AP7176BMP-13 Diodes Inc., AP7176BMP-13 Datasheet - Page 11

• Manufacturer Part Number: AP7176BMP-13
• Description: Low Dropout Controllers - LDO 3A ULTRA LDO LINEAR REG
• Manufacturer: Diodes Inc.

Specifications of AP7176BMP-13

• Rohs: yes

AP7176B
Application Information
(cont.)
Output Capacitor
An output capacitor (C
) is needed to improve transient response and maintain stability. The ESR (equivalent series resistance) and
OUT
capacitance drives the selection. Care needs to be taken to cover the entire operating temperature range.
The output capacitor can be an Ultra-Low-ESR ceramic chip capacitor or a low ESR bulk capacitor like a solid tantalum, POSCap or aluminum
electrolytic capacitor.
C
is used to improve the output stability and reduces the changes of the output voltage during load transitions. The slew rate of the current
OUT
sensed via the FB pin in AP7176B is reduced. 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
To prevent the input voltage from dropping during load steps it is recommended to utilize an input capacitor (C
). As with the output capacitor
IN
the following are acceptable, Ultra-Low-ESR ceramic chip capacitor or low ESR bulk capacitor like a solid tantalum, POSCap or aluminum
electrolytic capacitor. Typically it is recommended to utilize an capacitance of at least 10µF to avoid output voltage drop due to reduced input
voltage. The value can be lower if V
changes are not critical for the application.
IN
AP7176B
11 of 15
December 2012
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© Diodes Incorporated
Document number: DS35818 Rev. 2 - 2