mic4684 Micrel Semiconductor, mic4684 Datasheet - Page 8

• Manufacturer Part Number: mic4684
• Description: Mic4684 2a High-efficiency Buck Regulator
• Manufacturer: Micrel Semiconductor

MIC4684
Functional Characteristics
Frequency Foldback
The MIC4684 folds the switching frequency back during a hard short
circuit condition to reduce the energy per cycle and protect the device.
M9999-021705
Switching Frequency Foldback
200kHz
70kHz
TIME
Normal
Operation
Short
Circuit
Operation
8
V
V
I
OUT
IN
OUT
= 12V
= 1.0A to 0.1A
= 5V
Load Transient
TIME (100ms/div.)
February 2005
Micrel, Inc
5.1V
5V
1A
0A