AIC1740
n BLOCK DIAGRAM
VIN
VOUT
CURRENT
LIMITING
ERROR
AMP
THERMAL
SHUTDOWN
+
-
+
-
1.235V
Reference
GND
n PIN DESCRIPTION
VOUT PIN - Output pin.
GND PIN - Power GND.
VIN PIN - Power Supply Input.
APPLICATION INFORMATIONS
A 4.7mF (or greater) capacitor is required between
the AIC1740 output and ground for stability.
Without this capacitor the part will oscillate. Even
though most types of capacitor may work, the
equivalent series resistance (ESR) should be held
to 5W or less if Aluminum electrolytic type is used.
Many Aluminum electrolytics have electrolytes that
freeze at about -30°C, so solid tantalums are
n
recommended for operation below -25°C. The
value of this capacitor may be increased without
limit.
A 0.1mF capacitor (or greater) should be placed
from the AIC1740 input to ground if the lead
inductance between the input and power source
exceeds 500nH (approximately 10 inches of trace).
5
AIC [ ANALOG INTERGRATIONS CORPORATION ]
