NCP114AMX330TCG

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1. Describe

The NCP114 is a 300 mA LDO that provides engineers with very Stable, accurate voltage and low noise for space-constrained environments, noise sensitive applications. Optimize performance battery powered portable applications, the NCP114 uses Dynamic Quiescent Current Scaling for Very Low IQ Consumption empty.

2. Feature

    1. Operating input voltage range: 1.7 V to 5.5 V

    2. Fixed voltage options available: 0.75 V to 3.6 V Contact factory for other voltage options

    3. Very low typical quiescent current. 50A

    4. Standby Current Consumption: Typical. 0.1 A

    5. Low dropout: 135 mV typical at 300 mA

    6. ±1% accuracy at room temperature

    7. High power supply ripple rejection: 75 dB at 1 kHz

    8. Thermal shutdown and current limit protection

    9. Stable with 1 F ceramic output capacitor

  10. Available in UDFN and TSOP packages

  11. These are lead-free devices

3. Application

    1. PDA, cell phone, GPS, smartphone

    2. Wireless Handset, Wireless LAN, Bluetooth®, Zigbee®

    3. Portable medical equipment

    4. Other battery powered applications

4. Pin configuration

5. Pin Description

6. APPLICATIONS INFORMATION

    1. General

        The NCP114 is a high performance 300 mA Low Dropout Linear Regulator. This device delivers very high PSRR (over 75 dB at 1 kHz) and excellent dynamic performance as load/line transients. In connection with very low quiescent current this device is very suitable for various battery powered applications such as tablets, cellular phones, wireless and many others. The device is fully protected in case of output overload, output short circuit condition and overheating, assuring a very robust design.

    2. Input Capacitor Selection (CIN)

        It is recommended to connect at least a 1 F Ceramic X5R or X7R capacitor as close as possible to the IN pin of the device. This capacitor will provide a low impedance path for unwanted AC signals or noise modulated onto constant input voltage. There is no requirement for the min. /max. ESR of the input capacitor but it is recommended to use ceramic capacitors for their low ESR and ESL. A good input capacitor will limit the influence of input trace inductance and source resistance during sudden load current changes. Larger input capacitor may be necessary if fast and large load transients are encountered in the application.

    3. Output Decoupling (COUT)

        The NCP114 requires an output capacitor connected as close as possible to the output pin of the regulator. The recommended capacitor value is 1 F and X7R or X5R dielectric due to its low capacitance variations over the specified temperature range. The NCP114 is designed to remain stable with minimum effective capacitance of 0.22F to account for changes with temperature, DC bias and package size. Especially for small package size capacitors such as 0402 the effective capacitance drops rapidly with the applied DC bias. There is no requirement for the minimum value of Equivalent Series Resistance (ESR) for the COUT but the maximum value of ESR should be less than 2 . Larger output capacitors and lower ESR could improve the load transient response or high frequency PSRR. It is not recommended to use tantalum capacitors on the output due to their large ESR. The equivalent series resistance of tantalum capacitors is also strongly dependent on the temperature, increasing at low temperature.

    4. Enable Operation

        The NCP114 uses the EN pin to enable/disable its device and to deactivate/activate the active discharge function. If the EN pin voltage is <0.4 V the device is guaranteed to be disabled. The pass transistor is turned−off so that there is virtually no current flow between the IN and OUT. The active discharge transistor is active so that the output voltage VOUT is pulled to GND through a 100  resistor. In the disable state the device consumes as low as typ. 10 nA from the VIN. If the EN pin voltage >0.9 V the device is guaranteed to be enabled. The NCP114 regulates the output voltage and the active discharge transistor is turned−off. The EN pin has internal pull−down current source with typ. value of 300 nA which assures that the device is turned−off when the EN pin is not connected. In the case where the EN function isn’t required the EN should be tied

directly to IN.

    5. Output Current Limit

        Output Current is internally limited within the IC to a typical 600 mA. The NCP114 will source this amount of current measured with a voltage drops on the 90% of the nominal VOUT. If the Output Voltage is directly shorted to ground (VOUT = 0 V), the short circuit protection will limit the output current to 630 mA (typ). The current limit and short circuit protection will work properly over whole temperature range and also input voltage range. There is no limitation for the short circuit duration.

    6. Thermal Shutdown

        When the die temperature exceeds the Thermal Shutdown threshold (TSD − 160°C typical), Thermal Shutdown event is detected and the device is disabled. The IC will remain in this state until the die temperature decreases below the Thermal Shutdown Reset threshold (TSDU − 140°C typical) . Once the IC temperature falls below the 140°C the LDO is enabled again. The thermal shutdown feature provides the protection from a catastrophic device failure due to accidental overheating. This protection is not intended to be used as a substitute for proper heat sinking