FEATURES
• AEC-Q100 Automotive Qualified
• -40 °C ~ 125 °C Junction Temperature Range Automotive
Qualified
• Passes SAE J1752 M8A EMC testing
• Quick Charge™ 2.0 Certified by Qualcomm® and UL.
UL Certificate No. 4787083099-1
• 40 V Input Voltage Surge
• 4.5 V - 36 V Operational Input Voltage
• 5.1 V/9.1 V/12.1 V Output with +/-1% Accuracy
• Up to 3.0 A Output current
• Constant Current Regulation Limit
• QC2.0 + Auto-Detect + USB-PD Type-C Support
• Hiccup Mode Protection at Output Short
• >90% Efficiency at Full Load
• 0.5 mA Low Standby Input Current
• 5.7 V/10.1 V/13.5 V Output Over-voltage
Protection for 5.1 V/9.1 V/12.1 V Outputs
• Cord Voltage Compensation
• Meet EN55022 Class B Radiated EMI Standard
• 8 kV ESD HBM Protection on DP and DM
• SOP-8EP Package

APPLICATIONS
• Automotive Applications
• Car Charger
• Cigarette Lighter Adaptor (CLA)
• CV/CC regulation DC/DC converter

GENERAL DESCRIPTION
ACT4529 is a wide input voltage, high efficiency stepdown
DC/DC converter that operates in either CV
(Constant Output Voltage) mode or CC (Constant
Output Current) mode. This device has QC2.0 built in to
provide 5.1 V/9.1 V/12.1 V outputs as requested by
attached portable devices. Besides building in QC2.0
decoding, it also supports Apple, Samsung and BC1.2
devices to charge at full current rate. ACT4529 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 9.1V when this
pin voltage is less than 0.8 V and VOUT is 12.1 V while
this pin voltage is more than 2.0 V.
ACT4529 has accurate output current limits under
constant current regulation. It provides up to 3.0 A
output current at 125 kHz switching frequency.
ACT4529 utilizes adaptive drive technique to achieve
good EMI performance while main >90% efficiency at
full load for mini size CLA designs. It 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.
This device is available in a SOP-8EP package and
requires very few external components for operation.
For details on SAE J1752 M8A EMC performance and
testing, refer to Active-Semi application note AN-106,
ACT4529M Automotive EMC Performance.