Low ON Resistance Nch Load Switch IC
The R5541K is a CMOS-based dual supply voltage load switch IC. The R5541K is an ideal switch for supplying the power from the secondary power source such as the output of a step-down DC/DC converter to the load circuit. A built-in Nch. transistor with typically 18mΩ ON resistance allows the R5541K to provide a low dropout voltage and prevents the reverse current during shutdown mode. Internally, a single IC consists of an internal voltage step-up circuit, a soft-start circuit, a thermal shutdown circuit, a chip enable circuit and a UVLO circuit.
The gate voltage of Nch. driver transistor is supplied by a soft-start circuit. The soft-start circuit is supplied by the external power source (VBIAS). Soft-start time is adjustable by connecting an external capacitor.
The R5541K is offered in an ultra-small 6-pin DFN(PLP)1216-6G package which achieve the smallest possible footprint solution on boards where area is limited.
|Supply Current||Typ. 25 µA (IOUT = 0mA)|
|Standby Current||Typ. 0.01 µA|
|VIN Input Voltage Range||0.6 V to 4.8 V|
|VBIAS Input Voltage Range||2.5 V to 5.5 V|
|Switch ON Resistance||Typ. 18 mΩ (VIN = 1.0 V, VBIAS = 5.0 V)|
|Output Current||Max. 3 A|
|A single Nch MOSFET Circuit|
|Thermal Shutdown Circuit|
|Auto-discharge Function (R5541K001D)|
- ・Secondary Power Source for hand-held communication equipments and laptop PCs
|Data Sheet||Flyer||Package Info.||Quality Assurance Data|
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