Datasheet Texas Instruments TPS51120RHBT — Datenblatt

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SLUS670C – JULY 2005 – REVISED JANUARY 2015 TPS51120 Dual, Synchronous Step-Down Controller With 100-mA Standby Regulators for
Notebook System Power
1 Features 3 Description The TPS51120 is a highly sophisticated dual,
synchronous step-down controller. It is a full featured
controller designed to run directly off a three-or fourcell 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. Optional D-CAP mode operation
optimized for SP-CAP or POSCAP output capacitors …