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Qorvo ACT41000-104T
- Part No.:
- ACT41000-104T
- Manufacturer:
- Qorvo
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
ACT41000-104T.pdf
- Description:
- VOLTAGE REGULATOR FOR RF COMPONE
- Quantity:
- Payment:
- Shipping:
Inventory:1,660
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Product details
Overview
ACT41000-104T from Qorvo is a programmable RFPoL (Radio Frequency Point-of-Load) synchronous buck regulator optimized for GaN/GaAs power amplifier drain bias, featuring factory-programmed 22.0 V output voltage, 4.0 A current limit, and 3.3 V auxiliary LDO-enabling precise IDQ search and low-noise RF power delivery in telecom and radar systems.
For engineers reviewing the ACT41000-104T datasheet, pinout, applications, or equivalent options, this device delivers programmable CV/CC operation, I²C-based real-time reconfiguration, spread-spectrum EMI reduction, dual integrated bias rails (5 V/350 mA buck + 3.3 V/20 mA LDO), and thermal protection-critical for RF PA bias stability and system-level noise control.
Technical Context
The ACT41000-104T implements a fixed-frequency current-mode control architecture with internal oscillator or external clock synchronization (400 kHz–2.25 MHz), enabling stable loop response and ultra-low output noise (<10 µVRMS at 24 V/4 A). Its dual-regulator topology integrates a main 4 A buck stage with 50 mΩ high-side/low-side MOSFETs and an always-on 5 V mini-buck for internal logic and AUX LDO biasing.
Programmability is implemented via on-chip DACs and resistor-programmable pins (ILIM, FREQ, ADDR), supported by Fast-mode Plus I²C (1 MHz) for dynamic voltage/current setpoint updates. The device operates in seamless constant-voltage (CV) to constant-current (CC) transition, with 256-step current limit resolution (15.6 mA steps) eliminating need for external current-sense ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports wide-range industrial and telecom DC bus inputs without pre-regulation. |
| Main Output Voltage | 22.0 V (factory-programmed) - precise drain bias for QPA2211 RF PAs, adjustable via I²C or DACOUT/REFIN. |
| Max Output Current Limit | 4.0 A (factory-programmed) - 256-step programmability (15.6 mA resolution) enables accurate IDQ calibration. |
| Switching Frequency | 450 kHz to 2.25 MHz - resistor- or I²C-programmable; supports external sync and ±7% spread-spectrum dithering. |
| Auxiliary Rails | 5 V / 350 mA mini-buck + 3.3 V / 20 mA programmable LDO - powers controllers, sensors, and gate drivers independently. |
| I²C Interface | Fast-mode Plus (1 MHz) - enables real-time reprogramming of voltage, current limit, frequency, and protection thresholds. |
| Protections | UVLO, OVP, UVP (hiccup/latch-off), OCP, TSD - comprehensive fault handling with configurable response modes. |
| Package | 32-pin QFN, 5 mm × 5 mm, 0.5 mm pitch - thermally enhanced for >4 A continuous operation at ≤125°C junction. |
Pinout & Package
ACT41000-104T uses a thermally enhanced 32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad connected to PGND. Pin functions are validated per Qorvo ACT41000 Rev. B datasheet (01-Apr-2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (7,8,17,18) | Main-buck input power rail | High-current path for 4.5–40 V input; requires ≥2×22 µF bulk capacitance to PGND. |
| SW (11,12,13) | Main-buck switching node | Connects to external inductor; high di/dt node requiring tight layout and Kelvin sensing for current sense. |
| FB_VO (21) | Main-buck voltage feedback | Resistor-divider input referenced to REFIN; sets output voltage with ±1% accuracy at 24 V target. |
| CSN (20) | Main-buck current sense input | Differential input (±0.3 V range) for RCS resistor; enables precise CC mode activation at 22 V/4 A. |
| ILIM (26) | Current limit programming | Resistor-to-AGND sets 15.6 mA step current limit; factory-configured for 4.0 A on ACT41000-104T. |
| PG (19) | Main-buck power-good indicator | Open-drain output signaling valid regulation (±5% window); delays 10 µs–4 ms post-startup. |
| EN (29) | Main-buck enable control | Logic-high active (1.25 V threshold); supports 30 µs minimum pulse width for controlled sequencing. |
| SCL/SDA (31,32) | I²C interface | Fast-mode Plus (1 MHz) open-drain ports with 10 pF input capacitance; require pull-ups to 3.3 V or 5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable CV/CC operation | Seamless transition between constant-voltage and constant-current modes enables automatic IDQ search for RF PAs without external circuitry. |
| Integrated dual bias rails | Self-powered 5 V/350 mA mini-buck and 3.3 V/20 mA programmable LDO eliminate need for separate bias supplies in RF modules. |
| Spread-spectrum EMI reduction | ±7% frequency dithering over 64-cycle period lowers peak radiated emissions-critical for noise-sensitive RF front-ends. |
| Factory-default configuration | Pre-programmed for 22.0 V / 4.0 A / 3.3 V AUX-reduces design-in time and eliminates initial calibration for QPA2211 applications. |
| Thermal robustness | 125°C max operating junction temperature and soft/hard thermal shutdown (145°C/155°C) ensure reliability in compact RF enclosures. |
| I²C register accessibility | Full read/write access to 24+ registers-including voltage, current limit, frequency, protection thresholds, and status flags-for closed-loop system control. |
Applications
| RF PA Drain Bias | Telecom RF Module Power |
|---|---|
|
Use Scenario: Biasing the drain of Qorvo QPA2211 GaN power amplifier in 5G macro base stations. IC Role / Device Role / Timing Role: Primary high-efficiency, low-noise 22 V/4 A point-of-load regulator delivering stable drain supply while dynamically adjusting current limit for IDQ optimization. Use Value: Eliminates discrete current-sense IC and external DAC, reducing BOM count by 3 components and improving thermal margin via integrated 50 mΩ MOSFETs. |
Use Scenario: Powering multi-channel RF transceivers in small-cell radios with strict EMI limits. IC Role / Device Role / Timing Role: Main-buck provides clean 24 V PA rail; mini-buck and AUX LDO independently power FPGA I/O banks and analog front-end sensors. Use Value: Spread-spectrum switching and <10 µVRMS output noise prevent desensitization of adjacent receive paths in dense RF layouts. |
| Radar System PA Supply | Industrial RF Signal Generator |
|
Use Scenario: High-reliability drain supply for GaAs PAs in airborne radar transmitters operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Synchronous buck converter with latch-off UVP/OVP and hiccup-mode OCP ensures fail-safe operation during voltage transients on aircraft 28 V bus. Use Value: AEC-Q100 qualified variant available; thermal shutdown and 24°C/W θJA support conduction-cooled chassis mounting without forced air. |
Use Scenario: Programmable benchtop RF source requiring rapid output voltage sweeps (5–24 V) and current limiting during device characterization. IC Role / Device Role / Timing Role: I²C-controlled voltage/current setpoint changes enable automated test sequences without hardware reconfiguration. Use Value: 12.5 mV voltage steps and 15.6 mA current steps allow sub-1% resolution tuning-matching lab-grade instrument precision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RFPoL buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACT41000-102T | Factory-programmed for 24.0 V / 4.0 A output; identical pinout, package, and feature set. | Targeted for SPATIUM® RF products rather than QPA2211; same thermal and noise performance. | Select when 24 V drain bias is required instead of 22 V; no PCB or firmware changes needed. |
| ACT41001-101T | AEC-Q100 qualified version with identical electrical specs; differs only in qualification testing and traceability. | Required for automotive radar or ADAS applications where automotive-grade reliability is mandated. | Choose for automotive deployments; shares full register compatibility and layout footprint with ACT41000-104T. |
Compared with ACT41000-104T, ACT41000-102T offers higher nominal output voltage for broader PA compatibility, while ACT41001-101T adds automotive qualification without altering functionality-making both drop-in alternatives for voltage-tuned or safety-critical designs.
Availability
ACT41000-104T is available at Aetrix Electronics and suitable for RF power amplifier biasing, telecom infrastructure power supplies, and radar transmitter subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ACT41000-104T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Qorvo is a global leader in RF solutions, specializing in gallium nitride (GaN), silicon carbide (SiC), and advanced RF power semiconductors for defense, aerospace, and communications markets.
The ACT41000 product line is designed specifically for radio frequency point-of-load applications-delivering ultra-low noise, programmable CV/CC operation, and integrated bias rails to simplify high-frequency PA power system design.
FAQ
What is the factory-programmed output voltage and current limit for ACT41000-104T?
The ACT41000-104T is factory-programmed for a 22.0 V output voltage and 4.0 A output current limit, optimized for Qorvo QPA2211 GaN power amplifiers. These defaults are stored in non-volatile memory and can be overridden in real time via I²C commands or resistor programming on ILIM and FB_VO pins. The 256-step current limit resolution (15.6 mA per step) enables precise IDQ calibration without external sensing components.
Does ACT41000-104T support external clock synchronization and spread-spectrum operation?
Yes, ACT41000-104T supports both external clock synchronization via the SYNC pin and built-in spread-spectrum dithering (±7% over 64 cycles) to reduce EMI peaks. The switching frequency is programmable from 450 kHz to 2.25 MHz using the FREQ pin resistor or I²C register writes. When configured as clock-master (ADDR open), SYNC outputs a synchronized clock; as clock-slave (ADDR = 50 kΩ), it accepts external timing-enabling multi-phase or system-wide EMI alignment.
How does ACT41000-104T implement constant-current (CC) mode for RF PA biasing?
ACT41000-104T enters constant-current mode when the differential voltage between FB_VO and CSN crosses programmable thresholds (e.g., 20.7 mV at 25% limit, 81.5 mV at 100%). It maintains precise current regulation using internal current-mode control and 256-step ILIM programming-enabling automatic IDQ search by ramping voltage until CC mode activates. No external current-sense amplifier or DAC is required, as the device directly converts ILIM resistor value into a reference voltage for the error amplifier.
What auxiliary power rails does ACT41000-104T provide, and how are they configured?
ACT41000-104T integrates two auxiliary rails: a 5 V / 350 mA self-bias mini-buck regulator (V5V) and a 3.3 V / 20 mA programmable LDO (VLDO). The mini-buck powers internal logic and serves as the reference for VLDO; VLDO output is factory-set to 3.3 V but adjustable from 0.9 V to 4.05 V in 50 mV steps via I²C register Reg0D. Both rails start up before the main buck and remain active during sequencing-supporting controllers, sensors, and gate drivers independently.
Is ACT41000-104T pin-compatible with other variants in the ACT41000 family?
Yes, all ACT41000 variants-including ACT41000-104T-share identical 32-pin QFN packaging, pinout, and mechanical footprint. Differences are limited to factory-programmed parameters (output voltage, current limit, AUX LDO voltage) and optional AEC-Q100 qualification. This allows direct substitution across variants without PCB redesign, provided the application's voltage/current requirements align with the selected part number's default settings.
ACT41000-104T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Qorvo
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 450kHz ~ 2.25MHz
- Voltage/Current - Output 1:
- 22V, 3.5A
- Voltage/Current - Output 2:
- 3.3V, 20mA
- Voltage/Current - Output 3:
- Fixed
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 4.5V ~ 40V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ACT41000-104T FAQ
1.How can I place an order for ACT41000-104T through Aetrix?
Please submit a Request for Quotation (RFQ) for ACT41000-104T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ACT41000-104T reliable?
The price and inventory of ACT41000-104T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACT41000-104T is usually 5 days.
3.What payment methods are accepted for ACT41000-104T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACT41000-104T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACT41000-104T?
ACT41000-104T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACT41000-104T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ACT41000-104T?
For technical support, including ACT41000-104T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACT41000-104T requirements.
6.How does Aetrix verify that ACT41000-104T is sourced from the original manufacturer or authorized distributors?
All ACT41000-104T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ACT41000-104T meets industry standards.
7.What is the process for return or replacement of ACT41000-104T?
All ACT41000-104T units undergo pre-shipment inspection (PSI). If there is an issue with ACT41000-104T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ACT41000-104T part is unused and in its original packaging.
Return procedure for ACT41000-104T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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