ACT4524

40 V, 3.5 A CC/CV Step-Down DC/DC Converter with Dual Output and Separated Overcurrent Protection

Qorvo's ACT4524 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.

ACT4524 has separated output current limits for dual port Cigarette Lighter Adapter (CLA) applications. With the separated current limits, the CLA can meet Apple's MFI standard.

The product provides up to 3.5 A output current at 125 kHz switching frequency. ACT4524 utilizes adaptive drive technique to achieve good EMI performance while maintain 90% efficiency at full load for mini-size CLA designs. ACT4524 also has built-in hiccup mode output short circuit protection. 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.

ACT4524 is available in a SOP-8EP package and requires very few external components for operation.

Discontinued
i

Please use ACT4752 for new designs
End of Life announced October 9, 2020 (PCN 20-0153).
Last Time Buy: April 24, 2021
Contact your local sales representative for assistance.

Product Data SheetRev B – 01/2020
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Buy OnlineRequest a SampleContact Sales

Key Features

  • 40 V input voltage surge
  • 4.5 to 36 V operational input voltage
  • Dual 5.1 V outputs with 1% accuracy
  • Up to 3.5 A output current
  • 2.65 A constant current regulation for VOUT1
  • 1.2 A constant current regulation for VOUT2
  • Hiccup mode protection at output short
  • > 90% efficiency at full load
  • < 0.5 mA low standby input current
  • 5.7 V output over-voltage protection
  • Cord voltage drop compensation
  • Meets EN55022 Class B radiated EMI standard

Typical Applications

  • Car Chargers
  • Cigarette Lighter Adapters (CLAs)
  • Rechargeable Portable Devices
  • CV/CC Regulation DC/DC Converters

Parameters

Topology
Step-Down
Min Input Voltage (V)
4.5
Max Input Voltage (V)
36
Max Output Current (A)
3.5
Frequency (kHz)
125
ActiveCharge™ with Qualcomm QC 2.0
No
AEC-Q100
No
Cable Compensation
Yes
Sensorless CC Control
Yes
Package Type
SOP-8EP
RoHS
Yes
Lead Free
Yes
Halogen Free
Yes
ITAR Restricted
No
ECCN
EAR99

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