Skip to the content
PCBKitNew board
L78L18ACU, in 3D

L78L18ACU

STMicroelectronics

0℃~+125℃@(Tj) 1 1.7V 100mA 120uV 18V 38dB@(120Hz) 40V 6.5mA Fixed Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS

Extended
DatasheetJLCPCBLCSCst/L78L18ACU
Category
Voltage Regulators Linear, Low Drop Out (LDO) Regulators
Package
SOT-89-3
Pins
3

Overview

The L78L18ACU is a voltage Regulators Linear, Low Drop Out (LDO) Regulator made by STMicroelectronics in a SOT-89-3 package with 3 pins. 0℃~+125℃@(Tj) 1 1.7V 100mA 120uV 18V 38dB@(120Hz) 40V 6.5mA Fixed Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS.

PCBKit's library has its KiCad symbol (Pinmap_Generic:Regulator_Linear_1OUT_2GND_3IN, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_SMD:SOT-89-3, from KiCad's library), ready for a KiCad board. 760 are in stock at JLCPCB (part C2802523).

Symbol

IN3OUT1GND2
Pinmap_Generic:Regulator_Linear_1OUT_2GND_3INFrom PCBKit's generic symbols

Footprint

123
Package_TO_SOT_SMD:SOT-89-3From KiCad's library

Parameters

12
Features
Over Current Protection
Noise
120uV
Number of Outputs
1
Operating Temperature
0℃~+125℃@(Tj)
Output Configuration
Positive
Output Current
100mA
Output Type
Fixed
Output Voltage
18V
Power Supply Rejection Ratio (PSRR)
38dB@(120Hz)
Voltage - Supply
40V
Voltage Dropout
1.7V
standby current
6.5mA

Order codes

1

Pinout

3
The pins of the L78L18ACU
PinNameType
1OUTPower out
2GNDPower in
3INPower in

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/st/L78L18ACU" title="L78L18ACU in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/st/L78L18ACU.jpg" alt="L78L18ACU" width="1200" height="900">
A picture that opens the part, for a README
[![L78L18ACU](https://pcbkit.io/embed/parts/st/L78L18ACU.jpg?size=s)](https://pcbkit.io/parts/st/L78L18ACU)

Questions

Is there a KiCad symbol and footprint for the L78L18ACU?

Yes. The symbol is Pinmap_Generic:Regulator_Linear_1OUT_2GND_3IN and the footprint Package_TO_SOT_SMD:SOT-89-3, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the L78L18ACU?

SOT-89-3, with 3 pins. Its footprint is drawn on this page.

Where is the L78L18ACU datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the L78L18ACU?

JLCPCB lists it as part C2802523, with 760 in stock; the sellers' links on this page open their listings.

What can replace the L78L18ACU?

Parts like it in the library: the CJ78L18C-P3T-ARG by Jiangsu Changjing Electronics Technology (CJ), the 78L18 by Shikues, the 78L18G-AB3-R by UTC and the NJM78L18UA-TE1 by Nisshinbo Micro Devices Inc.. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8