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  • TD1730

  • TD1730 High-Performance PWM Controller

    (DATASHEET)

    The TD1730 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. The TD1730 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers.

    The TD1730 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the TD1730 provides very high efficiency over light to heavy loads with loading- modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low-noise requirements.

    The TD1730 is equipped with accurate positive current- limit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-On- Reset function monitors the voltage on VCC to prevent wrong operation during power-on. The TD1730 has a 1ms digital soft-start and built-in an integrated output discharge method for soft-stop. An internal integrated soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current. A soft-stop function actively discharges the output capacitors with controlled reverse inductor current.

    The TD1730 is available in 10pin TDFN 3x3 package.

    Features

    Adjustable Output Voltage from +0.7V to +5.5V

    0.7V Reference Voltage

    ±1% Accuracy Over-Temperature

    Operates from an Input Battery Voltage Range of +1.8V to +32V

    Power-On-Reset Monitoring on VCC Pin

    Excellent Line and Load Transient Responses

    PFM Mode for Increased Light Load Efficiency

    Selectable PWM Frequency from 4 Preset Values

    Integrated MOSFET Drivers

    Integrated Bootstrap Forward P-CH MOSFET

    Adjustable Integrated Soft-Start and Soft-Stop

    Selectable Forced PWM or Automatic PFM/PWM Mode

    Power Good Monitoring

    70% Under-Voltage Protection

    125% Over-Voltage Protection

    Adjustable Current-Limit Protection

    Using Sense Low-Side MOSFET’s RDS(ON)

    Over-Temperature Protection

    Auto Rework from Protection Mode

    TDFN-10 3x3 Package

    Lead Free and Green Devices Available (RoHS Compliant)

    Applications

    Notebook

    Table PC

    Hand-Held Portable

    AIO PC

    LCD Monitor / TV

    Battery Charger

    ADSL Modem

    Telecom / Networking Equipment