_

+

+

-

VBG

GND

FB

SW

CP

VIN

EN

Current

Sensor

Gate

Control

Modulator

Oscillator

Device

Control

PG

Thermal

Shutdown

_

+

VREF

Bias

Regulator

VAUX

CAP

VOUT

gm

gm

22k

2.45k

100k

Copyright © 2017, Texas Instruments Incorporated

HSD

LSD

RECT

UVLO

Soft-Start

/EN

100

8

TPS63710

SLVSD44 – SEPTEMBER 2017

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Product Folder Links: TPS63710

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Copyright © 2017, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TPS63710 is a dc-dc converter that generates a negative output voltage using an inverting buck topology. It

operates with an input voltage range of 3.1 V to 14 V and generates a negative output voltage down to -5.5 V. As

it is based on a step-down topology, the input voltage in absolute value needs to be larger than the negative

voltage that is generated. The output is controlled by a fixed-frequency, pulse-width-modulated (PWM) regulator.

As there is an inductor in the output path, similar to a step-down converter, the output current is continuous and

the output voltage ripple is low. This makes this topology a perfect solution for noise sensitive applications.

7.2 Functional Block Diagram

Figure 8. Block Diagram