DC-DC Switching Buck Step Down Regulator, Adjustable, 1.6V-5.5Vin, 620mV-5.5Vout, 0.6Aout, DFN-8

LTC3409EDD#PBF - DC-DC Switching Buck Step Down Regulator, Adjustable, 1.6V-5.5Vin, 620mV-5.5Vout, 0.6Aout, DFN-8

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Product Overview

The LTC3409EDD#PBF is a high-efficiency monolithic synchronous Buck Regulator using a constant frequency and current-mode architecture. The output voltage is adjusted via an external resistor divider. Fixed switching frequency of 1.7 and 2.6MHz is supported. Alternatively, an internal PLL will synchronize to an external clock in the frequency range of 1 to 3MHz. This range of switching frequencies allows the use of small surface mount inductors and capacitors, including ceramics. Supply current during Burst Mode® operation is only 65µA dropping to <1µA in shutdown. The 1.6 to 5.5V input voltage range makes the LTC3409 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.
  • Internal soft-start
  • No Schottky diode required
  • Stable with ceramic capacitors
  • Current-mode operation for excellent line and load transient response
  • Over-temperature protection
  • Internal oscillator can be synchronizable to an external clock, 1 to 3MHz range
  • Up to 95% high efficiency
  • 0.613V Reference voltage


Consumer Electronics, Portable Devices

Product Information

Synchronous Buck (Step Down)
MSL 1 - Unlimited
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