SC4519HSETRT Equivalent & Substitute Parts

Part Overview

The SC4519HSETRT is a buck switching regulator IC manufactured by Semtech Corporation, designed for positive adjustable output applications. This Power Management (PMIC) device delivers 3A output current in an 8-SOIC surface mount package with exposed pad. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

SC4519HSETRT

Semtech CorporationIn Stock: 18348SC4519HSETRT Datasheet

Current PartRFQ

TPS54331DR

Texas InstrumentsIn Stock: 105436TPS54331DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC4519HSETRT is determined by alignment across the following critical parameters:

Functional Requirements:

• Step-down (buck) topology with positive adjustable output
• Single output configuration
• 3A output current capability

Electrical Specifications:

• Input voltage range compatibility (minimum 4.4V, maximum 24V operation)
• Output voltage adjustability from 0.8V minimum
• Switching frequency in the 570–600kHz range

Physical & Manufacturing Requirements:

• 8-SOIC surface mount package (0.154", 3.90mm width)
• Identical pinout and footprint compatibility
• Moisture sensitivity level MSL 1 (unlimited)

Compliance & Availability:

• Active product status preferred for long-term supply assurance
• ECCN EAR99 classification maintained
• HTSUS code 8542.39.0001 alignment

Parameter Comparison

Engineering Selection Recommendations

The TPS54331DR from Texas Instruments qualifies as a direct substitute for the SC4519HSETRT based on functional and electrical alignment. Both devices operate as buck switching regulators with identical 3A output current, 0.8V minimum output voltage, and 8-SOIC package footprint.

The TPS54331DR offers extended input voltage range (3.5V–28V versus 4.4V–24V) and higher maximum output voltage (25V versus 20.4V), providing broader application flexibility. The TPS54331DR operates across a wider temperature range (-40°C to 150°C junction temperature versus -40°C to 85°C ambient), supporting higher thermal stress environments.

The TPS54331DR holds active product status with ROHS3 compliance certification, ensuring sustained supply availability and regulatory alignment for new designs. The SC4519HSETRT's obsolete classification necessitates transition to an active alternative for production continuity.

Switching frequency differential (570kHz versus 600kHz) remains within acceptable tolerance for most applications, with minimal impact on external component selection or electromagnetic interference characteristics.

Frequently Asked Questions (FAQ)

Q: Can the TPS54331DR directly replace the SC4519HSETRT without PCB modification?

A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm width) surface mount packages with matching pinout and footprint. No PCB layout changes are required for physical substitution.

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

A: The TPS54331DR accepts lower minimum input voltage (3.5V versus 4.4V) and supports higher maximum input voltage (28V versus 24V) and output voltage (25V versus 20.4V). Switching frequency differs by 30kHz (570kHz versus 600kHz). Both deliver 3A output current with 0.8V minimum adjustable output.

Q: Does the TPS54331DR require different external component values?

A: External component selection (feedback resistors, input/output capacitors, inductor) is determined by specific output voltage and current requirements. The 30kHz switching frequency difference may require minor inductor value adjustment for optimal performance, but standard component libraries typically accommodate both frequencies.

Q: Is the TPS54331DR suitable for high-temperature applications?

A: The TPS54331DR operates to 150°C junction temperature, compared to the SC4519HSETRT's 85°C ambient specification. This extended range supports thermal stress environments where the original part is insufficient.

Q: What is the supply status for each part?

A: The SC4519HSETRT is obsolete with 18,300 pieces in current inventory. The TPS54331DR is active with 105,400 pieces available, providing assured long-term supply for production and design transitions.

Q: Are both parts RoHS compliant?

A: The TPS54331DR carries ROHS3 compliance certification. The SC4519HSETRT RoHS status is not specified in available documentation.