SLVAF64A July   2021  – November 2022 TPS62800 , TPS62801 , TPS62802 , TPS62806 , TPS62807 , TPS62808 , TPS62864 , TPS62865 , TPS62866 , TPS62867 , TPS62868 , TPS62869 , TPSM82810 , TPSM82813 , TPSM82816 , TPSM82864A , TPSM82866A , TPSM82866C , TPSM8287A06 , TPSM8287A10 , TPSM8287A15

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Standard Device Operation: Resistance Measurement and Digital Input
  5. 3TPS62864/6/8/9: VSET/VID Pin
  6. 4TPS62800/1/2/6/7/8: VSEL/MODE Pin
  7. 5TPS62865/7 and TPSM82864/6A: VSET/MODE Pin
  8. 6Summary
  9. 7Revision History

6 Summary

Table 6-1 includes the summary of the described ICs and the preferred solutions to achieve the pin's secondary function. Achieving this second function is not required in some applications.

Table 6-1 Summary Table
Device Preferred Solution
TPS62864/6 and TPS62868/9 (VSET/VID) GPIO driving to achieve VID function
(see Section 3):
VSET/VID = LOW → HIGH
TPS62800/1/2/6/7/8 (VSEL/MODE) GPIO driving to achieve MODE function
(see Section 4):
VSEL/MODE = LOW → HIGH
TPS62865/7 (VSET/MODE) VSET/MODE = HIGH to achieve forced PWM
Use FB resistor divider (see Section 5)
TPSM82864/6A (VSET/MODE) VSET/MODE = HIGH to achieve forced PWM
Use FB resistor divider (see Section 5)
TPS62901/2/3 (MODE/S-CONF) MODE/S-CONF = HIGH to achieve forced PWM
Use FB resistor divider (same implementation as section Section 5)

Looking at the TI portfolio, the use of Multi-function Pins is not limited to the selection of the operationg mode (PFM/PWM or forced PWM), but it has been used for a wide variety of features.

Table 6-2 reports some of the other TI Buck Converters with Multi-function Pins.

Table 6-2 Other TI Buck Converters with Multi-function Pins
Device Multi-function Pins
TPS62810/1/2/3/6-Q1
  • MODE/SYNC: PFM/PWM (LOW), forced PWM (HIGH); the pin can be used to synchronize to an external frequency.
  • COMP/FSET: a resistor defines the compensation of the control loop as well as the switching frequency if not externally synchronized.
TPSM82810/3
  • MODE/SYNC: PFM/PWM (LOW), forced PWM (HIGH); the pin can be used to synchronize to an external frequency.
  • COMP/FSET: a resistor defines the compensation of the control loop as well as the switching frequency if not externally synchronized.
TPS62912/3
  • EN/SYNC: Disable (LOW), Enable (HIGH); the pin can be used to synchronize to an external frequency.
  • S-CONF: the pin is used to select switching frequency, spread spectrum, output discharge and synchronization range.