TPS56x20 Regulator with Voltage Scaling


TI's synchronous DC/DC converter IC with a voltage scaling control

Texas Instruments' 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 1.0 µH to 2.2 µH inductor-saving PCB area.

Features
  • D-CAP2 control
    • Input voltage range: 4.5 to 17 V
    • Switching frequency: 500 kHz
    • Optimized for a 1.0 to 2.2 µH inductor
  • ±1% output voltage accuracy
  • Features via I²C-compatible interface
    • Output Voltage (VID): 0.6 to 1.87 V in 10 mV
    • 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: 0.6 to 1.87 V
    • Adjustable soft-start, monotonic pre-biased start-up
    • Power-good
    • I²C address programming (2 bits)
  • Cycle-by-cycle overcurrent-limiting control
  • Thermal Shutdown (TSD)
  • Undervoltage Lockout (UVLO)

TPS56520 Regulators

Manufacturer Part Number Description Available Quantity Datasheets
TPS56520PWPR IC REG BUCK SYNC ADJ 5A 20HTSSOP 1740

TPS56720 Regulators

Manufacturer Part Number Description Available Quantity Datasheets
TPS56720PWPR IC REG BUCK SYNC ADJ 7A 20HTSSOP 1750

TPS56920 Regulators

Manufacturer Part Number Description Available Quantity Datasheets
TPS56920PWPR IC REG BUCK SYNC ADJ 9A 20HTSSOP 1879