Gate

Driver

Control

Logic

Low Side

N-MOS

High Side

N-MOS

Thermal

Shutdown

Softstart

Under

Voltage

Shutdown

direct control

&

compensation

VIN

SW

GND

PG

EN

VOS

REF

Active

Output

Discharge

Power

Good

FB

ramp

minimum

on-timer

DCS-CONTROL

TM

error

amplifier

comparator

50

Copyright © 2016, Texas Instruments Incorporated

9

TLV62080, TLV62084, TLV62084A

www.ti.com

SLVSAK9H – OCTOBER 2011 – REVISED JANUARY 2017

Product Folder Links: TLV62080 TLV62084 TLV62084A

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Copyright © 2011–2017, Texas Instruments Incorporated

8 Detailed Description

8.1 Overview

The TLV62080 and TLV62084x synchronous switched-mode converters are based on DCS-Control™. DCS-

Control™ 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 mode, the TLV6208x converter operates with

the nominal switching frequency of 2 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 quiescent current to achieve high efficiency over the entire load current range. DCS-Control™

supports both operation modes (PWM and PFM) using a single building block with a seamless transition from

PWM to power save mode without effects on the output voltage. The TLV62080 and TLV62084x devices offer

both excellent DC voltage and superior load transient regulation, combined with very low output voltage ripple,

minimizing interference with RF circuits.

8.2 Functional Block Diagram

space

space

8.3 Feature Description

8.3.1 100% Duty-Cycle Low-Dropout Operation

The devices offer low input-to-output voltage difference by entering the 100% duty-cycle mode. In this mode the

high-side MOSFET switch is constantly turned on and the low-side MOSFET is switched off. This mode is

particularly useful in battery powered applications to achieve the longest operation time by taking full advantage

of the whole battery voltage range. Equation 1 calculates the minimum input voltage to maintain regulation based

on the load current and output voltage.