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L78L18ACUTR

Name: L78L18ACUTR
Rating: 4.7 (12 reviews)

IC REG LINEAR 18V 100MA SOT89-3

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製造商。部分 #L78L18ACUTR
包 TO-243AA
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規格

Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Active
OutputConfiguration	Positive
OutputType	Fixed
NumberofRegulators	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)
ProtectionFeatures	Over Current, Over Temperature, Short Circuit
OperatingTemperature	0°C ~ 125°C
MountingType	Surface Mount
Package/Case	TO-243AA

概述

Description

L78L18ACUTR is a fixed 18 V positive linear voltage regulator from the L78L family (low‑power regulator). It converts a higher DC input to a stable 18 V output for low‑current circuits.
Key points:
- Output: fixed 18 V; typical max load current ≈ 100 mA.
- Input range: up to about 30–35 V (check datasheet for exact limits).
- Dropout: roughly 1–2 V (depends on current and temperature).
- Packages: small three‑terminal packages (TO‑92/SOT‑89); suffix “TR” indicates Tape & Reel packaging.
- Pinout (TO‑92, front view): left = input, middle = ground, right = output (verify for your package).
Usage notes:
- Use input and output decoupling capacitors (e.g., 0.33 μF input, 0.1 μF output) close to the regulator.
- Dissipated power P = (Vin − 18 V) × Iout; provide heat sinking if needed.
Applications: simple, low‑current 18 V supply for sensors, analog circuits, or pre-regulation stages. If 5 V/3.3 V is needed, choose a different L78L variant (e.g., L78L05, L78L33).

Features

L78L18ACUTR features (concise):
- Fixed output: 18 V
- Output current: up to ~100 mA
- Input range: up to about 25 V
- Dropout voltage: ~2 V @ 100 mA
- Three-terminal positive regulator
- Built-in protection: current limit
- Thermal/shutdown protection (overheat protection)
- Short-circuit protection; suitable for compact regulator designs
- Available in common packages (e.g., TO‑92/SOT‑89) and tape/ reel options.

Package

It’s the L78L18A in a TO-92 three-pin plastic package, with Tape & Reel packaging (CUTR suffix indicates TR packaging).

Pinout

Pin count: 3 pins.
Function: A positive fixed voltage regulator (L78L18 family) with an 18 V output. It regulation from a higher input voltage to a stable 18 V, with input, ground, and output pins.

Manufacturer

- Manufacturer: STMicroelectronics (ST).
- What kind of company: A multinational semiconductor company that designs, manufactures, and markets integrated circuits and other electronic components; headquartered in Geneva, Switzerland.

Application

- Automotive electronics (ECUs, body controllers, sensors)
- Industrial control and instrumentation
- Consumer electronics requiring an 18 V rail
- Embedded systems and prototyping as a simple 18 V regulator or pre-regulator for DC-DC converters
Note: L78L18ACUTR is a fixed 18 V regulator (≈100 mA), suitable for applications needing a stable 18 V supply from higher voltages.

Equivalent

Equivalent devices (18V fixed, ~100 mA 3-terminal regulators in the 78L family):
- LM78L18 (TI/National)
- MC78L18 (ON Semiconductor)
- KA78L18 (Renesas/others)
- XC78L18 (Torex)
Note: pinouts and package types vary; verify datasheets for input/ground/output pins and current ratings before cross-referencing.