Datasheet R1525x for Automotive Applications (Ricoh) - 10

R1525x
NO. EC-520-190109
THEORY OF OPERATION Thermal Shutdown
When the junction temperature of this device exceeds 160°C (Typ.), the built-in thermal shutdown circuit stops the regulator operation. After that, when the temperature drops to 135°C (Typ.) or lower, the regulator restarts the operation. Unless eliminating the overheating problem, the regulator turns on and off repeatedly and a pulse shaped output voltage occurs as result.
APPLICATION INFORMATION Typical Applications
VDD VOUT VOUT CIN
R1525x
COUT CE GND CE Control CIN = Ceramic 0.1 µF COUT = Ceramic 0.1 µF
R1525x Typical Applications Typical Application for IC Chip Breakdown Prevention
When a sudden surge of electrical current travels along the VOUT pin and GND due to a short-circuit, electrical resonance of a circuit involving an output capacitor and a short circuit inductor generates a negative voltage and may damage the device or the load devices. Connecting a schottky diode (D1) between the VOUT pin and GND has the effect of preventing damage to them. VDD VOUT VOUT CIN
R1525x
COUT D1 CE GND CE Control CIN = Ceramic 0.1 µF COUT = Ceramic 0.1 µF
R1525x Typical Application for IC Chip Breakdown Prevention
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