mailto:evb_service@richtek.com
Richtek TechnologyRichtek Technology
Instruction Manual for RICHTEK models including: RTQ2072BAGQVT-QT Evaluation Board, RTQ2072BAGQVT-QT, Evaluation Board, Board
5 days ago — LDOOUT. LDO output voltage. VEXT. Additional BUCK2, BUCK3 and LDO input voltage. VCC. Additional pull high voltage for PG indication. JP1.
20 sept. 2023 — The Evaluation Board demonstrates the RTQ2072BAGQVT-QT-11 to be designed with three step down converters and one high PSRR low-dropout (LDO) regulator for ...
File Info : application/pdf, 12 Pages, 1.28MB
DocumentDocumentyour power partner. RTQ2072BAGQVT-QT Evaluation Board Automotive CIS/CCM PMIC for Ultra Compact Camera and High Image Quality System General Description The Evaluation Board demonstrates the RTQ2072BAGQVT-QT-11 to be designed with three step down converters and one high PSRR low-dropout (LDO) regulator for automotive camera applications. The high-voltage step down converter is operated with input voltage range up to 18.5V for Power Over Coax (POC) connection. Two low-voltage step down converters provide constant output voltage. All step down converters operate in a forced fixed-frequency PWM mode. The LDO output voltage is easily set via an external resistor. The RTQ2072B provides 10 power sequences by a resistor on SEQ pin for flexibility. Table of Contents General Description ......................................................................................................................................................1 Performance Specification Summary ...........................................................................................................................2 Power-up Procedure .....................................................................................................................................................2 Detailed Description of Hardware .................................................................................................................................4 Bill of Materials..............................................................................................................................................................6 Typical Applications ......................................................................................................................................................7 Evaluation Board Layout.............................................................................................................................................10 More Information.........................................................................................................................................................12 Important Notice for Richtek Evaluation Board...........................................................................................................12 EVB_RTQ2072BAGQVT-QT-00 September 2023 1 http://www.richtek.com your power partner. RTQ2072BAGQVT-QT Evaluation Board Performance Specification Summary Summary of the RTQ2072B Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C. Table 1. RTQ2072B Evaluation Board Performance Specification Summary Specification Test Conditions Min Typ Max Unit Input Voltage Range 4 -- 18.5 V Buck1 Output Current 2 -- -- A Buck2 Output Current 1.5 -- -- A Buck3 Output Current 0.75 -- -- A LDO Output Current 300 -- -- mA Buck1 Default Output Voltage -- 3.6 -- V Buck2 Default Output Voltage -- 1.1 -- V Buck3 Default Output Voltage -- 1.8 -- V LDO Default Output Voltage -- 3.3 -- V Buck Operation Frequency -- 2.1 -- MHz Buck1 Ripple Voltage VIN = 6V, VOUT = 3.6V, one switching cycle -- 20 -- mVpp Buck2 Ripple Voltage VIN = 3.6V, VOUT = 1.1V, one switching cycle -- 10 -- mVpp Buck3 Ripple Voltage VIN =3.6V, VOUT = 1.8V, one switching cycle -- 10 -- mVpp Buck1 Load Transient Response VIN = 6V, VOUT = 3.6V, IOUT = 10mA to 500mA, 1µs -- 150 -- mV Buck2 Load Transient Response VIN = 3.6V, VOUT = 1.1V, IOUT = 10mA to 500mA, 1µs -- 50 -- mV Buck3 Load Transient Response VIN = 3.6V, VOUT = 1.8V, IOUT = 10mA to 300mA, 1µs -- 50 -- mV LDO Load Transient Response VIN = 3.6V, VOUT = 3.3V, IOUT = 10mA to 200mA, 1µs -- 25 -- mV Power-up Procedure Suggestion Required Equipments RTQ2072B Evaluation Board DC power supply capable of at least 20V and 2A (depends on application) Electronic load capable of 2A (depends on application) Function Generator Oscilloscope Quick Start Procedures The Evaluation Board is fully assembled and tested. Follow below steps to verify board operation. Do not turn on supplies until all connections are made. When measuring the output voltage ripple, care must be taken to avoid a EVB_RTQ2072BAGQVT-QT-00 September 2023 2 http://www.richtek.com your power partner. RTQ2072BAGQVT-QT Evaluation Board long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor. Follow below procedure for proper setup of measurement and EVB operation. 1) With power off state, connect the input power supply to VIN and GND pins. 2) With power off state, connect the electronic load between the VOUT and nearest GND pins. 3) Turn on the power supply at the input. Make sure that the input voltage does not exceeds 24VAMR on the Evaluation Board. 4) Check for the proper output voltage using a voltmeter. 5) Once the proper output voltage is established, adjust the load within the operating ranges and observe the output voltage regulation, ripple voltage, efficiency and other performance. EVB_RTQ2072BAGQVT-QT-00 September 2023 3 http://www.richtek.com your power partner. Detailed Description of Hardware Headers Description and Placement RTQ2072BAGQVT-QT 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. Test Points The EVB is provided with the test points and pin names listed in the below table. Test Point/ Pin Name Function VIN Input voltage. VBUCK1 BUCK1 output voltage. VBUCK2 BUCK2 output voltage. VBUCK3 BUCK3 output voltage. LDOOUT LDO output voltage. VEXT Additional BUCK2, BUCK3 and LDO input voltage. VCC Additional pull high voltage for PG indication. JP1 PG pull high voltage supplied by VCC if short connection. Deafult is non-connected. JP2 PG pull high voltage supplied by BUCK3 if short connection. Deafult is connected. CP4 BUCK2/BUCK3 input voltage supplied by BUCK1 if short connection. Deafult is connected. CP5 BUCK2/BUCK3 input voltage supplied by VEXT if short connection. Deafult is non-connected. EVB_RTQ2072BAGQVT-QT-00 September 2023 4 http://www.richtek.com your power partner. RTQ2072BAGQVT-QT Evaluation Board Test Point/ Pin Name CP9 CP10 GND PG Function LDO input voltage supplied by VEXT if short connection. Deafult is non-connected. LDO input voltage supplied by BUCK1 if short connection. Deafult is connected. Ground. Power-good indication test point. EVB_RTQ2072BAGQVT-QT-00 September 2023 5 http://www.richtek.com your power partner. Bill of Materials Reference Count U1 1 C1 1 C2 1 C3 1 C4, C5, C6 3 C7 1 C8, C9 2 L1 1 L2, L3 2 R1 1 R2 1 R6, R7 2 R8 1 Part Number RTQ2072BAGQVT-QT-11 GCJ31CR71E475KA12 GRT188C81C475KE13 GRT155R71C104KE01 GRT188C81A106ME13 GRT155C81A105KE01 GRT155C81A225KE13 TFM201610ALMA1R5MTAA TFM201610ALMA1R0MTAA MR02X1372FAL MR02X3921FAL MR02X000 PAL MR02X1002FAL RTQ2072BAGQVT-QT Evaluation Board Description PMIC 4.7µF/25V/X7R 4.7µF/16V/X6S 0.1µF/16V/X7R 10µF/10V/X6S 1µF/10V/X6S 2.2µF/10V/X6S 1.5µH 1µH 13.7k 3.92k 0 10k Package WETD-VQFN- 16L 3x3 1206 0603 0402 0603 0402 0402 0806 0806 0201 0201 0201 0201 Manufacturer RICHTEK MURATA MURATA MURATA MURATA MURATA MURATA TDK TDK WALSIN WALSIN WALSIN WALSIN EVB_RTQ2072BAGQVT-QT-00 September 2023 6 http://www.richtek.com your power partner. Typical Applications RTQ2072BAGQVT-QT Evaluation Board EVB Schematic Diagram VIN 1 GND 1 VEXT 1 1 CP4 VOUT1 C1 VEXT CP5 2 1 U1 2 VIN 7 PVD23 C2 2 CP9 VEXT VOUT1 CP10 2 1 10 SEQ 12 RSET 1 R6 R7 2 15 PVCC 1 2 C7 1 AGND 1 14 LDOIN C8 2 17 PGND 4 BOOT 3 SW1 16 FB1 6 SW2 2 1 C3 1 L1 2 1 L2 2 5 VOUT2 8 SW3 1 L3 2 9 VOUT3 VOUT3 13 LDOOUT 11 PG 1 PG 2 1 2 1 2 1 2 1 2 1 VOUT1 1 VBUCK1 1 C4 C10 R1 2 1 2 2 R2 1 VBUCK2 1 C5 C11 2 C6 C12 1 1 VBUCK3 2 C9 C13 1 1 LDOOUT 1 R8 2 1 VCC JP1 1 21 2 VOUT3 JP2 1 21 2 1. The capacitance of the input and output capacitors will influence the input and output voltage ripple. 2. MLCC capacitors have degrading capacitance at DC bias voltage and temperature. Especially, smaller size MLCC capacitors will have much lower capacitance. EVB_RTQ2072BAGQVT-QT-00 September 2023 7 http://www.richtek.com your power partner. Measure Result BUCK1 Efficiency RTQ2072BAGQVT-QT Evaluation Board BUCK1 Load Regulation BUCK2 Efficiency BUCK2 Load Regulation BUCK3 Efficiency BUCK3 Load Regulation EVB_RTQ2072BAGQVT-QT-00 September 2023 8 http://www.richtek.com your power partner. LDO Load Regulation RTQ2072BAGQVT-QT Evaluation Board LDO Dropout Voltage LDO PSRR LDO Output Noise Power-On Power-Off Note: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the output capacitor. EVB_RTQ2072BAGQVT-QT-00 September 2023 9 http://www.richtek.com your power partner. RTQ2072BAGQVT-QT Evaluation Board Evaluation Board Layout Figure 1 to Figure 4 are RTQ2072BAGQVT-QT Evaluation Board layout. This board size is 70mm x 50mm and is constructed on four-layer PCB with 2 oz. Cu. Figure 1. Top View (1st layer) Figure 2. PCB Layout--Inner Side (2nd Layer) EVB_RTQ2072BAGQVT-QT-00 September 2023 10 http://www.richtek.com your power partner. RTQ2072BAGQVT-QT Evaluation Board Figure 3. PCB Layout--Inner Side (3rd Layer) Figure 4. Bottom View (4th Layer) EVB_RTQ2072BAGQVT-QT-00 September 2023 11 http://www.richtek.com your power partner. RTQ2072BAGQVT-QT 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_RTQ2072BAGQVT-QT-00 September 2023 12 http://www.richtek.com