LTC1707IS8#PBF

LTC1707 is a high efficiency monolithic current mode synchronous buck regulator using a fixed frequency architecture. 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 is internally set at 350KHz, allowing the use of small surface mount inductors. 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. It is used in application such as cellular telephones, portable instruments, wireless modems, RF communications, distributed power systems, single and dual cell lithium etc.

• 600mA output current (VIN ≥ 4V)
• Input voltage range is 2.85V to 8.5V
• 0.8V feedback reference allows low voltage
• Low quiescent current is 200µA typical at (VITH = 0V, VIN = 8.5V, VSYNC/MODE = open)
• Shutdown supply current is 11µA typical at (VRUN/SS = 0V, 3V <lt/> VIN <lt/> 8.5V)
• Selectable Burst Mode™ operation/pulse skipping mode
• Current mode control for excellent line and load transient response
• Reference output voltage is 1.91V typical
• Operating ambient temperature is -40°C to 85°C
• Package style is 8-lead NSOIC

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party