LTC1474CMS8#PBF

LTC®1474 series is a high efficiency step down converter with internal P-channel MOSFET power switches that draw only 10µA typical DC supply current at no load while maintaining output voltage. This uses logic-controlled shutdown. The low supply current coupled with Burst Mode™ operation enables this to maintain high efficiency over a wide range of loads. This features, along with its capability of 100% duty cycle for low dropout and wide input supply range, make this ideal for moderate current (up to 300mA) battery-powered applications. The peak current control also provides short-circuit protection and excellent start-up behaviour. A low-battery detector that remains functional in shutdown is provided. Typical applications are cellular telephones and wireless modems, 4mA to 20mA current loop step-down converter, portable instruments, battery-operated digital devices, battery chargers, inverting converters, intrinsic safety applications.

• High efficiency: over 92% possible, very low standby current is 10µA typ
• Internal 1.4ohm power switch (VIN=10V), wide VIN range: 3V to 18V operation
• Very low dropout operation is 100% duty cycle, low-battery detector functional during shutdown
• Short-circuit protection, few external components required
• Feedback voltage range from 1.205 to 1.255V (ILOAD=50mA, TA=25°C, VIN=10V, VRUN=open, RSENSE=0)
• Adjustable output voltage
• Feedback current is 30nA (TA=25°C, VIN=10V, VRUN=open, RSENSE=0)
• Output ripple is 50mVP-P typical
• 8-lead plastic MSOP package
• Commercial operating ambient temperature range from 0°C to 70°C

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