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TLV751 Fiches technique(PDF) 20 Page - Texas Instruments

No de pièce TLV751
Description  TLV751 Dual, 500-mA, High-Accuracy, LDO in a Small-Size Package
Download  31 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
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TLV751 Fiches technique(HTML) 20 Page - Texas Instruments

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TLV751
SBVS385B – DECEMBER 2019 – REVISED APRIL 2020
www.ti.com
Product Folder Links: TLV751
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
8.2 Typical Application
Figure 42 shows the typical application circuit for the TLV751. Input and output capacitances must be at least
1 µF.
Figure 42. TLV751 Typical Application
8.2.1 Design Requirements
Use the parameters listed in Table 2 for typical linear regulator applications.
Table 2. Design Parameters
PARAMETER
DESIGN REQUIREMENT
Input voltage
3.8 V
Output voltage
3.3 V, ±1%
Input current
500 mA (maximum)
Output load
500-mA dc
Maximum ambient temperature
70°C
8.2.2 Detailed Design Procedure
Input and output capacitors are required to achieve the output voltage transient requirements. Capacitance
values of 2.2 µF are selected to give the maximum output capacitance in a small, low-cost package; see the
Input and Output Capacitor Selection section for details.
Figure 38 illustrates the output voltage of the TLV751; set the output voltage using the resistor divider.
8.2.2.1 Input Current
During normal operation, the input current to the LDO is approximately equal to the output current of the LDO.
During startup, the input current is higher as a result of the inrush current charging the output capacitor. Use
Equation 6 to calculate the current through the input.
where:
VOUT(t) is the instantaneous output voltage of the turn-on ramp
dVOUT(t) / dt is the slope of the VOUT ramp
RLOAD is the resistive load impedance
(6)


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