Le blog de l'entreprise Mingjiada Electronics Supplies and Purchasing Qorvo ACT43850 RF Load‑Point Step‑Down DC‑DC Converter

Shenzhen Mingjiada Electronics Co., Ltd. a globally renowned authorised independent distributor of electronic components, currently stocks genuine Qorvo ACT43850 components from stock. We also offer long-term, high-value buy-back services for stock of this model, providing our customers with a one-stop supply and procurement service.

Product Overview
The ACT43850 is a radio frequency point-of-load (RFPoL) step-down DC-DC power converter launched by Qorvo, specifically designed for high-power RF systems such as phased-array radars and electronic warfare applications. This device is a core member of Qorvo’s RFPoL regulator series and, together with the companion device ACT43750, forms a compact, complete power supply solution suitable for gallium nitride (GaN) and gallium arsenide (GaAs) RF power amplifier (PA) devices that demand stringent requirements for fast transient response and high-current pulse loads.

The ACT43850 is a buck DC-DC controller that provides a constant DC output voltage (CV) for the drain supply of power amplifiers and requires the use of an external power FET. Its fast-responding, fixed-frequency current-mode converter architecture provides stable regulation, resulting in low electromagnetic interference and low-noise output. The output voltage level can be programmed via analogue and/or I²C interfaces to set initial default setpoints and dynamic runtime targets.

ACT43850 Key Parameters and Features
The main technical specifications of the ACT43850-101 are as follows:
Topology: Step-Down
Input voltage range: Up to 150 V
Output voltage range: 20 V to 55 V
Maximum output current: 20 A
Switching frequency: 500 kHz to 900 kHz (programmable)
Package type: 25-pin QFN, 4.0 mm × 4.0 mm, 0.4 mm pitch
Operating junction temperature: –40 °C to 150 °C
Output noise: 2.4 mVRMS @ 50 V (100 Hz to 100 kHz)
Loop bandwidth: ~100 kHz

ACT43850 Key Features:
Wide input voltage range: Supports input voltages up to 150 V, meeting the power supply requirements of high-voltage RF systems
Programmable output: Output voltage configurable from 20 V to 55 V, suitable for GaN PA bias
Low-noise design: 2.4 mVRMS output noise, with a stable loop phase margin of approximately 60°
Fast transient response: Loop bandwidth of approximately 100 kHz to handle rapid switching of radar pulse loads
Multiple protection functions: Integrated protection mechanisms including UVLO, OVLO, OVP, UVP, OCP and TS
Compact package: 4 mm × 4 mm QFN package, optimised for high-voltage node creepage distance based on a standard 32-pin QFN layout

Key Advantages of the ACT43850
Ultra-compact design: The ACT43850 solution reduces the footprint by approximately 30% compared to traditional power supply solutions and lowers capacitance requirements by approximately 90%, significantly saving PCB space and facilitating the miniaturisation of RF transmitter modules.
Ultra-fast transient response: For radar pulse loads ranging from 0 A to 20 A, voltage deviation is minimal and stability is restored within 100 µs, effectively safeguarding RF link performance.
Low noise and low EMI: The optimised architecture minimises RF noise and electromagnetic interference, significantly improving the signal-to-noise ratio of radar arrays.
Military-grade reliability: Complies with stringent environmental requirements and is suitable for high-reliability applications such as aerospace and defence.

Typical Applications
The ACT43850 is widely used in the following fields:
Power supply for phased array radar T/R modules: Provides stable and efficient power management for radar transceiver modules
GaN power amplifier bias for electronic warfare systems: Meets the drain bias requirements of GaN PAs
Power supplies for broadband communication RF front-ends: Provides low-noise power supply solutions for broadband communication equipment
Military airborne/shipborne RF equipment: Meets military-grade environmental reliability requirements
Laser drivers and optical signal lights: Provides stable constant-voltage output

Mingjiada Electronics Supply and Demand Services
Established in 1996, Shenzhen Mingjiada Electronics Co., Ltd. is a leading global authorised independent distributor of electronic components. Certified to the ISO 9001 Quality Management System and ISO 14001 Environmental Management System, the company provides a full range of component supplies and supply chain solutions for sectors including 5G communications, automotive electronics, industrial automation, the Internet of Things (IoT) and artificial intelligence.

Supply Services
Mingjiada Electronics offers genuine, in-stock Qorvo ACT43850 components, with 1,000 pieces in stock, manufactured 26+ years ago, in QFN-25 packaging. All items are brand new and genuine, with fast delivery times. The company maintains a stock of over 2 million popular models and has established partnerships with more than 500 renowned global brands, enabling it to supply a full range of products from high-end chips to basic components.

Purchasing/Recycling Services
Mingjiada Electronics offers long-term, high-price recycling services for Qorvo military-grade RF/power chips such as the ACT43850 and QPF0219. If you have ACT43850 stock that needs to be disposed of, please contact Mingjiada Electronics to realise the value of your inventory.

Contact Details
Tel: +86 13410018555 / 0755-83294757
Email: sales@hkmjd.com
Website: www.integrated-ic.com
Address: Rooms 1239–1241, New Asia Guoli Building, Zhenzhong Road, Futian District, Shenzhen
Tags: ACT43850-101, ACT43850-10, ACT43850-1, ACT43850