CS8122YT5G

CS8122YT5G                       Description

The CS8122 is a precision 5.0 V linear regulator capable of sourcing in   excess   of   750   mA.   The   RESET ’ s   delay   time   is   externally programmed using a discrete RC network. During power up, or when the output goes out of regulation, the RESET lead remains in the low state for the duration of the delay. This function is independent of the input voltage and will function correctly as long as the output voltage remains at or above 1.0 V. Hysteresis is included in the Delay and the RESET comparators to improve noise immunity. A latching discharge circuit is used to discharge the delay capacitor when it is triggered by a brief fault condition.The  regulator  is  protected  against  a  variety  of  fault  conditions:  i.e.reverse  battery,  over voltage,  short  circuit  and  thermal  runaway conditions. The regulator is protected against voltage transients ranging from ? 50 V to +40 V. Short circuit current is limited to 1.2 A (typ).The  CS8122  is  an  improved  replacement  for  the  CS8126  and features a tighter tolerance on its output voltage (2.0% vs. 4.0%).The CS8122 is packaged in a 5 lead TO ? 220 with copper tab. The copper tab can be connected to a heat sink if necessary.

CS8122YT5G                       Features

? 5.0 V ± 2.0% Regulated Output

? Low Dropout Voltage (0.6 V @ 0.5 A)

? 750 mA Output Current Capability

? Externally Programmed RESET Delay

? Fault Protection ? Reverse Battery ? 60 V Load Dump ?? 50 V Reverse Transient ? Short Circuit ? Thermal Shutdown

? Pb ? Free Packages are Available*

 CS8122YT5G                       Applications

The LP2985 has a host of features that makes the regulator an ideal candidate for a variety of portable applications:

? Low dropout: A PNP pass element allows a typical dropout of 280 mV at 150-mA load current and 7 mV at

1-mA load.

? Low quiescent current: The use of a vertical PNP process allows for quiescent currents that are considerably

lower than those associated with traditional lateral PNP regulators.

? Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01 μA when the

ON/OFF pin is pulled low.

? Low-ESR-capacitor friendly: The regulator is stable with low-ESR capacitors, allowing the use of small,

inexpensive, ceramic capacitors in cost-sensitive applications.

? Low noise: A BYPASS pin allows for low-noise operation, with a typical output noise of 30 μVRMS, with the

use of a 10-nF bypass capacitor.

? Small packaging: For the most space-constrained needs, the regulator is available in the SOT-23 package.