LTC3836

LTC3836 Dual 2-Phase, No RSENSETM Low VIN Synchronous Controller FEATURES n No Current Sense Resistors Required n Out-of-Phase Controllers Reduce Required Input Capacitance n All N-Channel Synchronous Drive n VIN Range: 2.75V to 4.5V n Constant-Frequency Current Mode Operation n 0.6V ±1.5% Voltage Reference n Low Dropout Operation: 97% Duty Cycle n True PLL for Frequency Locking or Adjustment n Selectable Pulse-Skipping/Continuous Operation n Tracking Function n Internal Soft-Start Circuitry n Power Good Output Voltage Monitor n Output Overvoltage Protection n Micropower Shutdown: IQ = 6.5μA n Tiny Low Profile (4mm × 5mm) QFN and Narrow SSOP Packages APPLICATIONS n General Purpose 3.3V to 1.X Supplies n Single Lithium-Ion Powered Devices n Distributed DC Power Systems L, LT, LTC, LTM, Linear Technology, Burst Mode, OPTI-LOOP and the Linear logo are registered trademarks and No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5929620, 6144194, 6304066, 6498466, 6580258, 6611131. DESCRIPTION The LTC®3836 is a 2-phase dual output synchronous step-down switching regulator controller with tracking 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. The power loss and noise due to the ESR of the input capac...