The STAB (stability) pin of the TPS7H1121 is designed to provide direct access to the controller's error amplifier; insertion into the LDO's control circuitry facilitates detailed stability analysis and fine tuning of the LDO's stability performance.

The TPS7H1121 has a wide envelope in which typical gain and phase margin is in excess of 6dB and 50º (with output capacitance ranging from 22μF ≤ C_OUT ≤ 220μF). However, external compensation is provided via the STAB pin in which the R_COMP and C_COMP network can be utilized to further optimize the stability performance of the TPS7H1121 if desired. TI recommends that an external network is applied for low C_OUT applications or for special concerns in which maximum stability margin is necessary. For further details on how to implement Type II and III Compensation, view section Section 9.2.2.9 or SLVA662.