The LTC3621/LTC3621-2 is a high efficiency 17V, 1A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz or 2.25MHz with a ±40% synchronizing range. The regulator features ultralow quiescent current and high efficiencies over a wide VOUT range.
The step-down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range from 0.6V to VIN while delivering up to 1A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest voltage ripple. The MODE pin can also be used to allow the user to sync the switching frequency to an external clock.
LTC3621IDCB-23.3#TRMPBF OptionsPart NameFrequencyVOUTLTC36211.00MHzAdjustableLTC3621-3.31.00MHz 3.3VLTC3621-51.00MHz 5VLTC3621-22.25MHz AdjustableLTC3621-23.32.25MHz3.3LTC3621-252.25MHz 5V
Feature
- Wide VIN Range: 2.7V to 17V
- Wide VOUT Range: 0.6V to VIN
- 95% Max Efficiency
- Low IQ < 3.5μA, Zero-Current Shutdown
- Constant Frequency (1MHz/2.25MHz)
- Full Dropout Operation with Low IQ
- 1A Rated Output Current
- ±1% Output Voltage Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- Synchronizable to External Clock
- Pulse-Skipping, Forced Continuous, Burst Mode® Operation
- Internal Compensation and Soft-Start
- Overtemperature Protection
- Compact 6-Lead DFN (2mm × 3mm) Package or Thermally-Enhanced MS8E Package with Power Good Output and Independent SGND Pin
Applications
- Portable-Handheld Scanners
- Industrial and Embedded Computing
- Automotive Applications
- Emergency Radio
