L78L18ACUTR

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L78L18ACUTR

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IC REG LINEAR 18V 100MA SOT89-3

  • HerstellerSTMikroelektronik

  • Herstellerteil #L78L18ACUTR

  • Paket TO-243AA

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Spezifikationen

Attribut Wert
Package / Case Tape & Reel (TR),Cut Tape (CT)
Part Status Active
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 40V
Voltage - Output (Min/Fixed) 18V
Current - Output 100mA
Current - Quiescent (Iq) 6 mA
Current - Supply (Max) 6.5 mA
PSRR 38dB (120Hz)
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature 0°C ~ 125°C
Mounting Type Surface Mount

Übersicht

Description

The L78L18ACUTR is a fixed 18 V positive linear regulator from ST’s L78L family (low-current). It provides a stable 18 V output from a higher input, typically up to about 25–30 V, with a maximum load current around 100 mA. It includes built‑in protection (thermal shutdown, current limit) and requires external capacitors for stability (example: input ~0.33 µF, output ~0.1 µF). Pinout (front view, left to right): Input, Ground, Output. The “CUTR” suffix denotes a tape‑and‑reel SMT package variant. Typical use: small boards needing a regulated 18 V rail from a higher-voltage source (sensors, peripherals, embedded electronics).

Equivalent

Equivalents (1.8 V fixed, ~100 mA, similar):
- LM78L18 / LM78L18A
- KA78L18
- NCP78L18 (Onsemi)
- LD1117-1.8
- AMS1117-1.8
Note: pinouts and packages differ; always verify datasheets and cross‑reference to ensure correct footprint and wiring.

Features

- Fixed 1.8 V output
- Maximum output current around 100 mA
- Input voltage range up to 20 V
- Internal current limit
- Thermal/shutdown protection
- Safe-area protection
- Low quiescent current (efficient in standby)
- Requires input and output capacitors for stability
- Tape & Reel packaging variant available (CUTR) for automated assembly

Pinout

- Pin count: 3 pins
- Function: Fixed positive voltage regulator (L78L18A) that provides a regulated +18 V output from a higher input, typically up to ~30 V, with a small output current capability (about 100 mA). It is a 3-terminal regulator (Vin, GND, Vout).

Manufacturer

Manufacturer: STMicroelectronics (ST).
What kind of company: STMicroelectronics is a multinational semiconductor and electronics company that designs, manufactures, and sells a wide range of integrated circuits, discrete semiconductors, sensors, and power-management devices. It is headquartered in Geneva, Switzerland, and is one of the world’s largest semiconductor companies.

Application

L78L18ACUTR is a fixed +18 V low‑current regulator. Typical application areas:
- Low‑power fixed 18 V supply for microcontrollers, digital logic, and analog circuits
- Simple pre‑regulator stage from higher DC inputs in hobbyist/industrial boards
- Power rails for sensors, op-amps, and small instrumentation
- LED driver circuits and small motor control assets requiring an 18 V rail
- Prototyping, educational kits, and compact consumer electronics
Note: suitable where heat dissipation is modest due to its limited output current (≈tens to low hundreds of mA).

Package

TO-92 (three-lead) plastic through-hole package; L78L18ACUTR is the TO-92 version, with Tape & Reel packaging (CUTR suffix).

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