Datasheet Analog Devices LT3640EUFD#PBF — Datenblatt

LT3640
Dual Monolithic Buck
Regulator with Power-On
Reset and Watchdog Timer
Description Features High Voltage Buck Regulator: 4V to 35V Operating Range 1.3A Output Current
n OVLO Protects Input to 55V
n Low Voltage Synchronous Buck Regulator: 2.5V to 5.5V Input Voltage Range 1.1A Output Current
n Synchronizable, Adjustable 350kHz to 2.5MHz
Switching Frequency
n Programmable Power-On Reset Timer
n Programmable Window Mode Watchdog Timer
n Typical Quiescent Current: 290µA
n Short-Circuit Robust
n Programmable Soft-Start
n Low Shutdown Current: I < 1µA
Q
n Available in Thermally Enhanced 28-Lead
(4mm × 5mm) QFN and 28-Lead TSSOP Packages The LT®3640 is a dual channel, current mode monolithic
buck switching regulator with a power-on reset and a
watchdog timer. Both regulators are synchronized to a
single oscillator with an adjustable frequency (350kHz to
2.5MHz). At light loads, both regulators operate in low
ripple Burst Mode® to maintain high efficiency and low …