LNBH25LPQR

Special Purpose Regulators Overview

The LNBH25LPQR is a monolithic voltage regulator and interface IC designed for analog and digital satellite receivers, Sat-TV systems, and Sat-PC cards. It integrates an I²C bus interface with a built-in DC-DC step-up converter to manage Low Noise Block downconverter (LNB) power and control signals. The device operates within an input voltage range of 8V to 16V and provides regulated outputs of 13V and 18.15V. It is housed in a 24-pin VFQFN package with an exposed pad, suitable for surface mount installation, and functions reliably across an operating temperature range of 0°C to 85°C.

Special Purpose Regulators Feature Summary

• Integrates a complete interface between the LNB and the I²C bus for digital control
• Includes a built-in DC-DC step-up converter to generate required LNB supply voltages
• Monolithic design combining voltage regulation and signal switching capabilities

Special Purpose Regulators Applications

• Analog and digital satellite receiver set-top boxes
• Satellite television (Sat-TV) terminal equipment
• Satellite PC cards and adapters

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific suffix 'LPQR' matches the required 24-QFN package and tape-and-reel configuration. Check for obsolescence notices as this series may be subject to discontinuation. Ensure ESD protection protocols are followed during handling due to the sensitive nature of the integrated circuit.

Special Purpose Regulators Selection Notes

Select this component when designing satellite reception circuits requiring integrated LNB power management and I²C control. It is appropriate for applications needing a compact solution that combines voltage regulation with signal switching. Consider the 24-VFQFN package constraints and thermal dissipation requirements for the exposed pad. Verify compatibility with the system's I²C bus voltage levels and the available input power supply range.

Special Purpose Regulators Part Context

This part belongs to the LNBH25 family of specialized power management ICs from STMicroelectronics. These components are engineered specifically for the satellite communication sector, providing essential power conversion and control interfaces. The LNBH25 series simplifies the design of satellite tuners by integrating multiple functions into a single chip, reducing board space and component count compared to discrete solutions.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult STMicroelectronics technical support for current alternatives if this component is discontinued.