S-13R1G39-A4T2U3

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The S-13R1G39-A4T2U3 is part of a family of linear voltage regulators offered by Sigma-Tau Electronic, a leading manufacturer of integrated power management ICs (PMICs). The device is designed to provide a regulated output voltage from an input voltage of 2.25 V to 6 V, enabling efficient low power operation for a variety of products. The device is available in a through-hole DIP package.

The S-13R1G39-A4T2U3 is a non-synchronous monolithic integrated circuit with two voltage regulator circuits. Each one of them provides a regulated output voltage in a range different from the other, so that conditions of load variation, spanning from light loads to the heaviest ones, produces a constant output voltage. The output voltage is adjustable from 1.3 V to 3.9 V when the device works in adjustable regulator mode. The selectable current limit of 150 mA, 250 mA, or 350 mA makes possible effective power control for loads up to 1 A.

Sigma-Tau’s S-13R1G39-A4T2U3 features a high power dissipation, very low dropout voltage, low quiescent current, excellent line and load regulation, thermal protection, and a low output noise. This regulator is compatible with microprocessors, PLCs, embedded controllers, mobile phones, and GPS systems. It is also suitable for applications that don’t require a synchronous converter.

The S-13R1G39-A4T2U3 is built with a P-channel MOSFET (Input MOSFET), N-channel MOSFETs (output MOSFETs), resistors, capacitors (ceramic and electrolytic), and Schottky diodes. It consists of a control logic with an error amplifier, current limit circuit, a thermal shut-down circuit, and voltage reference.

The principle of operation for the S-13R1G39-A4T2U3 is based on the use of P-channel MOSFETs as input devices and N-channel MOSFETs as output devices. The device senses the voltage difference between the output voltage and the reference voltage of the error amplifier, and then adjusts the gate voltage to the input MOSFET to keep the output voltage constant. The current limit circuit monitors the current through the output MOSFET and shuts down the IC when the current reaches the predetermined level. Thermal protection shuts off the device when the junction temperature of the chip exceeds the maximum specified level, and then turns the device back on when the temperature drops.

The S-13R1G39-A4T2U3 can be used in a variety of applications such as automotive systems, industrial control equipment, and computing and communication equipment, as well as many other power management applications. It provides improved electrical performance and a robust operation, making it ideal for both high power and low power applications.

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