New Dual Step-Down Regulator

Linear Technology recently announced an addition to its family of power regulator solutions. The LTC3622 is a dual step-down regulator in a small 3 × 4 mm package that provides two independently configurable 1-A outputs operating from a 2.7 to 17 V input. External voltage divider networks define the two output voltages or alternatively a range of fixed output voltage versions result in a lower component count. The input voltage range makes it suitable for operation from single or multiple lithium cells or from a vehicular supply.ltc3622-Linear

The regulator can operate in Burst mode to give highest efficiency at light loads or Pulse-Skipping mode to give lower ripple noise. The system clock can be synchronized to an external source to help to reduce system noise bandwidth.

Main Features:

  •  Dual step-down outputs: 1 A per channel
  •  VIN range: 2.7 to 17 V
  •  VOUT range: 0.6 V to VIN
  •  Up to 95% efficiency
  •  No-load IQ = 5 μA (both channels enabled)  < 4 μA (one channel enabled)
  •  High efficiency, low dropout operation (100% duty cycle)
  •  Constant frequency (1 MHz/2.25 MHz) with external synchronization
  •  ±1% output voltage accuracy
  •  Current mode operation improves line and load transient response
  •  Phase shift programmable with external clock
  •  Selectable current limit
  •  Internal compensation and soft-start
  •  Compact 14-pin DFN (3 mm × 4 mm) package

The regulator is available now with a per-unit cost starting at $3.75 for orders of 1,000 units.

[Source: Linear Technology]

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