TPS51123

用于笔记本系统电源的兼具 Out-of-Audio 操作和 100mA LDO 的双路同步降压控制器

The 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 TPS51123 supports high efficiency, fast transient responses and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP 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 TPS51123 is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.

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Wide-Input Voltage Range: 5.5 V to 28 V

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Output Voltage Range: 2 V to 5.5 V

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

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Built-in 1% 2-V Reference Output

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With/Without Out-of-Audio™ Mode Selectable

Light-Load and PWM only Operation

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Internal 1.6-ms Voltage Servo Softstart

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Adaptive On-Time Control Architecture with Four

Selectable Frequency Setting

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4500 ppm/°C RDSon Current Sensing

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Built-In Output Discharge

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Power Good Output

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Built-in OVP/UVP/OCP

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Thermal Shutdown Non-latch

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24-Pin QFN RGE Package