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LTC3704

Features: *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 = ...

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SeekIC No. : 004402300 Detail

LTC3704: Features: *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%)*±...

LTC3704 Data Sheet

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Part Number:
LTC3704
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

*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


Application

SLIC Power Supplies
Telecom Power Supplies
Portable Electronic Equipment
Cable and DSL Modems
Router Supplies


Pinout

Connection Diagram


Specifications

VIN Voltage ............................................... ... 0.3V to 36V
INTVCC Voltage ..............................................  0.3V to 7V
INTVCC Output Current ............................................  50mA
GATE Voltage ...............................0.3V to VINTVCC + 0.3V
ITH Voltage .................................................  0.3V to 2.7V
NFB Voltage ................................................. 2.7V to 2.7V
RUN, MODE/SYNC Voltages ..............................0.3V to 7V
FREQ Voltage ................................................0.3V to 1.5V
SENSE Pin Voltage .......................................  0.3V to 36V
Operating Temperature Range (Note 2) .. 40°C to 85°C
Junction Temperature (Note 3) ............................... 125°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................... 300°C


Description

    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 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.




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