LM2940QML, LM2940QML-SP
www.ti.com
SNVS389B – MAY 2010 – REVISED MAY 2013
LM2940QML 1A Low Dropout Regulator
Check fo...
LM2940QML, LM2940QML-SP
www.ti.com
SNVS389B – MAY 2010 – REVISED MAY 2013
LM2940QML 1A Low Dropout Regulator
Check for Samples: LM2940QML, LM2940QML-SP
FEATURES
1
2 Available with Radiation Ensure – ELDRS Free 100 krad(Si)
Dropout
Voltage Typically 0.5V @IO = 1A Output Current in Excess of 1A Output
Voltage Trimmed Before Assembly Reverse Battery Protection Internal Short Circuit Current Limit Mirror Image Insertion Protection
DESCRIPTION
The LM2940 positive
voltage regulator features the ability to source 1A of output current with a dropout
voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input
voltage and the output
voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3V).
Designed also for vehicular applications, the LM2940 and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input
voltage can momentarily exceed the specified maximum operating
voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940 cannot be harmed by temporary mirrorimage insertion. Famili...