LTC3101 - Wide Vin, Multi-Output DC/DC Converter and PowerPath Controller

Features

• Low Loss PowerPath™ Control: Seamless, Automatic Transition from Battery to USB or Wall Adapter Power
• Wide V_IN Range: 1.8V to 5.5V
• Buck-Boost V_OUT: 1.5V to 5.25V
• Buck-Boost Generates 3.3V at 300mA for V_IN ≥ 1.8V, 3.3V at 800mA for V_IN ≥ 3V
• Dual 350mA Buck Regulators, V_OUT: 0.6V to V_IN
• 38μA Quiescent Current in Burst Mode® Operation
• 1.8V, 50mA Always-On LDO
• Protected 100mA Hot Swap™ Output
• Pushbutton On/Off Control
• Current Limited 200mA MAX Output
• Programmable Power-Up Sequencing
• 24-lead 4mm × 4mm × 0.75mm QFN Package

Typical Application

Description

The LTC3101 is a complete 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 complete 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 50mA LDO and a 200mA 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 100mA 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.

Packaging

QFN-24

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC3101EUF#PBF	QFN	24	E	$5.64	$3.95	View
LTC3101EUF#TRPBF	QFN	24	E		$4.01	View
Buy Now
Request Samples

^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

• Ultra-Portable Digital Video Cameras
• Personal Handheld GPS Navigators
• Portable Medical Instruments

Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.