AP7315

Document number: DS38352 Rev. 1 - 2

11 of 23

www.diodes.com

December 2015

© Diodes Incorporated

AP7315

Application Information

Output Capacitor

capacitors. The ESR (equivalent series resistance) and capacitance drives the selection. If the application has large load variations, it is

recommended to utilize low-ESR bulk capacitors. It is recommended to place ceramic capacitors as close as possible to the load and the ground

pin and care should be taken to reduce the impedance in the layout.

Input Capacitor

Enable Control

to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and

below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section.

Short Circuit Protection

protects the regulator from over-current and damage due to overheating.

Layout Considerations

regulator GND pin should be connected to the external circuit ground to reduce voltage drop caused by trace impedance. Ground plane is generally

ESR vs. Output Current

Ceramic type output capacitor is recommended for this series; however, the other output capacitors with low ESR also can be used. The relations

Measurement conditions:

Frequency Band: 10Hz to 2MHz, Temperature: -40°C to +85°C

0.001

0.01

0.1

1

10

100

0

25

50

75

100

125

150

Output Current I

ESR vs. Output Current

AP7315-18

-40°C

85°C

Stable Range

0.001

0.01

0.1

1

10

100

0

25

50

75

100

125

150

Output Current I

ESR vs. Output Current

AP7315-33

-40°C

85°C

Stable Range