深圳市谷科智电子有限公司

1 Features 3 Description

The TPS51125 is a cost-effective, dual-synchronous 1• Wide Input Voltage Range: 5.5 V to 28 V

buck controller targeted for notebook system power

• Output Voltage Range: 2 V to 5.5 V supply solutions. The device provides 5-V and 3.3-V

• Built-In 100-mA, 5-V and 3.3-V LDO With LDOs and requires few external components. The

Switches 270-kHz VCLK output can be used to drive an

• Built-In 1% 2-V Reference Output external charge pump, thus generating gate drive

voltage for the load switches without reducing the

• With or Without Out-of-Audio™ Mode Selectable efficiency of the main converter. The TPS51125 Light-Load and PWM-Only Operation supports high-efficiency, fast-transient response and

• Internal 1.6-ms Voltage Servo Soft-Start provides a combined power-good signal. Out-of-

• Adaptive On-Time Control Architecture With Four Audio mode light-load operation enables low acoustic

Selectable noise at much higher efficiency than conventional Frequency Setting

forced PWM operation. Adaptive on-time D-CAP™ • 4500 ppm/°C RDS(on) Current Sensing control provides convenient and efficient operation.

• Built-In Output Discharge The part operates with supply input voltages ranging

• Powergood Output 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

• Built-In OVP/UVP/OCP QFN package and is specified from -40°C to 85°C

• Thermal Shutdown (Nonlatch) ambient temperature range.

• QFN, 24-Pin (RGE)

Device Information(1)

2 Applications PART NUMBER PACKAGE BODY SIZE (NOM)

• Notebook Computers TPS51125 VQFN (24) 4.00 mm x 4.00 mm

(1) For all available packages, see the orderable addendum at • I/O Supplies

the end of the datasheet.

• System Power Supplies

S