LTC3704 Datasheet | Linear Technology

Wide Input Range, No RSENSETM Positive-to-Negative DC/DC Controller Features DESCRIPTIO - 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 100m V Hysteresis - Micropower Shutdown: IQ = 10μA - Programmable Switching Frequency (50k Hz to 1MHz) with One External Resistor - Synchronizable to an External Clock Up to 1.3 × f OSC - 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 U APPLICATIO S - SLIC Power Supplies - Tele Power Supplies - Portable Electronic Equipment - Cable and DSL Modems - Router Supplies The LTC®3704 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 ponents. 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 50k Hz 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. , LTC, LT and LTM are registered trademarks of Linear...