The R5540 series are N-channel Load Switch ICs with the low supply current, Typ. 9µA. By using an Nch transistor as a driver transistor, the features of low on resistance and the reverse current protection at off state are realized in these ICs. The gate voltage of the N-channel transistor is supplied from the internal step-up circuit. The R5540 is an ideal switch to supply the power from the secondary power source such as the output of a step-down DC/DC to the load circuit. Since the package for the R5540 is the ultra small-sized DFN(PLP)1010-4F, high density mounting on board is possible.
The Ricoh R5540 series are N-channel load switch ICs designed with low supply current (Typ. 9µA) and reverse current protection. These ICs utilize an internal N-channel MOSFET and a step-up circuit to drive the gate, making them ideal for supplying power from secondary sources like step-down DC/DC converters to load circuits. The series is available in an ultra-small DFN(PLP)1010-4F package to enable high-density mounting.
| Supply Current (Operation) | Typ. 9µA |
|---|---|
| Supply Current (Standby) | Typ. 0.7µA |
| Switch ON Resistance | Typ. 120mΩ |
| Output Current (Code 002) | 200mA |
| Output Current (Code 004) | 450mA |
| Current Limit (Code 002) | Typ. 350mA |
| Current Limit (Code 004) | Typ. 700mA |
| Package Type | DFN(PLP)1010-4F |
| Operating Temperature | -40 to 85 °C |
The input voltage range for Code 002 is 0.75V to 3.6V.
The input voltage range for Code 004 is 0.8V to 3.6V.
Yes, the R5540K series includes a built-in soft-start function.