LP38503-ADJ_15 Datasheet, PDF (15/27 Pages) Texas Instruments – LP3850x-ADJ, LP3850xA-ADJ 3-A FlexCap Low Dropout Linear Regulator for 2.7-V to 5.5-V Inputs

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8 Application and Implementation
LP38501-ADJ, LP38503-ADJ
SNVS522I – AUGUST 2007 – REVISED AUGUST 2015
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LP38501-ADJ and LP38503-ADJ devices can provide 3-A output current with 2.7-V to 5.5-V input voltage.
These ultra-low-dropout linear regulators respond very quickly to step changes in load, making them suitable for
low-voltage microprocessor applications. Input and output capacitors of at least 10 µF are required.
8.2 Typical Applications
*Minimum capacitance required (see Detailed Design Procedure).
Figure 23. Typical Circuit (LP38501)
*Minimum capacitance required (see Detailed Design Procedure).
Figure 24. Typical Circuit (LP38503)
8.2.1 Design Requirements
For LP3850x-ADJ typical applications, use the parameters listed in Table 1 as the input parameters.
DESIGN PARAMETERS
Input voltage
Output voltage
Output current
Input capacitor
Output capacitor
Table 1. Design Parameters
VALUE
2.7 V to 5.5 V
0.6 V to 5 V (adjustable)
3 A (maximum)
10 µF (minimum)
10 µF (minimum)
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