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LM20145 Datasheet(PDF) 22 Page - Texas Instruments |
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LM20145 Datasheet(HTML) 22 Page - Texas Instruments |
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22 / 29 page  PVIN SW AGND FB PGOOD EN SS/TRK AVIN COMP LM20145 L RF VCC PGND CIN RC1 CC1 VIN CSS CVCC COUT VOUT RFB2 RFB1 CF RT RT (optional) CC2 LM20145 SNVS530E – OCTOBER 2007 – REVISED MARCH 2013 www.ti.com Typical Application Circuits This section provides several application solutions with a bill of materials. All bill of materials reference the below figure. The compensation for these solutions were optimized to work over a wide range of input and output voltages; if a faster transient response is needed reduce the value of CC1 and calculate the new value for RC1 as outline in the design guide. Bill of Materials (VIN = 5V, VOUT = 3.3V, FSW = 300kHz, IOUTMAX = 5A) Designator Description Part Number Manufacturer Qty U1 Synchronous Buck Regulator LM20145 Texas Instruments 1 CIN 100 µF, 1210, X5R, 6.3V GRM32ER60J107ME20 Murata 1 COUT 330 µF, 6.3V 6TPE330ML Sanyo 1 L 2.2 µH, 8.2 m Ω IHLP4040DZER2R2M01 Vishay 1 RF 1 Ω, 0603 CRCW06031R0J-e3 Vishay-Dale 1 CF 100 nF, 0603, X7R, 16V GRM188R71C104KA01 Murata 1 CVCC 1 µF, 0603, X5R, 6.3V GRM188R60J105KA01 Murata 1 RC1 49.9 k Ω, 0603 CRCW06034992F-e3 Vishay-Dale 1 CC1 2.2 nF, 0603, X7R, 25V VJ0603Y222KXXA Vishay-Vitramon 1 CC2 100 pF, 0603, COG, 50V VJ0603A101KXAA Vishay-Dale 1 CSS 33 nF, 0603, X7R, 25V VJ0603Y333KXXA Vishay-Vitramon 1 RT 205 k Ω, 0603 CRCW06032053F-e3 Vishay-Dale 1 RFB1 31.6 k Ω, 0603 CRCW06033162F-e3 Vishay-Dale 1 RFB2 10.2 k Ω, 0603 CRCW06031022F-e3 Vishay-Dale 1 Bill of Materials (VIN = 3.3V to 5V, VOUT = 1.2V, FSW = 300kHz, IOUTMAX = 5A) Designator Description Part Number Manufacturer Qty U1 Synchronous Buck Regulator LM20145 Texas Instruments 1 CIN 100 µF, 1210, X5R, 6.3V GRM32ER60J107ME20 Murata 1 COUT 330 µF, 6.3V 6TPE330ML Sanyo 1 L 2.2 µH, 8.2 m Ω IHLP4040DZER2R2M01 Vishay 1 RF 1 Ω, 0603 CRCW06031R0J-e3 Vishay-Dale 1 CF 100 nF, 0603, X7R, 16V GRM188R71C104KA01 Murata 1 CVCC 1 µF, 0603, X5R, 6.3V GRM188R60J105KA01 Murata 1 RC1 20 k Ω, 0603 CRCW06032002F-e3 Vishay-Dale 1 CC1 3.3 nF, 0603, X7R, 25V VJ0603Y332KXXA Vishay-Vitramon 1 CC2 330 pF, 0603, COG, 50V VJ0603A331AKXAA Vishay-Dale 1 CSS 33 nF, 0603, X7R, 25V VJ0603Y333KXXA Vishay-Vitramon 1 RT 205 k Ω, 0603 CRCW06032053F-e3 Vishay-Dale 1 RFB1 4.99 k Ω, 0603 CRCW06034991F-e3 Vishay-Dale 1 RFB2 10 k Ω, 0603 CRCW06031002F-e3 Vishay-Dale 1 22 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LM20145 |
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