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The R5543 Series is a CMOS-based dual supply voltage load switch IC. The R5543 Series 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 18 mΩ ON resistance allows the R5543 Series 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 R5543 Series 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.
Specs & Datasheets
|Input Voltage Range||0.6 V to 4.8 V (5.5 V)|
|Operating Temperature Range||Tj = -40°C to 105°C (125°C)|
|Supply Current||Typ. 25 µA (IOUT = 0 mA)|
|Standby Current||Typ. 0.01 µA|
|Output Current||Max. 3 A|
|ON-resistance||18 mΩ (VIN = 1.0 V, VBIAS = 5.0 V)|
|VBIAS Input Voltage Range (Maximum Rating)||2.5 V to 5.5 V (6.0 V)|
|TSD||Reverse||OCP||UVLO||OVLO||Soft Start||PGOOD||Auto Discharge||Reset|
Quality & Packages
Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.
Sample / Buy
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
|TSD||Thermal Shutdown Function|
|Reverse Current Protection||Reverse Current Protection|
|UVLO||Undervoltage Lockout Protection|
|OVLO||Overvoltage Lockout Protection|
|Soft Start||Soft Start Function|
|PGOOD||Power Good Output|
|Auto Discharge||Auto Discharge Circuit|