4.5 Power Management Overview

The IC has four power domains:

  1. VS – Unregulated battery voltage input
  2. DVCC – Internally regulated digital supply voltage. Typical value is 1.35V.
  3. AVCC – Internally regulated RF front end and XTO supply. Typical value is 1.85V.
  4. VS_PA – Power amplifier supply: Depending on the battery voltage range (VS), the following application modes are available:
    • Connected externally to the battery in 3V applications (VS = VS_PA = 1.9-3.6V)
    • Generated by an internal 3V regulator
      • VS = 3.2-5.5V; VS_PA = 3V
      • VS = 1.9-3.2V; VS_PA = VS – 200 mV
    • Generated by an internal 2.2V regulator in 3V/5V applications
      • VS = 2.4-5.5V; VS_PA = 2.2V
      • VS = 1.9-2.4V; VS_PA = VS – 200 mV

Operate the ATA8510/15 from VS = 1.9-3.6V (3V application) and from VS = 2.4-5.5V (5V application); program the Operating mode in the SUPCR.PVEN.

Figure 4-6. Power Supply Management