L7985ATR

Voltage Regulators - DC DC Switching Regulators Overview

The L7985ATR is a step-down switching regulator from STMicroelectronics, housed in an HSOP-8 package. It features an embedded power MOSFET capable of delivering up to 2 A DC output current. The device supports an input voltage range of 4.5 V to 38 V and provides an adjustable output voltage from 0.6 V to the input voltage level. It operates with an internal switching frequency of 250 kHz, which can be externally adjusted up to 1 MHz. The component includes internal soft-start and enable functions, low dropout operation at 100% duty cycle, voltage feed-forward, and zero load current capability. Protection features include overcurrent and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 2 A DC output current with embedded power MOSFET
• Adjustable switching frequency from 250 kHz up to 1 MHz
• Low dropout operation enabling 100% duty cycle functionality
• Comprehensive protection including overcurrent and thermal shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down switching power supply designs
• Embedded systems requiring regulated DC voltage
• Industrial applications utilizing HSOP-8 packaged regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tape specifications. Confirm that the HSOP-8 package variant matches the required thermal and mechanical constraints for the target application. Cross-reference the part number with the latest datasheet to validate active status and compliance details before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a buck converter topology is required with an input voltage up to 38 V and a continuous output current of 2 A. The adjustable switching frequency allows optimization for efficiency or component size. Ensure the design accommodates the exposed pad thermal requirements inherent to the HSOP-8 package for adequate heat dissipation under full load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

The L7985ATR belongs to the L7985 series of step-down switching regulators manufactured by STMicroelectronics. This series is designed for high-reliability applications in automotive and industrial sectors. The device integrates a power MOSFET to minimize external component count, offering a compact solution for voltage regulation tasks within the specified input and output ranges.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The A7985ATR is a documented alternative within the same product family, sharing similar electrical characteristics and pinout compatibility. Verify package equivalence and specific qualification standards when substituting between these variants.