Fixed LDO Voltage Regulator 3.3V 0.5A TO-252-3

The Fixed LDO Voltage Regulator features an inhibit function and a stable 3.3V output. Designed with very low quiescent current, this regulator is particularly well-suited for low-noise, low-power applications, especially those relying on battery-powered systems.

In the 5-pin configuration (PPAK), a shutdown logic control function is available via pin 2, which is TTL compatible. When utilised as a local regulator, this feature allows specific sections of the board to be placed in standby mode, effectively decreasing total system power consumption. In the 3-terminal configuration, the device maintains the same electrical performance but remains fixed in the ON state.

Key Features and Benefits

• Low Dropout: Very low drop-out voltage of 0.45V
• Low Quiescent Current: Typical 50µA in OFF mode and 500µA in ON mode
• Output Current: Capable of delivering up to 500mA
• Shutdown Control: Logic-controlled electronic shutdown
• Protection: Internal current and thermal limiting
• Precision: Available in ±1% (AB) or ±2% (C) selection at 25°C
• Stability: Requires only a 2.2µF capacitor, saving valuable board space and reducing costs
• Noise Rejection: 80dB (typical) supply voltage rejection

This surface-mount regulator is an efficient choice for power management solutions where space, power efficiency, and reliable performance are critical.