L78LR05 Sanyo Semiconductor Corporation, L78LR05 Datasheet
L78LR05
Available stocks
Related parts for L78LR05
L78LR05 Summary of contents
Page 1
... Ordering number:ENN2622B Overview The L78LR05 is voltage regulator IC that performs the re- set signal generating function when the power supply of a microcomputer system is turned ON/OFF. The L78LR05 is convenient for battery backup system at the time of power failure. The reset threshold voltage V below ...
Page 2
... Equivalent Circuit Block Diagram L78LR05 ...
Page 3
... Reset Operation Sample Application Circuit 2 (Direct battery backup) Since the leakage current at the output pin (pin5) of the L78LR05 is so low less, a backup circuit can be implemented by connectiong an electric double layer capacitor (super capacitor : NEC, gold capacitor : Matsushita Elec- tric battery direct to the output pin. Since a reverse blocking diode, which has been so far connected to the output pin, is not required, a regulated power-supply voltage can be supplied to a load during the steady-state operation, without voltage drop caused by the diode and effects of temperature characteristics, current characteristics of the diode ...
Page 4
... Allowable Power Dissipation The allowable power dissipation is 1.0V (Ta=25 C) with fin attached. When the L78LR05 is surface-mounted on a hybrid IC board or printed circuit board, a high allowable power dissipation can be obtained, though it is placed in a small-sized package. Shown below is the relationship between the Cu-foiled area the allowable power dissipation when the L78LR05 is surface-mounted on a glass epoxy boad ( ...
Page 5
... L78LR05 No.2622–5/6 ...
Page 6
... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of December, 1999. Specifications and information herein are subject to change without notice. L78LR05 PS No.2622–6/6 ...