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TPS76333QDBVRG4Q1 Datasheet(PDF) 11 Page - Texas Instruments

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Part # TPS76333QDBVRG4Q1
Description  Low-Power, 150-mA, Low-Dropout Linear Regulators
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS76333QDBVRG4Q1 Datasheet(HTML) 11 Page - Texas Instruments

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TPS763-Q1, TPS76301-Q1, TPS76316-Q1, TPS76318-Q1
TPS76325-Q1, TPS76330-Q1, TPS76333-Q1, TPS76350-Q1
www.ti.com
SGLS247B – SEPTEMBER 2011 – REVISED MARCH 2016
Product Folder Links: TPS763-Q1 TPS76301-Q1 TPS76316-Q1 TPS76318-Q1 TPS76325-Q1 TPS76330-Q1
TPS76333-Q1 TPS76350-Q1
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Copyright © 2011–2016, Texas Instruments Incorporated
(1)
Approximate value for thermal shutdown
8.4 Device Functional Modes
8.4.1 Normal Operation
The device regulates to the nominal output voltage under the following conditions:
The input voltage is at least as high as VIN(min).
The input voltage is greater than the nominal output voltage added to the dropout voltage.
The enable voltage is greater than VEN(min).
The output current is less than the current limit.
The device junction temperature is less than the maximum specified junction temperature.
8.4.2 Dropout Operation
If the input voltage is lower than the nominal output voltage plus the specified dropout voltage, but all other
conditions are met for normal operation, the device operates in dropout mode. In this mode of operation, the
output voltage is the same as the input voltage minus the dropout voltage. The transient performance of the
device is significantly degraded because the pass device is in the linear region and no longer controls the current
through the LDO. Line or load transients in dropout can result in large output voltage deviations.
8.4.3 Disabled
The device is disabled under the following conditions:
The enable voltage is less than the enable falling threshold voltage or has not yet exceeded the enable rising
threshold.
The device junction temperature is greater than the thermal shutdown temperature.
The input voltage is less than UVLOfalling.
Table 1 shows the conditions that lead to the different modes of operation.
Table 1. Device Functional Mode Comparison
OPERATING
MODE
PARAMETER
VIN
VEN
IOUT
TJ
Normal mode
VIN > VOUT(nom) + VDO and VIN >
VIN(min)
VEN > VEN(high)
IOUT < ILIM
TJ < 125°C
Dropout mode
VIN(min) < VIN < VOUT(nom) + VDO
VEN > VEN(high)
TJ < 125°C
Disabled mode
(any true
condition
disables the
device)
VIN < UVLOfalling
VEN < VEN(low)
TJ > 165°C
(1)


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