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Common three-terminal voltage regulator integrated circuits (ICs) in switching power supplies include the positive voltage output 78xx series and the negative voltage output 79xx series. As the name implies, a three-terminal IC refers to this type of voltage regulator IC, which has only three pins: the input, ground, and output.
Using 78 series three-terminal voltage regulatorICs to form a regulated power supply requires very few external components, and the internal circuitry includes overcurrent, overheat, and regulator protection circuits. This makes it reliable, convenient, and cost-effective to use.
78M15 is a fixed positive voltage regulator with three terminals, offering a fixed output voltage of 15V/18V. Its capability to output a fixed voltage makes it widely applicable.78M15 series internally integrate overcurrent protection, thermal shutdown, and power limitation features, ensuring that it is inherently damage-proof. With adequate heat dissipation, the circuit can work continuously under a current of 0.5A.
Output current: 0.5A
Output voltage: 15V/18V
Thermal overload protection
Short circuit protection
Output transistor SOA protection
Package types:TO-220, TO-220FP, DPAK or SOT-223
DC input voltage(VO=5~18V) VI :35V
DC input voltage(VO=20,24V) VI :40V
Output current IO :0.5A
Storage temperature range Tstg :-65~+150℃
Operating junction temperature range Top :0~+150℃
(Unless otherwise specified, 0≤TJ≤+125℃, IO=350mA, CI=0.33μF, CO=0.1μF)
Notes:
"VXX" defines the output voltage, replace the value with XX.
No output capacitor is needed here to achieve voltage regulation; it is used to improve transient response.
If the regulator is placed far from the power supply filter, then CI needs to be added.
Various voltage regulation circuits
