Datasheet

V
OUT
= 3.3V
50 mV/Div
2 Ps/DIV
5V/Div
V
SW
Bill of Materials www.ti.com
Switching Node and Output Voltage Waveforms
V
IN
= 12V, I
OUT
= 2A
7 Bill of Materials
Part Name Part ID Part Value Part Number Manufacturer
Buck Regulator U1 2A Buck Regulator LMR12020 Texas Instruments
Input Capacitor Cin 10 µF C1210C106K8PACTU Kemet
Bootstrap Capacitor Cboost 0.1 µF C0603C104K8RACTU Kemet
Output Capacitor Co1 22 µF GRM32ER71C226KE18L Murata
Output Capacitor Co2 22 µF GRM32ER71C226KE18L Murata
Catch Diode D1 Schottky Diode Vf = 0.32V CMS01 Toshiba
Inductor L1 3.3 µH 7447789003 Wurth Elektronik eiSos
Feedback Resistor Rfbt1 4.02k Ω CRCW06034K02FKEA Vishay-Dale
Feedback Resistor Rfbt2 5.49k Ω CRCW06035K49FKEA Vishay-Dale
Feedback Resistor Rfbb 1.02k Ω CRCW06031K02FKEA Vishay-Dale
Pull-up Resistor Ren 4.75 kΩ CRCW06034K75FKEA Vishay-Dale
Pull-down Resistor R_S 4.75 kΩ CRCW06034K75FKEA Vishay-Dale
Test Point VIN Test Point Loop 5010 Keystone
Test Point SW Test Point Loop 5012 Keystone
Test Point GND Test Point Loop 5011 Keystone
Test Point GND Test Point Loop 5011 Keystone
Test Point VOUT Test Point Loop 5013 Keystone
Test Point EN Test Point Loop 5014 Keystone
Test Point SYNC Test Point Loop 5014 Keystone
Header J1 2X1 Header, TH, 100mil TSW-102-07-G-S Samtec, Inc.
Shunt SH-J1 Black 100mil Gold Plated 969102-0000-DA 3M
Shunt
8
AN-2279 LMR12020 Evaluation Module SNVU191A–October 2012–Revised April 2013
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