LM140LAH-12集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LM140LAH-12属于集成电路（IC）的线性+开关稳压器。由美国德州仪器公司制造生产的LM140LAH-12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。

1FEATURES

2• Line Regulation of 0.04%/V

• Load Regulation of 0.01%/mA

• Output Voltage Tolerances of

– ±2% at Tj = 25°C and ±4% Over the

Temperature Range (LM140LA)

– ±3% Over the Temperature Range

(LM340LA)

• Output Current of 100 mA

• Internal Thermal Overload Protection

• Output Transistor Safe Area Protection

• Internal Short Circuit Current Limit

• Available in

– Metal TO Low Profile Package

(LM140LA/LM340LA)

– Plastic TO-92 (LM340LA)

DESCRIPTION

The LM140L series of three terminal positive

regulators is available with several fixed output

voltages making them useful in a wide range of

applications. The LM140LA is an improved version of

the LM78LXX series with a tighter output voltage

tolerance (specified over the full military temperature

range), higher ripple rejection, better regulation and

lower quiescent current. The LM140LA regulators

have ±2% VOUT specification, 0.04%/V line regulation,

and 0.01%/mA load regulation. When used as a

zener diode/resistor combination replacement, the

LM140LA usually results in an effective output

impedance improvement of two orders of magnitude,

and lower quiescent current. These regulators can

provide local on card regulation, eliminating the

distribution problems associated with single point

regulation. The voltages available allow the LM140LA

to be used in logic systems, instrumentation, Hi-Fi,

and other solid state electronic equipment. Although

designed primarily as fixed voltage regulators, these

devices can be used with external components to

obtain adjustable voltages and currents.

The LM140LA/LM340LA are available in the low

profile metal three lead TO (NDT) and the LM340LA

are also available in the plastic TO-92 (LP). With

adequate heat sinking the regulator can deliver 100

mA output current. Current limiting is included to limit

the peak output current to a safe value. Safe area

protection for the output transistor is provided to limit

internal power dissipation. If internal power dissipation becomes too high for the heat sinking

provided, the thermal shut-down circuit takes over,

preventing the IC from overheating.

For applications requiring other voltages, see LM117L

Data Sheet.