TPS51120 Series
4.5-V to 28-V, dual-channel synchronous buck controller with low standby current consumption
Manufacturer: Texas Instruments
Catalog
4.5-V to 28-V, dual-channel synchronous buck controller with low standby current consumption
Key Features
• 3.3-V and 5-V 100-mA Bootstrapped StandbyRegulators with Independent EnablesSelectable D-CAP™ Mode Enables Fast TransientResponse Less than 100 nsSelectable Low Ripple Current ModeLess than 1% Internal Reference AccuracySelectable PWM-only/Auto-skip ModesLow-side RDS(on)Loss-less Current SensingRSENSEAccurate Current Sense OptionInternal Soft-Start and Integrated VOUTDischargeTransistorsIntegrated 2-V ReferenceAdaptive Gate Drivers with Integrated Boost DiodePowergood for Each Channel with Delay TimerFault Disable ModeSupply Input Voltage Range: 4.5 V to 28 V3.3-V and 5-V 100-mA Bootstrapped StandbyRegulators with Independent EnablesSelectable D-CAP™ Mode Enables Fast TransientResponse Less than 100 nsSelectable Low Ripple Current ModeLess than 1% Internal Reference AccuracySelectable PWM-only/Auto-skip ModesLow-side RDS(on)Loss-less Current SensingRSENSEAccurate Current Sense OptionInternal Soft-Start and Integrated VOUTDischargeTransistorsIntegrated 2-V ReferenceAdaptive Gate Drivers with Integrated Boost DiodePowergood for Each Channel with Delay TimerFault Disable ModeSupply Input Voltage Range: 4.5 V to 28 V
Description
AI
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.
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.
