L6984, L6986 Energy saving synchronous DC-DC converters for industrial Up to 2 A and up to 38 V input voltage range synchronous step down with extremely low quiescent current ST’s L6984 and L6986, are perfect solutions for industrial applications. These devices are able to provide up to 2 A of continuous output current and with a wide input voltage range from 4 V up to 38 V, accordingly to the part number chosen. High flexibility is given by several adjustable parameters, like output voltage, switching frequency and synchronization capability. Moreover the extreme low operating quiescent current makes these devices suitable for energy saving and low power consumption stand-by applications. KEY FEATURES • High switching frequency up to 2 MHz KEY APPLICATIONS • Wide input voltage range up to 38 V • Industrial application • Very low operating quiescent current 30 uA • Factory automation • Synchronous rectification • Building automation • Full embedded protection • PLCs • 12 V bus applications KEY BENEFITS • High efficiency at full and light load • High robustness and reliability • High design flexibility • Low BOM cost • Power saving www.st.com BLOCK DIAGRAM Digital I/O Power supply line 12 V - 24 V Vin Sensors L6984 L6986 Analog output modules 1.. Analog output modules # DEVICE SUMMARY Part Number L6984 L6984A(*) L6986 DFN4x4 10L DFN3x3 10L HTSSOP 16 Input voltage range (V) 4.5 to 36 4.5 to 36 4 to 38 Output current max (A) 0.35 0.35 2 Operating quiescent current max (µA) 100 100 30 High side RDSON (W) 1.26 1.26 0.18 Low side RDSON (W) 0.77 0.77 0.11 3.3 fixed 0.9 to 95% VIN adjustable 3.3 fixed 0.9 to 95% VIN adjustable 0.85 to VIN 200 to 600 200 to 600 250 to 2000 External synchronization frequency (kHz) N.A. N.A. Up to 2000 Low noise/low consumption selection mode Yes Yes Yes Enable pin, PGood Enable pin, PGood Enable pin, Adjustable soft start and reset -40, 150 -40, 150 -40, 150 Package Output voltage range (V) Switching frequency (kHz) Additional features Operating junction temperature (Tj °C) (*) Coming soon © STMicroelectronics - April 2014 - Printed in United Kingdom - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies All other names are the property of their respective owners Order code: FLL698x0414 For more information on ST products and solutions, visit www.st.com