Qorvo ACT41000 Low Noise DC-to-DC Buck Converters
Qorvo ACT41000 Low Noise DC-to-DC Buck Converters feature a programmable output and auxiliary bias supply regulators. These synchronous step-down voltage regulators support a wide input voltage of 4.5V to 40V and integrate the high and low side MOSFETs of 50mΩ RDSON for high-efficiency power conversions. To power up a drain of GaN/GaAs Power Amplifiers (PAs), the ACT41000 supports a programmable output both in voltage and current (limit) setpoints, and the series operates in constant-current (CC) and constant-voltage (CV) seamlessly. Qorvo factory programs the default settings, and an optional MCU can re-program them on-the-fly via I2C. The precise 256-step current limit enables an MCU to detect precise IDQ by eliminating a current sensor IC.
The Qorvo proprietary current-mode control uses its on-chip oscillator clock with a spread-spectrum or an external clock to synchronize. This fixed frequency operation with the stable control loop reduces output power noise and EMI to noise-sensitive RF components. The ACT41000 series provides two auxiliary rails for peripheral devices such as controllers, sensors, and more. The ACT41000 converters are available in a 32-pin, 5mm × 5mm, thermally enhanced QFN package.
Features
- 4.5V to 40V operational input voltage
- Programmable output with factory defaults
- Output voltage of 3V to 24V in 12.5mV step
- Output current (limit) of up to 4A in 15.6mA step
- 450kHz to 2.25MHz fixed-frequency current-mode, with external clock sync. and spread-spectrum
- 5V/350mA self-bias buck converter with 20mA AUX LDO, programmable output voltage
- I2C interface, Fast-mode Plus (Fm+, 1MHz)
- Protections
- UVLO, OVP, UVP (Hiccup/Latch-off), OCP, TSD
- Thermally enhanced 5mm × 5mm QFN package
Applications
- RF PA (GaN/GaAs) drain bias/power with IDQ search
- General telecom and industrial power supplies
- Telecom RF modules
- Radar systems
Videos
Block Diagram
Yayınlandı: 2022-06-06
| Güncellenmiş: 2023-01-03