LTC1627IS8#PBF

LTC1627 is a monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.65V, making it suitable for one or two lithium-ion battery-powered applications. Burst Mode operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, which extends operating time in battery-operated systems. The operating frequency is internally set at 350KHz, allowing the use of small surface mount inductors. For switching noise sensitive applications it can be externally synchronized up to 525KHz. The SYNC/FCB control pin guarantees regulation of secondary windings regardless of load on the main output by forcing continuous operation. It is used in application such as cellular telephones, portable instruments, wireless modems, RF communications, distributed power systems, scanners, single and dual cell lithium etc.

• High efficiency upto 96%
• Wide input voltage range is 2.65V to 8.5V
• VOUT from 0.8V to VIN, IOUT to 500mA, no schottky diode required
• Precision 2.5V undervoltage lockout, secondary winding regulation
• Current mode operation for excellent line and load transient response
• Low quiescent current is 200µA typical
• Supply current (shutdown mode) is 15µA typical
• Feedback current is 20nA 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