Datasheet Analog Devices LT3999 — Datenblatt

LT3999
Low Noise, 1A, 1MHz
Push-Pull DC/DC Driver
with Duty Cycle Control
FEATURES DESCRIPTION Wide Input Operating Range: 2.7V to 36V
n Dual 1A Switches with Programmable Current Limit
n Programmable Switching Frequency: 50kHz to 1MHz
n Frequency Synchronization Up to 1MHz
n ∆V Compensation Using Duty Cycle Control
IN
n Low Noise Topology
n Programmable Input Over and Undervoltage Lockout
n Cross Conduction Prevention Circuitry
n Programmable Soft-Start
n Low Shutdown Current: 4.7µF), low ESR ceramic will be adequate to filter
high frequency noise at the input. The output capacitors
supply energy to the output load only during switch
transitions. Therefore, large capacitance values are not
necessary on the output.
Transformer winding capacitance between the isolated
primary and secondary has parasitic currents that can
cause noise on the grounds. Providing a high frequency,
low impedance path between the primary and secondary …