High-Current Overvoltage Protectors with Adjustable OVLO
• Wide supply voltage range from 3.8V to 28V
• Low ON resistance: 50mΩ(typ) at a supply voltage
• Flexible overvoltage-protection trip level
-Wide adjustable OVLO threshold range from 4V
-Preset internal accurate OVLO threshold: 6.8V
• Low quiescent current 70µA
• Internal 8ms startup debounce
• Protection circuitry:
-Surge Immunity to 100V
• Low Capacitance ESD Protection
• Available in TDFN3x3-10 Packages
• Lead Free Green Devices Available (RoHS
The APL3228 overvoltage protection devices feature a
low 50mΩ(typ) RON internal FET and protect low-voltage
systems against voltage faults up to +28VDC. An internal
clamp also protects the devices from surges up to +100V.
When the input voltage exceeds the overvoltage threshold,
the internal FET is turned off to prevent damage to the
protected downstream components.
The overvoltage protection threshold can be adjusted with
optional external resistors to any voltage between 4V and
20V. With the OVLO input set below the external OVLO
select voltage, the APL3228 automatically choose the
accurate internal trip thresholds. The internal overvoltage
thresholds (OVLO) are preset to 6.8V. The devices fea-
ture an open-drain ACOK output indicating a stable sup-
ply between minimum supply voltage and VOVLO. The
APL3228 are also protected against over current events
by an internal thermal shutdown.
• Smart Phones
• Tablet PCs
• Mobile Internet Devices
Simplified Application Circuit
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Jun., 2017