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Description of ACT43750-101:

The Qorvo ACT43750 Power Management IC (PMIC) is a highly integrated drain switch and negative gate regulator PMIC designed to enable ultra-fast RF GaN PA drain switches. With automatic gate voltage bias sequencing, automatic calibration, and dynamic bias recalibration, the module simplifies system manufacturing while reducing the impact of temperature and device aging on RF performance.

The ACT43750 PMIC can be integrated as part of a compact three-stage power solution for phased array commercial and defense radars. The three-chip solution provides configurable GaN bias point automatic calibration to maximize system performance across different GaN power amplifiers (PA) without requiring board design changes. The chipset optimizes pulsed energy storage capacitors in phased array systems, reducing capacitance by up to 90%. The innovative architecture enables a smaller footprint, lighter weight, and lower overall operating costs.

Block diagram of ACT43750-101:

Features:

State machine logic

Automatic calibration on site at any time after delivery

Based on RSNS on PCB, digital ±31%, 1% step program

Rf GaN PA sort/protection

Drain switch, turn on and off the pre-regulated DC power supply

Drain input voltage range: 10V to 55V

Typical Trace/TFALL: 30ns

Grid bias regulator

Output voltage: -6V to -1.5V (732x µVSTEP)

Output pull current: 300mA, 500mA peak

Low noise output: <200μVRMS

Highly integrated drain switch and negative grid regulator PMIC

Realize ultra-fast RF GaN PA drain switch

Available as part of a compact 3-segment power solution

Simplify system manufacturing while reducing the impact of temperature and equipment aging on RF performance

5.0mm2, 40-pin QFN package

Lead-free, halogen-free, RoHS compliant

Applications:

Rf GaN/GaAs PA power supply

Military radar system

Civil radar system

Satellite communication uplink