R5540 Series
Nch Load Switch IC
Description
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(PL)1010-4F package called a flip chip is available.
Spec
| Standard | |
|---|---|
| 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. 0.1 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(PL)1010-4F |
| Built-in Over-current Sensing Function | Code 002: Typ. 350 mA Code 004: Typ. 700 mA |
Protections / Functions
| TSD | Reverse | OCP | UVLO | OVLO | Soft Start | PGOOD | Auto Discharge | Reset |
|---|---|---|---|---|---|---|---|---|
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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 |
Technical Documents
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Typical Application
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Output Voltage vs. Output Current
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| R5540Kxxxx-TR |
|
DFN(PL)1010-4F | R5540K | R5540K |
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
FAQ
Buy / Contact
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Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
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Available from 1 piece!Our electronic device products are available through our authorized online distributors.
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Technical Support