Datasheet Analog Devices LTC3822EMSE#PBF — 数据表

LTC3822
No RSENSE™, Low Input
Voltage, Synchronous Step-Down
DC/DC Controller
FEATURES DESCRIPTION n The LTC®3822 is a synchronous step-down switching
regulator controller that drives external N-channel power
MOSFETs using few external components. The constant
frequency current mode architecture with MOSFET VDS
sensing eliminates the need for sense resistors and improves efficiency. n No Current Sense Resistor Required
All N-Channel MOSFET Synchronous Drive
High Current Outputs Possible
Constant Frequency Current Mode Operation for
Excellent Line and Load Transient Response
VIN: 2.75V to 4.5V
±1% 0.6V Reference
Low Dropout Operation: 99% Duty Cycle
Selectable Frequency (300kHz/550kHz/750kHz)
Internal Soft-Start Circuitry
Selectable Maximum Peak Current Sense Threshold
Digital RUN Control Pin
Output Overvoltage Protection
Micropower Shutdown: IQ = 7.5μA
Tiny Thermally Enhanced Leadless (3mm × 3mm) …