LM2717MT-ADJEV

www.ti.com Trademarks User’s Guide LM2717-ADJ Step-Down Converter Evaluation Module User's Guide ABSTRACT The LM2717-ADJ is composed of two high current pulse width modulation (PWM) DC/DC buck converters. The first buck (step-down) converter provides an adjustable output at up to 1.5 A while the second buck converter provides an adjustable output at up to 2.5 A. The LM2717-ADJ evaluation board is designed for 1.8-V output at up to 1.5 A and 3.3-V output up to 2.4 A with an input voltage range of 5 V to 15 V. The board is ideally set up for converting a standard 12-V rail to 1.8 V and 3.3 V found in many applications. Either output can be changed to fit other applications as desired. If other output voltages are desired the output capacitors on the evaluation board are rated for 6.3 V so outputs up to 5 V can be used. For outputs greater than 5 V, the output capacitors need to be changed to capacitors with a higher voltage rating. Extra pads are provided for the output capacitors to accommodate a variety of output capacitance and output capacitor ESR requirements for any application. The schematic is shown in Figure 1-1 and the bill of materials (BOM) is discussed in Table 2-1. Trademarks All trademarks are the property of their respective owners. SNVA155B – MAY 2006 – REVISED DECEMBER 2021 Submit Document Feedback LM2717-ADJ Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Schematic and Layout www.ti.com 1 Schematic and Layout RFB1 8.66k L1 10 PH CBOOT1 RFB2 20.5k 1 PF U1 47 nF 2k 82 nF RC1 CBG 1 nF CC2 2k 82 nF RC2 CSS2 47 nF AGND RF 22.6k COUT1D,E D1 CSS1 CC1 1.8V OUT1 CB1 SW1 FB1 SHDN1 SS1 VC1 VIN VBG VIN VC2 SHDN2 CB2 SS2 5V to 15V IN VIN FSLCT FB2 AGND AGND SW2 PGND AGND PGND PGND 2 x 47 PF CBOOT2 CIN1 1 PF ceramic CIN2 1 PF ceramic L2 10 PH 1 PF D2 PGND CIN 68 PF 3.3V OUT2 RFB3 COUT2D,E 33.2k 2 x 47 PF LM2717-ADJ RFB4 20k PGND Figure 1-1. Schematic 2 LM2717-ADJ Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SNVA155B – MAY 2006 – REVISED DECEMBER 2021 Submit Document Feedback www.ti.com Bill of Materials 2 Bill of Materials Table 2-1. Bill of Materials (BOM) Designator Component Manufacturer U1 LM2717MT-ADJ, TSSOP-24 Texas Instruments L1, L2 10 µH, DO3316P-103 Coilcraft, (800) 322-2645 CIN 68 µF, 20 V Tantalum, 595D686X9025R Sprague (Vishay), (407) 324-4140 CIN1, CIN2, CBOOT1, CBOOT2 1 µF, Ceramic, LMK316BJ105ML Taiyo Yuden, (408) 573-4150 COUT1D, COUT1E, COUT2D, COUT2E 47 µF, 6.3 V Ceramic, GRM32ER60J476ME20 Murata, www.murata.com D1, D2 2 A, 40 V Schottky, MBRS240LT On Semiconductor CC1, CC2 82 nF, 1206 Case, VJ1206A823KXAA Vitramon (Vishay), (203) 268-6261 CBG 1 nF, 1206 Case, VJ1206A102KXAA Vitramon (Vishay), (203) 268-6261 CC3, CC4 Open CSS1, CSS2 47 nF, 1206 Case, VJ1206A473KXAA Vitramon (Vishay), (203) 268-6261 RFB3 33.2 k, 1206 Case, CRCW12063322F Dale (Vishay), (402) 564-3131 RFB4 20 k, 1206 Case, CRCW12062002F Dale (Vishay), (402) 564-3131 RC1, RC2 2 k, 1206 Case, CRCW12062001F Dale (Vishay), (402) 564-3131 RF 22.6 k, 1206 Case, CRCW12062262F Dale (Vishay), (402) 564-3131 RPU 100 k, 1206 Case, CRCW12061003F Dale (Vishay), (402) 564-3131 RFB1 8.66 k, 1206 Case, CRCW12068661F Dale (Vishay), (402) 564-3131 RFB2 20.5 k, 1206 Case, CRCW12062052F Dale (Vishay), (402) 564-3131 Test Posts (7) 160-2141-02-01-00 Cambion 3 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (April 2013) to Revision B (December 2021) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................1 • Updated the user's guide title............................................................................................................................. 1 SNVA155B – MAY 2006 – REVISED DECEMBER 2021 Submit Document Feedback LM2717-ADJ Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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