Description
The TPS51123A 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 TPS51123A 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 a 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 TPS51123A is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.
Features
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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 Soft-Start
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- Adaptive On-Time Control Architecture with Four Selectable Frequency Setting
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- 4500 ppm/°C RDS(on) 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
