TPS51120RHBTG4

TEXAS INSTRUMENTS  TPS51120RHBTG4  直流/直流控制器, 4.5V至28V, 2路输出, 同步降压, 580kHz, VQFN-32

The is a Dual Current Mode Synchronous Step-down Controller with 100mA standby reg for notebook system power. 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 and/or 3.3V standby regulation for all the downstream circuitry in a notebook computer system. High-current 100mA, 5 or 3.3V 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.

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3.3 and 5V 100mA Bootstrapped standby regulators with independent enables

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Selectable D-CAP™ mode enables fast transient response less than 100ns

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Selectable low ripple current mode

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Less than 1% internal reference accuracy

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Selectable PWM-only/auto-skip modes

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Low-side RDS ON loss-less current sensing

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RSENSE accurate current sense option

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Internal soft-start and integrated VOUT discharge transistors

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Integrated 2V reference

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Adaptive gate drivers with integrated boost diode

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Power-Good for each channel with delay timer

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Fault disable mode

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Green product and no Sb/Br

This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.