7.2 Typical Application

Figure 7-5 shows the typical application circuit for the TLV758P. Input and output capacitances must be at least

1 µF.

IN

OUT

GND

EN

DNC

TLV758P

V

OUT

V

IN

FB

C

IN

C

OUT

V

EN

R

2

R

1

Figure 7-5. TLV758P Typical Application

7.2.1 Design Requirements

Use the parameters listed in Table 7-1 for typical linear regulator applications.

Table 7-1. 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

7.2.2 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 7-1 illustrates the output voltage of the TLV758P; set the output voltage using the resistor divider.

7.2.2.1 Input Current

During normal operation, the input current to the LDO is approximately equal to the output current of the LDO.

During start-up, 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.

I

=

OUT(t)

C

OUT

OUT

´ dV

(t)

dt

V

OUT(t)

R

LOAD

+

(6)

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

www.ti.com

TLV758P

SBVS351D – APRIL 2018 – REVISED OCTOBER 2023

Copyright © 2023 Texas Instruments Incorporated

Submit Document Feedback

21

Product Folder Links: TLV758P