R5543 Series
18mΩ ON Resistance 3A Load Switch IC
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Description
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(PL)1216-6G package which achieve the smallest possible footprint solution on boards where area is limited.
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Spec
Consumer 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) Internal FET Nch Package DFN(PL)1216-6G VBIAS Input Voltage Range (Maximum Rating) 2.5 V to 5.5 V (6.0 V) Thermal Shutdown 145°C Protections / Functions
TSD Reverse OCP UVLO OVLO Soft Start PGOOD Auto Discharge Reset -
Technical
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Typical Application
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Switch On Resistance vs. Temperature
VBIAS = 5.0 V, IOUT = 500 mA
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VOUT Output Voltage On Time vs. Delay Capacitance
VIN = 3.6 V, VBIAS = 5.5 V, RLOAD = 10 Ω, COUT = 0.1 µF, Ta = 25°C
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability R5543K001x-E2 DFN(PL)1216-6G R5543K R5543K - 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.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Functional Description
TSD | Thermal Shutdown Function |
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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 |