1 Features

? Input voltage range (VI):

– 4.75 V to 35 V (for legacy chip)

– 4.75 V to 45 V (for new chip)

? Output voltage range (VO):

– 2.6 V to 15 V (for legacy chip)

– 3.3 V to 15 V (for new chip)

? Output current: Up to 100 mA

? Quiescent current IQ: 3.8 mA

? Built-in short-circuit current limiting and thermal

protection

? Stable without any external component

? Supported temperature range:

– Legacy chip C and AC versions: 0°C to +125°C

– Legacy chip AI version: –40°C to +125°C

– New chip: –40°C to +125°C

? Packages:

– 8-pin, 4.9-mm × 3.91-mm SOIC

– 3-pin, 4.3-mm × 4.3-mm TO-92

– 3-pin, 4.5-mm × 2.5-mm SOT-89

? M3-suffix devices are Advance Information devices

2 Applications

? Motor drives

? Appliances

? Building automation

? Flow transmitters

? Factory automation and control

3 Description

The UA78L series of fixed-voltage linear regulators is

designed for a wide range of applications. The UA78L

series can be used for on-card regulation to eliminate

the noise and distribution problems associated with

single-point regulation. The UA78L can also be

used with power-pass elements to make high-current

voltage regulators. The UA78L series regulators can

deliver up to 100 mA of output current. Additionally,

the UA78L does not need an external capacitor

for stable operation across the load current range.

The internal current-limiting and thermal-shutdown

features of these regulators help protect the device

from overload.

For the legacy chip, the UA78L00C and UA78L00AC

series are characterized for the junction temperature

range of 0°C to +125°C and the UA78L05AI device

is characterized for the operating junction temperature

range of –40°C to +125°C.

For the new chip, the UA78L series is characterized

for the junction temperature range of –40°C to

+125°C.

UA78L12ACPKG3屬于集成電路（IC） > 線性 + 開關(guān)穩(wěn)壓器。美國德州儀器公司制造生產(chǎn)的UA78L12ACPKG3穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負(fù)載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。