Texas Instruments 3A Fast Response Ultra Low Dropout Linear Regulator LP38513S-1.8EV LP38513S-1.8EV Scheda Tecnica
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LP38513S-1.8EV
User's Guide
SNVA182A – August 2007 – Revised April 2013
AN-1518 LP38513S-1.8 Evaluation Board
1
Introduction
This board is designed to enable the evaluation of the LP38513S-1.8 Voltage Regulator. Each board is
assembled and tested in the factory. This evaluation board has the TO-263 5–lead package mounted.
assembled and tested in the factory. This evaluation board has the TO-263 5–lead package mounted.
2
General Description
The LP38513 is a linear regulator capable of supplying up to 3A of output current, and incorporates
Enable and Error flag features.
Enable and Error flag features.
The device has been designed to work with 10 µF ceramic input and output capacitors. Footprints areas
for C
for C
IN
and C
OUT
will allow for a variety of sizes.
3
Operation
The input voltage, applied between V
IN
and GND, should be at least 2.25V, and no higher than 5.5V.
Loads can be connected to V
OUT
with reference to GND.
Test points are provided on the board to allow monitoring of V
OUT
, V
IN
, Enable, and ERROR signals during
operation
If the application does not require the Enable function, the EN pin should be connected to directly to the
adjacent V
adjacent V
IN
pin.
4
Enable Operation
The Enable On/Off threshold is typically 850 mV, and has no hysteresis. The voltage signal must rise and
fall cleanly, and promptly, through this threshold.
fall cleanly, and promptly, through this threshold.
The Enable pin (EN) has no internal pull-up or pull-down to establish a default condition and, as a result,
this pin must be terminated either actively or passively.
this pin must be terminated either actively or passively.
Figure 1. V
OUT
vs. V
EN
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1
SNVA182A – August 2007 – Revised April 2013
AN-1518 LP38513S-1.8 Evaluation Board
Copyright © 2007–2013, Texas Instruments Incorporated