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The AP2112 is CMOS process low dropout linear regulator with enable function, the regulator delivers a guaranteed 600mA (min.) continuous load current. The AP2112 provides 1.2V, 1.8V, 2.5V, 2.6V, 2.8V and 3.3V regulated output and 0.8V to 5V adjustable output, and provides excellent output accuracy ±1.5%, also provides an excellent load regulation, line regulation and excellent load transient performance due to very fast loop response. The AP2112 has built-in auto discharge function.


  • Laptop computer
  • Potable DVD
  • LCD Monitor


  • Output Voltage Accuracy: ±1.5%
  • Output Current: 600mA (Min.)
  • Foldback Short Current Protection: 50mA
  • Enable Function to Turn ON/OFF VOUT
  • Low Dropout Voltage (3.3V): 250mV (Typ.) @IOUT = 600mA
  • Excellent Load Regulation: 0.2%/A (Typ.)
  • Excellent Line Regulation: 0.02%/V (Typ.)
  • Low Quiescent Current: 55μA (Typ.)
  • Low Standby Current: 0.01μA (Typ.)
  • Low Output Noise: 50μVRMS
  • PSRR: 100Hz -65dB, 1kHz -65dB
  • OTSD Protection
  • Stable with 1.0μF Flexible Cap: Ceramic, Tantalum and Aluminum Electrolytic
  • Operation Temperature Range: -40°C to 85°C
  • ESD: MM 400V, HBM 4000V

Product Specifications

Product Parameters

Features High PSRR
IOUT 0.6 A
VIN (Max) 6 V
VIN (Min) 2.5 V
VOUT 3.3, 2.5, 1.8, 1.2, ADJ(0.8) V
IQ 55 µA
PSRR 65 dB
VDROPOUT (Max) 1.3 V
Operating Temperature (Ambient) -40 to 85
Enable Active H
Channels 1

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Quality & Reliability

Technical Documents

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AP2112K-1.8TRG1 Mouser Electronics Inc. 3640 6/20/2019 Buy Now Americas
AP2112K-1.8TRG1 Digi-Key Electronics 29 6/19/2019 Buy Now Americas
AP2112K-1.8TRG1 Future Electronics 3000 6/19/2019 Buy Now Americas
AP2112K-2.5TRG1 Mouser Electronics Inc. 1250 6/20/2019 Buy Now Americas
AP2112K-3.3TRG1 Mouser Electronics Inc. 33755 6/20/2019 Buy Now Americas
AP2112K-3.3TRG1 Avnet 3000 6/19/2019 Buy Now Americas
AP2112K-3.3TRG1 Avnet Asia 9000 6/19/2019 Buy Now Asia Pacific
AP2112K-3.3TRG1 Digi-Key Electronics 91068 6/19/2019 Buy Now Americas
AP2112K-3.3TRG1 Future Electronics 2264 6/19/2019 Buy Now Americas
AP2112K-3.3TRG1 Future Electronics 84000 6/19/2019 Buy Now Americas
AP2112M-3.3TRG1 Mouser Electronics Inc. 4000 6/20/2019 Buy Now Americas
AP2112M-3.3TRG1 Digi-Key Electronics 1227 6/19/2019 Buy Now Americas
AP2112R5-3.3TRG1 Mouser Electronics Inc. 992 6/20/2019 Buy Now Americas
AP2112R5A-3.3TRG1 Mouser Electronics Inc. 468 6/20/2019 Buy Now Americas


Product Change Notices

PCN # Issue Date Subject
PCN-2246 2017-28-06 Additional Qualified Assembly/Test (A/T) Site – Chengdu A/T (CAT) with Part Marking Update
PCN 2308 2017-22-12 Additional FAB Source (Chipbond LH), and Assembly/Test Site (SAT/Unisem) on Select Devices