TPS51125RGER

製品の特徴：

FEATURE

• Wide Input Voltage Range: 5.5 V to 28 V 

• Output Voltage Range: 2 V to 5.5 V 

• Built-in 100-mA 5-V/3.3-V LDO with Switches

• Built-in 1% 2-V Reference Output

• With/Without Out-of-Audio™ Mode Selectable

Light Load and PWM only Operation

• Internal 1.6-ms Voltage Servo Softstart

• Adaptive On-Time Control Architecture with

Four Selectable Frequency Setting

• 4500 ppm/°C RDS(on) Current Sensing

• Built-In Output Discharge

• Power Good Output

• Built-in OVP/UVP/OCP

• Thermal Shutdown (Non-latch)

• QFN24 (RGE)

APPLICATIONS

• Notebook Computers

• I/O Supplies

• System Power Supplies

DESCRIPTION


The TPS51125 is a cost effective. dual-synchronous buck controller targeted for notebook system power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 270-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter's efficiency. The TPS51125 supports high efficiency, fast transient response and provides a combined power-good signal. Out-of-AudioT mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAPTm control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V.The TPS51125 is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.

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