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LD2981
Very Low Drop Voltage Regulators with Inhibit
 
LD2981 photoHoused in SOT23-5L the LD2981 series of Low Drop Regulators are direct replacements of National's well known LP2981. The ultra low drop-voltage and the ultra low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. Shutdown Logic Control function is available on pin 3 (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.

Features
Ultra low dropout voltage (200mV typ. at 100mA Load, 7mV at 1mA load).
Very low quiescent current (less than 1µA when in shutdown mode).
Output current up to 100mA.
Logic-controlled electronic shutdown.
Output voltage of : 2.85V, 3.0V, 3.2V, 3.3V, 3.8V, 4.85V, 5.0V.
Internal current and thermal limit.
Output voltage accuracy 0.75% ("A" version).
Output low noise voltage 160µV RMS.
Only 4.7µF for stability.
Temperature range: -40°C to 125°C.
Smallest package SOT23-5L.
Fast dynamic response to line and load changes.

Application Circuit
LD2981 typical application circuit
LD2981 application circuit

SOT23-5L Pin Configuration
Pin No. Symbol Name and Function
1 Vin Input Voltage
2 GND Ground
3 INHBIT Control switch On/Off
4 N C Not to be connected
5 Vout Output voltage
SOT23-5L pin configuration
SOT23-5L pin configuration
LD2980 block diagram
LD2981 block diagram

Related Topics
Product Selector and Datasheets
Linear Regulators
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