Robust, efficient adjustable voltage regulator with a very low dropout voltage. Quiescent current is extremely low at typically 240µA max.

• Extremely tight load and line regulation
• Very low temperature coefficient
• Protection against reversed battery
• Fold-back current limiting
• Supplied in TO-220-5 package

LDO negative voltage regulator from National Semiconductor .

• Three-terminal regulator
• Low dropout voltage of 0.6V
• Low quiescent current
• Output voltage -12V
• Output current 1.5A
• Voltage accuracy 5%
• Supplyvoltage -26V to 0.3V
• TO-220 case

The MC33269DG series are medium current voltage regulators that, due to their low dropout voltage, are ideal for use in low input voltage applications. The devices are specifically designed to provide a solution for precision voltage regulation, while keeping power losses to a minimum.

The regulators consist of a 1V dropout composite PNP-NPN pass transistor, with current limiting and thermal shutdown.

• 3.3V fixed output
• Typical dropout voltage 1.0V
• Output current in excess of 800mA
• Output trimmed to 1% tolerance
• Thermal protection
• Short circuit protection
• Space saving SO-8 package

ST LD1084V low drop out, adjustable positive voltage regulator. The voltage regulator provides an output current up to 5A. The quiescent current flows into the load for increased efficiency. The LD1084 is pin-to-pin compatible with the older 3-terminal adjustable regulators with improved performance in drop and output tolerance.

• Housed in a TO-220 package
• Requires a 10uF (min.) capacitor for stability
• Pinout compatible with standard adjustable VREG

Low drop out (IV type), fixed voltage regulator from ST. High efficiency is assured by using a NPN pass transistor, which passes most of the quiescent current into the load.

• Requires a 10µF (min.) capacitor for stability
• Housed in TO-220 package

A 3.3V 100mA very low drop-out voltage regulator from ST. The very low drop (0.2V) and matching very low ON quiescent current (0.5mA) make this regulator particularly suitable for low noise, low power applications, especially battery powered equipment.

The IC includes internal current and thermal limit and only requires a 2.2µF capacitor for stability.

• Supply voltage rejection is typically 80dB
• TO-92 package
• Supplied on tape and reel

Low dropout positive fixed voltage regulator, designed for vehicular applications.

• Dropout voltage 0.5V typ. (1V max. over the entire temperature range)
• Output voltage 12V
• Supply voltage 13.6 to 26V
• Low quiescent current
• Output current in excess of 1A
• Protected against reverse battery connection and 2-battery jumps
• Short circuit and thermal overload protection
• Supplied in a plastic TO-220 package

Low dropout positive fixed voltage regulator, designed for vehicular applications.

• Dropout voltage 0.5V typ. (1V max. over the entire temperature range)
• Output voltage 5V
• Supply voltage 6.25 to 26V
• Low quiescent current
• Output current in excess of 1A
• Protected against reverse battery connection and 2-battery jumps
• Short circuit and thermal overload protection
• Supplied in a plastic TO-220 package

Adjustable micro-power voltage regulator from Texas Instruments with extremely low quiescent current and low dropout voltage which needs minimum capacitance for stability, current and thermal limiting.

• Output voltage 5V
• Dropout voltage 50mV
• Output current 100mA
• Supply voltage -0.3V to 30V
• Housed in a TO-92 package
• Suitable for use in battery powered systems