AP7348 4 CHANNEL 300mA HIGH PSRR LOW NOISE LDO WITH ENABLE Description Pin Assignments The AP7348 is a 4 channel low dropout regulator with high output voltage accuracy, low R , high PSRR, low output noise and low DS(ON) (Top View) quiescent current. This regulator is based on a CMOS process. The AP7348 includes two voltage references, and four channels with each having an error amplifier, foldback current limiting, a discharge circuit and an independent resistor network to determine the fixed output voltage. The over temperature sensing is for each channel with all 4 channel being disabled during a temperature fault condition. The device has two enable inputs with EN1 controlling both V and OUT1 V leaving V and V to be controlled by EN2. During OUT3 OUT2 OUT4 disable the two associated channels will discharge. With its low power consumption and line and load transient response, the AP7348 is well suited for low power handheld communication equipment. X1-DFN1612-8 (Type B) The AP7348 is provided in the X1-DFN1612-8 (Type B) package allowing for a small footprint and a dense PCB layout. Applications Features Smart Phone/Tablet Low V and Wide V Range: 1.7V to 5.25V DD DD WIFI Access Points Each Channel Output Current: 300mA Communication Module V Accuracy 1% OUT Camera Module, Appliances Ripple Rejection 75dB at 1kHz RF Supply for IOT/LPWAN Low Output Noise, 60Vrms from 10Hz to 100kHz Total 4 Channel Quiescent Current is Typically 160A V Fixed 1.2V to 3.6V OUT Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. AP7348 Typical Applications Circuit V V V V IN OUT1 OUT1 DD C OUT1 C IN 1F 4.7F ON V OUT2 V EN1 OUT2 AP7348 OFF C OUT2 1F ON V OUT3 V OUT3 EN2 OFF C OUT3 1F V OUT4 V OUT4 GND C OUT4 1F Pin Descriptions Pin Number Pin Name Function 1 GND Ground 2 V Channel 3 Output Voltage Pin OUT3 3 V Channel 4 Output Voltage Pin OUT4 Enable Pin to control CH2&CH4 4 EN2 This pin should be driven either high or low. Driving this pin high enables the regulator, while pulling it low puts the regulator into shutdown mode 5 V Channel 2 Output Voltage Pin OUT2 6 V Power Input Pin DD 7 V Channel 1 Output Voltage Pin OUT1 Enable Pin to control CH1&CH3 8 EN1 This pin should be driven either high or low. Driving this pin high enables the regulator, while pulling it low puts the regulator into shutdown mode This pad must be connected for thermal dissipation. Electrically it may be left open or connected to Thermal Pad Ground. This does not replace the connection that is required for pin 1. 2 of 15 AP7348 August 2020 Diodes Incorporated www.diodes.com Document number: DS42124 Rev. 3 - 2