VIN

EN

VSEL

SW

VOS

L 2.2 PH

4.7 PF

2.0V to 5.5V

Low Power

MCU & RF

TPS62748

CTRL

LOAD

10 PF

GND

Sensor

TPS62748

www.ti.com

SLVSD37A – SEPTEMBER 2015 – REVISED OCTOBER 2015

10 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.

10.1 Application Information

The TPS62748 is a high efficiency step down converter with ultra low quiescent current of typically 360 nA. The

device operates with a tiny 2.2-µH inductor and 10-µF output capacitor over the entire recommended operation

range. A dedicated measurement set-up is required for the light load efficiency measurement and device

quiescent current due to the operation in the sub microampere range. In this range any leakage current in the

measurement set-up will impact the measurement results.

10.2 Typical Application

Figure 6. TPS62748 Typical Application Circuit

10.2.1 Design Requirements

The TPS62748 is a highly integrated DC/DC converter. The output voltage is set via a VSEL pin interface. The

design guideline provides a component selection to operate the device within the recommended operating

conditions.

Table 2 shows the list of components for the Application Characteristic Curves

Table 2. Components for Application Characteristic Curves

Reference

Description

Value

Manufacturer

TPS62748

360nA Iq step down converter

Texas Instruments

CIN

Ceramic capacitor, GRM155R61C475ME15

4.7 µF

Murata

COUT

Ceramic capacitor, GRM155R60J106ME11

10 µF

Murata

L

Inductor DFE201610C

2.2 µH

Toko

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