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package, and constructed with as little coupling to the

ground plane as possible.

Capacitance at the output node will reduce stability,

eventually resulting in peaking, and finally oscillation if the

capacitance is large enough. The design of the EL2070

allows a larger capacitive load than comparable products,

yet there are occasions when a series resistor before the

capacitance may be needed. Please refer to the graphs to

determine the proper resistor value needed.

Disable/Enable Operation

The EL2070 has a disable/enable control input at pin 8. The

device is enabled and operates normally when pin 8 is left

open or tied to pin 7. When more than 350µA is pulled from

pin 8, the EL2070 is disabled. The output becomes a high

impedance, the inverting input is no longer driven to the

positive input voltage, and the supply current is reduced by

2/3. To make it easy to use this feature, there is an internal

resistor to limit the current to a safe level (0.8mA) if pin 8 is

grounded.

To draw current out of pin 8 an open-collector TTL output, a

5V CMOS output, or an NPN transistor can be used.

EL2070