See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

RHB | 32

Temp:

I (-40 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

TPS51120RHBT


Dual Current Mode, Synch Step-Down Controller With 100-mA Standby Reg For Notebook System Power

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750 - 999 $ 3.06
1000 - 9999 $ 2.64

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Texas Instruments TPS51120RHBT

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 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. Optional D-CAP mode operation optimized for SP-CAP or POSCAP output capacitors allows further reduction of external compensation parts. Dynamic UVP supports VIN line sag without latch off by hitting 5-V UVP. No negative voltage appears at output voltage node during UVLO, UVP, and OCP, OTP or loss of VIN.

The TPS51120 32-pin QFN package is specified from –40°C to 85°C ambient temperature.

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