The RT8228A PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The constant on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “ins.
Built in 1% 0.5V Reference Voltage
Adjustable 0.5V to 3.3V Output Range
Quick Load Step Response within 100ns
4700ppm/°C Programmable Current Limit by Low
Side RDS(ON) Sensing
4.5V to 26V Battery Input Range
Resistor Programmable Frequency
Internal Ramp Current Limit Soft-Start Control
Drives Large Synchronous Rectifier FETs
Integrated Boost Switch
Over/Under Voltage Protection
Thermal Shutdown
Power Good Indicator
RoHS Compliant and Halogen Free
Applications
Notebook Computers
CPU Core Supply
Chipset/RAM Supply as Low as 0.5V
Generic DC/DC Power Regulator
Pin.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | RT8228B |
Richtek |
Single Synchronous Buck PWM Controller | |
2 | RT8223A |
Richtek |
Main Power Supply Controller | |
3 | RT8223B |
Richtek |
Main Power Supply Controller | |
4 | RT8223L |
Richtek |
Main Power Supply Controller | |
5 | RT8223M |
Richtek |
Main Power Supply Controller | |
6 | RT8223N |
Richtek |
Main Power Supply Controller | |
7 | RT8223P |
Richtek |
Main Power Supply Controller | |
8 | RT82 |
LRC |
AUTOMOTIVE BRIDGE RECTIFIERS | |
9 | RT8202 |
Richtek |
Single Synchronous Buck Controller | |
10 | RT8202A |
Richtek |
Single Synchronous Buck Controller | |
11 | RT8202B |
Richtek |
Single Synchronous Buck Controller | |
12 | RT8202L |
Richtek |
(RT8202L/M) Single Synchronous Buck Controller |