LM78S40CN/NOPB
Active1.5A ADJUSTABLE STEP UP, STEP DOWN OR INVERTING REGULATOR
LM78S40CN/NOPB
Active1.5A ADJUSTABLE STEP UP, STEP DOWN OR INVERTING REGULATOR
Description
General part information
LM78S40 Series
The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for switching regulator systems. The device consists of a temperature compensated voltage reference, a duty-cycle controllable oscillator with an active current limit circuit, an error amplifier, high current, high voltage output switch, a power diode and an uncommitted operational amplifier. The device can drive external NPN or PNP transistors when currents in excess of 1.5A or voltages in excess of 40V are required. The device can be used for step-down, step-up or inverting switching regulators as well as for series pass regulators. It features wide supply voltage range, low standby power dissipation, high efficiency and low drift. It is useful for any stand-alone, low part count switching system and works extremely well in battery operated systems.
The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for switching regulator systems. The device consists of a temperature compensated voltage reference, a duty-cycle controllable oscillator with an active current limit circuit, an error amplifier, high current, high voltage output switch, a power diode and an uncommitted operational amplifier. The device can drive external NPN or PNP transistors when currents in excess of 1.5A or voltages in excess of 40V are required. The device can be used for step-down, step-up or inverting switching regulators as well as for series pass regulators. It features wide supply voltage range, low standby power dissipation, high efficiency and low drift. It is useful for any stand-alone, low part count switching system and works extremely well in battery operated systems.
Technical Specifications
Parameters and characteristics for this part
| Specification | LM78S40CN/NOPB |
|---|---|
| Current - Output | 1.5 A |
| Frequency - Switching (Max) | 100 kHz |
| Frequency - Switching (Min) | 100 Hz |
| Function | Step-Up, Step-Down |
| Mounting Type | Through Hole |
| Number of Outputs | 1 |
| Operating Temperature (Max) | 70 °C |
| Operating Temperature (Min) | 0 °C |
| Output Configuration | Positive or Negative, Positive, Negative |
| Output Type | Adjustable |
| Package Length | 0.3 in |
| Package Name | 16-DIP, 16-PDIP |
| Package Width | 7.62 mm |
| Synchronous Rectifier | No |
| Topology | Buck, Boost |
| Voltage - Input (Max) | 40 V |
| Voltage - Input (Min) | 2.5 V |
| Voltage - Output (Max) | 40 V |
| Voltage - Output (Min/Fixed) | 1.25 V |
Pricing
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