AP7344 Datasheet, PDF (2/15 Pages) Diodes Incorporated – DUAL 300mA HIGH PSRR LOW NOISE LDO WITH ENABLE

Pin Descriptions
Pin Number
GND
VOUT1
VOUT2
EN2
VIN2
VIN1
EN1
–
AP7344
Pin Name
1, 4
2
3
5
6
7
8
Thermal PAD
Function
Ground
Channel 1 Output Voltage pin
Channel 2 Output Voltage pin
Chanel 2 Enable pin. This pin should be driven either high or low and must not
be floating. Driving this pin high enables channel 2 output, while pulling it low
puts Chanel 2 regulator into shutdown mode.
Input Voltage pin
Input Voltage pin
Chanel 1 Enable pin. This pin should be driven either high or low and must not
be floating. Driving this pin high enables channel 1 output, while pulling it low
puts Chanel 1 regulator into shutdown mode.
In PCB layout, prefer to use large copper area to cover this pad for better
thermal dissipation, then connect this area to GND or leave it open. However do
not use it as GND electrode function alone.
Functional Block Diagram
VIN1
EN1
VIN2
EN2
Error Amp.
Vref
R1_1
R2_1
Current Limit
VOUT1
GND
Error Amp.
Vref
R1_2
R2_2
Current Limit
VOUT2
AP7344 (No Discharge)
VIN1
EN1
VIN2
EN2
Error Amp.
Vref
R1_1
R2_1
Current Limit
VOUT1
GND
Error Amp.
Vref
R1_2
R2_2
Current Limit
VOUT2
AP7344 (With Discharge)
AP7344
Document number: DS37368 Rev. 1 - 2
2 of 15
www.diodes.com
January 2015
© Diodes Incorporated