mechanical, and compliance parameters. Both devices are manufactured by STMicroelectronics within the VIPER™ series and maintain identical specifications for voltage ratings, switching frequency, power handling, supported topologies, and fault protection mechanisms.

Both parts carry Active product status, ensuring continued manufacturing support and supply chain stability. Compliance certifications are identical, with both devices meeting ROHS3 requirements and maintaining REACH Unaffected status. Packaging, mounting type, and environmental operating ranges are fully compatible, enabling direct PCB-level substitution without design modification.

Inventory availability is robust for both parts, with the VIPER318LDTR maintaining slightly higher stock levels at 5100 units compared to 4529 units for the VIPER319XDTR. Selection between these parts may be driven by supply chain availability, procurement lead times, or inventory management objectives.

Frequently Asked Questions (FAQ)

Q: Can the VIPER318LDTR be used as a direct replacement for the VIPER319XDTR on existing PCBs?

A: Yes. The VIPER318LDTR is a parametric equivalent with identical package specifications (16-SOIC, 0.154", 3.90mm Width), mounting type (Surface Mount), and pinout compatibility. No PCB redesign is required for substitution.

Q: Are the electrical specifications identical between these two parts?

A: Yes. Both parts share identical voltage breakdown (800V), supply voltage range (4.5V ~ 30V), startup voltage (8V), switching frequency (132kHz), power rating (1W), supported topologies (Boost, Buck, Buck-Boost, Flyback), and fault protection features (Over Load, Over Power, Over Temperature, Over Voltage, Short Circuit).

Q: Do both parts support the same converter topologies?

A: Yes. Both the VIPER319XDTR and VIPER318LDTR support Boost, Buck, Buck-Boost, and Flyback topologies with identical 132kHz switching frequency and 1W power handling capability.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the identical temperature range of -40°C to 150°C (junction temperature), suitable for industrial and extended-temperature applications.

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

A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and carry identical moisture sensitivity levels (MSL 3, 168 Hours). Compliance certifications are fully equivalent.

Q: Which part should be selected based on availability?

A: The VIPER318LDTR currently maintains higher inventory at 5100 units compared to 4529 units for the VIPER319XDTR. Selection may prioritize the part with shorter procurement lead times or better supply chain positioning for your specific application timeline.

Q: Are the fault protection features identical?

A: Yes. Both parts include identical fault protection mechanisms: Over Load, Over Power, Over Temperature, Over Voltage, and Short Circuit protection, along with Soft Start control features.

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

A: Yes. The complete parameter alignment across electrical, mechanical, and environmental specifications enables either part to be selected for new designs without functional or compatibility concerns.