LMR23630AEVM

User's Guide SNVU531A – June 2016 – Revised July 2016 LMR23630A EVM User's Guide The Texas Instruments LMR23630AEVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMR23630A wide-input Simple Switcher® buck regulator. This document describes the setup and the input / output connections of the EVM. Included are the board layout, schematic, and bill of materials. 1 Introduction The LMR23630 is a 36 V, 3 A step-down synchronous regulator with 75 µA quiescent current. With a wide input range from 4.5 V to 36 V, it is suitable for a wide range of applications from automotive to industry for power conditioning from unregulated sources. The LMR23630AEVM evaluation board is designed to provide the design engineer to evaluate the LMR23630 series operation and performance. Figure 1. LMR23630AEVM Board • • • • • • EVM Features 4.5 V to 36 V Input Voltage Range Jumper Selectable Output Options (5 V or 3.3 V) Up to 3 A Output Current Switching Frequency 400 kHz Frequency Synchronization to External Clock Hiccup Mode Short Current Protection The EVM contains one DC-DC converter (See Table 1) Table 1. Device and Package Configurations CONVERTER EVM IC PACKAGE U1 LMR23630AEVM LMR23630A HSOIC-8 SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback LMR23630A EVM User's Guide Copyright © 2016, Texas Instruments Incorporated 1 Setup 2 www.ti.com Setup This section describes the jumpers and connectors on the EVM and how to properly connect, set up and use the LMR23630AEVM. 2.1 Input/Output Connector Description VIN — Terminal TP6 – is the power input terminal for the converter. Adjacent to it is the GND reference ground. Use this terminal to attach the EVM to a cable harness. VOUT — Terminal TP1 – is the regulated output voltage for the converter. Adjacent to it is the GND reference ground. GND — Terminal TP4, TP7 – are the ground reference for the converter. Use these terminals to attach the EVM to a cable harness. EN — Jumper J1 – is used to enable the switch-mode converter. The device will be enabled when the respective jumper is high or floating, and disabled when low. The EVM default system UVLO is 6.2 V (typical), it also can be programmed by changing R3 or R6. Refer to LMR23630A datasheet for enable and adjustable undervoltage lockout. J1 J1 GND EN Disable GND EN Enabled by VIN UVLO J1 GND EN Enabled by System UVLO Figure 2. Enable Jumper Setting SYNC — Jumper J2 – is used to synchronize the switching frequency to external clock. Refer to datasheet for detail application information. Testpoint — TP2, TP3, TP5, TP8, TP9, TP10, TP11 – these are test points used for input/output voltage measurements and loop response measurements. 2.2 Adjusting the Output Voltage The default setting output voltage is 5.0 V. Open J3 will change output voltage from 5 V to 3.3 V. If other outputs need to be configured, then: open J3 and adjust the feedback resistors using the following equation. VOUT = VREF × ( 1 + ( R4 / R5 ) ) where • 3 VREF is 1 V (1) Board Layout Figure 3 to Figure 6 show the board layout for the LMR23630AEVM. The PCB consists of a 4-layer design. 2-oz copper planes are applied on all four layers to dissipate heat with an array of thermal vias under the thermal pad to connect to all four layers. 2 LMR23630A EVM User's Guide SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Board Layout www.ti.com Figure 3. Top Layer Figure 4. Middle Layer 1 SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback LMR23630A EVM User's Guide Copyright © 2016, Texas Instruments Incorporated 3 Board Layout www.ti.com Figure 5. Middle Layer 2 Figure 6. Bottom Layer 4 LMR23630A EVM User's Guide SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com 4 Schematic and Bill of Materials Figure 7. LMR23630AEVM Schematic SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback LMR23630A EVM User's Guide Copyright © 2016, Texas Instruments Incorporated 5 Schematic and Bill of Materials www.ti.com Table 2. LMR23630AEVM Bill of Materials (BOM) Designator Description Part Number Footprint C1 CAP, TA, 150 µF, 16 V, +/- 20%, 0.015 ohm, SMD T530X157M016ATE015 7343-43 1 C2 CAP, CERM, 1 μF, 25 V, +/- 10%, X7R, 0805 GRM219R71E105KA88D 0805 1 C3 CAP, CERM, 47 μF, 16 V, +/- 20%, X5R, 1210 GRM32ER61C476ME15L 1210 1 C5 CAP, CERM, 0.22 μF, 50 V, +/- 10%, X7R, 0805 GRM21BR71H224KA01L 0805 1 C6, C7 CAP, CERM, 4.7 μF, 50 V, +/- 10%, X7R, 1210 GRM32ER71H475KA88L 1210 2 C9 CAP, CERM, 0.47 μF, 16 V, +/- 10%, X7R, 0603 GRM188R71C474KA88D 0603 1 C10 CAP, CERM, 2.2 μF, 16 V, +/- 10%, X7R, 0603 GRM188Z71C225KE43 0603 1 C11 CAP, CERM, 1000 pF, 50 V, +/- 10%, X7R, 0603 GRM188R71H102KA01D 0603 1 J1 Header, 100mil, 3x1, Gold, TH TSW-103-07-G-S TSW-103-07-G-S 1 J2, J3 Header, 100mil, 2x1, Gold, TH TSW-102-07-G-S TSW-102-07-G-S 2 L3 Inductor, Wirewound, Metal Composite, 8.2 µH, 5.05 A, 0.0286 ohm, SMD 7447797820 WE-PDF-1045 1 R1 RES, 0, 5%, 0.1 W, 0603 CRCW06030000Z0EA 0603 1 R2 RES, 49.9, 1%, 0.1 W, 0603 CRCW060349R9FKEA 0603 1 R3 RES, 402 k, 1%, 0.1 W, 0603 CRCW0603402KFKEA 0603 1 R4 RES, 53.6k, 1%, 0.1W, 0603 CRCW060353K6FKEA 0603 1 R5 RES, 23.2 k, 1%, 0.1 W, 0603 CRCW060323K2FKEA 0603 1 R6 RES, 133 k, 1%, 0.1 W, 0603 CRCW0603133KFKEA 0603 1 R7 RES, 31.6 k, 1%, 0.1 W, 0603 CRCW060331K6FKEA 0603 1 SH-J1, SH-J3 Shunt, 100 mil, Flash Gold, Black SPC02SYAN SPC02SYAN 2 TP1, TP4, TP6, TP7 Terminal, Turret, TH, Double 1502-2 Keystone1502-2 4 TP2, TP5, TP9 Test Point, Compact, Red, TH 5005 Keystone5005 3 TP3, TP8, TP11 Test Point, Compact, Black, TH 5006 'Keystone5006 3 Test Point, Compact, Orange, TH 5008 Keystone5008 1 SIMPLE SWITCHER 36 V, 3 A Synchronous StepDown Converter, DDA0008E LMR23630ADDAR HSOIC-8 1 PCB, FR4, 4 Layers, Size 3000 x 3000 mil, Thickness 62 mil SV601280 TP10 U1 PCB 6 Quantity LMR23630A EVM User's Guide 1 SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Revision History www.ti.com Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (June 2016) to A Revision ......................................................................................................... Page • Changed the minimum input voltage spec from 4V to 4.5V as required through the document. ............................... 1 SNVU531A – June 2016 – Revised July 2016 Submit Documentation Feedback Revision History Copyright © 2016, Texas Instruments Incorporated 7 IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), 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. These resources are intended for skilled developers designing with TI products. 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