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TPS7A3401 Datasheet(PDF) 10 Page - Texas Instruments

Part # TPS7A3401
Description  TPS7A3401 ??0-V, ??00-mA, Low-Noise Negative Voltage Regulator
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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TPS7A3401 Datasheet(HTML) 10 Page - Texas Instruments

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Error
Amp
Enable
Anti-
saturation
Thermal
Shutdown
Current
Limit
Bandgap
FB
OUT
GND
IN
EN
Pass
Device
TPS7A3401
SBVS163A – JUNE 2011 – REVISED MAY 2015
www.ti.com
7 Detailed Description
7.1 Overview
The TPS7A3401 device is a wide VIN, low-noise, 150-mA linear regulator (LDO). This device features an enable
pin, programmable soft-start, current limiting, and thermal protection circuitry that allow the device to be used in a
wide variety of applications. As a bipolar-based device, the TPS7A3401 device is ideal for high-accuracy, high-
precision applications at higher voltages.
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 Internal Current Limit
The fixed internal current limit of the TPS7A3401 device helps protect the regulator during fault conditions. The
maximum amount of current the device can source is the current limit (330 mA, typical), and it is largely
independent of output voltage. For reliable operation, do not operate the device in current limit for extended
periods of time.
7.3.2 Enable Pin Operation
The TPS7A3401 device provides a dual polarity enable pin (EN) that turns on the regulator when |VEN| > 2 V,
whether the voltage is positive or negative, as shown in Figure 18.
This functionality allows for different system power management topologies:
Connecting the EN pin directly to a negative voltage, such as VIN, or
Connecting the EN pin directly to a positive voltage, such as the output of digital logic circuitry.
10
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