RT6212AHGJ6F
Evaluation Board
your power partner.
2A, 18V, 500kHz, ACOT™ Step-Down Converter
Purpose
The RT6212A is a synchronous step-down converter with the input voltage range from 4.5V to 18V and provides 2A
output current. This document explains the function and use of the RT6212A 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.................................................................................................................................................... 8
Important Notice for Richtek Evaluation Board ....................................................................................................... 8
EVB_RT6212AHGJ6F-00
October 2015
1
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
Introduction
General Product Information
The RT6212A is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A
output current from a 4.5V to 18V input supply. The RT6212A adopts ACOT architecture to allow the transient
response to be improved and keep in constant frequency. Cycle-by-cycle current limit provides protection against
shorted outputs and soft-start eliminates input current surge during start-up. Fault conditions also include output
under voltage protection, output over current protection, and thermal shutdown.
Product Feature
Integrated 163mΩ/86mΩ MOSFETs
4.5V to 18V Supply Voltage Range
500kHz Switching Frequency
ACOT Control
0.8V±1.5% Voltage Reference
Internal Start-Up into Pre-biased Outputs
Compact Package : TSOT-23-6 Pin
Over-Current Protection and Hiccup
Key Performance Summary Table
Key Features
Evaluation Board Number : PCB039_V1
Default Input Voltage
12V
Max Output Current
2A
Default Output Voltage
1.2V
Default Marking & Package Type
RT6212AHGJ6F, TSOT-23-6 (FC)
Operation Frequency
Fixed 500kHz
EVB_RT6212AHGJ6F-00
October 2015
2
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
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
Floating this pin or connecting this pin to GND can disable the
device and connecting this pin to logic high can enable the
device.
GND
Ground
System Ground. Provides the ground return path for the control
circuitry and low-side power MOSFET.
BOOT
Bootstrap supply test point
Bootstrap Supply for High-Side Gate Driver. Connect a 0.1µF or
greater capacitor from LX to BOOT to power the high-side switch.
FB
Feedback Voltage Input.
This pin is used to set the desired output voltage via an external
resistive divider. The feedback voltage is 0.8V typically.
LX
Switch node test point
LX is the switching node that supplies power to the output and
connect the output LC filter from LX to the output load.
EVB_RT6212AHGJ6F-00
October 2015
3
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
Power-up & Measurement Procedure
1. Apply a 12V nominal input power supply (4.5V < VIN < 18V) to the VIN and GND terminals.
2. Set the jumper at JP2 to connect terminals 2 and 3, connecting EN to enable operation.
3. Verify the output voltage (approximately 1.2V) between VOUT and GND.
4. Connect an external load up to 2A to the VOUT and GND terminals and verify the output voltage and current.
Output Voltage Setting
Set the output voltage with the resistive divider (R2, R3) between VOUT and GND with the midpoint connected to
FB. The output is set by the following formula :
VOUT = 0.8 x (1 +
R2
)
R3
EVB_RT6212AHGJ6F-00
October 2015
4
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
Schematic, Bill of Materials & Board Layout
EVB Schematic Diagram
Bill of Materials
Reference
Qty
Part Number
Description
Package
Manufacture
U1
1
RT6212AHGJ6F
DC/DC Converter
TSOT-23-6 (FC)
RICHTEK
C3, C9
2
C3225X5R1E226MT
22µF/25V/X7R
C-1210
TDK
C8
1
C1608X7R1H104K080AA
0.1µF/±10%/50V/X7R
C-0603
TDK
C1, C4, C6,
C10, C11,
C12, D2
7
N/A
R2
1
12kΩ
R-0603
R3
1
24kΩ
R-0603
R5
1
100kΩ
R-0603
L1
1
2.2µH/12.5A
8.4 x 7.9 x 7.2 mm
EVB_RT6212AHGJ6F-00
7443340220
October 2015
5
WE
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
PCB Layout
Top View (1st layer)
PCB Layout—Inner Side (2nd Layer)
EVB_RT6212AHGJ6F-00
October 2015
6
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
PCB Layout—Inner Side (3rd Layer)
Bottom View (4th Layer)
EVB_RT6212AHGJ6F-00
October 2015
7
http://www.richtek.com
RT6212AHGJ6F
Evaluation Board
your power partner.
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.
EVB_RT6212AHGJ6F-00
October 2015
8
http://www.richtek.com
很抱歉,暂时无法提供与“EVB_RT6212AHGJ6F”相匹配的价格&库存,您可以联系我们找货
免费人工找货- 国内价格 香港价格
- 1+389.786791+47.02593