LTC3542ES6#TRPBF

LTC®3542 is a high efficiency monolithic synchronous buck converter using a constant frequency, current mode architecture. Supply current during operation is only 26μA, dropping to <lt/>1μA in shutdown. The 2.5V to 5.5V input voltage range makes this ideally suited for single Li-Ion battery-powered applications. Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors, and it can synchronize to an external clock signal with a frequency range of 1MHz to 3MHz through the MODE/SYNC pin. This is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint. This can be configured for the power saving Burst Mode® Operation. For reduced noise and RF interference, the MODE/SYNC pin can be configured for pulse skipping operation. Typical applications are cellular telephones, wireless and DSL modems, digital cameras, MP3 players, PDAs and other handheld devices.

• 100% duty cycle provides low dropout operation, extending battery life in portable systems
• Output voltage is adjustable from 0.6V to VIN
• High efficiency is up to 96%, high peak switch current is 1000mA
• Low dropout operation is 100% duty cycle, no schottky diode required
• Internal soft-start limits inrush current, ±2% output voltage accuracy
• Current mode operation for excellent line and load transient response, overtemperature protected
• Feedback input current is ±30nA maximum
• Peak switch current is 1000mA maximum (VIN=3V, VFB=0.5V, duty cycle <lt/> 35%)
• Temperature rating range from -40°C to 85°C
• 6-lead plastic TSOT-23 package

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