Datasheet Linear Technology LTC3868IUH#PBF — 数据表

LTC3868
Low IQ, Dual
2-Phase Synchronous
Step-Down Controller
DESCRIPTION FEATURES The LTC®3868 is a high performance dual step-down
switching regulator controller that drives all N-channel
synchronous power MOSFET stages. A constant frequency
current mode architecture allows a phase-lockable frequency of up to 850kHz. Power loss and noise due to the
input capacitor ESR are minimized by operating the two
controller outputs out of phase. Low Operating IQ: 170µA (One Channel On)
Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 14V
Wide VIN Range: 4V to 24V
RSENSE or DCR Current Sensing
Out-of-Phase Controllers Reduce Required Input
Capacitance and Power Supply Induced Noise
n OPTI-LOOP® Compensation Minimizes C
OUT
n Phase-Lockable Frequency (75kHz to 850kHz)
n Programmable Fixed Frequency (50kHz to 900kHz)
n Selectable Continuous, Pulse-Skipping or
Burst Mode® Operation at Light Loads
n Very Low Dropout Operation: 99% Duty Cycle
n Adjustable Output Voltage Soft-Start …