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User Guide for RICHTEK models including: RTQ2540HN-TA Evaluation Board, RTQ2540HN-TA, Evaluation Board, Board
il y a 2 jours — User Guide for RTQ2540H Low Dropout Linear Regulator. Evaluation Board. General Description. The RTQ2540H is a high-current, ultra-low noise, ultra low-dropout ...
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DocumentDocumentyour power partner. RTQ2540HN-TA Evaluation Board User Guide for RTQ2540H Low Dropout Linear Regulator Evaluation Board General Description The RTQ2540H is a high-current, ultra-low noise, ultra low-dropout (LDO) linear regulator. This document explains the function and use of the RTQ2540H evaluation board (EVB) and provides information for the setup and operating instructions, a schematic diagram, a printed circuit board (PCB) layout, and a bill of materials (BOM). For more detail information, please refer to the RTQ2540H datasheet. Table of Contents General Description ......................................................................................................................................................1 Performance Specification Summary ...........................................................................................................................2 Power-up & Measurement Procedure ..........................................................................................................................2 Detailed Description of Hardware .................................................................................................................................3 Bill of Materials..............................................................................................................................................................5 Typical Applications ......................................................................................................................................................6 Evaluation Board Layout...............................................................................................................................................8 More Information.........................................................................................................................................................10 Important Notice for Richtek Evaluation Board...........................................................................................................10 EVB_RTQ2540HN-TA-00 May 2024 1 http://www.richtek.com your power partner. RTQ2540HN-TA Evaluation Board Performance Specification Summary The RTQ2540H Evaluation Board (EVB) is a four-layer board measuring 50mm x 33.5mm with a copper thickness of 1oz, and the Table 1 is the summary of the EVB performance specificiaiton. Table 1. RTQ2540H Evaluation Board Performance Specification Summary Key Features Test Conditions Min Typ Max Unit Input Range Input Voltage 1.1 1.1 6.5 V Enable Input Voltage 1.1 -- 6.5 V Output Range Output Voltage Using external resistive voltage divider 0.8 0.8 5.5 V Line Regulation IOUT = 1mA, 1.1V VIN 6.5V -- 0.05 -- %/V Load Regulation 1mA IOUT 4A -- 0.08 -- %/A Dropout Voltage VIN = 1.1V to 6.5V, IOUT = 4A, VFB = 0.8V - 3% -- 70 145 mV Package WQFN-12L 2.2x2.5 (FC) Power-up & Measurement Procedure Suggestion Required Equipments: RTQ2540H evaluation board DC power supply capable of at least 6.5V and 4A Electronic load capable of 4A Function generator Oscilloscope Test Procedure with Suitable Measurement Equipment: Connect input power supply with wide and short as possible to VIN and GND through GP1/GP2 terminals. Connect the electronic load to VOUT and GND through GP3/GP4 terminals. Turn on the power supply and make sure that the input voltage does not exceeds 6V. Check output voltage regulation with different IOUT for normal operation. Notifications: Do not turn on input power supply before all connections are ready. Do not use the oscilloscope probe with long ground lead for output ripple voltage measurement, it is recommended to touch the probe tip and groundring directly across the last output capacitor. EVB_RTQ2540HN-TA-00 May 2024 2 http://www.richtek.com your power partner. Detailed Description of Hardware Headers Description and Placement RTQ2540HN-TA Evaluation Board Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at evb_service@richtek.com. EVB_RTQ2540HN-TA-00 May 2024 3 http://www.richtek.com your power partner. RTQ2540HN-TA Evaluation Board Test Points The EVB is provided with the test points and pin names listed in the table below. Test Point Pin Name Description GP1 VIN Positive terminal for supply input voltage. GP2 GND Negative terminal for supply input voltage. GP3 VOUT Positive terminal for output voltage. GP4 GND Negative terminal for output voltage. GP5 GND Reference ground test point. TP1 VIN For supply input voltage measurement. TP2 EN Enable voltage input pin. TP3 PGOOD For power good measurement. TP4 VOUT For output voltage measurement. JP1 Enable Connection for Enable voltage. JP2 PGOOD Connection for power good pu-ll high voltage. EVB_RTQ2540HN-TA-00 May 2024 4 http://www.richtek.com your power partner. Bill of Materials Reference U1 Count 1 Part Number RTQ2540HN-TA C3, C6 2 1210X476K160CT C4, C5 2 0603B104K500CT C9, C11 2 0603B103K500CT C10 1 0603B105K250CT R1 1 RTT031182FTP R2 1 WR06X3741FTL R3, R5 2 WR06X1003FTL RTQ2540HN-TA Evaluation Board Description Linear Regulator Capacitor, Ceramic, 47µF, 16V, X5R Capacitor, Ceramic, 0.1µF, 50V, X7R Capacitor, Ceramic, 10nF, 50V, X7R Capacitor, Ceramic, 1µF, 25V, X5R Resistor, Chip, 11.8k, 1% Resistor, Chip, 3.74k, 1% Resistor, Chip, 100k, 1% Package WQFN-12L 2.2x2.5 (FC) C-1210 Manufacturer RICHTEK WALSIN C-0603 WALSIN C-0603 WALSIN C-0603 WALSIN R-0603 RALEC R-0603 WALSIN R-0603 WALSIN EVB_RTQ2540HN-TA-00 May 2024 5 http://www.richtek.com 2 2 your power partner. Typical Applications EVB Schematic Diagram GP1 1 VIN GP2 1 GND 2 1 VIN 1 1 1 C1 C2 C3 C4 2 2 2 EN U1 1 VIN_1 2 VIN_2 3 EN 11 VOUT_1 10 VOUT_2 9 FB 1 JP1 VIN Enable 1 12 23 3 12 2 4 NR/SS 8 PGOOD 1 R3 C11 5 NC 7 GND_1 1 R4 C10 6 GND_2 12 GND_3 2 12 1 RTQ2540HN-TA Evaluation Board 2 R1 C9 1 R2 2 1 VOUT 1 GP3 VOUT 1 1 1 C5 C6 C7 C8 2 2 2 1 GP4 GND 1 GP5 GND PGOOD JP2 PGOOD 1 12 23 3 VIN 1 VOUT R5 2 PGOOD VOUT-SENSE1 4 2 4 2 1 1 5 5 3 3 VOUT VIN-SENSE1 4 2 VIN 4 2 1 1 5 5 3 3 EVB_RTQ2540HN-TA-00 May 2024 6 http://www.richtek.com your power partner. Measure Result PSRR vs. Frequency and VOUT Power-Supply Rejection Ratio (dB) 100 VIN = VOUT + 0.3V, IOUT = 4A, 80 COUT = 47mF//10mF//10mF, CNR/SS = 10nF, CFF = 10nF 60 VOUT = 0.8V 40 VOUT = 0.9V VOUT = 1.1V VOUT = 1.2V 20 VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V 0 10 100 1K 10K 100K 1M Frequency (Hz) Output Noise vs. Frequency and VOUT 10 VIN = VOUT + 0.3V, IOUT = 4A, COUT = 47mF//10mF//10mF, 1 CNR/SS = 10nF, CFF= 10nF Output Spectral Noise Density (V/Hz) 0.1 0.01 0.001 10 VOUT = 0.8V VOUT = 3.3V VOUT = 5V 100 1K 10K 100K 1M 10M Frequency (Hz) Power Up Response Output Spectral Noise Density (V/Hz) Power-Supply Rejection Ratio (dB) RTQ2540HN-TA Evaluation Board PSRR vs. Frequency and IOUT 100 80 60 40 20 0 10 IOUT = 0.1A IOUT = 0.5A IOUT = 1A IOUT = 2A IOUT = 3A IOUT = 4A VIN = 1.1V, VOUT = 0.8V, COUT = 47mF//10mF//10mF, CNR/SS = 10nF, CFF = 10nF 100 1K 10K 100K 1M Frequency (Hz) Output Noise vs. Frequency and CNR/SS 10 CNR/SS = 0nF 1 CNR/SS = 1nF CNR/SS = 10nF CNR/SS = 100nF 0.1 0.01 0.001 10 VIN = 1.1V, VOUT = 0.8V, IOUT = 4A, COUT = 47mF//10mF//10mF, CFF = 10nF 100 1K 10K 100K 1M 10M Frequency (Hz) Load Transient Response EVB_RTQ2540HN-TA-00 May 2024 7 http://www.richtek.com your power partner. Evaluation Board Layout Figure 1 to Figure 4 are the RTQ2540H evaluation board layout. RTQ2540HN-TA Evaluation Board Figure 1. Top View (1st layer) Figure 2. Inner Side (2nd Layer) EVB_RTQ2540HN-TA-00 May 2024 8 http://www.richtek.com your power partner. RTQ2540HN-TA Evaluation Board Figure 3. Inner Side (3rd Layer) Figure 4. Bottom View (4th Layer) EVB_RTQ2540HN-TA-00 May 2024 9 http://www.richtek.com your power partner. RTQ2540HN-TA Evaluation Board More Information For more information, please find the related datasheet or application notes from Richtek website http://www.richtek.com. Important Notice for Richtek Evaluation Board THIS DOCUMENT IS FOR REFERENCE ONLY, NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK'S WARRANTY, EXPRESS OR IMPLIED, UNDER CONTRACT, TORT OR STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE TO BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES. EVB_RTQ2540HN-TA-00 May 2024 10 http://www.richtek.com