V

IN

Enable

V

OUT

GND

REG710

C

IN

2.2mF

C

OUT

2.2mF

C

PUMP

0.22mF

4

6

3

5

1

2

REG71050, REG71055, REG710

SBAS221H – DECEMBER 2001 – REVISED OCTOBER 2015

www.ti.com

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The REG710 is a switched capacitor voltage converter that produces a regulated, low-ripple output voltage from

an unregulated input voltage range from 1.8 V to 5.5 V. The high switching frequency allows the use of small

surface-mount capacitors. The following section gives guidance to choose external components to complete the

power supply design. Application curves are included for the typical application shown below.

9.2 Typical Applications

Figure 7. Typical Operating Circuit

9.2.1 Design Requirements

The REG710 family of switched capacitor voltage converters offers a variety of regulated fixed output voltages.

This family supports unregulated input voltages which can have values that are lower or higher than the

regulated output voltage. Only input and output capacitors as well as a pump capacitor are required to have a

range of REG710.

9.2.2 Detailed Design Procedure

9.2.2.1 Capacitor Selection

capacitors generally have a higher effective series resistance (ESR) and may contribute to higher output voltage

ripple. Leaded capacitors also increase ripple due to the higher inductance of the package itself. To achieve best

respectively) should also be surface-mount ceramic types. In all cases, X7R or X5R dielectric are recommended.

See the typical operating circuit shown in Figure 7 for component values.

With light loads or higher input voltage, a smaller 0.1-

The capacitors listed in Table 2 can be used with the REG710. This table is only a representative list of

compatible parts.

10

Submit Documentation Feedback

Copyright © 2001–2015, Texas Instruments Incorporated

Product Folder Links: REG71050 REG71055 REG710