Features

• Input Noise Filter Minimizes Supply Noise
• Constant Frequency Operation
• 3-Bit LED Current Control
• No Inductors
• Low Shutdown Current: I_IN < 1µA
• Output Current: 100mA
• V_IN Range: 2.7V to 4.5V
• 1.8MHz Switching Frequency
• Soft-Start Limits Inrush Current at Turn-On
• Short-Circuit and Overtemperature Protected
• Available in 10-Pin MSOP Package

Typical Application

Description

Low external parts count (one small flying capacitor and three small bypass capacitors) and small MSOP-10 package size make the LTC3201 ideally suited for space constrained applications. An input noise filter further reduces input noise,thus enabling direct connection to the battery. High switching frequency enables the use of small external capacitors.

The LTC3201 contains overtemperature protection and can survive an indefinite output short to GND. Internal soft-start circuitry also prevents excessive inrush current on start-up. A low current shutdown feature disconnects the load from V_IN and reduces quiescent current to less than 1µA.