ACT4529
40 V, 3 A, Wide Input Range, High-Efficiency Step-Down Converter with QC 2.0, USB Auto-Detect and USB-PD
Qorvo's ACT4529 is a wide input voltage, high efficiency step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode.
ACT4529 has built-in QC2.0 decoding to provide 5.1 / 9.1 / 12.1 V outputs as requested by attached portable devices. It also supports Apple, Samsung and BC1.2 devices to charge at full current rate. The product has an interface for USB-PD control via a tri-state digital pin. Vout is 5.1 V if this pin is floating, Vout is 9.1 V when this pin's voltage is less than 0.8 V and Vout is 12.1 V when this pin's voltage is more than 2.0 V.
The product has accurate output current limits under constant current regulation to meet MFi specification. It provides up to 3.0 A output current at 125 kHz switching frequency. ACT4529 utilizes an adaptive drive technique to achieve good EMI performance while maintaining greater than 90% efficiency at full load for mini-size CLA designs. ACT4529 also has output short circuit protection with hiccup mode. The average output current is reduced to below 6 mA when output is shorted to ground. Other features include output over-voltage protection and thermal shutdown.
ACT4529 is available in a SOP-8EP package and requires very few external components for operation.
Last Time Buy: January 13, 2027
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Key Features
- Quick Charge 2.0 certified by Qualcomm® and UL
- UL Certificate No. 4787083099-1
- Passes Apple MFi test
- 40 V input voltage surge
- 4.5 to 36 V operational input voltage
- 5.1 / 9.1 / 12.1 V output with +/- 1% accuracy
- Up to 3.0 A output current
- Constant current regulation limit
- QC2.0 decoding + USB auto-detect + USB-PD Type-C support
- Supports Apple 2.4 A, Samsung and BC1.2
- Hiccup mode protection at output short
- > 90% efficiency at full load
- 0.5 mA low standby input current
- 5.7 / 10.1 / 13.5 V output over-voltage protection for 5.1 / 9.1 / 12.1 V Outputs
- Cord voltage compensation
- Meets EN55022 Class B radiated EMI standard
- 8 kV ESD HBM protection on DP and DM
Typical Applications
- Car Chargers
- Cigarette Lighter Adapters (CLAs)
- Rechargeable Portable Devices
- CV/CC Regulation DC/DC Converters
Parameters
Technical Documents
Design Resources
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