Texas Instruments TPS51125
The TPS51125 is a cost-effective, dual-synchronous buck controller targeted for notebook system power supply solutions. The device 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, thus generating gate drive voltage for the load switches without reducing the efficiency of the main converter.| Part No. | TPS51125 |
|---|---|
| Datasheet | TPS51125 Download |
| Manufacturer |  Texas Instruments |
| Description | Step-Down Controller |
| Buy | Stock & Price |
FEATURES
●1 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 and 3.3-V LDO With Switches
● Built-In 1% 2-V Reference Output
● With or Without Out-of-Audio™ Mode Selectable Light-Load and PWM-Only Operation
● Internal 1.6-ms Voltage Servo Soft-Start
● Adaptive On-Time Control Architecture With Four Selectable Frequency Setting
● 4500 ppm/°C RDS(on) Current Sensing
● Built-In Output Discharge
● Powergood Output
● Built-In OVP/UVP/OCP
● Thermal Shutdown (Nonlatch)
● QFN, 24-Pin (RGE) 2
APPLICATIONS
● Notebook Computers● I/O Supplies
● System Power Supplies 3
DESCRIPTION
The TPS51125 supports high-efficiency, fast-transient response and provides a combined power-good signal. Out-ofAudio 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.
