Datasheet Analog Devices LTC3836 — Datenblatt

LTC3836
Dual 2-Phase,
No RSENSETM Low VIN
Synchronous Controller
FEATURES DESCRIPTION n 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
capacitance are minimized by operating the two controllers out-of-phase. Pulse-skipping operation provides high
efficiency at light loads. The 97% duty cycle capability
provides low dropout operation, extending operating time
in battery-powered systems. No Current Sense Resistors Required
Out-of-Phase Controllers Reduce Required Input
Capacitance
All N-Channel Synchronous Drive
VIN Range: 2.75V to 4.5V
Constant-Frequency Current Mode Operation
0.6V ±1.5% Voltage Reference
Low Dropout Operation: 97% Duty Cycle
True PLL for Frequency Locking or Adjustment …