DESCRIPTION
●The TPS51123 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.
●FEATURES
●• 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)
●• 24-Pin QFN (RGE) Package
●APPLICATIONS
●• Notebook Computers
●• I/O Supplies
●• System Power Supplies
