A8498 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - 8 to 50 V input range - Integrated DMOS switch - Adjustable fixed off-time - Highly efficient - Adjustable 0.8 to 24 V output PACKAGE: 8-Lead SOIC with Exposed Thermal Pad (suffix LJ) DESCRIPTION The A8498 is a step-down regulator that will handle a wide input operating voltage range. The A8498 is supplied in a low-profile 8-lead SOIC with exposed pad (package LJ). Applications include: - Applications with 8 to 50 V input voltage range needing buck regulator for 3.0 A output current - Consumer equipment power - Uninterruptible power supplies (lead acid battery charger) - Automotive telematics: 9 to 16 V input, with higher voltage protection - 12 V lighter-powered applications (portable DVD, etc.) - Point of Sale (POS) applications - Industrial applications with 24 or 36 V bus Approximate Footprint CBOOT 0.01 µF BOOT RTSET 63.4 kΩ TSET GND VBIAS FB D1 +42 V CIN2 220 µF 50 V CIN1 0.22 µF L1 68 µH R1 6.34 kΩ R2 2 kΩ VOUT 3.3 V / 3 A COUT 220 µF 25 V Efficiency % 90.0 88.0 86.0 84.0 82.0 80.0 78.0 76.0 74.0 72.0 70.0 Efficiency vs. Output Current VOUT (V) 5...