Datasheet Analog Devices LT3844 — Ficha de datos

LT3844
High Voltage, Current Mode
Switching Regulator Controller with
Programmable Operating Frequency
Features Description High Voltage Operation: Up to 60V
n Output Voltages Up to 36V (Step Down)
n Programmable Constant Frequency: 100kHz to
500kHz
n Synchronizable up to 600kHz
n Burst Mode® Operation: 120µA Supply Current
n 10µA Shutdown Supply Current
n ±1.3% Reference Accuracy
n Drives N-Channel MOSFET
n Programmable Soft-Start
n Programmable Undervoltage Lockout
n Internal High Voltage Regulator for Gate Drive
n Thermal Shutdow Current Limit Unaffected by Duty Cycle
n 16-Pin Thermally Enhanced TSSOP Package The LT®3844 is a DC/DC controller used for medium power,
low part count, high efficiency supplies. It offers a wide
4V to 60V input range (7.5V minimum start-up voltage)
and can implement step-down, step-up, inverting and
SEPIC topologies. n The LT3844 includes Burst Mode operation, which reduces
quiescent current below 120µA and maintains high efficiency at light loads. An internal high voltage bias regulator …