1FEATURES

23• Differential Voltage Feedback

• DC Compensation for Accurate Regulation

• Wide Input Voltage Range: 3 V to 28 V

• Output Voltage Range: 0.5 V to 2.0 V with

Fixed Options of 1.05 V and 1.00 V

• Wide Output Load Range: 0 A to 20 A+

• Adaptive On-Time Modulation with Selectable

Control Architecture and Frequency

– D-CAP™ Mode at 300 kHz/400 kHz for Fast

Transient Response

– D-CAP2™ Mode at 500 kHz/670 kHz for

Ceramic Output Capacitor

• 4700 ppm/°C, Low-Side RDS(on) Current Sensing

• RSENSE Accurate Current Sense Option

• Internal, 1-ms Voltage Servo Softstart

• Built-In Output Discharge

• Power Good Output

• Integrated Boost Switch

• Built-In OVP/UVP/OCP

• Thermal Shutdown (Non-latched)

• 3 mm × 3 mm, 16-Pin, QFN (RTE) Package

APPLICATIONS

• Notebook Computers

• I/O Supplies

DESCRIPTION

The TPS51219 is a small-sized single buck controller

with adaptive on-time control. It provides a choice of

control modes (D-CAP™ or D-CAP2™) to meet a

wide range of system requirements. It is designed for

tight DC regulation requirements such as the VCCIO

application for Intel® notebooks. The performance

and flexibility of the TPS51219 makes it suitable for

low output voltage, high current, PC system power

rails and similar point-of-load (POL) power supplies.

Differential voltage feedback and the voltage

compensation function combine to provide high

precision power to load devices.

A small package, fixed voltage options and minimal

external component count saves cost and space,

while a dedicated EN pin and pre-set frequency

selections minimize design effort. The skip-mode at

light load condition, strong gate drivers, and low-side

FET RDS(on) current sensing provides high efficiency

operation over a broad load range. The external resistor current sense option enables accurate

current sensing. The conversion input voltage (the

high-side FET drain voltage) ranges from 3 V to 28 V

and output voltage ranges from 0.5 V to 2.0 V. The

device requires an external 5-V supply.

The TPS51219 is available in a 16-pin, QFN package and is specified for ambient temperature from -40°C

to 85°C.