Mixed-signal and digital signal processing ICs | Analog DevicesMixed-signal and digital signal processing ICs | Analog Devices
Owner's Manual for LINEAR TECHNOLOGY models including: LTC3838EUHF-1 High Current Dual Output Synchronous Buck Converter, LTC3838EUHF-1, High Current Dual Output Synchronous Buck Converter, Synchronous Buck Converter, Buck Converter
DEMO MANUAL DC1997A-A/DC1997A-B DESCRIPTION LTC3838EUHF-1/ LTC3838EUHF-2 High Current, Dual Output Synchronous Buck Converter
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DocumentDocumentDEMO MANUAL DC1997A-A/DC1997A-B LTC3838EUHF-1/ LTC3838EUHF-2 High Current, Dual Output Synchronous Buck Converter DESCRIPTION Demonstration circuits DC1997A-A/DC1997A-B are dual output synchronous buck converters featuring the LTC®3838EUHF-1/LTC3838EUHF-2. Both assemblies provide two outputs of 1.5V/20A and 1.2V/20A over an input voltage range of 4.5V to 14V at a switching frequency of 300kHz. Applications requiring the output to be adjusted with an external reference can be implemented with the DC1997A-B assembly. Such applications include adaptive voltage scaling optimization (AVSO) where the processor voltage is adjusted to achieve optimal efficiency, wide output voltage applications controlled by a DAC, or margining. The 2nd channel of the DC1997A-B assembly is regulated to an onboard 1.2V reference in the default setup. The same reference can be set from 0.8V to 1.5V with a potentiometer or the 2nd channel can regulate to a source external to the board. The 1st channel on the DC1997A-B assembly and both channels on the DC1997A-A version are regulated to the internal reference. The entire converter, excluding the bulk input and output capacitors, fits within a 1.5in2 area on the board. The high density is a result of the compact, 2-sided drop-in layout and the use of dual channel FETs. Additional features of this demo board include: · Remote sensing for each output. · PLLIN and CLKOUT pins. · PGOOD, RUN and TRK/SS pins for each output. · Optional resistors to tie the two outputs together. · Optional footprint for discrete single channel FETs for higher output current. · Optional footprints to implement DTR (detect transient) to reduce overshoot following a load release. Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. PERFORMANCE SUMMARY Specifications are at TA = 25°C, No Airflow PARAMETER Minimum Input Voltage Maximum Input Voltage Output Voltage VOUT1 Output Voltage VOUT2 VOUT1 Maximum Output Current, IOUT1 VOUT2 Maximum Output Current, IOUT2 Nominal Switching Frequency Efficiency (Measured on DC1997A-B Assembly) See Figure 2 CONDITION IOUT1 = 0A to 20A, VIN = 4.5V to 14V IOUT2 = 0A to 20A, VIN = 4.5V to 14V VIN = 4.5V to 14V, VOUT1 = 1.5V VIN = 4.5V to 14V, VOUT2 = 1.2V VOUT1 = 1.5V, IOUT1 = 20A, VIN = 12V VOUT2 = 1.2V, IOUT2 = 20A, VIN = 12V VALUE 4.5V 14V 1.5V ± 2% 1.2V ± 2% 20A 20A 300kHz 90.4% Typical 88.8% Typical Downloaded from Arrow.com. dc1997a-af 1 DEMO MANUAL DC1997A-A/DC1997A-B QUICK START PROCEDURE Demonstration circuit DC1997A-A/DC1997A-B is easy to set up to evaluate the performance of the LTC3838EUHF-1/ LTC3838EUHF-2. Please refer to Figure 1 for proper measurement equipment setup and follow the procedure below. 1. With power off, connect the input supply, load and meters as shown in Figure 1. Preset the load to 0A and VIN supply to be 0V. For both assemblies, place the jumpers in the following positions: JP4 RUN1 ON JP1 RUN2 ON JP2 MODE FCM The DC1997A-B assembly has additional jumpers for the reference circuit. Place these jumpers in the following positions: JP5 ON BD REF FIXED JP6 REF ON BD 2. Adjust the input voltage to be between 4.5V and 14V. VOUT1 should be 1.5V ± 2%. VOUT2 should be 1.2V ± 2%. 3. Next, apply 20A load to each output and re-measure VOUT. 4. Once the DC regulation is confirmed, observe the output voltage ripple, load step response, efficiency and other parameters. Note 1: Use the BNC connectors labeled VOUT1 or VOUT2 to measure the output volt-age ripple. Note 2: Do not connect load from the VO1_SNS+ turret to the VO1_SNS- turret or from the VO2_SNS+ turret to the VO2_SNS- turret. This could damage the converter. Only apply load across the stud connectors on the edge of the board. Reference Circuit for Channel 2 of DC1997A-B Assembly Channel 2 of the DC1997A-B assembly is configured by default to regulate to the fixed 1.2V reference generated by the LT®6650 reference circuit. If desired, this reference can be set with a potentiometer, or an external source such as a DAC or another source. See the following instructions to set the board for either: 2 Downloaded from Arrow.com. Adjusting the Onboard Reference: 1. Remove power from the input of the board. 2. Place these jumpers in the following positions: JP5 ON BD REF ADJ JP6 REF ON BD 3. Apply power to the input of the board. 4. Adjust reference with potentiometer at R52. Connecting a Reference External to the Board: 1. Remove power from the input of the board. 2. Place JP6 in the EXT position. 3. Connect the external reference between the EXTREF2+ and EXTREF2- turrets. 4. Apply power to the input of the board. 5. Turn-on the external reference. Note 3: For accurate efficiency measurements in DCM at light load at VIN greater than 5V, remove R51 and apply an external reference to the board as mentioned above. Single Output/Dual Phase Operation A single output/dual phase converter may be preferred for higher output current applications. The optional components required to tie the phases together are found on the top middle of the first sheet. To tie the two outputs together, make the following modifications: 1. Tie the two VOUT shapes together with a piece of copper at the edge of the board where the copper is exposed. 2. Tie the VOUT SENSE1+ pin to INTVCC with a 0 jumper at R8. This will tie ITH1 to ITH2 inside the chip. 3. Tie RUN1 to RUN2 by stuffing a 0 jumper at R15. 4. If DTR is implemented, then stuff 0 jumper at R9 to tie the two DTR pins together. dc1997a-af DEMO MANUAL DC1997A-A/DC1997A-B QUICK START PROCEDURE Dynamic Load Circuit (Optional) Demonstration circuit DC1997A-A/DC1997A-B provides a simple load-step circuit consisting of a MOSFET and sense resistor for each rail. To apply a load step, follow the steps below. 1. Pre-set the amplitude of a pulse generator to 0.0V and the duty cycle to 5% or less. 2. Connect the scope to the VOUT BNC connectors for the rail under test with a coax cable. To monitor the load-step current, connect the scope probe across the ISTEP+/- turrets for that rail. 3. Connect the output of the pulse generator to the PULSE turret for the rail under test and connect the return to the adjacent GND turret. 4. With the converter running, slowly increase the amplitude of the pulse generator output to provide the desired load step pulse height. The scaling for the load step signal is 5mV/Amp. VOUT2* IIN + + VIN SUPPLY V VIN IOUT2 VOUT2 LOAD + IOUT1 + VOUT1 LOAD +V A A A +V *MONITOR THE OUTPUT VOLTAGE ACROSS EITHER COUT2 OR COUT7 FOR ACCURATE EFFECIENCY MEASUREMENTS VOUT1* DC1997A F01 Figure 1. Proper Measurement Equipment Setup Downloaded from Arrow.com. dc1997a-af 3 DEMO MANUAL DC1997A-A/DC1997A-B QUICK START PROCEDURE LTC3838-2 1.5V/20A and 1.2V/20A Converter 95 FCM, VIN = 12V, fSW = 300kHz 1.5V 90 1.2V 85 EFFICIENCY (%) 80 BOTH RAILS: 75 MOSFET = INFINEON BSC0911ND (DUAL) L = WÜRTH 7443330047 0.47µH, DCR = 0.8m ±10% RSENSE = 1m 70 0 5 10 15 20 25 LOAD CURRENT (A) DC1997A F02 Figure 2. Efficiency Curves for the 1.5V Rail and 1.2V Rail of the DC1997A-B Assembly in FCM at VIN = 12V VOUT2 of the LTC3838-2 Demo Board Adjusted with External Reference 95 FCM, VIN = 12V, fSW = 300kHz 1.6V 90 1.2V 85 0.8V EFFICIENCY (%) 80 BOTH RAILS: 75 MOSFET = INFINEON BSC0911ND (DUAL) L = WÜRTH 7443330047 0.47µH, DCR = 0.8m ±10% RSENSE = 1m 70 0 5 10 15 20 25 LOAD CURRENT (A) DC1997A F04 Figure 4. Efficiency Curves for VOUT2 on the DC1997A-B Assembly at Different Output Voltage Settings 1.2VO(AC) 50mV/DIV 102mV LOAD STEP 5A/DIV 20A 10A 20µs/DIV DC1997A F06 COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206 L = WÜRTH 7443330047 (0.47µH) fSW = 300kHz Figure 6. 50% to 100% to 50% Load Step Response of the 1.2V Rail on the DC1997A-A Assembly 4 Downloaded from Arrow.com. EFFICIENCY (%) LTC3838-2 1.5V/20A and 1.2V/20A Converter 100 FCM AND DCM 90 VIN = 12V 80 fSW = 300kHz 70 60 50 40 30 20 10 0 0.001 BOTH RAILS: MOSFET = INFINEON BSC0911ND (DUAL) L = WÜRTH 7443330047 0.47µH, DCR = 0.8m ±10% RSENSE = 1m 1.5V RAIL FCM 1.2V RAIL FCM 1.5V RAIL DCM 1.2V RAIL DCM 0.01 0.1 1 10 100 LOAD CURRENT (A) DC1997A F03 Figure 3. Efficiency Curves for the 1.5V Rail and 1.2V Rail of the DC1997A-B Assembly in FCM and DCM at VIN = 12V 1.5VO(AC) 50mV/DIV 109mV LOAD STEP 5A/DIV 20A 10A 20µs/DIV DC1997A F05 COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206 L = WÜRTH 7443330047 (0.47µH) fSW = 300kHz Figure 5. 50% to 100% to 50% Load Step Response of the 1.5V Rail on the DC1997A-A Assembly 1.5VO(AC) 50mV/DIV 109mV LOAD STEP 5A/DIV 20A 10A 20µs/DIV DC1997A F07 COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206 L = WÜRTH 7443330047 (0.47µH) fSW = 300kHz Figure 7. 50% to 100% to 50% Load Step Response of the 1.5V Rail on the DC1997A-B Assembly dc1997a-af QUICK START PROCEDURE 1.2VO(AC) 50mV/DIV 97mV LOAD STEP 5A/DIV 20A 10A 20µs/DIV DC1997A F08 COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206 L = WÜRTH 7443330047 (0.47µH) fSW = 300kHz Figure 8. 50% to 100% to 50% Load Step Response of the 1.2V Rail on the DC1997A-B Assembly DEMO MANUAL DC1997A-A/DC1997A-B RUN1 2V/DIV VOUT1 TRACK/SS1 500mV/DIV 2ms/DIV CSS = 10nF VIN = 12V, FULL LOAD DC1997A F09 Figure 9. Turn-On of the 1.5V Rail of the DC1997A-A Assembly. RUN Pin Released from Ground RUN2 2V/DIV VOUT2 TRACK/SS2 500mV/DIV 2ms/DIV CSS = 10nF VIN = 12V, FULL LOAD DC1997A F10 Figure 10. Turn-On of the 1.2V Rail of the DC1997A-A Assembly. RUN Pin Released from Ground RUN1 2V/DIV VOUT1 TRACK/SS1 500mV/DIV 2ms/DIV CSS = 10nF VIN = 12V, FULL LOAD DC1997A F11 Figure 11. Turn-On of the 1.5V Rail of the DC1997A-B Assembly. RUN Pin Released from Ground RUN2 2V/DIV EXTVREF 500mV/DIV VOUT2 TRACK/SS2 500mV/DIV 2ms/DIV CSS = 4.7nF VIN = 12V, FULL LOAD DC1997A F12 Figure 12. Turn-On of the 1.2V Rail of the DC1997A-B Assembly. RUN Pin Released from Ground Downloaded from Arrow.com. dc1997a-af 5 DEMO MANUAL DC1997A-A/DC1997A-B PARTS LISTDC1997A-A ITEM QTY REFERENCE PART DESCRIPTION Required Circuit Components 1 1 C12 CAP X7R 470pF 16V 5% 0603 2 2 C21, C22 CAP X5R 10µF 16V,10% 0805 3 2 C3, C16 CAP NPO 1000pF 25V 5% 0603 4 3 C4, C10, C14 CAP X5R 0.1µF 16V 10% 0603 5 2 C5, C11 CAP NPO 47pF 16V 5% 0603 6 1 C6 CAP X7R 330pF 16V 0603 7 2 C7, C13 CAP X5R 0.01µF 16V 10% 0603 8 1 C8 CAP X5R 4.7µF 16V,10% 0805 9 2 C9, C18 CAP X5R 1µF 16V,10% 0603 10 4 CIN1, CIN2, CIN3, CIN4 CAP X5R 22µF 16V 1210 11 1 CIN6 CAP 180µF 16V SVP-F8 12 4 COUT1, COUT2, COUT6, COUT7 CAP X5R 100µF 6.3V 20% 1206 13 4 COUT4, COUT5, COUT9, COUT10 CAP 330µF 2.5V SIZE 7343 14 2 D1, D2 DIODE SCHOTTKY SOD-323 15 2 L1, L2 IND 0.47µH 0.8m DCR 16 2 Q1, Q2 MOSFET 5mm x 6mm POWER STAGE 17 2 R13, R45 RES 100k 1% 0603 18 6 R2, R11, R19, R44, R4, R12 RES 10k 1% 0603 19 1 R27 RES CHIP 11k 1% 0603 20 2 R29, R31 RES 2.2 1% 0603 21 1 R30 RES 133k 1% 0603 22 2 R32, R40 RES 15k 1% 0603 23 12 R5, R17, R21, R23, R25, R35, R38, R41, RES 0,0603 R42, R50, R14, R24 24 4 R6, R7, R46, R48 RES 10 1% 0603 25 2 RS1, RS2 RES 0.001 1W 1% 2512 26 1 U1 LTC3838EUHF-1 QFN 38-LEAD MANUFACTURER/PART NUMBER AVX 0603YC471JAT2A MURATA GRM21BR61C106KE15L AVX 06033A102JAT2A AVX 0603YD104KAT2A AVX,0603YA470JAT2A AVX 0603YC331JAT2A AVX 0603YD103KAT2A AVX 0805YD475KAT2A AVX 0603YD105KAT2A AVX 1210YD226MAT2A SANYO 16SVP180MX MURATA GRM31CR60J107ME39L SANYO 2R5TPE330M9 CENTRAL SEMI. CMDSH-4E TR WÜRTH 7443330047 INFINEON BSC0911ND VISHAY CRCW0603100KFKEA VISHAY CRCW060310K0FKEA VISHAY CRCW060311K0FKEA VISHAY CRCW06032R20FKEA VISHAY CRCW0603133KFKEA VISHAY CRCW060315K0FKEA VISHAY CRCW06030000Z0EA VISHAY CRCW060310R0FKED VISHAY WSL25121L000FEA LINEAR TECH. LTC3838EUHF-1 6 Downloaded from Arrow.com. dc1997a-af DEMO MANUAL DC1997A-A/DC1997A-B PARTS LISTDC1997A-A ITEM QTY REFERENCE Additional Circuit Components 1 0 C1, C2, C15, C17, C19, C23, C24 2 0 C20 3 0 CIN5 4 0 CIN7-CIN12 5 0 COUT3, COUT8, COUT11-COUT14 6 0 D3 7 0 E19, E20 8 0 JP5, JP6 9 2 Q11, Q12 10 0 Q3-Q10 11 0 R1, R3, R8, R9, R10, R15, R16, R18, R20, R22, R26, R28, R33, R34, R36, R37, R39, R43, R47, R49, R63 12 0 R51, R53, R54, R59, R60, R61, R62 13 0 R52 14 2 R55, R56 15 2 R57, R58 16 0 U2 Hardware 1 6 J1-J6 2 12 J1-J6 3 6 J1-J6 4 6 J1-J6 5 2 J7,J8 6 2 JP1, JP4 7 2 JP2, JP3 8 4 XJP1-XJP4 PART DESCRIPTION CAP 0603 CAP 0805 CAP SVP-F8 CAP OPT 1210 CAP OPT 7343 DIODE SOD-323 TESTPOINT TURRET 0.095" HEADER OPT 2MM SINGLE 3-PIN MOSFET N-CH 30V TO-252 MOSFET LFPAK RES 0603 RES 0603 RES POT-3313J-1 RES 10k 1% 0603 RES 0.005 1/2W 1% 2010 LT6650HS5 SOT23-5 STUD TEST PIN NUT BRASS #10-32 RING LUG #10 WASHER TIN PLATED BRASS CONN BNC 5 PINS HEADER 2MM SINGLE 3-PIN HEADER 2MM SINGLE 4-PIN SHUNT MANUFACTURER/PART NUMBER OPT OPT OPT OPT OPT OPT OPT OPT FAIRCHILD FDD8874 OPT OPT OPT OPT VISHAY CRCW060310K0FKEA VISHAY WSL20105L000FEA OPT PEM KFH-032-10 ANY KEYSTONE 8205 ANY CONNEX 112404 SAMTEC TMM-103-02-L-S SAMTEC TMM-104-02-L-S SAMTEC 2SN-BK-G Downloaded from Arrow.com. dc1997a-af 7 DEMO MANUAL DC1997A-A/DC1997A-B PARTS LISTDC1997A-B ITEM QTY REFERENCE PART DESCRIPTION Required Circuit Components 1 1 C12 CAP X7R 470pF 16V 5% 0603 2 2 C21, C22 CAP X5R 10µF 16V 10% 0805 3 2 C3, C16 CAP NPO 1000pF 25V 5% 0603 4 3 C4, C10, C14 CAP X5R 0.1µF 16V 10% 0603 5 2 C5, C11 CAP NPO 47pF 16V 5% 0603 6 1 C6 CAP NPO 680pF 16V 0603 7 1 C13 CAP X5R 0.01µF 16V 10% 0603 8 1 C7 CAP X7R 4.7nF 10V 0603 9 1 C8 CAP X5R 4.7µF 16V,10% 0805 10 2 C9, C18 CAP X5R 1µF 16V,10% 0603 11 4 CIN1, CIN2, CIN3, CIN4 CAP X5R 22µF 16V 1210 12 1 CIN6 CAP 180µF 16V SVP-F8 13 4 COUT1, COUT2, COUT6, COUT7 CAP X5R 100µF 6.3V 20% 1206 14 4 COUT4, COUT5, COUT9, COUT10 CAP 330µF 2.5V SIZE 7343 15 2 D1, D2 DIODE SCHOTTKY SOD-323 16 2 L1, L2 IND 0.47µH 0.8m DCR 17 2 Q1, Q2 MOSFET 5mm x 6mm POWER STAGE 18 3 R13, R24, R45 RES 100k 1% 0603 19 4 R2, R11, R19, R44 RES 10k 1% 0603 20 1 R27 RES CHIP 5.23k 1% 0603 21 2 R29, R31 RES 2.2 1% 0603 22 1 R30 RES 133k 1% 0603 23 2 R32, R40 RES 15k 1% 0603 24 13 R5, R17, R21, R23, R25, R35, R38, R41, RES 0, 0603 R42, R50, R59, R61, R62 25 4 R6, R7, R46, R48 RES 10 1% 0603 26 2 RS1, RS2 RES 0.001 1W 1% 2512 27 1 U1 LTC3838EUHF-2 QFN 38-LEAD MANUFACTURER/PART NUMBER AVX 0603YC471JAT2A MURATA GRM21BR61C106KE15L AVX 06033A102JAT2A AVX 0603YD104KAT2A AVX,0603YA470JAT2A AVX 0603YC681JAT2A AVX 0603YD103KAT2A AVX 0603ZC472JAT2A AVX 0805YD475KAT2A AVX 0603YD105KAT2A AVX 1210YD226MAT2A SANYO 16SVP180MX MURATA GRM31CR60J107ME39L SANYO 2R5TPE330M9 CENTRAL SEMI. CMDSH-4E TR WÜRTH 7443330047 INFINEON BSC0911ND VISHAY CRCW0603100KFKEA VISHAY CRCW060310K0FKEA VISHAY CRCW06035K23FKEA VISHAY CRCW06032R20FKEA VISHAY CRCW0603133KFKEA VISHAY CRCW060315K0FKEA VISHAY CRCW06030000Z0EA VISHAY CRCW060310R0FKED VISHAY WSL25121L000FEA LINEAR TECH. LTC3838EUHF-2 8 Downloaded from Arrow.com. dc1997a-af DEMO MANUAL DC1997A-A/DC1997A-B PARTS LISTDC1997A-B ITEM QTY REFERENCE Additional Circuit Components 1 0 C1, C2, C15, C17 2 1 C19 3 1 C20 4 1 C23 5 1 C24 6 0 CIN5 7 0 CIN7-CIN12 8 0 COUT3, COUT8, COUT11-COUT14 9 1 D3 10 2 Q11, Q12 11 0 Q3-Q10 (OPT) 12 0 R1, R3, R8, R9, R10, R15, R16, R18, R20, R22, R26, R28, R33, R34, R36, R37, R39, R43, R47, R49, R63 13 0 R4, R12, R14 14 1 R51 15 1 R52 16 1 R53 17 1 R54 18 2 R55, R56 19 2 R57, R58 20 1 R60 21 1 U2 Hardware 1 2 E19, E20 2 26 E1-E7, E9, E11-E28 3 6 J1-J6 4 6 J1-J6 5 6 J1-J6 6 12 J1-J6 7 2 J7, J8 8 2 JP1, JP4 9 2 JP2, JP3 10 2 JP5, JP6 11 1 XJP1-XJP4 12 1 XJP5,XJP6 PART DESCRIPTION CAP 0603 CAP X5R 1µF 16V 0603 CAP X5R 4.7µF 16V 0805 CAP X5R 1µF 16V 0603 CAP X5R 0.01µF 16V 0603 CAP SVP-F8 CAP OPT 1210 CAP OPT 7343 DIODE BZT52C5V6S 5.6V ZENER SOD-323 MOSFET N-CH 30V TO-252 MOSFET LFPAK RES 0603 RES 0603 RES CHIP 10k 1% 0603 RES POT 20k 1% POT-3313J-1 RES 20k 0.1% 0603 RES 10k 0.1% 0603 RES 10k 1% 0603 RES 0.005 1/2W 1% 2010 RES CHIP 6.65k 0.1% 0603 LT6650HS5 SOT23-5 TESTPOINT TURRET 0.095" TESTPOINT TURRET 0.095" STUD TEST PIN NUT BRASS #10-32 RING LUG #10 WASHER TIN PLATED BRASS CONN BNC 5 PINS HEADER 2MM SINGLE 3-PIN HEADER 2MM SINGLE 4-PIN HEADER 2MM SINGLE 3-PIN SHUNT SHUNT MANUFACTURER/PART NUMBER OPT AVX 0603YD105KAT2A AVX 0805YD475KAT2A AVX 0603YD105KAT2A AVX 0603YD103KAT2A OPT OPT OPT DIODES BZT52C5V6S-7-F FAIRCHILD FDD8874 OPT OPT OPT VISHAY CRCW060310K0FKEA BOURN 3313J-1-203E VISHAY PTN0603E2002BST1 VISHAY PTN0603E1002BSTS VISHAY CRCW060310K0FKEA VISHAY WSL20105L000FEA VISHAY PTN0603E6651BSTS LINEAR TECH. LT6650HS5 MILL-MAX 2501-2-00-80-00-00-07-0 MILL-MAX 2501-2-00-80-00-00-07-0 PEM KFH-032-10 ANY KEYSTONE 8205 ANY CONNEX 112404 SAMTEC TMM-103-02-L-S SAMTEC TMM-104-02-L-S SAMTEC TMM-103-02-L-S SAMTEC 2SN-BK-G SAMTEC 2SN-BK-G Downloaded from Arrow.com. dc1997a-af 9 DEMO MANUAL DC1997A-A/DC1997A-B SCHEMATIC DIAGRAM 10 Downloaded from Arrow.com. dc1997a-af SCHEMATIC DIAGRAM DEMO MANUAL DC1997A-A/DC1997A-B Downloaded from Arrow.com. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. dc1997a-af 11 DEMO MANUAL DC1997A-A/DC1997A-B DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com Downloaded from Arrow.com. dc1997a-af LT 0113 · PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2012