ISL78302A_14 Datasheet, PDF (10/11 Pages) Intersil Corporation – Dual LDO with Low Noise, Very High PSRR and Low IQ

ISL78302A
entry and exit delays are 200ms and 25µs, respectively. Larger
or smaller capacitor values yield proportionately longer or shorter
delay times. The POR exit delay should never be allowed to be
less than 10µs to ensure sufficient immunity against transient
induced false POR triggering.
Overheat Detection
The bandgap provides a proportional-to-temperature current that
is indicative of the temperature of the silicon. This current is
compared with references to determine if the device is in danger
of damage due to overheating. When the die temperature
reaches about +145°C, one or both of the LDOs momentarily
shuts down until the die cools sufficiently. In the overheat
condition, only the LDO sourcing more than 50mA is shut off.
This does not affect the operation of the other LDO. If both LDOs
source more than 50mA and an overheat condition occurs, both
LDO outputs are disabled. Once the die temperature falls back
below about +110°C, the disabled LDOs are re-enabled, and
soft-start automatically takes place.
The ISL78302A provides short-circuit protection by limiting the
output current to about 475mA. If short circuited, an output
current of 475mA will cause die heating. If the short circuit lasts
long enough, the overheat detection circuit will turn off the output.
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make
sure you have the latest revision.
DATE
REVISION
CHANGE
December 23, 2013
FN7932.1
Page 10
- 2nd line of the disclaimer changed from:
"Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted"
to:
"Intersil Automotive Qualified products are manufactured, assembled and tested utilizing TS16949 quality
systems as noted"
May 21, 2012
FN7932.0 Initial Release
About Intersil
Intersil Corporation is a leader in the design and manufacture of high-performance analog, mixed-signal and power management
semiconductors. The company's products address some of the largest markets within the industrial and infrastructure, personal
computing and high-end consumer markets. For more information about Intersil, visit our website at www.intersil.com.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
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For additional products, see www.intersil.com/en/products.html
Intersil Automotive Qualified products are manufactured, assembled and tested utilizing TS16949 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
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parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
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10
FN7932.1
December 23, 2013