The ACT43750 is a Point of Load (PoL) Drain-Switch Driver and Gate-Bias Regulator designed for use in radar power supply applications. It operates within a wide input voltage range of 10V to 55V and provides a negative gate voltage supply ranging from -6V to -1.5V. This device is optimized for GaN RF power amplifiers, offering features such as fast drain switching with a switching frequency of 2.05 MHz and autonomous bias point calibration to maintain optimal performance over time and temperature variations.
The ACT43750 integrates an ultra-low noise inverting buck DC-DC regulator with programmable voltage reference, enabling precise control of the gate voltage. It supports high-speed drain switching and includes protection features such as under-voltage lockout (UVLO), over-voltage lockout (OVLO), over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and thermal shutdown (TSD). The device is housed in a compact 37-pin, 5 mm x 5 mm QFN package, making it suitable for space-constrained applications.
This product is particularly relevant for military and civilian radar systems, as well as RF GaN/GaAs power supply applications, where fast transient response and high current handling are critical.
The ACT43750 radar power supply integrates a ~30 ns fast drain-switch, a 13-bit DAC base gate regulator, and RFPAs (radio frequency power amplifiers) for sequencing into one standalone solution. Each RFPA drain node is switched ON or OFF by the DSW50 block, which takes a pre-regulated 10V-55V supply. In tandem with a dedicated state machine, the REGG block provides each RFPA gate node with a low-noise supply for sequencing and protection. The state machine automates RFPA gate-voltage calibration control at the proper VGATE - IDQ bias point.
| Qorvo | |
|---|---|
| Product Category | IC Voltage Regulators |
| Product Number | ACT43750 |
| Product Name | RFPoL (Point of Load) Drain-Switch Driver / Gate-Bias Regulator |
| Package Type | Other; QFN, 40-pin |
