The LTC3704 is a wide input range, current mode, positive-to-negative DC/DC controller that drives an N-channel power MOSFET and requires very few external components. Intended for low to high power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency. The IC’s operating frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 2.5V and a low shutdown quiescent current of 10µA make the LTC3704 ideally suited for battery-operated systems. For applications requiring constant frequency operation, the Burst Mode operation feature can be defeated using the MODE/SYNC pin. Higher than 36V switch voltage applications are possible with the LTC3704 by connecting the SENSE pin to a resistor in the source of the power MOSFET. The LTC3704 is available in the 10-lead MSOP package. Applications * SLIC Power Supplies * Telecom Power Supplies * Portable Electronic Equipment * Cable and DSL Modems * Router Supplies * High Efficiency Operation (No Sense Resistor Required) * Wide Input Voltage Range: 2.5V to 36V * Current Mode Control Provides Excellent Transient Response * High Maximum Duty Cycle (Typ 92%) * ±1% Internal Voltage Reference * ±2% RUN Pin Threshold with 100mV Hysteresis * Micropower Shutdown: IQ = 10µA * Programmable Switching Frequency (50kHz to 1MHz) with One External Resistor * Synchronizable to an External Clock Up to 1.3 × fOSC * User-Controlled Pulse Skip or Burst Mode® Operation * Internal 5.2V Low Dropout Voltage Regulator * Capable of Operating with a Sense Resistor for High Output Voltage Applications (VDS >36V) * Small 10-Lead MSOP Package https://elecena.pl/product/258827/wide-input-range-no-r-positive-to-negative-dc-dc-controller 2007-03-04 https://elecena.pl/product/258827/wide-input-range-no-r-positive-to-negative-dc-dc-controller 2017-10-11 https://elecena.pl/product/258827/wide-input-range-no-r-positive-to-negative-dc-dc-controller 2025-01-19