LTC3564EDCB#TRMPBF

LTC®3564 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20μA, dropping to ≤1μA in shutdown. The 2.5V to 5.5V input voltage range makes this ideally suited for single Li-Ion battery-powered or 3.3V to 5V input voltage applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Automatic Burst Mode® operation increases efficiency at light loads, further extending battery runtime. Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. Typical applications are cellular telephones, wireless and DSL modems, digital still cameras, media players, portable instruments, point of load regulation.

• No schottky diode required, low dropout operation is 100% duty cycle
• 0.6V reference allows low output voltages
• Current mode operation for excellent line and load transient response, overtemperature protected
• Feedback current is ±30nA maximum (TA=25°C.VIN=3.6V)
• Regulated feedback voltage range from 0.588 to 0.612V ( TA=25°C.VIN=3.6V)
• Input DC bias current is 400μA max active mode (VFB=0.5V or VOUT=90%, ILOAD=0A)
• Oscillator frequency range from 1.8 to 2.7MHz (VFB=0.6V or VOUT=100%, TA=25°C.VIN=3.6V)
• 6-lead plastic DFN package
• Temperature rating range from -40°C to 125°C

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