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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 | RT8249B |
Richtek |
Dual-Channel Synchronous DC/DC Step-Down Controller |
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| 2 | RT8249C |
Richtek |
Dual-Channel Synchronous DC/DC Step-Down Controller |
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| 3 | RT8249D |
Richtek |
Dual-Channel Synchronous DC/DC Step-Down Controller |
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| 4 | RT8240A |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller |
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| 5 | RT8240B |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller |
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| 6 | RT8240C |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller |
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| 7 | RT8241 |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller |
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| 8 | RT8241E |
Richtek |
High Efficiency Single Synchronous Buck PWM Controller |
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| 9 | RT8243A |
Richtek |
Main Power Supply Controller |
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| 10 | RT8243B |
Richtek |
Main Power Supply Controller |
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| 11 | RT8243C |
Richtek |
Main Power Supply Controller |
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| 12 | RT8248A |
Richtek |
Complete DDR Memory Power Supply Controller |
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