LP5990

SNVS438B – APRIL 2007 – REVISED DECEMBER 2007

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ENABLE CONTROL

The LP5990 may be switched ON or OFF by a logic input at the ENABLE pin, VEN . A high voltage at this pin will

turn the device on. When the enable pin is low, the regulator output is off and the device typically consumes 3

nA. If the application does not require the shutdown feature, the VEN pin should be tied to VIN to keep the

regulator output permanently on.

The signal source used to drive the VEN input must be able to swing above and below the specified turn-on/off

voltage thresholds listed in the Electrical Characteristics section under VIL and VIH.

DSBGA MOUNTING

The DSBGA package requires specific mounting techniques, which are detailed in TI Application Note AN-1112

(SNVA009).

For best results during assembly, alignment ordinals on the PC board may be used to facilitate placement of the

DSBGA device.

DSBGA LIGHT SENSITIVITY

Exposing the DSBGA device to direct light may cause incorrect operation of the device. Light sources such as

halogen lamps can affect electrical performance if they are situated in proximity to the device.

Light with wavelengths in the red and infra-red part of the spectrum have the most detrimental effect thus the

fluorescent lighting used inside most buildings has very little effect on performance.

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