LP2953_15 Datasheet, PDF (15/41 Pages) Texas Instruments – LP295x Adjustable Micropower Low-Dropout Voltage Regulators

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Functional Block Diagrams (continued)
LP2952-N, LP2952A, LP2953, LP2953A
SNVS095F – MAY 2004 – REVISED MARCH 2015
Figure 29. LP2953 Block Diagram
7.3 Feature Description
7.3.1 Fixed Voltage Options and Programmable Voltage Version
The LP2952 and LP2953 provide 2 fixed output options: 3.3 V and 5 V. To meet different requirements for the
application, they can also be used as programmable voltage regulators with external resistor networks; see
Application Information for more details.
7.3.2 High-Accuracy Output Voltage
With special and careful design to minimize all contributions to the output voltage error, the LP2952 and LP2953
distinguished themselves as very high output voltage accuracy micropower LDO. This includes a tight initial
tolerance (0.5% typical), extremely good load and line regulation, and a very low output voltage temperature
coefficient, making the part an ideal a low-power voltage reference.
7.3.3 Error Detection Comparator Output
The LP2952 and LP2953 will generate a logic low output when the output falls out of regulation by more than
approximately 5%. See Application Information for more details.
7.3.4 Auxiliary Comparator
An auxiliary comparator is designed for customer special purpose when shutdown is activated. This block is still
active and can be used to generate fault detection, low input line detection signal for system controllers. The
comparator output level is CMOS- or TTL-compatible. See Application Information for more details.
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Product Folder Links: LP2952-N LP2952A LP2953 LP2953A