Diodes Incorporated

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300MA High Speed, Extremely Low Noise CMOS LDO Regulator

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The AP2126 series are positive voltage regulator ICs fabricated by CMOS process. The AP2126 series have features of low dropout voltage, low noise, high output voltage accuracy, and low current consumption which make them ideal for use in various battery-powered devices. AP2126 is available in 1.25V to 5.5V adjustable voltage versions. AP2126 series are available in SOT-23-5 Package.


· Wide Operating Voltage: 3.0V to 6V · High Output Voltage Accuracy: ±2% · High Ripple Rejection: 68dB@ f = 1kHz, 54dB@ f = 10kHz · Low Standby Current: 0.1μA · Low Dropout Voltage: 170mV@300mA for VOUT=3.3V, 140mV@300mA for VOUT = 5.2V · Low Quiescent Current: 60μA Typical · Low Output Noise: 80μVrms@VOUT = 1.25V · Short Current Limit: 50mA · Over Temperature Protection · Compatible with Low ESR Ceramic Capacitor: 1μF for CIN and COUT · Excellent Line/Load Regulation · Soft Start Time: 50μs · Auto Discharge Resistance: RDS(ON) = 60Ω


· Datacom · Notebook Computers · Mother Board

Product Specifications

Product Parameters

Iq (max) (µA) 90
Iq (typ) (µA) 60
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Type LDO
Output options Adjustable
Iout (A) 0.3
Vin (Max) (V) 6
Vin (Min) (V) 3
Vout (min) 1.25
Vout (max) 3.3
Adjustable VFB (V) 1.25
Accuracy 25C 2
Noise uV RMS 10-100 kHz 80
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.17
PSRR (dB) 1kHz 68
Operating Temperature (Ambient) (°C) -40 to 85
Enable Active Yes (High)
Channels 1
Output Discharge Yes
Power Good No
Reverse Protection No
VCTL Function No

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