DATASHEET 8A Low Quiescent Current High Efficiency Synchronous Buck Regulator ISL8018 Features The ISL8018 is a high efficiency, monolithic, synchronous High efficiency synchronous buck regulator with up to 97% step-down DC/DC converter that can deliver up to 8A continuous efficiency output current from a 2.7V to 5.5V input supply. The output 10% output voltage margining voltage is adjustable from 0.6V to V . With an adjustable current IN Adjustable current limit limit, reverse current protection, prebias start and over-temperature protection, the ISL8018 offers a highly robust Start-up with prebiased output power solution. It uses current control architecture to deliver fast Internal soft-start - 1ms or adjustable, internal/external transient response and excellent loop stability. compensation The ISL8018 integrates a pair of low ON-resistance P-channel Soft-stop output discharge during disabled and N-channel internal MOSFETs to maximize efficiency and Adjustable frequency from 500kHz to 4MHz - default at 1MHz minimize external component count. 100% duty-cycle operation allows less than 250mV dropout at 8A output current. Adjustable External synchronization up to 4MHz - master to slave phase frequency and synchronization allow the ISL8018 to be used in shifting capability applications requiring low noise. Peak current limiting, hiccup mode short-circuit protection and over-temperature protection The ISL8018 can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation Applications reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads. DC/DC POL modules The ISL8018 is offered in a space saving 20 Ld 3x4 QFN lead free C/P, FPGA and DSP power package with exposed pad lead frames for excellent thermal Plug-in DC/DC modules for routers and switchers performance. The complete converter occupies less than 2 Portable instruments 96.8mm area. Test and measurement systems See Ordering Information on page 2 for more detail. Li-ion battery powered devices Related Literature UG052 ISL8018DEMO1Z Demonstration Board User Guide UG053 ISL8018EVAL3Z Evaluation Board User Guide 100 95 3.3V PFM OUT 90 3.3V PWM OUT 85 80 75 70 0 1 2 34567 8 I (A) OUT FIGURE 1. EFFICIENCY T = +25C V = 5V IN September 30, 2015 CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Copyright Intersil Americas LLC 2015. All Rights Reserved FN7889.0 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. EFFICIENCY (%) ISL8018 Ordering Information PART NUMBER OUTPUT VOLTAGE TEMP. RANGE PACKAGE PKG. (Notes 1, 2, 3)PART MARKING (V) (C) (RoHS Compliant) DWG. ISL8018IRAJZ 018A Adjustable -40 to +85 20 Ld 3x4 QFN L20.3x4 ISL8018EVAL3Z Evaluation Board ISL8018DEMO1Z Demonstration Board NOTES: 1. Add -T suffix for 6k units or -T7A suffix for 250 units Tape and Reel options. 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 ISL8018. For more information on MSL please see techbrief TB363. Pin Configuration ISL8018 (20 LD QFN) TOP VIEW 20 19 18 17 1 COMP PGND 16 2 15 SS PHASE ISET PHASE 3 14 PAD VSET PHASE 4 13 VIN 5 FS 12 VIN 11 EN 6 7 8 9 10 Submit Document Feedback FN7889.0 2 September 30, 2015 VIN PGND PG PGND SYNCOUT SGND SYNCIN VFB