Application Note 1784 ISL80136EVAL1Z, ISL80138EVAL1Z Evaluation Boards User Guide Description Features The ISL80136EVAL1Z and ISL80138EVAL1Z evaluation boards are designed to demo the performance of these high voltage linear regulators. The evaluation boards are available with jumpers to set output voltage from 2.5V to 12V for easy evaluation by configuring a single resistor. The evaluation boards can also be configured to give a specific output voltage. • Wide VIN range of 6V to 40V • Adjustable output voltage from 2.5V to 12V • IOUT is 50mA for ISL80136 and 150mA for ISL80138 • Ultra low 18μA typical quiescent current • ±1% accurate voltage reference • Overcurrent protection Specification These boards have been configured and optimized for the following operating conditions: • VIN = 6V to 40V • Over-temperature/thermal protection References ISL80136 Datasheet • VOUT = 2.5V to 12V ISL80138 Datasheet • IOUT maximum is 50mA for ISL80136 and 150mA for ISL80138. • Selectable output by setting jumper pins JP2 through JP8. • JP1 uses for setting custom output voltage. Ordering Information PART NUMBER DESCRITION ISL80136EVAL1Z 40V Linear Regulator, 50mA Evaluation Board ISL80138EVAL1Z 40V Linear Regulator, 150mA Evaluation Board FIGURE 1. ISL80138EVAL1Z EVALUATION BOARD May 19, 2015 AN1784.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. Application Note 1784 Test Steps 1. Place jumper in proper location to set output voltage. OUT IN 2. Set jumper JP9 shorting pins 1 and 2 to enable device. CIN 3. Connect supply +6V to +40V to VIN and GND terminals. EN ADJ 4. Connect VOUT to load or multimeter to evaluate output. GND The ISL80136EVAL1Z and ISL80138EVAL1Z provide a simple platform to evaluate performance of ISL80136 and ISL80138. The ISL80136 and ISL80138 are high input voltage, low quiescent current linear regulators. The ISL80136 can output up to 50mA while the ISL80138 can provide 150mA current with only 18µA typical quiescent current. Both regulators feature a wide input voltage range of 6V to 40V. The output voltage is adjustable from 2.5V to 12V through a feedback resistor divider. The ISL80136 and ISL80138 are ideal for applications that need the load to operate under “always-on” or “stay alive” conditions of a high input voltage or under load dump conditions where the system voltage may peak much higher than normal. In addition, the low dropout performance and high PSRR make these regulators a good choice as a post regulator for a noisy voltage bus. The ISL80136EVAL1Z and ISL80138EVAL1Z evaluation boards are setup so that the user can easily configure the device for a specific output voltage with a single jumper. Jumper pins JP4 through JP7 will set the output voltage through a discrete range of 2.5V to 12V. When jumper JP1 is set, the user must populate R1 with a resistor to get a custom output voltage. The regulator uses a voltage divider to set the feedback reference for setting output voltage. The voltage at the output of the linear regulator when setting a custom output voltage is defined by Equation 1. R9 is set on the evaluation board at 15kΩ. Rearranging for R1 yields Equation 2. FIGURE 2. OUTPUT VOLTAGE SETTING EVALUATION BOARD OUTPUT VOLTAGE VOUT (V) RSET JUMPER SETTING 2.5 14kΩ JP4 3.3 8.66kΩ JP5 5 4.75kΩ JP6 12 1.65kΩ JP7 CUSTOM R1 = 18.3kΩ/(VOUT - 1.223) JP1 PCB Layout Guidelines A good PCB layout is important to achieve expected performance. Consideration should be taken when placing the components and routing the trace to minimize the ground impedance, and keep the parasitic inductance low. The input and output capacitors should have a good ground connection and be placed as close to the IC as possible. The ADJ feedback trace should be away from other noisy traces. Connect the exposed pad to the ground plane using as many vias as possible within the pad for the best thermal relief. (EQ. 1) 18.3k R 1 = ------------------------------------V OUT – 1.223 Submit Document Feedback COUT R1 Functional Description R V OUT = 1.223V ------9- + 1 R 1 R9 15k (EQ. 2) 2 AN1784.0 May 19, 2015 Application Note 1784 ISL80136EVAL1Z Schematic VIN TP1 4 JP9 GND 9 ADJ NC NC EN GND TP3 7 6 5 10UF NC 8 C5 3 TP2 OUT DNP 2 VOUT IN C4 10K R10 DNP C2 10UF C1 U1 1 TP4 EP GND 47PF C3 R9 15K ISL80136FBECZ 15V R8 1.3K JP8 1.65K JP7 12V R7 JP6 5V R6 4.75K JP5 R5 8.66K 3.3V 14K JP4 R4 2.5V 1.8V R3 30.1K JP3 JP2 R2 60.4K 1.5V R1 DNP JP1 VADJ FIGURE 3. ISL80136EVAL1Z SCHEMATIC ISL80138EVAL1Z Schematic VIN U1 TP2 GND JP9 VOUT 14 2 IN NC 13 3 NC ADJ 4 NC NC 11 5 NC NC 10 6 NC NC 9 7 EN GND 8 15 EP TP3 12 10UF OUT C5 NC DNP 1 C4 10K R10 DNP C2 C1 10UF TP1 TP4 GND C3 R8 47PF 15K 1.65K R9 ISL80138IVEAJZ 1.3K JP8 15V R7 JP7 12V 4.75K R6 JP6 5V JP5 R5 8.66K 3.3V 2.5V 14K JP4 R4 30.1K R3 JP3 1.8V JP2 R2 60.4K 1.5V DNP R1 JP1 VADJ FIGURE 4. ISL80138EVAL1Z SCHEMATIC Submit Document Feedback 3 AN1784.0 May 19, 2015 Submit Document Feedback Bill of Materials PART NUMBER REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER MANUFACTURER PART 4 UNITS H1045-00470-50V5-T 1 ea. C3 CAP, SMD, 0603, 47pF, 50V, 5%, C0G, NP0, ROHS AVX 06035A470JAT2A H1065-00106-50V10-T 4 ea. C1, C2, C4, C5 CAP, SMD, 1206, 10µF, 50V, 10%, X5R, ROHS TDK C3216X5R1H106K 1514-2 4 ea. TP1, TP2, TP3, TP4 CONN-TURRET, TERMINAL POST, TH, ROHS KEYSTONE 1514-2 68000-236HLF-1X3 1 ea. JP9 CONN-HEADER, 1x3, BREAKAWY 1X36, 2.54mm, ROHS BERG/FCI 68000-236HLF 69190-202HLF 8 ea. JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8 CONN-HEADER, 1X2, RETENTIVE, 2.54mm, 0.230X 0.120, ROHS BERG/FCI 69190-202HLF SPC02SYAN 2 ea. JP6, JP9-Pins 1 and 2 CONN-JUMPER, SHORTING, 2PIN, BLACK, GOLD, ROHS SULLINS SPC02SYAN ISL80136IBEAJZ 1 ea. U1 IC-40V LDO ADJ. LINEAR REGULATOR, 8P, EPSOIC, ROHS INTERSIL ISL80136IBEAJZ ISL80138IVEAJZ 1 ea. U1 IC-40V LDO ADJ. LINEAR REGULATOR, 14P, HTSSOP, ROHS INTERSIL ISL80138IVEAJZ H2511-01002-1/10W1-T 1 ea. R10 RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS KOA RK73H1JT1002F H2511-01301-1/10W1-T 1 ea. R8 RES, SMD, 0603, 1.3k, 1/10W, 1%, TF, ROHS VISHAY/DALE CRCW06031K30FKTA H2511-01402-1/10W1-T 1 ea. R4 RES, SMD, 0603, 14k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-1402FT H2511-01502-1/10W1-T 1 ea. R9 RES, SMD, 0603, 15k, 1/10W, 1%, TF, ROHS PANASONIC ERJ-3EKF1502V H2511-01651-1/10W1-T 1 ea. R7 RES, SMD, 0603, 1.65k, 1/10W, 1%, TF, ROHS PANASONIC ERJ-3EKF1651V H2511-03012-1/10W1-T 1 ea. R3 RES, SMD, 0603, 30.1k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-3012FT H2511-04751-1/10W1-T 1 ea. R6 RES, SMD, 0603, 4.75k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-4751FT H2511-06042-1/10W1-T 1 ea. R2 RES, SMD, 0603, 60.4k, 1/10W, 1%, TF, ROHS YAGEO RC0603FR-0760K4L H2511-08661-1/10W1-T 1 ea. R5 RES, SMD, 0603, 8.66k, 1/10W, 1%, TF, ROHS PANASONIC ERJ-3EKF8661V H2511-DNP 0 ea. R1 RES, SMD, 0603, DNP-PLACE HOLDER, ROHS Application Note 1784 QTY AN1784.0 May 19, 2015 Application Note 1784 Board Layouts FIGURE 5. ISL80136EVAL1Z SILKSCREEN TOP FIGURE 6. ISL80138EVAL1Z SILKSCREEN TOP FIGURE 7. ISL80136EVAL1Z TOP FIGURE 8. ISL80136EVAL1Z BOTTOM FIGURE 9. ISL80138EVAL1Z TOP FIGURE 10. ISL80138EVAL1Z BOTTOM Submit Document Feedback 5 AN1784.0 May 19, 2015 Application Note 1784 5.100 90 5.075 80 +125°C +25°C 5.000 -40°C 4.975 IOUT = 0A 60 5.025 IOUT = 25mA 50 40 30 4.950 IOUT = 50mA 20 4.925 4.900 VOUT = 5V 70 5.050 PSRR (dB) OUTPUT VOLTAGE (V) Typical Performance Curves 10 0 10 20 30 40 0 50 100 1k 1M FIGURE 12. ISL80136 PSRR vs FREQUENCY FOR VARIOUS LOAD CURRENT, VOUT = 5V FIGURE 11. ISL80136 OUTPUT VOLTAGE VS LOAD CURRENT 5.20 70 5.15 60 5.10 VOUT = 3.3V 50 +125°C 5.05 +25°C PSRR (dB) OUTPUT VOLTAGE (V) 100k FREQUENCY (Hz) LOAD CURRENT (mA) 5.00 4.95 -40°C 40 VOUT = 5V 30 20 4.90 10 4.85 4.80 10k 0 50 100 LOAD CURRENT (mA) FIGURE 13. ISL80138 OUTPUT VOLTAGE vs LOAD CURRENT 150 0 100 1k 10k FREQUENCY (Hz) 100k 1M FIGURE 14. ISL80138 PSRR VS FREQUENCY FOR VARIOUS OUTPUT VOLTAGES, (LOAD = 150MA) Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the document is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com Submit Document Feedback 6 AN1784.0 May 19, 2015