Texas Instruments TPS56520

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.

The TPS56X20 supports both ultra-low ESR ceramic capacitors and low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP. The device is optimized for a small 1.0µH to 2.2µH inductor saving PCB area.

The TPS56X20 devices are available in the HTSSOP package.

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
• Media Processors for Consumer Applications:Digital TVs, Set Top Boxes (STB, DVD/Blu-rayPlayer, Cable/Satellite Modem)
• SoC Processors

More information

• Datasheet
• IC product information