7 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, as well as validating and testing their design

implementation to confirm system functionality.

7.1 Application Information

The TPSM81033 is a synchronous boost converter designed to operate from an input voltage supply range up

to 5.5V with a 2A (typical) valley switch current limit. The TPSM81033 typically operates at a quasi-constant

2.4MHz frequency PWM at moderate-to-heavy load currents. At light load currents, the TPSM81033 converter

operates in power-save mode with PFM to achieve high efficiency over the entire load current range.

7.2 Typical Application

The TPSM81033 provides a power supply solution for portable devices powered by batteries. The TPSM81033

can output 5V and 1A from a single-cell Li-ion battery.

PVIN

EN

VOUT

FB

GND

OFF

ON

C1

C2

MODE

PFM

PWM

PG

R3

TPSM81033

SW

AVIN

2pcs 22 F(0603)

22 F(0603)

5V/1A

3V ~ 4.5V

Figure 7-1. Li-ion Battery to 5V Boost Converter

7.2.1 Design Requirements

The design parameters are listed in Table 7-1.

Table 7-1. Design Parameters

PARAMETERS

VALUES

Input voltage

3.0V to 4.5V

Output voltage

5.0V

Output current

1.0A

TPSM81033

SLVSHL0D – JUNE 2024 – REVISED DECEMBER 2024

www.ti.com

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