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R5540 Series

Nch Load Switch IC

  • Consumer
  • PLP
  • RoHS

The R5540 Series are CMOS-based load switch IC. 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 converter to the load circuit. Due to a built-in N-channel transistor with low on-resistance of 120mΩ, R5540 provides a low dropout voltage. In addition to a peak current limit circuit, R5540 has a short current limit circuit and a soft start function. Due to a reverse current protection circuit, R5540 prevent a reverse current at off state.

Besides the low supply current by CMOS, the R5540 has low voltage with an input voltage from 0.75V (002) and 0.8V (004). Accordingly, the device supports highly integrated, low voltage-driven LSI as a rear stage of the DC/DC converter. Standby mode and auto-discharge function are also available. A 1mm square DFN(PLP)1010-4F package called a flip chip is available.

Specs & Datasheets

  Consumer
Input Voltage Range Code 002: 0.75 V to 3.6 V (5.0 V)
Code 004: 0.8 V to 3.6 V (5.0 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 9 µA (IOUT = 0 mA)
Standby Current Typ. 0.7 µA
Output Current Code 002: Min. 200 mA
Code 004: Min. 450 mA
ON-resistance Typ. 120 mΩ (VIN = 1.2 V)
Internal FET Nch
Package DFN(PLP)1010-4F
Built-in Over-current Sensing Function Code 002: Typ. 350 mA
Code 004: Typ. 700 mA

Download Datasheet

Protections / Functions

Functional Description

TSD Reverse OCP UVLO OVLO Soft Start PGOOD Auto Discharge Reset
         

Technical Documents

Typical Application

Typical Application

Output Voltage vs. Output Current

Output Voltage vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
R5540Kxxxx-TR
  • gradeConsumerC
  • plpP
DFN(PLP)1010-4F R5540K R5540K

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Please contact us or our distributors for unpublished reliability information.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

Search for similar products under conditions below.

Category:Switch ICs

Features Load SW
VIN
min (V)
0.75
VIN
max (V)
3.6
ON Resistance
(mΩ)
120
IOUT
(mA)
450