DATASHEET ISL80505 FN8770 Rev 1.00 High Performance 500mA LDO November 10, 2016 The ISL80505 is a single output Low Dropout voltage regulator Features (LDO) capable of sourcing up to 500mA output current. This 1.8% V accuracy guaranteed over line, load, and LDO operates from input voltages of 1.8V to 6V. The output OUT T = -40C to +125C voltage of ISL80505 can be programmed from 0.8V to 5.5V. J Very low 45mV dropout voltage at V = 2.5V OUT A submicron BiCMOS process is utilized for this product family to deliver the best in class analog performance and overall Stable with a 4.7F output ceramic capacitor value. This CMOS LDO consumes significantly lower quiescent Very fast transient response current as a function of load compared to bipolar LDOs, which Programmable output soft-start time translates into higher efficiency and packages with smaller footprints. Excellent PSRR over wide frequency range Current limit protection State-of-the-art internal compensation achieves a very fast load transient response and excellent PSRR. The ISL80505 Thermal shutdown function provides an output accuracy of 1.8% V accuracy over all OUT Available in an 8 Ld DFN package load, line and temperature variations (T = -40C to +125C). J An external capacitor on the soft-start pin provides an Pb-free (RoHS compliant) adjustable soft starting of the output voltage ramp to control the inrush current. The ENABLE feature allows the part to be Applications placed into a low quiescent current shutdown mode. Noise sensitive instrumentation systems Table 1 shows the differences between the ISL80505 and Post regulation of switched mode power supplies others in its family. Industrial systems TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS Medical equipment PART NUMBER INPUT VOLTAGE RANGE MAX OUTPUT CURRENT Telecommunications and networking equipment ISL80510 2.2V to 6V 1.0A Servers ISL80505 1.8V to 6V 0.5A Hard disk drives (HD/HDD) Related Literature For a full list of related documents, visit our website - ISL80505 product page 80 I = 0.1A OUT 70 ISL80505 I = 0.3A OUT V V IN V V OUT IN OUT 60 8 1 V V IN OUT 50 C C IN R OUT 7 2 1 EPAD FB SS 40 C 6 PB 3 I = 0.5A OUT (OPTIONAL) ENABLE GND V = 2.3V IN C 30 SS 5 4 V = 1.8V OUT C = 10F R 20 OUT 2 C = 2.7nF PB 10 R = 10k 1 R = 3.83k 2 0 100 1k 10k 100k 1M FREQUENCY (Hz) FIGURE 1. TYPICAL APPLICATION CIRCUIT FIGURE 2. PSRR FN8770 Rev 1.00 Page 1 of 13 November 10, 2016 PSRR (dB)ISL80505 Block Diagram V IN REFERENCE + FET DRIVER -- SOFT-START WITH CURRENT EAEA ++ LIMIT CONTROL THERMAL ENABLE LOGIC SENSOR V OUT SS FB GND FIGURE 3. BLOCK DIAGRAM Ordering Information PART NUMBER PART TEMP RANGE PACKAGE PKG (Notes 1, 2, 3) MARKING (C) (RoHS Compliant) DWG. ISL80505IRAJZ 0505 -40 to +125 8 Ld 3x3 DFN L8.3X3J ISL80510EVAL1Z Evaluation Board NOTES: 1. Add -T suffix for 6k unit or -T7A suffix for 250 unit tape and reel options. Refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), see device information page for ISL80505. For more information on MSL see Technical Brief TB363. FN8770 Rev 1.00 Page 2 of 13 November 10, 2016