SW

MOSFET Driver

Anti Shoot Through

Converter Control

Logic

High Side

Current

Sense

Vref

0.8V

Comparator

Error Amplifier

PVIN

PGND

EN

DEF

EN

M1

M2

VOS

SW

FB

Direct Control

and

Compensation

ramp

Timer

ton

PGND

DCS - Control™

Charge Pump

for

Gate driver

CP

CN

SS

Iss

Voltage clamp

Vref

÷1.56

PVIN

Hiccup

current limit

#32 counter

Output voltage

discharge

logic

200Ω

M3

VREF

PG

VFB

Bandgap

Undervoltage

Lockout

Thermal shutdown

Vin

400 kΩ

AVIN

AGND

TPS62095

www.ti.com

SLVSBD8A – APRIL 2014 – REVISED MAY 2014

7 Detailed Description

7.1 Overview

The TPS62095 synchronous step down converter is based on DCS-Control™ (Direct Control with Seamless

transition into Power Save Mode). This is an advanced regulation topology that combines the advantages of

hysteretic and voltage mode control.

The DCS-Control™ topology operates in PWM (Pulse Width Modulation) mode for medium to heavy load

conditions and in Power Save Mode at light load currents. In PWM, the converter operates with its nominal

switching frequency of 1.4 MHz having a controlled frequency variation over the input voltage range. As the load

current decreases, the converter enters Power Save Mode, reducing the switching frequency and minimizing the

IC's quiescent current to achieve high efficiency over the entire load current range. DCS-Control™ supports both

operation modes using a single building block and therefore has a seamless transition from PWM to Power Save

Mode without effects on the output voltage. The TPS62095 offers excellent DC voltage regulation and load

transient regulation, combined with low output voltage ripple, minimizing interference with RF circuits.

7.2 Functional Block Diagram

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