STMicroelectronics L4987CPT120

Description
The L4987 is a very low drop regulator available in PPAK. Its low drop-voltage (0.5 V Max at 200 mA) and low quiescent current make it suitable for low noise, low power applications, and battery-powered systems. The input dump protection up to 4C V makes it ideal for automotive applications.
A shutdown Logic Control function is available (pin 2, TTL compatible). This means that when the device is used as a local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption.
The regulator employs an output pin (open collector) providing a logic signal when the pass transistor is in saturation at low output voltage. This signal can be used to prevent the pop-up phenomenon in car radios. In battery-powered systems (e.g., cellular phones), it is possible to use the battery charge status to monitor the dropout of the regulator.

Features
Very low dropout voltage (0.25 V typ.)
Dropout control flag
Very low quiescent current (Typ. 90 mA in OFF Mode, 500 mA in ON Mode)
Output current up to 200 mA
Logic-controlled electronic shutdown
Output voltages of 3.3V, 5V
Internal current and thermal limit
Only 2.2 µF for stability
Available in ± 2% selection at 25°C
Supply voltage rejection: 70 dB (typ.)

Applications
Automotive applications
Battery-powered systems
Local regulators
Low noise, low power applications