LTC3542EDC#TRMPBF

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 DFN 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