Texas Instruments TPS56C20

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.

Features

• 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™

Typical applications

• High Density Power Distribution Systems
• SoC Processors
• Digital TVs, Set Top Boxes (STB, DVD/Blu-ray Player, Cable/Satellite Modem)

More information

• Datasheet
• IC product information