RT2613AGQW
Evaluation Board
your power partner.
2.95V to 6V Input, 3A Output, 2MHz, Synchronous
Step-Down Converter
Purpose
The RT2613A is a synchronous step-down converter with the input voltage range from 2.95V to 6V and provides 3A
output current. This document explains the function and use of the RT2613A evaluation board (EVB), and provides
information to enable operation, modification of the evaluation board and circuit to suit individual requirements.
Table of Contents
Purpose ................................................................................................................................................................. 1
Introduction............................................................................................................................................................ 2
Key Performance Summary Table .......................................................................................................................... 2
Bench Test Setup Conditions ................................................................................................................................. 3
Schematic, Bill of Materials & Board Layout ........................................................................................................... 5
More Information.................................................................................................................................................... 7
Important Notice for Richtek Evaluation Board ....................................................................................................... 7
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RT2613AGQW
Evaluation Board
your power partner.
Introduction
General Product Information
The RT2613A is a high efficiency step-down converter and capable of delivering 3A output current over a wide input
voltage range from 2.95V to 6V. The RT2613A provides accurate regulation for a variety of loads with ±3% accuracy.
For reducing inductor size, it provides up to 2MHz switching frequency. The efficiency is maximized through the
integrated 45mΩ MOSFETs and 550μA typical supply current. Under voltage lockout voltage of the RT2613A is
2.7V, and it also provides external setting by a resistor network on the enable pin. The RT2613A provides
protections such as inductor current limit under voltage lockout and thermal shutdown. The over temperature
threshold is 145°C. The RT2613A is available in WQFN-16L 3x3 package.
Product Feature
Integrated 45mΩ MOSFETs
Input Range : 2.95V to 6V
Adjustable PWM Frequency : 700kHz to 2MHz
Output Current : 3A
95% Efficiency
Adjustable Soft-Start
Power Good Indicator
Enable Control
Under Voltage Lockout
Current Limit
Thermal Shutdown
Key Performance Summary Table
Key Features
Evaluation Board Number : PCB038_V1
Input Voltage Range
2.95V to 6V
Max Output Current
3A
Default Output Voltage
1.8V
Default Marking & Package Type
RT2613AGQW, WQFN-16L 3x3
Operation Frequency
Adjustable from 700kHz to 2MHz
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Bench Test Setup Conditions
Headers Description and Placement
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)
VIN
Input voltage
Power input.
EN
Enable test point
Externally pulled high to enable and pulled low to disable this
chip. It is internally pulled up to high when the pin is floating.
GND
Ground
The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
AGND
Analog ground
Analog ground.
COMP
Compensation node test point
Compensation node for converter stability.
FB
Feedback voltage input
Feedback input.
PGOOD
Power good test point
Output of power good indicator.
BOOT
Bootstrap supply test point
Bootstrap supply for high-side gate driver. Connect a capacitor
between the BOOT and LX pins.
LX
Switch node test point
Connect this pin to an external L-C filter.
RT/SYNC
Clock input
Frequency Setting and External Synchronous.
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Power-up & Measurement Procedure
1. Apply a 12V nominal input power supply (2.95V < VIN < 6V) to the VIN and GND terminals.
2. Set the jumper at JP1 to connect terminals 1 and 2, connecting EN to enable operation.
3. Verify the output voltage (approximately 1.8V) between VOUT and GND.
4. Connect an external load up to 3A 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 :
VOUT = 0.827 x (1 +
R1
)
R2
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RT2613AGQW
Evaluation Board
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Schematic, Bill of Materials & Board Layout
EVB Schematic Diagram
Bill of Materials
Reference
Qty
Part Number
Description
Package
Manufacture
U1
1
RT2613AGQW
DC/DC Converter
WQFN-16L 3x3
RICHTEK
C1
1
C2012X5R1C106KT
10µF/16V/X5R
C-0805
TDK
C3
1
C1608X5R1E105KT000E
1µF/25V/X5R
C-0603
TDK
C5, C6
2
GRM32ER61C226KE20L
22µF/16V/X7R
C-1210
MURATA
C8
1
C1608X7R1H104KT000N
0.1µF/50V/X7R
C-0603
TDK
C10
1
0603B103K500
10nF/50V/X7R
C-0603
WALSIN
C11
1
0603B332K500
3.3nF/50V/X7R
R-0603
WALSIN
L1
1
NR8040T1R4N
1.4µH/7A
8 x 8 x 4 mm
Taiyo Yuden
R1
1
11.8k
R-0603
R2
1
10k
R-0603
R3
1
7.68k
R-0603
R4
1
180k
R-0603
R5
1
100k
R-0603
C2, C4, C7, C9, C12,
C13, R6, R7, R8
9
NC
CP1
1
0
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Evaluation Board
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PCB Layout
Top View (1st layer)
Bottom View (4th Layer)
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RT2613AGQW
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More Information
For more information, please find the related datasheet or application notes from Richtek website
http://www.richtek.com.
Important Notice for Richtek Evaluation Board
THIS DOCUMENT IS FOR REFERENCE ONLY, NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK’S WARRANTY, EXPRESS
OR IMPLIED, UNDER CONTRACT, TORT OR STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE T O
BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL
DAMAGES.
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