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R5541 Series

18mΩ ON Resistance 3A Load Switch IC

  • Consumer
  • PLP
  • RoHS

The R5541 Series are CMOS-based dual supply voltage load switch ICs. The R5541 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 N-channel driver transistor with typically 18 mΩ ON resistance allows the R5541 to provide a low dropout voltage. The R5541 includes a soft-start circuit, a thermal shutdown circuit, a reverse current protection circuit (at off state), and a UVLO circuit.

Besides the low supply current by CMOS, the R5541 has low voltage with an input voltage from 0.6 V. Accordingly, the device supports on the distribution of low voltage power supply system. An ultra-small 6-pin DFN(PLP)1216-6G package is available.

Specs & Datasheets

Input Voltage Range 0.6 V to 4.8 V (5.5 V)
Operating Temperature Range -40°C to 85°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)
Internal FET Nch
Package DFN(PLP)1216-6G
VBIAS Input Voltage Range (Maximum Rating) 2.5 V to 5.5 V (6.0 V)
Thermal Shutdown 145°C

Download Datasheet

Protections / Functions

Functional Description

TSD Reverse OCP UVLO OVLO Soft Start PGOOD Auto Discharge Reset

Technical Documents

Typical Application

Typical Application

Switch On Resistance vs. VIN Input Voltage

Switch On Resistance vs. VIN Input Voltage

VOUT Output Voltage On Time vs. DELAY Capacitance

VOUT Output Voltage On Time vs. DELAY Capacitance

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
DFN(PLP)1216-6G R5541K R5541K

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Please contact us or our distributors for unpublished reliability information.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

Functional Description

TSD Thermal Shutdown Function
Reverse Current Protection Reverse Current Protection
OCP Overcurrent Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Soft Start Soft Start Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Circuit

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Category:Switch ICs

Features Load SW
min (V)
max (V)
ON Resistance