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TPS79228DBVR Fiches technique(PDF) 10 Page - Texas Instruments

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No de pièce TPS79228DBVR
Description  ULTRALOW-NOISE, HIGH PSRR, FAST RF 100-mA LOW-DROPOUT LINEAR REGULATORS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS79228DBVR Fiches technique(HTML) 10 Page - Texas Instruments

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TPS79201, TPS79225
TPS79228, TPS79230
SLVS337B – MARCH 2001 – REVISED MAY 2002
www.ti.com
10
OUTPUT VOLTAGE
PROGRAMMING GUIDE
VO
VI
OUT
FB
R1
R2
GND
EN
IN
≤ 0.7 V
≥ 2 V
TPS79201
1
µF
BYPASS
0.01
µF
1
µF
C1
22 pF
15 pF
15 pF
OUTPUT
VOLTAGE
R1
R2
2.5 V
3.3 V
3.6 V
C1
33.4 k
53.6 k
59 k
30.1 k
30.1 k
30.1 k
Figure 23. TPS79201 Adjustable LDO Regulator Programming
REGULATOR PROTECTION
The TPS792xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input voltage drops
below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally
limited. If extended reverse voltage operation is anticipated, external limiting might be appropriate.
The TPS792xx features internal current limiting and thermal protection. During normal operation, the TPS792xx limits
output current to approximately 400 mA. When current limiting engages, the output voltage scales back linearly until the
overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to
exceed the power dissipation ratings of the package or the absolute maximum voltage ratings of the device. If the
temperature of the device exceeds approximately 165
°C, thermal-protection circuitry shuts it down. Once the device has
cooled down to below approximately 140
°C, regulator operation resumes.


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