Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes

AN813

Title:
Applying the TC1219/TC1220 Inverting Charge Pumps with Small External Capacitor Values
Name:
AN813
Date:
09/17/2004
Author:
Patrick Maresca
Description:
In many cases where a negative DC bias source is required, lower output load currents (15 mA or less) and faster shutdown times are what the design engineer optimally needs. For applications such as these, the TC1219 and TC1220 can be applied with lower value external capacitors than those recommended in the device data sheet. The data in this Application Note shows measurements taken on both the TC1219 and TC1220 using five different, smallervalue external capacitors: a) 2.2 µF, b) 1 µF, c) 0.47 µF, d) 0.22 µF and e) 0.1 µF. All measurements were made with a 5V input (at the VIN pin) and at ambient temperature TA = +25°C.
Keywords:
charge pump,switched capacitor,negative supply,portable,power,battery
 
Application Notes & Source Code
 Last Updated
Size
 
  AN813
  09/17/2004
  332KB
Silicon Products