STMicroelectronics Step-Down Switching Voltage Regulator 2A 4.5-38V Input HSOP 8-Pin L7985ATR

STMicroelectronics L7985ATR is a high-performance step-down switching voltage regulator designed for industrial and commercial electronic applications. It integrates a 2.5 A minimum current limited embedded power MOSFET capable of delivering up to 2 A DC output current depending on load requirements. The regulator operates over a wide input voltage range from 4.5 V to 38 V, ensuring versatility in power supply designs.

The output voltage is adjustable from 0.6 V to the input voltage (VIN), offering flexibility tailored to different circuits. It features an internal oscillator operating at 250 kHz frequency, which can be programmed externally up to 1 MHz to adapt switching characteristics for efficiency or noise requirements.

Additional functional enhancements include an internal soft-start mechanism, enable control, low dropout operation with a 100% duty cycle capability, and voltage feed-forward. The device supports zero load current operation to minimize power losses during idle conditions. Comprehensive protection mechanisms like overcurrent and thermal shutdown protect both the device and connected circuitry.

The L7985ATR is housed in an HSOP 8-Pin package with an exposed pad that significantly reduces junction-to-ambient thermal resistance to approximately 40 °C/W, promoting reliable thermal management in compact PCB layouts. Its compact dimensions of 5 mm length, 4 mm width, and 1.55 mm height enable space-efficient design integration.

This voltage regulator is widely used in power management systems for industrial electronics, automotive auxiliary systems that do not require automotive standards compliance, telecommunications equipment, and other embedded power supply applications where precise voltage regulation and efficiency are critical.

The device features a 2.5A minimum current limited embedded power MOSFET for efficient power delivery. Input voltage supports from 4.5 V to a maximum of 38 V to accommodate a wide range of applications. Output voltage is adjustable from 0.6 V up to input voltage for flexible regulation.

Operates at an internal switching frequency of 250 kHz, programmable up to 1 MHz for optimized performance. Includes internal soft-start and enable functions to protect circuits during power-up. Low dropout operation allows 100% duty cycle for sustained output at low input voltages.

Incorporates voltage feed-forward for improved transient response and stability. Features zero load current operation to enhance power efficiency in standby modes. Provides overcurrent and thermal protection ensuring device robustness under fault conditions.

Compact HSOP8 package with exposed pad offers reduced thermal resistance down to 40 °C/W. Explore more Voltage Regulators and power management integrated circuits from STMicroelectronics and other leading manufacturers here on EnvMart.