DUAL CURRENT MODE, SYNCHRONOUS STEP-DOWN CONTROLLER WITH 100-mA
STANDBY REGULATORS FOR NOTEBOOK SYSTEM POWER
The TPS51120 is a highly sophisticated dual current mode synchronous step-down controller. It is a full featured controller designed to run directly
off a three- or four-cell Li-ion battery and provide high-power and 5-V and/or 3.3-V standby regulation for all the downstream circuitry in a
notebook computer system. High current, 100-mA, 5-V or 3.3-V on-board linear regulators have glitch-free switch over function to SMPS and can
be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current
mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at
light-load condition.
STANDBY REGULATORS FOR NOTEBOOK SYSTEM POWER
The TPS51120 is a highly sophisticated dual current mode synchronous step-down controller. It is a full featured controller designed to run directly
off a three- or four-cell Li-ion battery and provide high-power and 5-V and/or 3.3-V standby regulation for all the downstream circuitry in a
notebook computer system. High current, 100-mA, 5-V or 3.3-V on-board linear regulators have glitch-free switch over function to SMPS and can
be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current
mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at
light-load condition.
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