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TPS7A7002DDAR Datasheet(PDF) 6 Page - Texas Instruments

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No. de pieza TPS7A7002DDAR
Descripción Electrónicos  Very Low Input, Very Low Dropout 3-A Regulator With Enable
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS7A7002DDAR Datasheet(HTML) 6 Page - Texas Instruments

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V
= 0.5 x (
)
OUT
1 +
R
1
R
2
Thermal
Protection
OUT
V
OUT
IN
EN
Hysteresis
Current
Limit
UVLO
GND
Charge
Pump
0.5V Reference
R
1
R
2
FB
TPS7A7002
SBVS209C – MAY 2013 – REVISED JANUARY 2016
www.ti.com
7 Detailed Description
7.1 Overview
The TPS7A7002 offers a high current supply with very-low dropout voltage. The TPS7A7002 is designed to
minimize the required component count for a simple, small-size, and low-cost solution.
7.2 Functional Block Diagram
Figure 7. Adjustable Output Voltage Version
7.3 Feature Description
7.3.1 Internal Current Limit
The TPS7A7002 internal current limit helps protect the regulator during fault conditions. During a current limit
condition, the output sources a fixed amount of current largely independent of output voltage. For reliable
operation, do not operate the device in a current limit state for an extended period of time.
Powering on the device with the enable pin, or increasing the input voltage above the minimum operating voltage
while a low-impedance short exists on the output of the device, may result in a sequence of high-current pulses
from the input to the output of the device. The energy consumed by the device is minimal during these events;
therefore, there is no failure risk. Additional input capacitance helps to mitigate the load transient requirement of
the upstream supply during these events.
7.3.2 Enable (EN)
The enable pin (EN) is an active-high logic input. When it is logic low, the device turns off, and the consumption
current is less than 1 µA. When it is logic high, the device turns on. The EN pin must be connected to a logic
high or logic low level.
When the enable function is not required, connect EN to IN.
6
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Product Folder Links: TPS7A7002


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