LTC3850/LTC3850-1
Dual, 2-Phase
Synchronous Step-Down
Switching Controller
DESCRIPTION FEATURES Dual, 180В° Phased Controllers Reduce Required
Input Capacitance and Power Supply Induced Noise
n High Efficiency: Up to 95%
n R
SENSE or DCR Current Sensing
n В±1% 0.8V Output Voltage Accuracy
n Phase-Lockable Fixed Frequency 250kHz to 780kHz
n Supports Pre-Biased Output
n Dual N-Channel MOSFET Synchronous Drive
n Wide V Range: 4V to 24V (30V for LTC3850I)
IN
Operatio Adjustable Soft-Start Current Ramping or Tracking
n Foldback Output Current Limiting
n Output Overvoltage Protectio Power Good Output Voltage Monitor
n 28-Pin 4mm Г— 4mm, 4mm Г— 5mm QFN and Narrow
SSOP Packages The LTCВ®3850 is a high performance dual synchronous
step-down switching regulator controller that drives all
N-channel power MOSFET stages. A constant-frequency
current mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and supply noise are …
