DATASHEET ISL80121-5 FN7713 Rev 6.00 1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting March 21, 2016 The ISL80121-5 is a low dropout voltage, single output LDO Features with programmable current limiting. The ISL80121-5 operates 1.8% V accuracy guaranteed over line, load and from input voltages of 5V to 6V with a nominal output voltage OUT T = -40C to +125C of 5V. Other custom voltage options are available upon J request. Very low 130mV dropout voltage A submicron BiCMOS process is utilized for this product family High accuracy current limit programmable up to 1.75A to deliver the best in class analog performance and overall Very fast transient response value. The programmable current limiting improves system 210V output noise RMS reliability of end applications. An external capacitor on the soft-start pin provides an adjustable soft-starting ramp. The Power-good output ENABLE feature allows the part to be placed into a low Programmable soft-start quiescent current shutdown mode. Over-temperature protection This BiCMOS LDO will consume significantly lower quiescent Small 10 Ld DFN package current as a function of load compared to bipolar LDOs, which translates into higher efficiency and packages with smaller Applications footprints. Quiescent current is modestly compromised to achieve a very fast load transient response. USB devices Telecommunications and networking TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS Medical equipment PROGRAMMABLE I ADJ or FIXED LIMIT PART NUMBER I (DEFAULT) V LIMIT OUT Instrumentation systems ISL80101-ADJ No 1.75A ADJ Routers and switchers ISL80101 No 1.75A 1.8V, 2.5V, Gaming 3.3V, 5.0V ISL80101A Yes 1.62A ADJ ISL80121-5 Yes 0.75A 5.0V Typical Applications ISL80121-5 ISL80121-5 5.4V 10% 5.0V 5.4V 10% 5.0V V V IN OUT V IN V 10 OUT 1 10 1 V V IN OUT V V IN OUT C C IN 9 OUT C 2 9 2 C IN OUT V V V OUT R IN V OUT SENSE IN 10F 10F 10F 10F 10 8 3 SENSE 8 3 I SET I SENSE R SET PG 100k R SET R PG 10k 100k ON ON 7 4 7 4 OFF ENABLE PG OFF ENABLE PG 6 6 SS SS GND GND C SS 5 C SS 5 I = 0.75A 2.9 LIMIT I = 0.75 + ------------------------------ LIMIT R k SET (DEFAULT) FIGURE 1. FIGURE 2. FN7713 Rev 6.00 Page 1 of 12 March 21, 2016ISL80121-5 Block Diagram SS THERMAL SHUTDOWN V IN + - CURRENT V OUT LIMITER I SET PGOOD VOLTAGE POWER REFERENCE GOOD SENSE ENABLE GND Ordering Information PART NUMBER PART TEMP. RANGE PACKAGE PKG (Notes 1, 2, 3) MARKING V VOLTAGE (C) (RoHS Compliant) DWG. OUT ISL80121IR50Z DZAD 5.0V -40 to +125 10 Ld 3x3 DFN L10.3x3 ISL80121-5EVAL2Z Evaluation Board NOTES: 1. Add -T* suffix for tape and reel. Please 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), please see device information page for ISL80121-5. For more information on MSL, please see Technical Brief TB363. FN7713 Rev 6.00 Page 2 of 12 March 21, 2016