Build with AP2112 — Datasheet Specs & AI Design Help

00 — Overview

What the AP2112 does

The AP2112 is a 600mA CMOS low dropout linear regulator with an enable function, available in fixed output voltages of 1.2V, 1.8V, 2.5V, 2.6V, and 3.3V. It operates with a single supply of 2.5V to 6.0V, featuring a typical dropout voltage of 250mV at full load. The device maintains output accuracy within ±1.5% and consumes only 55µA quiescent current. It includes foldback short circuit protection, thermal shutdown, and auto discharge functionality. The AP2112 supports SOT25, SOT89-5, and SO-8 packages, making it suitable for laptop computers, LCD monitors, and portable DVD players across commercial and industrial temperature ranges.

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Start building with AP2112 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for AP2112
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	55 µA	80 µA	VIN = 2.5V, IOUT = 0mA; iq; Electrical Characteristics	Diodes datasheet, p. 4 — Electrical Characteristics
output voltage	—	1.2 V	—		Diodes datasheet, p. 12 — Application Note
output current	600 mA	—	—	VIN = 2.5V, VOUT = 1.182V to 1.218V; iout(max); Electrical Characteristics	Diodes datasheet, p. 4 — Electrical Characteristics
supply voltage range	2.5 V	—	6 V	vin; Recommended Operating Conditions	Diodes datasheet, p. 3 — Recommended Operating Conditions
operating temperature	-40 °C	—	85 °C	ta; Recommended Operating Conditions	Diodes datasheet, p. 3 — Recommended Operating Conditions
standby current	—	10 nA	1 µA	VIN = 2.5V, VENin OFF mode; istd; Electrical Characteristics	Diodes datasheet, p. 4 — Electrical Characteristics
psrr	—	65 dB	—	f = 100Hz; psrr; Electrical Characteristics	Diodes datasheet, p. 4 — Electrical Characteristics
dropout voltage	—	1 V	1.3 V	IOUT = 10mA; vdrop; Electrical Characteristics	Diodes datasheet, p. 4 — Electrical Characteristics
output noise voltage	—	50 µV	—	No Load, 10Hz ≤ f ≤ 100kHz; vnoise; Electrical Characteristics	Diodes datasheet, p. 4 — Electrical Characteristics
output count	—	1	—		Diodes datasheet, p. 2 — Pin Descriptions

02 — Alternatives

Closest matches to AP2112

AP2127-1.0 10.0× higher standby current, 1.4× higher dropout voltage, 1.3× lower output current

AP2127-3.3 10.0× higher standby current, 2.8× higher output voltage, 1.4× higher dropout voltage

RT9193-1.5 5.9× lower dropout voltage, 2.0× lower output current, 2.0× higher output noise voltage

RT9080 10.0× higher standby current, 4.7× lower supply voltage range, 1.9× lower output noise voltage

TLV758P 10.0× higher standby current, 2.5× higher output voltage, 2.2× lower quiescent current

RT9078N-08GJ5 10.0× higher standby current, 1.9× higher operating temperature, 1.8× higher output voltage

RT9013-1.2 6.2× lower dropout voltage, 2.2× lower quiescent current, 1.7× lower output noise voltage

TLV757P 3.0× higher output noise voltage, 2.6× higher output current, 2.3× higher output voltage

03 — FAQ

Frequently asked questions

What is the dropout voltage of the AP2112?

The dropout voltage is 1 V at IOUT = 10mA.

What is the maximum operating temperature (ta) under Recommended Operating Conditions?

The operating temperature (ta) is 85 °C.

What is the output count for the AP2112?

The output count is 1.

What is the output current (iout(max)) when VIN = 2.5V and VOUT is between 1.182V and 1.218V?

The output current is 600 mA.

What is the output noise voltage under No Load conditions from 10Hz to 100kHz?

The output noise voltage is 50 µV.

What is the output voltage of the AP2112?

The output voltage is 1.2 V.

What is the PSRR at f = 100Hz?

The PSRR is 65 dB at f = 100Hz.

What is the quiescent current when VIN = 2.5V and IOUT = 0mA?

The quiescent current is 55 µA.

What is the standby current (istd) when VIN = 2.5V and VENin is in OFF mode?

The standby current is 10 nA.

What is the supply voltage range for the AP2112?

The supply voltage range is 6 V at vin under Recommended Operating Conditions.