2 layers84 × 85 mm
L78L33ACU
STMicroelectronicsExtended
0℃~+125℃@(Tj) 1 1.7V 100mA 3.3V 30V 40uV 49dB@(120Hz) 6mA Fixed Over Current Protection、Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS
- Part id
- st/L78L33ACU
- Category
- Voltage Regulators, Linear, Low Drop Out (LDO) Regulators
- Package
- SOT-89-3
- Pins
- 4
- In stock
- 358,387 at JLCPCB (C14170)
- Used on
- 12 open-source boards
Overview
The L78L33ACU 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 3.3V 30V 40uV 49dB@(120Hz) 6mA Fixed Over Current Protection、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 (Regulators:REG3 1OUT-2GND-3IN, from CERN's library) and its footprint (Package_TO_SOT_SMD:SOT-89-3, from KiCad's library), ready for a KiCad board. 358,387 are in stock at JLCPCB (part C14170). 12 open-source boards in 11 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
10- Supply, least
- 5.3 V · VI, min operating input at IO = 1 to 40 mA · p. 15
- Supply, most
- 20 V · VI, max operating input at IO = 1 to 40 mA · p. 15
- Supply, absolute maximum
- 30 V · VI, absolute max for VO = 3.3 to 9 V · p. 5
- Junction, hottest
- 125 °C · AC operating junction temperature, max · p. 15
- Takes working
- 6 mA · quiescent current, VI = 8.3 V, IO = 40 mA, TJ = 25 °C, max · p. 15
- Gives
- 100 mA · continuous output current, max with adequate heat sink · p. 1
- Output
- 3.3 V · fixed output, TJ = 25 °C, typical · p. 15
- Dropout
- 1.7 V · IO = 40 mA, typical · p. 15
- Junction to air (SOT-89)
- 55 K/W · junction to ambient, 6 cm² copper board heat sink, max · p. 5
- Junction to case (SOT-89)
- 15 K/W · junction to case, max · p. 5
- 2 layers22.9 × 11.4 mm
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Questions
Is there a KiCad symbol and footprint for the L78L33ACU?
Yes. The symbol is Regulators:REG3 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 L78L33ACU?
SOT-89-3, with 3 pins. Its footprint is drawn on this page.
Where is the L78L33ACU datasheet?
STMicroelectronics publishes it: the Datasheet link on this page opens it.
Where can I order the L78L33ACU?
JLCPCB lists it as part C14170, with 358,387 in stock; the sellers' links on this page open their listings.
What can replace the L78L33ACU?
Parts like it in the library: the AMS1117-3.3S by UMW, the HT7533-1 by UMW, the AMS1117-3.3 by GOODWORK and the CJA1117B-3.3 by Jiangsu Changjing Electronics Technology (CJ). Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the L78L33ACU?
12 boards in 11 repositories on GitHub; the most starred are listed on this page, with their KiCad files.