LM140JAN

Features:

Complete specifications at 0.5A and 1.0A loads
No external components
Internal thermal overload protection
Internal short circuit current-limiting
Output transistor safe-area compensation


Specifications

DC Input Voltage .................................................. 35V
Internal Power Dissipation (Note 2) ..................... Internally Limited
Maximum Junction Temperature (T_Jmax) .............. 150°C
Storage Temperature Range ............................... -65°C T_A +150°C
Operating Temperature Range ............................ -55°C T_A +125°C
Lead Temperature (Soldering 10 seconds) ......... 300°C
Thermal Resistance
  _JA
    T0−5 (Still Air) ................................................ 232°C/W
    T0−5 (500 LF/Min Air Flow) ............................ 77°C/W
    T0−3 (Still Air) ................................................ 35°C/W
    T0−3 (500 LF/Min Air Flow) ........................... TBD
  _JC
    T0−5 ............................................................ 15°C/W
    T0−3 ........................................................... 4°C/W
ESD Susceptibility (Note 3) ............................. 2KV


Description

The monolithic 3-terminal positive voltage regulators LM140JAN employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 0.5A and 1.0A output current. The LM140JAN are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.