LM2599T-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2599T-ADJ is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a 150 kHz step-down voltage regulator. It utilizes pulse width modulation (PWM) voltage-mode control to regulate output voltage. The device supports an input voltage range of 4.5 V to 40 V and delivers a maximum output current of 3 A. The adjustable output voltage spans from 1.2 V to 37 V. It is housed in a TO-220-7 ZIP package with seven terminals. The component operates within a temperature range of -40 °C to 125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic switching regulator designed for high-efficiency step-down applications
• Built-in fixed-frequency oscillator eliminates the need for external frequency compensation
• Includes internal thermal shutdown circuitry to protect against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring buck conversion
• Before-the-line regulators for board-level DC/DC conversion
• Simple step-down converters for battery-powered equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'ADJ' confirms the adjustable output variant rather than fixed voltage options. Ensure the 'T' designation matches the required through-hole TO-220-7 packaging. Confirm RoHS compliance status if environmental regulations apply to the target assembly. Cross-reference the manufacturer part number against official Texas Instruments databases to validate authenticity and revision history before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 3 A continuous output current is required with an input voltage up to 40 V. The 150 kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Choose the TO-220-7 package for applications requiring robust thermal dissipation via heatsinking. This regulator is suitable for designs needing an adjustable output voltage range between 1.2 V and 37 V.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2599 series represents Texas Instruments' SIMPLE SWITCHER family of switching regulators. These devices integrate a power switch and control circuitry into a single monolithic chip. The LM2599T-ADJ specifically provides adjustable output capabilities within this lineup, distinguishing it from fixed-voltage variants like the 3.3 V or 5.0 versions. It serves as a cost-effective solution for medium-power DC/DC conversion tasks.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2596T-ADJ/NOPB offers similar functionality but is limited to a 37 V maximum input voltage. For higher input voltage requirements, the LM2591HVSX-ADJ/NOPB supports up to 57 V but provides only 1 A output current. Direct pin-to-pin replacements may require verification of thermal performance and inductor selection due to slight differences in internal switch characteristics.