TLV74033PDQNR

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1. Describe

The TLV74033PDQNR low dropout (LDO) linear regulator is a Low Quiescent Current LDO with Excellent Line and Load Designed for power-sensitive transient performance application. The device provides typical accuracy1%. The TLV740P also provides inrush current control During device power-up and enablement. TLV740P Limit the input current within the defined current limit Avoid large currents flowing from the input power supply resource. This function is in battery powered device. TLV74033PDQNR provides standard DQN and DBV Bag. The TLV740P also provides an active The pull-down circuit quickly discharges the output load.

2. Feature

    1. Foldback overcurrent protection

    2. Bag:

        – 1mm × 1mm, 4-pin X2SON

        – 5-pin SOT-23

    3. Very low dropout: 460 mV at 300 mA

    4. Accuracy: 1%

    5. Low IQ: 50 µA

    6. Input voltage range: 1.4 V to 5.5 V

    7. Available in fixed output voltage: 1 V to 3.3 V

    8. High PSRR: 65 dB at 1 kHz

    9. Active output discharge

3. Application

    1. Portable media player

    2. Standard laptop

    3. Streaming media player

    4. Home printer

    5. Set-top boxes and DVRs

4. Pin configuration

5. Pin Description

6. Recommended Capacitor Types

The device is designed to be stable using low equivalent series resistance (ESR) ceramic capacitors at the input and output. Multilayer ceramic capacitors have become the industry standard for these types of applications and are recommended, but must be used with good judgment. Ceramic capacitors that employ X7R-, X5R-, and C0G-rated dielectric materials provide relatively good capacitive stability across temperature, whereas the use of Y5V- rated capacitors is discouraged because of large variations in capacitance. Regardless of the ceramic capacitor type selected, the effective capacitance varies with operating voltage and temperature. As a rule of thumb, expect the effective capacitance to decrease by as much as 50%. The input and output capacitors recommended in the Recommended Operating Conditions table account for an effective capacitance of approximately 50% of the nominal value.

7. Input and Output Capacitor Requirements

The device requires an input capacitor of 1.0 µF or larger, as specified in the Recommended Operating Conditions table for stability. A higher value capacitor may be necessary if large, fast rise-time load or line transients are anticipated or if the device is located several inches from the input power source. The device also requires an output capacitor of 1.0 µF or larger, as specified in the Recommended Operating Conditions table for stability. Dynamic performance of the device is improved by using a higher capacitor than the minimum output capacitor.

8. Dropout Operation

If the input voltage is lower than the nominal output voltage plus the specified dropout voltage, but all other conditions are met for normal operation, the device operates in dropout mode. In this mode, the output voltage tracks the input voltage. During this mode, the transient performance of the device becomes significantly degraded because the pass transistor is in the ohmic or triode region, and acts as a switch. Line or load transients in dropout can result in large output-voltage deviations. When the device is in a steady dropout state (defined as when the device is in dropout, VIN < VOUT(NOM) + VDO, directly after being in a normal regulation state, but not during startup), the pass transistor is driven into the ohmic or triode region. When the input voltage returns to a value greater than or equal to the nominal output voltage plus the dropout voltage (VOUT(NOM) + VDO), the output voltage can overshoot for a short period of time while the device pulls the pass transistor back into the linear region.