LTC3101 Datasheet | Linear Technology

Features n Low Loss Power Path™ Control: Seamless, Automatic Transition from Battery to USB or Wall Adapter Power n Wide VIN Range: 1.8V to 5.5V n Buck-Boost VOUT: 1.5V to 5.25V n Buck-Boost Generates 3.3V at 300m A for VIN ≥ 1.8V, 3.3V at 800m A for VIN ≥ 3V n Dual 350m A Buck Regulators, VOUT: 0.6V to VIN n 38μA Quiescent Current in Burst Mode® Operation n 1.8V, 50m A Always-On LDO n Protected 100m A Hot Swap™ Output n Pushbutton On/Off Control n Current Limited 200m A MAX Output n Programmable Power-Up Sequencing n 24-lead 4mm × 4mm × 0.75mm QFN Package APPLICATIONS n Ultra-Portable Digital Video Cameras n Personal Handheld GPS Navigators n Portable Medical Instruments Wide VIN, Multi-Output DC/DC Converter and Power Path Controller DESCRIPTION The LTC®3101 is a plete power management solution for low power portable devices. It provides three high efficiency switching DC/DC converters which seamlessly transition from battery to USB/wall adapter power when available. A synchronous buck-boost regulator provides plete flexibility, allowing operation from a single Li-Ion/Polymer battery, 2 to 3 AA cells, a USB port or any other power source operating from 1.8V to 5.5V. Two always-alive outputs, a 50m A LDO and a 200m A MAX output that tracks the higher voltage input supply, provide power for critical functions or additional external regulators. Flash memory cards can be directly powered from the protected 100m A Hot Swap output. Pushbutton control logic and a programmable-duration microprocessor reset generator simplify interfacing to a microprocessor while internal sequencing and independent enable pins provide flexible power-up options. The LTC3101 is available in a low profile (0.75mm) 24-lead 4mm × 4mm QFN package. L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and Hot Swap and Power Path are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL...