TLV70512YFPT

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1. Describe

TLV70512YFPT Series Low Dropout (LDO) Linear Regulators are low quiescent current devices Excellent line and load transient performance. These device is designed for power sensitive applications, with precise band gaps. a mistake The amplifier provides a typical accuracy of 0.5%. low output noise, very high power supply rejection ratio (PSRR) and low dropout voltage make this series LDOs are ideal for a variety of battery powered applications Handheld devices. All devices have a heat Shutdown and current limit safety. In addition, the TLV705 series is stable The effective output capacitance is only 0.1 μF. this feature enables the use of cost-effective capacitors with higher bias voltage and temperature Derating. The device is adjusted to the specified accuracy with zero output load. TLV705P series also provides an active pull-down circuit for fast discharge output. Both TLV705 and TLV705P series are available 0.77mm × 0.77mm DSBGA and PicoStar A package with three optimal height options For handheld applications.

2. Feature

    1. Very low dropout:

        – 105 mV at IOUT = 150 mA

        – 145 mV at IOUT = 200 mA

    2. Accuracy: 0.5% (typ.)

    3. Low IQ: 35 μA

    4. Provides a fixed output voltage of 0.7 V to 4.8 V

    5. VIN range: 2 V to 5.5 V

    6. High PSRR: 70 dB at 1 kHz

    7. Stable with 0.1 μF effective capacitance

    8. Thermal shutdown and overcurrent protection

    9. Ultra-low profile (0.15mm max height) PicoStar package option available

3. Application

    1. Wireless handset

    2. smart phone

    3. Zigbee® network

    4. Bluetooth® device

    5. Other Li-ion powered handheld products

    6. WLAN and other PC add-in cards

4. Pin configuration

5. Pin Description

6. Feature Description

The TLV70512YFPT and TLV705P series of devices belong to a family of next-generation value low-dropout (LDO) voltage regulators. These devices consume low quiescent current and deliver excellent line and load transient performance. This performance, combined with low noise, very good PSRR with little (VIN – VOUT) headroom, makes these devices ideal for RF portable applications. This family of regulators offers sub-band-gap output voltages down to 0.7 V, current limit, and thermal protection, and are specified from –40°C to +125°C. The TLV705P provides an active pulldown circuit to quickly discharge the outputs.

The internal current limits of the TLV705 series help protect the regulator during fault conditions. During current limit, the output sources a fixed amount of current that is largely independent of output voltage. In such a case, the output voltage is not regulated, and can be measured as VOUT = ILIMIT × RLOAD. The PMOS pass transistor dissipates [(VIN – VOUT) × ILIMIT] until a thermal shutdown is triggered and the device turns off. When the device cools down, the internal thermal shutdown circuit turns the device back on. If the fault condition continues, the device cycles between current limit and thermal shutdown; see Power Dissipation and Junction Temperature for more details. The PMOS pass element in the TLV705 has a built-in body diode that conducts current when the voltage at VOUT exceeds the voltage at VIN. This current is not limited, so if extended reverse voltage operation is anticipated, TI recommends external limiting to 5% of the rated output current.

The TLV705 uses a PMOS pass transistor to achieve low dropout. When (VIN – VOUT) is less than the dropout voltage (VDO), the PMOS pass device is in the linear region of operation and the input-to-output resistance is the RDS(on) of the PMOS pass element. VDO approximately scales with the output current because the PMOS device functions as a resistor in dropout.

The enable pin (EN) is active high. The device is enabled when the EN pin goes above 0.9 V. This relatively lower value of voltage required to turn the LDO on can power the device with the GPIO of recent processors with a GPIO voltage lower than traditional microcontrollers. The device is turned off when the EN pin is held at less than 0.4 V. When shutdown capability is not required, EN can be connected to the VIN pin.

7. Application Information

    The TLV705 is a LDO that offers very low dropout voltages in a tiny package. The operating junction temperature of this device is –40°C to +125°C.