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1A, 1.5MHz, 6V CMCOT Synchronous Step-Down Converter

EVB_RT8096AHGJ6

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The RT8096A is a high efficiency synchronous step-down DC/DC converter. Its input voltage range is from 2.5V to 6V and provides an adjustable regulated output voltage from 0.6V to 3.4V while delivering up to 1A of output current. The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. The Current Mode Constant-On-time (CMCOT) operation with internal compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The RT8096A is available in the TSOT-23-6 package.

Purpose

The RT8096A is a high efficiency synchronous step-down DC/DC converter. Its input voltage range is from 2.5V to 6V and provides an adjustable regulated output voltage from 0.6V to 3.4V while delivering up to 1A of output current. This document explains the function and use of the RT8096A evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements.


Introduction

General Product Information

The RT8096A is a high efficiency synchronous step-down DC/DC converter. Its input voltage range is from 2.5V to 6V and provides an adjustable regulated output voltage from 0.6V to 3.4V while delivering up to 1A of output current. The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. The Current Mode Constant-On-time (CMCOT) operation with internal compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The RT8096A is available in the TSOT-23-6 package.


Product Feature

  • Efficiency Up to 95%
  • RDSON 160mΩ HS/110mΩ LS
  • VIN Range 2.5V to 6V
  • VREF 0.6V with ±2% Accuracy
  • CMCOT™ Control Loop Design for Best Transient Response, Robust Loop Stability with Low-ESR (MLCC) COUT
  • Fixed Soft-Start 1.2ms; PGOOD Function in TSOT-23-6
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout
  • Output Under Voltage Protection (UVP Hiccup)
  • Thermal Shutdown Protection
  • Power Saving at Light Load

 

Key Performance Summary Table

Key Features

Evaluation Board Number : PCB070_V1

Default Input Voltage

3.3V

Max Output Current

1A

Default Output Voltage

1.2V

Default Marking & Package Type

RT8096AHGJ6, TSOT-23-6

Operation Frequency

Steady 1.5MHz at all loads



Bench Test Setup Conditions

Headers Description and Placement

Technical Document Image Preview

Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to evb_service@richtek.com.



Test Points

The EVB is provided with the test points and pin names listed in the table below.

Test point/

Pin name

Signal

Comment (expected waveforms or voltage levels on test points)

FB

Feedback Voltage Input

Feedback Voltage Input. An external resistor divider from the output to GND, tapped to the FB pin, sets the output voltage.

VIN

Input voltage

Supply Voltage Input. The RT8096A operates from a 2.5V to 6V input.

GND

Ground

Power Ground.

PG

Power Good Indicator

Power Good Indicator. The output of this pin is an open-drain with external pull-up resistor to IN. PG is pulled up to IN when the FB voltage is within 90%, otherwise it is LOW.

LX

Switch node

Switch node.

EN

Enable Control Input

Enable Control Input.



Power-up & Measurement Procedure

1. Apply a 3.3V nominal input power supply (2.5V < VIN < 6V) to the VIN and GND terminals.

2. Set the jumper at JP1 to connect terminals 2 and 3, connecting EN to VIN.

3. Verify the output voltage (approximately 1.2V) between VOUT and GND.

4. Connect an external load up to 1A to the VOUT and GND terminals and verify the output voltage and current.


Output Voltage Setting

Set the output voltage with the resistive divider (R1, R2) between VOUT and GND with the midpoint connected to FB. The output is set by the following formula :

Technical Document Image Preview



Schematic, Bill of Materials & Board Layout

EVB Schematic Diagram

Technical Document Image Preview



Bill of Materials

Reference

Qty

Part Number

Description

Package

Manufacturer

U1

1

RT8096AHGJ6

DC/DC Converter

TSOT-23-6

RICHTEK

C1

1

NC

C-0603

C2, C3

2

C3216X5R1H106KT000N

10µF/50V/X5R/1206

C-1206

TDK

C4, C5

2

NA

C-1210

L1

1

NR8040T1R4N

1.4µH

L-NR8040_2

TAIYO YUDEN

R1, R2, R3

3

0603 100K 1%

100k

R-0603

WALSIN

R4

1

NC

R-0603



PCB Layout

Technical Document Image Preview

Top View

Technical Document Image Preview

Bottom View

Title Last Update Share Download
Evaluation Board User Guide 2016/06/03
Bill of Materials 2016/06/03
Gerber File 2016/06/03
Schematic 2016/06/03
Part NumberFree SampleBuy From Authorized Distributor
EVB_RT8096AHGJ6 Not available Buy from Distributor
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