Description

The LTC3405A is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20?A and drops to <1?A in shutdown. The 2.5V to5.5V input voltage range makes the LTC3405A ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors.The LTC3405A is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.8V feedback reference voltage. The LTC3405A is available in a low profile (1mm) ThinSOT package.For fixed 1.5V and 1.8V output versions, refer to theLTC3405A-1.5/LTC3405A-1.8 data sheet.Protected by U.S. Patents, including 6580258, 5481178. Vout Features LTC3405 Adj. - LTC3405A Adj. Stable With All Ceramic Caps LTC3405A-1.375 1.375V Stable With All Ceramic Caps LTC3405A-1.5 1.5V Stable With All Ceramic Caps LTC3405A-1.8 1.8V Stable With All Ceramic Caps Applications Cellular Telephones Personal Information Appliances Wireless and DSL Modems Digital Still Cameras MP3 Players Portable Instruments

Type:

Part number: DC480A-E

More details from Analog Devices Inc.