1 Features

• Input voltage range (VI): 4.75 V to 35 V

• 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

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.

UA78L09ACD属于集成电路（IC） > 线性 + 开关稳压器。美国德州仪器公司制造生产的UA78L09ACD稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。