LT8616 Datasheet | Linear Technology

LT8616 Dual 42V Synchronous Monolithic Step-Down Regulator with 6.5µA Quiescent Current Features n Wide Input Voltage Range: 3.4V to 42V n 2.5A and 1.5A Buck Regulators with Separate Inputs n Fast Minimum Switch On-Time: 35ns n Ultralow Quiescent Current Burst Mode® Operation: n 6.5µA IQ Regulating 12VIN to 5VOUT and 3.3VOUT n Output Ripple < 15m V n180° Out of Phase Switching n Adjustable: 200k Hz to 3MHz n Synchronizable: 250k Hz to 3MHz n Accurate 1V Enable Pin Thresholds n Internal pensation n Output Soft-Start and Tracking n TSSOP Package: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin Is Left Floating n Thermally Enhanced 28-Lead TSSOP and 3mm × 6mm QFN Packages APPLICATIONS n Automotive and Industrial Supplies n General Purpose Step-Down DESCRIPTION The LT®8616 is a high efficiency, high speed, dual synchronous monolithic step-down switching regulator that consumes only 6.5µA of quiescent current with both channels enabled. Both channels contain all switches and necessary circuitry to minimize the need for external ponents. Low ripple Burst Mode operation enables high efficiency down to very low output currents while minimizing output ripple. A SYNC pin allows synchronization to an external clock. Internal pensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The enable pins have accurate 1V thresholds and can be used to program undervoltage lockout. Capacitors on the TR/SS pins programs the output voltage ramp rate during startup while the PG pins signal when each output is within 10% of the programmed output voltage. The LT8616 is available in a TSSOP package for high reliability. L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 5V, 3.3V, 700k...