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LTC1707

Features: `600mA Output Current (VIN 4V)` High Efficiency: Up to 96%` Constant Frequency: 350kHz Synchronizable to 550kHz` 2.85V to 8.5V VIN Range` 0.8V Feedback Reference Allows Low Voltage Outputs: 0.8V VOUT VIN` No Schottky Diode Required` 1.19V ±1% Reference Output Pin` Selectable Burst Mode...

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SeekIC No. : 004401829 Detail

LTC1707: Features: `600mA Output Current (VIN 4V)` High Efficiency: Up to 96%` Constant Frequency: 350kHz Synchronizable to 550kHz` 2.85V to 8.5V VIN Range` 0.8V Feedback Reference Allows Low Voltage Output...

LTC1707 Data Sheet

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Part Number:
LTC1707
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

`600mA Output Current (VIN 4V)
` High Efficiency: Up to 96%
` Constant Frequency: 350kHz Synchronizable to 550kHz
` 2.85V to 8.5V VIN Range
` 0.8V Feedback Reference Allows Low Voltage Outputs: 0.8V VOUT VIN
` No Schottky Diode Required
` 1.19V ±1% Reference Output Pin
` Selectable Burst ModeTM Operation/Pulse Skipping Mode
` Low Dropout Operation: 100% Duty Cycle
` Precision 2.7V Undervoltage Lockout
` Current Mode Control for Excellent Line and Load Transient Response
` Low Quiescent Current: 200A
` Shutdown Mode Draws Only 15mA Supply Current
` Available in 8-Lead SO Package


Application

· Cellular Telephones
· Portable Instruments
· Wireless Modems
· RF Communications
· Distributed Power Systems
· Single and Dual Cell Lithium


Pinout

Connection Diagram


Specifications

Input Supply Voltage ................................. 0.3V to 10V
ITH Voltage .................................................. 0.3V to 5V
RUN/SS, VFB Voltages ................................. 0.3V to VIN
SYNC/MODE Voltage .................................. . 0.3V to VIN
P-Channel Switch Source Current (DC) ................. 800mA
N-Channel Switch Sink Current (DC) ..................... 800mA
Peak SW Sink and Source Current ............................ 1.5A
Operating Ambient Temperature Range
    Commercial .................................................. 0 to 70
    Industrial ................................................ 40 to 85
Junction Temperature (Note 2) ................................ 125
Storage Temperature Range ................... 65 to 150
Lead Temperature (Soldering, 10 sec)...................... 300


Description

The LTC®1707 is a high efficiency monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.85V, making it suitable for both single and dual lithium-ion battery-powered applications. Burst Mode operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems.

The switching frequency of LTC1707 is internally set at 350kHz, allowing the use of small surface mount inductors. For noise sensitive applications it can be externally synchronized up to 550kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low preventing low frequency ripple from interfering with audio circuitry. Soft-start is provided by an external capacitor.

The internal synchronous MOSFET switch increases efficiency and eliminates the need for an external Schottky diode, saving components and board space. Low output voltages down to 0.8V are easily achieved due to the 0.8V internal reference. The LTC1707 comes in an 8-lead SO package.




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