TPS73643DBVR

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1. Description

The TPS73643DBVR family of low-dropout (LDO) linear voltage regulators uses a new topology: an NMOS pass element in a voltage-follower configuration. This topology is stable using output capacitors with low ESR, and even allows operation without a capacitor. It also provides high reverse blockage (low reverse current) and ground pin current that is nearly constant over all values of output current. The TPS736xx uses an advanced BiCMOS process to yield high precision while delivering very low dropout voltages and low ground pin current. Current consumption, when not enabled, is under 1 μA and ideal for portable applications. The extremely low output noise (30 μVRMS with 0.1-μF CNR) is ideal for powering VCOs. These devices are protected by thermal shutdown and foldback current limit.

2. Features

    1. Stable with No Output Capacitor or Any Value or Type of Capacitor

    2. Input Voltage Range of 1.7 V to 5.5 V

    3. Ultra-Low Dropout Voltage: 75 mV typ

    4. Excellent Load Transient Response—with or without Optional Output Capacitor

    5. New NMOS Topology Delivers Low Reverse Leakage Current

    6. Low Noise: 30 μVRMS typ (10 Hz to 100 kHz)

    7. 0.5% Initial Accuracy

    8. 1% Overall Accuracy Over Line, Load, and Temperature

    9. Less Than 1 μA max IQ in Shutdown Mode

  10. Thermal Shutdown and Specified Min/Max Current Limit Protection

  11. Available in Multiple Output Voltage Versions

        – Fixed Outputs of 1.20 V to 5.0 V

        – Adjustable Output from 1.20 V to 5.5 V

        – Custom Outputs Available

3. Applications

    1. Portable/Battery-Powered Equipment

    2. Post-Regulation for Switching Supplies

    3. Noise-Sensitive Circuitry such as VCOs

    4. Point of Load Regulation for DSPs, FPGAs,ASICs, and Microprocessors

4. Pin configuration

5. Pin Description

6. Application Information

The TPS73643DBVR belongs to a family of new generation LDO regulators that use an NMOS pass transistor to achieve ultra-low-dropout performance, reverse current blockage, and freedom from output capacitor constraints. These features, combined with low noise and an enable input, make the TPS736xx ideal for portable applications. This regulator family offers a wide selection of fixed output voltage versions and an adjustable output version. All versions have thermal and over-current protection, including foldback current limit.