What are the key design considerations for Low-Dropout (LDO) regulators?

Key LDO considerations include: Dropout voltage (minimum Vin-Vout for regulation, typically 100-500mV), Quiescent current (affects battery life in portable devices), Load regulation (output change vs load current), Line regulation (output change vs input voltage), PSRR (power supply rejection ratio for noise immunity), Transient response (stability with varying loads), and Output capacitor requirements (ESR affects stability). Trade-offs exist between dropout, quiescent current, and transient response.