VIPER53SP Equivalent & Substitute Parts

Part Overview

The VIPER53SP is an offline flyback converter IC manufactured by STMicroelectronics, designed for isolated power management applications. This device integrates an internal power switch and operates at switching frequencies up to 300kHz with a maximum power rating of 65W. The VIPER53SP is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.

Substiute Parts

VIPER53SP

STMicroelectronicsIn Stock: 1717VIPER53SP Datasheet

Current PartRFQ

VIPER53SPTR-E

STMicroelectronicsIn Stock: 2897VIPER53SPTR-E Datasheet

SimilarRFQ

VIPER53ESP-E

STMicroelectronicsIn Stock: 917VIPER53ESP-E Datasheet

Parametric EquivalentRFQ

VIPER53SP-E

STMicroelectronicsIn Stock: 2154VIPER53SP-E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VIPER53SP are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Internal Switch(s): Integrated power switch
• Voltage - Breakdown: 620V rating
• Voltage - Start Up: 11.5V threshold
• Voltage - Supply (Vcc/Vdd): 8.4V ~ 19V operating range
• Frequency - Switching: Up to 300kHz maximum
• Power (Watts): 65W capacity
• Fault Protection: Current Limiting, Over Load, Over Temperature, Short Circuit
• Control Features: EN, Frequency Control, Soft Start
• Operating Temperature: -40°C ~ 150°C (TC)
• Package / Case: PowerSO-10 Exposed Bottom Pad
• Mounting Type: Surface Mount
• Base Product Number: VIPER53

All substitute parts maintain these specifications without deviation. Differences exist only in product status, packaging format, and moisture sensitivity level (MSL) ratings, which do not affect functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The VIPER53SP is classified as obsolete and should be replaced with an active equivalent for new designs and production continuity. Three active substitute parts are available, all maintaining complete parametric equivalence:

VIPER53SPTR-E is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, suitable for automated assembly processes requiring tape-and-reel delivery. This part carries an MSL rating of 3 (168 Hours).

VIPER53ESP-E is supplied in Tube packaging format, appropriate for manual assembly or lower-volume production environments. This part carries an MSL rating of 3 (168 Hours).

VIPER53SP-E is supplied in Tube packaging format, functionally identical to VIPER53ESP-E with the same MSL rating of 3 (168 Hours).

All three substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory conformance. Selection between these alternatives depends solely on packaging and delivery format requirements for the specific manufacturing process. The MSL difference between the obsolete part (MSL 1) and active substitutes (MSL 3) requires adherence to moisture handling procedures during storage and assembly for the substitute parts.

Frequently Asked Questions (FAQ)

Q: Can VIPER53SPTR-E, VIPER53ESP-E, and VIPER53SP-E be used interchangeably with VIPER53SP in existing designs?

A: Yes. All three substitute parts maintain identical electrical specifications, power ratings, control features, fault protection mechanisms, and operating temperature ranges. Direct substitution is supported without circuit modification.

Q: What is the primary difference between the substitute parts?

A: The substitute parts differ only in packaging format and moisture sensitivity level. VIPER53SPTR-E is supplied in Cut Tape and Digi-Reel format for automated assembly. VIPER53ESP-E and VIPER53SP-E are supplied in Tube format. All three carry MSL 3 (168 Hours) ratings, compared to the obsolete VIPER53SP with MSL 1 (Unlimited).

Q: Does the MSL 3 rating of substitute parts affect circuit performance?

A: No. MSL rating specifies moisture handling requirements during storage and assembly, not circuit performance. MSL 3 (168 Hours) indicates the component must be used within 168 hours of package opening under specified humidity conditions. This is a manufacturing process consideration, not a functional limitation.

Q: Which substitute part should be selected for high-volume automated assembly?

A: VIPER53SPTR-E is optimized for automated assembly processes, supplied in Cut Tape and Digi-Reel format compatible with pick-and-place equipment.

Q: Are all substitute parts currently in active production status?

A: Yes. VIPER53SPTR-E, VIPER53ESP-E, and VIPER53SP-E are all classified as active products, ensuring long-term availability and supply continuity.

Q: Do the substitute parts require different PCB layout or thermal management compared to VIPER53SP?

A: No. All parts use identical PowerSO-10 Exposed Bottom Pad packaging with surface mount configuration. PCB layout, thermal management, and component placement remain unchanged.

Q: What inventory levels are available for each substitute part?

A: VIPER53SPTR-E has 2800 pieces in stock, VIPER53ESP-E has 897 pieces in stock, and VIPER53SP-E has 2050 pieces in stock.