Datasheet Analog Devices LTC3854EDDB#TRMPBF — 数据表

LTC3854
Small Footprint, Wide
VIN Range Synchronous
Step-Down DC/DC Controller
DESCRIPTION FEATURES
Wide Operating VIN Range: 4.5V to 38V
RSENSE or DCR Current Sensing
±1% 0.8V Reference Accuracy Over Temperature
400kHz Switching Frequency
Dual N-channel MOSFET Synchronous Drive
Very Low Dropout Operation: 97% Duty Cycle
Starts Up Into Pre-Biased Output
Adjustable Output Voltage Soft-Start
Output Current Foldback Limiting
(Disabled During Soft-Start)
n Output Overvoltage Protectio 5V LDO for External Gate Drive
n OPTI-LOOP® Compensation Minimizes C
OUT
n Low Shutdown I : 15µA
Q
n Tiny Thermally Enhanced 12-Pin 2mm × 3mm DFN
and MSOP Packages n n n n n n n n The LTC3854® is a high performance synchronous stepdown switching DC/DC controller that drives an all Nchannel synchronous power MOSFET stage. n The LTC3854 features a 400kHz constant frequency current
mode architecture. The LTC3854 operates from a 4.5V to …