Description
SY8843/SY8843L High Efficiency 1.5MHz, 3A Ultra Fast Dynamic Response Synchronous Step Down Regulator ` General .
The SY8843 and SY8843L are high efficiency 1.
Features
* 2.7~5.5V Input Voltage Range
* 65µA Low Quiescent Current
* Ultra Fast Load Transient Speed
* Low RDS(ON) for Internal Switches (Top/Bottom)
85mΩ /50mΩ
* High Switching Frequency 1.5MHz Minimizes
the External Components
* Internal Soft-start Limits the Inrush Current
Applications
* Smart Phone
* LCD TV
* Set Top Box
* Mini-notebook PC
* Access Point Router
Typical Applications
VIN : 2.7V~5.5V
CIN
22µF/6.3V
5 RPG: 100k
3
4
SY8843/SY8843L L:0.68µH
6
IN
LX
2
PG
OUT
1
EN
FB
GND 7
RH: 100k
RL: 49.9k
VOUT:1.8V
COUT
22µF/6.3V
Figure1. Schematic