General Product Information
The RT6200 is a high voltage Buck converter that can support the input voltage range from 4.5V to 36V and the output current can be up to 0.6A. Current mode operation provides fast transient response and eases loop stabilization. The chip also provides protection functions such as cycle-by-cycle current limit and thermal shutdown protection. The RT6200 is available in the SOT-23-6 package.
Key Performance Summary Table
Evaluation Board Number: PCB008_V1
Default Input Voltage
Max Output Current
Default Output Voltage
Default Marking & Package Type
Steady 1.2MHz at all loads
Other Key Features
4.5V to 36V Input Voltage Range
Support duty up to 95%
Cycle-By-Cycle Over Current Protection
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 firstname.lastname@example.org
The EVB is provided with the test points and pin names listed in the table below.
Comment (expected waveforms or voltage levels on test points)
Input voltage range= 4.5V to 36V
Default output voltage = 5.0V
Output voltage range= 0.8V to 15V
(see ‘’Output Voltage Setting’’ section for changing output voltage level)
Switching node test point
Enable test point
Enable signal. EN is automatically pulled high by internal circuit to enable operation. Connect EN low (or by R4 pull low resistor) to disable operation.
Boot strap supply test point
Floating supply voltage for the high-side N-MOSFET switch
Power-up & Measurement Procedure
1.Apply a 12V nominal input power supply (4.5V < VIN < 36V) to the VIN and GND terminals.
2.The EN voltage is pulled to logic high by internal circuit to enable operation. Drive EN high (>2.5V) to enable operation or low (<0.4V) to disable operation.
3.There is a 3-pin header JP2 “EN” for enable control. To use a jumper at “H” option to tie EN test pin to input power VIN for enabling the device. Inversely, to use a jumper at “L” option to tie EN test pin and ground GND for disabling the device.
4.Verify the output voltage (approximately 5.0V) between VOUT and GND.
5.Connect an external load up to 0.6A 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:
The installed VOUT capacitor (C4) is 22μF, 16V X5R ceramic types. Do not exceed their operating voltage range and consider their voltage coefficient (capacitance vs. bias voltage) and ensure that the capacitance is sufficient to maintain stability and provide sufficient transient response for your application. This can be verified by checking the output transient response as described in the RT6200 IC datasheet.
EVB Schematic Diagram
C2: 10μF/50V/X5R, 1206, TDK C3216X5R1H106K
C4: 22μF/16V/X5R, 1210, Murata GRM32ER61C226K
L1: 15μH TAIYO YUDEN NR8040T150M, DCR=50mΩ
Bill of Materials
15μH/2.7A/±20%, DCR=50mΩ, Inductor
40V/3A Schottky Diode
C1, C3, C5, C6, C7, C9, C10, R4, R5, D2
BST, SW, EN
VIN, GND, VOUT, GND, GND, GND
Top View (1stlayer)
Bottom View (4th Layer)
Component Placement Guide—Component Side (1stlayer)
PCB Layout—Component Side (1stLayer)
PCB Layout—Bottom Side (4th layer)