APE8901 Advanced Power Electronics Corp., APE8901 Datasheet - Page 5

• Manufacturer Part Number: APE8901
• Manufacturer: Advanced Power Electronics Corp.

Specifications of APE8901

• Vin(min): 1
• Vin(max): 5.5
• Vout(min): 0.8
• Vout(max): 2.8
• Iout(max): 1
• Vref: 0.8
• Quiescent Current Typ.: 100uA
• En: ?
• Pok: ?
• Package: Exposed SOP8,SOT-26,DFN 2x2

VOUT
Power-On-Reset
Internal Soft-Start
Output Voltage Regulation
Current-Limit
Under-Voltage Protection (UVP)
Thermal Shutdown
PIN DESCRIPTION
FUNCTION DESCRIPTION
Advanced Power
Electronics Corp.
an output capacitor with this pin for closed-loop compensation and improving transient responses.
prevent wrong logic controls. The POR function initiates a soft-start process after the two supply
voltages exceed their rising POR threshold voltages during powering on. The POR function also
pulls low the POK pin regardless the output voltage when the VCNTL voltage falls below its falling
POR threshold.
surge at start-up. The typical soft-start interval is about 2mS.
NMOS regulates output to the preset voltage. The error amplifier designed with high bandwidth
and DC gain provides very fast transient response and less load regulation. It compares the
reference with the feedback voltage and amplifies the difference to drive the output NMOS which
provides load current from VIN to VOUT.
prevent load and APE8901 from damages during overload or short circuit conditions.
the UVP is disabling during soft-start. When the voltage on FB pin falls below the under-voltage
threshold, the UVP circuit shuts off the output immediately. After a while, the APE8901 starts a
new soft-start to regulate output.
temperature exceeds +150°C, a thermal sensor turns off the output NMOS, allowing the device to
cool down. The regulator regulates the output again through initiation of a new soft-start cycle after
the junction temperature cools by 40°C, resulting in a pulsed output during continuous thermal
overload conditions. The thermal shutdown designed
The APE8901 monitors the current via the output NMOS and limits the maximum current to
The APE8901 monitors the voltage on FB pin after soft-start process is finished. Therefore
A thermal shutdown circuit limits the junction temperature of APE8901. When the junction
Output of the regulator. Please connect Pin 6 using wide tracks. It is necessary to connect
A Power-On-Reset (POR) circuit monitors both input voltages at VCNTL and VIN pins to
An internal soft-start function controls rise rate of the output voltage to limit the current
An error amplifier working with a temperature compensated 0.8V reference and an output
APE8901
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