LTC3409EDD#PBF

LTC3409 is a high efficiency, monolithic synchronous buck regulator using a constant frequency, current mode architecture. The output voltage is adjusted via an external resistor divider. Fixed switching frequencies of 1.7MHz and 2.6MHz are supported. Alternatively, an internal PLL will synchronize to an external clock in the frequency range of 1MHz to 3MHz. This range of switching frequencies allows the use of small surface mount inductors and capacitors, including ceramics. The 1.6V to 5.5V input voltage range makes the device ideally suited for single cell Li-Ion, Li-Metal and 2-cell alkaline, NiCd or NiMH battery-powered applications. 100% duty cycle capability provides low dropout operation, extending battery life in portable systems. Burst Mode operation can be user-enabled, increasing efficiency at light loads, further extending battery life. It is used in application such as cellular phones, digital cameras, MP3 players etc.

• Input DC bias current (sleep mode) is 65μA typical at (VOUT = 103%, ILOAD = 0A)
• 600mA output current (VIN = 1.8V, VOUT = 1.2V)
• 750mA peak inductor current, no schottky diode required
• 0.613V reference voltage, stable with ceramic capacitors
• Current mode operation for excellent line and load transient response
• Overtemperature protection
• Shutdown current is 1μA maximum at (VRUN = 0V, VIN = 5.5V)
• Feedback current is ±30nA maximum
• Operating temperature is -40°C to 85°C
• Package style is 8-lead plastic DFN

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