DEMO MANUAL DEMO MANUAL SCP-LT3463-EVALZ SCP-LT3463-EVALZ Signal Chain Power LT3463 Dual Output Converter DESCRIPTION Demonstration circuit SCP-LT3463-EVALZ is a dual output DC-DC converter designed to create a dual polarity regulated voltage for powering several signal chains. The positive regulator is a boost converter (with 20V output) while the other is an inverting charge pump (with -20V output). Like all boards in the Signal Chain Power series, this board is designed to be easily plugged into other SCP boards to form a complete signal chain power system, enabling fast evaluation of low power signal chains. To evaluate this board, some universal SCP hardware is required, namely: SCP-INPUT-EVALZ SCP-OUTPUT-EVALZ SCP-1X5BKOUT-EVALZ SCP-THRUBRD-EVALZ Table 1. Performance Summary. SYMBOL PARAMETER VIN(MAX) Max Input Voltage VOUT(MAX) Max Output Voltage ISW(LIM) To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design. Note that this Demo Manual does not cover details important to the operation and configuration regarding the LT3463. Please refer to the LT3463 datasheet for a complete description of the part. Design files for this circuit board are available. All registered trademarks and trademarks are property of their respective owners. SCP-FILTER-EVALZ SCP-1X2BKOUT-EVALZ SCP-5X1-EVALZ NOTES MIN TYP 180 250 Positive VOUT Negative VOUT Switch Current Limit MAX 15 +40 -40 320 UNITS V V V mA BOARD IMAGE Figure 1. SCP-LT3463-EVALZ Board Rev. 0 1 DEMO MANUAL SCP-LT3463-EVALZ QUICK START PROCEDURE Demonstration circuit SCP-LT3463-EVALZ is easy to set up to evaluate the performance of any SCP hardware configuration. NOTE: Make sure that the input voltage is always within spec. If using a dynamic load to measure output voltage, make sure the load is initially set to zero. 1. The SCP-LT3463-EVALZ ships with default output voltages of 20V and -20V, respectively. To change the output voltage, see "Configuration Settings" section, and modify the board accordingly. Be sure to check for open connections or solder shorts after making any modifications. 3. Check for proper output voltages. The output should be regulated at the programmed value (5%). 2. Connect the SCP-INPUT-EVALZ and SCP-OUTPUTEVALZ boards to the SCP-LT3463-EVALZ (refer to Figure 2) and connect the input board to a voltage source, VSOURCE. Connect the output board to a voltmeter or dynamic load. Slowly raise the input voltage until the SCP-LT3463-EVALZ powers up into regulation and sweep VSOURCE through the desired range of operation. NOTE: When measuring the input or output voltage ripple, use the optional SMA connector locations available on the input, output, 1 5, 1 2, and 5 1 breakout boards. Avoid using the test point connections with long scope leads. 4. Once the proper output voltage is established, power off VSOURCE and similarly test other boards in the SCP system until all elements have been individually verified prior to assembling into the final circuit configuration. Figure 2. Proper Measurement Equipment Setup (Use SMA connectors for Measuring Input or Output Ripple) Rev. 0 2 DEMO MANUAL SCP-LT3463-EVALZ CONFIGURATION SETTINGS Demonstration circuit SCP-LT3463-EVALZ is a dual output DC-DC converter designed to create a dual polarity regulated voltage for powering several signal chains. The positive regulator is a boost converter (with 20V output) while the other is an inverting charge pump (with -20V output). SHDN PIN CONFIGURATION Each output of the SCP-LT3463-EVALZ is resistor-programmable from |5V| to |40V|. The board can be also configured to drive VIOC-capable linear regulators. To use an active run signal, use a 100kW resistor for either pull-up or pull-down resistors R9, R10, R12 and R13, short R11 and R14 with 0W, respectively, and use the drive signal from connectors P1 and P2. OUTPUT VOLTAGE PROGRAMMING The SHDN pins (SHDN1 and SHDN2) are tied to the optional SCP Run/Sequence headers P1 and P2. To create a harness for this function, use Molex part 0510650300 with crimp pin 50212-8000. R +VOUT = 1 .2 5 V 1 + 1 R2 VOLTAGE INPUT-TO-OUTPUT CONTROL (VIOC) IMPLEMENTATION R -VOUT = 1 .2 5 V 4 R3 To implement the VIOC function for both regulators, set R6 and R8 to 0W, respectively. Refer to the "Configuration Settings" section in the Demo Manual for the low-dropout (LDO) linear regulator board and use the following configuration for this board. Table 2. Resistor Selection Guide for Common Output Voltages |VOUT| (V) 5.0 R1 () 200k R2 () 66.5k R3 () 49.9k R4 () 200k 5.5 340k 100k 76.8k 340k 6.0 523k 137k 110k 523k 6.5 261k 61.9k 49.9k 261k 7.0 1.07M 232k 191k 1.07M 7.5 590k 118k 97.6k 590k 8.0 1.0M 187k 154k 1.0M 8.5 340k 59k 49.9k 340k 9.0 806k 130k 113k 806k 9.5 1.07M 162k 140k 1.07M 10.0 931k 133k 115k 931k 11.0 1.07M 137k 121k 1.07M 12.0 1.18M 137k 124k 1.18M 13.0 1.87M 200k 178k 1.87M 14.0 1.02M 100k 90.9k 1.02M 15.0 1.0M 90.9k 82.5k 1.0M 16.0 1.18M 100k 93.1k 1.18M 17.0 1.15M 90.9k 84.5k 1.15M 18.0 2.21M 165k 154k 2.21M 19.0 1.02M 71.5k 66.5k 1.02M 20.0 1.0M 66.5k 61.9k 1.0M 24.0 1.82M 100k 95.3k 1.82M 30.0 1.21M 52.3k 49.9k 1.21M 36.0 1.43M 51.1k 49.9k 1.43M 40.0 1.69M 54.9k 49.9k 1.62M Table 3. VIOC Cross-Reference Designators VIOC SETTING REFERENCES RBOT VOUT Reference Designators for VOUT1 R2 VOUT Reference Designators for VOUT2 R3 RTOP R1 R4 RMAX R5 R7 Positive VIOC Equations R + R TOP VL DOIN - VL DOOUT = VVIOC = 1 .2 5 V BOT RBOT R + R TOP + RMAX V(MAX )LDOIN = 1 .2 5 V BOT + ISINKRMAX RBOT ISINK is the current through RMAX which is typically 15A. Since the divider current is fixed due to the internal low side gain setting feedback resistor and is less than the recommended divider current of 100A, the effect of the sink current on the maximum linear regulator input voltage cannot not be mitigated and should be taken into consideration. Rev. 0 3 DEMO MANUAL SCP-LT3463-EVALZ Negative VIOC Equations R VL DOIN - VL DOOUT = VVIOC = -1 .2 5 V TOP RBOT R + RMAX R V(MAX )L DOIN = -1 .2 5 TOP + VVIOC MAX 40k RBOT Because the VLDOIN term is simply the sum of the final output voltage after the LDO and the difference the LT3463 is adding on top, it can be helpful to take the desired final output voltage, add 1.0V, and then look up that voltageresistor combination from Table 2. RMAX can then be obtained by figuring out the difference between the maximum and nominal output voltage of the LT3463, divided by the current through the internal RBOT resistor, which is 1.25/RBOT. Rev. 0 4 DEMO MANUAL SCP-LT3463-EVALZ PARTS LIST ITEM 1 2 3 4 5 6 7 8 9 10 11 QTY 1 1 2 2 1 3 1 1 1 2 2 12 2 13 14 2 6 15 16 17 18 4 1 1 1 19 2 REFERENCE PCB C1 C9, C10 C2, C3 C4 C5, C6, C7 C8 D1 INPUT L1, L2 OUTPUT+, OUTPUTP1, P2 PART DESCRIPTION PRINTED CIRCUIT BOARD CAP 4.7uF 25V CER X5R 0805 CAP MLCC 0603 (Note 1) CAP 1uF 50V CER X7R 0805 CAP 0.1uF 100V CER X7R 0603 CAP MLCC 0805 (Note 1) CAP 10pF 50V CER NP0 0805 DIODE SCHOTTKY BARRIER RECTIFIER CONN MALE 3POS 2.54MM PITCH R/A IND 10uH 0.45A 0.39-OHM CONN FEMALE 3POS 2.54MM PITCH R/A CONN-PCB 3POS HEADER WIRE TO BRD WAFER ASSY STRAIGHT 2MM PITCH R1, R4 RES 4.53M 1% THICK FILM 0805 R6, R8, R10, R11, RES THICK FILM 0805 (Note 1) R13, R14 R5, R7, R9, R12 RES 0-OHM 1% THICK FILM 0805 R2 RES 301K 1% THICK FILM 0805 R3 RES 280K 1% THICK FILM 0805 U1 IC DUAL MICROPOWER DC/DC CONVERTER WITH SCHOTTKY DIODES VIOC+, VIOCCONN FEMALE 2POS 2.54MM PITCH R/A MANUFACTURER/PART NUMBER ANALOG DEVICES 08_060170a SAMSUNG CL21A475KAQNNNG N/A SAMSUNG CL21B105KBFNNNE SAMSUNG CL10B104KC8NNNC N/A AVX 08055A100JAT2A DIODES INC B0540W-7-F SULLINS PBC03SBAN MURATA LQH32CN100K53L SULLINS PPPC031LGBN-RC MOLEX 53253-0370 VISHAY CRCW08054M53FKEA N/A VISHAY CRCW08050000Z0EA PANASONIC ERA-6AEB3013V PANASONIC ERA-6AEB2803V ANALOG DEVICES LT3463AEDD#PBF SULLINS PPPC021LGBN-RC Note 1. These items are not stuffed (DNI). Rev. 0 5 DEMO MANUAL SCP-LT3463-EVALZ SCHEMATIC DIAGRAM 8 7 7 1 2 3 VO+ VO- 6 GND R11 DNI 0 R9 0 R12 DNI R10 GND R14 DNI DNI R13 GND 5 SW1 2 VOUT1 1 L1 10UH 3 D2 FB2 VREF GND FB1 VIN SHDN1_N SW2 5 SHDN2_N 4 C4 0.1UF 100V 6 7 PAD 10 U1 LT3463 C1 4.7UF 25V GND 9 8 LT3463AEDD#PBF L2 10UH 5 D1 DNI C6 DNI C7 B0540W-7-F 4 4 R2 301K R3 280K C5 DNI R5 0 R1 DNI GND R4 C8 4.53MEG 10PF 50V DNI R8 4.53MEG R7 R6 INPUT PBC03SBAN 1 2 3 P1DNI 53253-0370 1 2 3 P2DNI 53253-0370 6 0 D C B A 8 C2 1UF 50V GND GND GND C3 1UF 50V GND 1 2 3 C9 DNI VIOC+ VO+ PPPC021LGBN-RC 1 2 VIOC- OUTPUT+ 1 2 3 PPPC031LGBN-RC OU TPUT3 2 1 PPPC031LGBN-RC AN A LOG DE V CES OWNED OR CONTRO LLED BY OWNED ANALOG DEVICES. THE EQ UIPM ENT SHOWN HEREO N MAY BE PROTECTED BY PATENTS OF ANALOG DEVICES. OR FOR ANY O THER PURPOSE DETRIM ENTAL TO THE INTERESTS IN PART, OR USED IN FURNISHI NG INFO RMATIO N TO O THERS, IT IS NO T TO BE REPRODUCED OR COPIED, IN WHO LE OR THIS DRAWING IS THE PROPERTY OF ANAL OG DEVICES INC. VO- PPPC021LGBN-RC DNI C10 3 REV 2 2 REVISIONS DESCRIPTION D D SIZE 1:1 SCALE 02_060170 1 1 SHEET DATE DRAWING NO. SCHEMATIC HW TYPE : Customer Evaluation Product(s): LT3463 : n/a <DESIGN_VIEW> DESIGN VIEW A SERQUINA PTD ENGINEER OF 2 REV A APPROVED 2 D C B A 6 GND Rev. 0 DEMO MANUAL SCP-LT3463-EVALZ Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. 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