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TSRN 1-2433

TSRN 1-2433

Traco Power
Linear Regulator Replacement DC DC Converter 1 Output 3.3V 1A 4.6V - 36V Input
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Overview

The TSRN 1-2433 is a non-isolated step-down switching regulator designed as a high-efficiency replacement for traditional TO-220 linear regulators. It provides a fixed 3.3V output at up to 1A from a wide input voltage range of 4.6V to 36V. Unlike linear regulators, it requires no heat sink due to its high efficiency of 87.5 percent, making it ideal for space-constrained designs.

Why Choose This Part

This module features built-in filter capacitors and comprehensive protection including short-circuit and over-temperature safeguards. Its pin-compatibility with LM78xx linear regulators allows for easy drop-in upgrades to improve thermal performance without a PCB redesign.

Applications

Point-of-Load Regulation
Efficiently stepping down 12V or 24V industrial rails to 3.3V for microcontrollers and digital logic without heat dissipation issues.
Battery Powered Systems
Extending battery life in portable equipment by minimizing energy lost as heat compared to standard LDOs.
Industrial Control Boards
Providing stable power in environments with wide input voltage fluctuations and high ambient temperatures up to 85 degrees Celsius.

Key Specifications

Type Linear Regulator Replacement
Features Remote On/Off, OTP, SCP
Efficiency 87.5%
Applications ITE (Commercial)
Mounting Type Surface Mount
Power (Watts) 3.3 W
Package / Case 10-SMD Module, 6 Leads
Size / Dimension 0.60" L x 0.37" W x 0.29" H (15.2mm x 9.3mm x 7.4mm)
Number of Outputs 1
Voltage - Output 1 3.3V
Operating Temperature -40degC ~ 85degC (With Derating)
Voltage - Input (Max) 42V
Voltage - Input (Min) 4.6V
Current - Output (Max) 1A

Getting Started

To integrate the TSRN 1-2433, ensure the input capacitor is placed close to the pins if the power source is more than 2 inches away. While the device features internal filtering, an external low-ESR capacitor on the output can further reduce ripple for sensitive analog circuits.

TSRN 1-2433 Family

Part NumberDifferenceStock
TSRN 1-2433SM SM 137

Also Consider

OKI-78SR-3.3/1.5-W36-C Murata Power Solutions - Offers a higher 1.5A output current capability in a similar vertical SIP package.