Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM22680 2A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Features |
568 Kbytes |
12-Dec-08 |
Download |
LM22680 2A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Features (Japanese)
 |
668 Kbytes |
|
 |
Package Availability, Models, Samples & Pricing
General Description
The LM22680 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down
(buck) switching regulator capable of driving up to 2A loads with excellent line and load regulation characteristics. High
efficiency (>90%) is obtained through the use of a low ON-resistance N-channel MOSFET.
The SIMPLE SWITCHER
® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH
® design tool. National’s WEBENCH
® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards
for easy design-in. The switching clock frequency is provided by an internal fixed frequency oscillator which operates at
500 kHz. The switching frequency can also be adjusted with an external resistor or synchronized to an external clock up to
1MHz. It is also possible to self-synchronize multiple regulators to share the same switching frequency. The LM22680 series
also has built in thermal shutdown, current limiting and an enable control input that can power down the regulator to a low
25 µA quiescent current standby condition. An adjustable soft-start feature is provided by selecting an appropriate external
soft-start capacitor.
Design Tools
| Title | Size in Kbytes |
Date |
 |
|
|
| Downloadable LM2267x, LM22680 Quick Start Simple Switcher Component Calculator |
1413 Kbytes |
12-Jan-2009 |
View |
|
|
Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1911: Application Note 1911 LM22680 Evaluation Board |
407 Kbytes |
12-Dec-08 |
Download |
| AN-1930: Application Note 1930 SIMPLE SWITCHER® Regulators Take Over Automotive Applications |
85 Kbytes |
7-Jan-09 |
Download |
[Information as of 5-Jul-2009]
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