LTC3621IMS8E#PBF LTC3621IMS8E#TRPBF 1MHz Synchronous Step-Down Regulator with Ultralow Quiescent Current
microchip battery management
,battery charge management ic
LTC3621IMS8E#PBF LTC3621IMS8E#TRPBF 1MHz Synchronous Step-Down Regulator with Ultralow Quiescent Current
FeaTures
n Wide VIN Range: 2.7V to 17V
n Wide VOUT Range: 0.6V to VIN
n 95% Max Efficiency
n Low IQ < 3.5μA, Zero-Current Shutdown
n Constant Frequency (1MHz/2.25MHz)
n Full Dropout Operation with Low IQ
n 1A Rated Output Current
n ±1% Output Voltage Accuracy
n Current Mode Operation for Excellent Line and Load
ApplicaTions
n Portable-Handheld Scanners
n Industrial and Embedded Computing
n Automotive Applications
n Emergency Radio
DescripTion
The LTC®3621/LTC3621-2 is a high efficiency 17V, 1A synchronous monolithic step-down regulator. The switch- ing frequency is fixed to 1MHz or 2.25MHz with a ±40% synchronizing range. The regulator features ultralow quies- cent 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.
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