Diodes Incorporated
SO 8

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AP2318A (Not Recommended for new design)

NRND = Not Recommended for New Design

1A ULDO Regulator with ENABLE

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The AP2318A is a series of ultra low dropout regulators optimized for low voltage applications where transient response and minimum input voltage are critical. The AP2318A provides current limit and thermal shutdown function. Its circuit includes a trimmed bandgap reference to assure output voltage accuracy to be within ±1.5%. On-chip thermal shutdown provides protection against any combination of overload and ambient temperatures that would cause excessive junction temperatures. The AP2318A has adjustable version, which can set the output voltage through two external resistors.


· Wide Operating Voltage Range: 2.5V to 12V · Output Voltage Accuracy: ±1.5% · On-chip Thermal Shutdown · ESD Rating: 3000V (Human Body Model) 600V (Machine Model) · Operation Junction Temperature: -40C to 125C


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Product Specifications

Product Parameters

Accuracy 25C 1.50%
Adj. Vout (V) 2.5 to 12
Adjust VFB 1.25
Adj. Vout 2.5,12
Adjustable VFB (V) 1.25
Automotive Complianat and PPAP capable no
Channels 1
Compliance (Only Automotive supports PPAP) Standard
Enable Active H
Features High current
Iout (A) 1
IQ (mA) 250
Iq (max) (µA) 400
Iq (max) (µA) 400
Iq (max) (µA) 250
Iq (typ) (µA) 250
Iq (typ) (µA) 250
Noise uV RMS 10-100 kHz 396
Operating Temperature (Ambient) (°C) -40 to 85
Output Discharge no
Output options Adjustable
PSRR (dB) 1K Hz 65
PSRR (dB) 1kHz 65
VCTL Function no
VDROPOUT (Max) 0.5
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.5
VDROPOUT (Max) (V) at Max Current and Max Voltage 0.5
VDROPOUT (Max)(V) at Max Current and Max Voltage 0.5
VIN (Max) 13.2
Vin (Max) (V) 13.2
VIN (Min) 2.5
Vin (Min) (V) 2.5
VOUT ADJ(1.25)
Vout (max) 13.2
Vout (min) 1.25

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2492 2020-11-04 2021-05-04 Device End of Life (EOL)