1 Features

1• D-CAP2™ Control

– Input Voltage Range: 4.5V to 17V

– Switching Frequency: 500kHz

– Optimized for a 1.0μH to 2.2μH Inductor

• ±1% Output Voltage Accuracy

• Features via I2C Compatible Interface

– Output Voltage (VID): 0.6V to 1.87V in 10mV

– Auto-Skip Eco-mode™ ON/OFF (Light-load)

– Current Limit Target: 40% to 160%

– Enabling IC, Reading-back Power-good

– Hiccup Mode Protection ON/OFF

• IC Terminal Features

– Start-up by Using External Resistors

Output Voltage with VFB Pin: 0.6V to 1.87V

– Adjustable Soft-start,

Monotonic Pre-Biased Start-up

– Power-good

– I2C Address Programming (2bits)

• Cycle-by-Cycle Overcurrent Limiting Control

• Thermal Shutdown (TSD)

• Undervoltage Lockout (UVLO)

• TSSOP Package (PWP) with PowerPAD™

2 Applications

• Media Processors for Consumer Applications:

Digital TVs, Set Top Boxes (STB, DVD/Blu-ray

Player, Cable/Satellite Modem)

• SoC Processors

• High Density Power Distribution Systems

3 Description

The TPS56X20 is a synchronous DC-DC converter IC

(integrated circuit) with a voltage scaling control to

power up micro-processors (MCUs) requiring core

voltage (VCORE) tune-ups. After the initial power-up,

the output voltage can be programmed/scaled by VID

codes sent over an I2C compatible bus.

This step-down (buck) converter employs an adaptive

on-time D-CAP2 mode control which provides a very

fast transient response with no external components.

Unlike traditional voltage-/current-mode controls, the

D-CAP2 supports seamless transition between PWM

mode for higher load and Eco-mode™ for light load.

Eco-mode maintains high efficiency in light-load.