Catalog
Active Bias Controller SMT
Key Features
• Single Positive Voltage Supply (5V to 16.5V)
• Adjustable Drain Voltage 3V to 15V
• Adjustable Drain Current up to 500mA
• Internal Negative Voltage Generator
• Active Bias Current Regulation
• Stable Bias Current Over Temperature and Process Variation and Aging
• Short Circuit Protection (Power Foldback)
• Adjustable Over/Under-Current Alarm
• Adjustable Low Vdd Voltage Alarm
• Automated Power-up Sequencing
• Enable Input for Active Bias Control
• Trigger-out Output for Daisy Chain Power-Up and Power-Down Sequencing
Description
AI
HMC920LP5E is an active bias controller which generates a regulated Drain voltage and actively adjusts the gate voltage of an external amplifier to achieve constant bias current. It can be used to bias any enhancement and depletion type amplifiers operating in Class-A regime with Drain voltages (VDRAIN) from 3V to 15V and drain currents (IDRAIN) up to 500mA, offering a complete biasing solution.The HMC920LP5E achieves excellent bias stability over supply, temperature and process variations, and eliminates the required calibration procedures used to prevent RF performance degradation due to such variations.The HMC920LP5E is housed in an RoHS compliant 5x5 mm QFN leadless package with an exposed backside pad to improve thermal characteristics.ApplicationsCellular Base StationWireless Infrastructure EquipmentMicrowave Radio & VSATMilitary & SpaceTest Instrumentation
