The RT8249A/B/C is a dual-channel step-down, controller generating supply voltages for battery-powered systems. It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/3.3V linear regulators. Each linear regulator provides up to 100mA output current and 3.3V linear regulator provides 1% accuracy under 35mA. The R.
include on-board power-up sequencing, a power-good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown. A constant current ripple PWM control scheme operates without sense resistors and provides 100ns response to load transient. For maximizing power efficiency, the R.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | RT8249A |
Richtek |
Dual-Channel Synchronous DC/DC Step-Down Controller | |
2 | RT8249B |
Richtek |
Dual-Channel Synchronous DC/DC Step-Down Controller | |
3 | RT8249D |
Richtek |
Dual-Channel Synchronous DC/DC Step-Down Controller | |
4 | RT8240A |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller | |
5 | RT8240B |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller | |
6 | RT8240C |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller | |
7 | RT8241 |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller | |
8 | RT8241E |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller | |
9 | RT8243A |
Richtek |
Main Power Supply Controller | |
10 | RT8243B |
Richtek |
Main Power Supply Controller | |
11 | RT8243C |
Richtek |
Main Power Supply Controller | |
12 | RT8248A |
Richtek |
Complete DDR Memory Power Supply Controller |