DATASHEET ISL8018 FN7889 Rev 0.00 8A Low Quiescent Current High Efficiency Synchronous Buck Regulator September 30, 2015 The ISL8018 is a high efficiency, monolithic, synchronous Features step-down DC/DC converter that can deliver up to 8A High efficiency synchronous buck regulator with up to 97% continuous output current from a 2.7V to 5.5V input supply. efficiency The output voltage is adjustable from 0.6V to V . With an IN adjustable current limit, reverse current protection, prebias 10% output voltage margining start and over-temperature protection, the ISL8018 offers a Adjustable current limit highly robust power solution. It uses current control Start-up with prebiased output architecture to deliver fast transient response and excellent loop stability. Internal soft-start - 1ms or adjustable, internal/external compensation The ISL8018 integrates a pair of low ON-resistance P-channel and N-channel internal MOSFETs to maximize efficiency and Soft-stop output discharge during disabled minimize external component count. 100% duty-cycle Adjustable frequency from 500kHz to 4MHz - default at operation allows less than 250mV dropout at 8A output 1MHz current. Adjustable frequency and synchronization allow the External synchronization up to 4MHz - master to slave phase ISL8018 to be used in applications requiring low noise. shifting capability The ISL8018 can be configured for discontinuous or forced Peak current limiting, hiccup mode short-circuit protection continuous operation at light load. Forced continuous operation and over-temperature protection reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light Applications loads. DC/DC POL modules The ISL8018 is offered in a space saving 20 Ld 3x4 QFN lead C/P, FPGA and DSP power free package with exposed pad lead frames for excellent thermal performance. The complete converter occupies less Plug-in DC/DC modules for routers and switchers 2 than 96.8mm area. Portable instruments See Ordering Information on page 2 for more detail. Test and measurement systems 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 FN7889 Rev 0.00 Page 1 of 21 September 30, 2015 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 FN7889 Rev 0.00 Page 2 of 21 September 30, 2015 VIN PGND PG PGND SYNCOUT SGND SYNCIN VFB