Description
Application Note: AN_SY8089/SY8089A High Efficiency 5.5V, 2A continuous, 3A peak, 1MHz Synchronous Step Down Regulator General .
The SY8089 and SY8089A are high-efficiency, high frequency synchronous step-down DC-DC regulator IC capable of delivering up to 2A output current.
Features
* Low RDS(ON) for internal switches (top/bottom):110mΩ/80mΩ
* 2.7-5.5V input voltage range
* 2A continuous, 3A peak load current capability
* 1MHz switching frequency minimizes the external
components
* Internal softstart limits the inrush current
* Re
Applications
* LCD TV
* Set Top Box
* Net PC
* Mini-Notebook PC
* Access Point Router
Typical Applications
Efficiency (%)
VIN: 2.7-5.5V 4 IN
3 L1:2.2µH LX
VOUT: 1.8V
ON/ OFF
CIN 22µF
1
FB 5 EN
GND 2
R1 200k
C1
COUT
22pF 22µFх2
R2 100k
Figure 1.Schematic diagr