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A8498SLJTR-T
A8498 Wide Input Voltage 3.0 A Step Down Regulator FEATURES AND BENEFITS • • • • • DESCRIPTION 8 to 50 V input range Integrated DMOS switch Adjustable fixed off-time Highly efficient Adjustable 0.8 to 24 V output 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 Package: 8-Lead SOIC with Exposed Thermal Pad (suffix LJ) Approximate Scale 1:1 +42 V CBOOT 0.01 µF ENB TSET CIN2 220 µF 50 V VIN A8498 LX L1 68 µH VOUT 3.3 V / 3 A VBIAS RTSET 63.4 kΩ R1 6.34 kΩ GND CIN1 0.22 µF FB D1 R2 2 kΩ ESR COUT 220 µF 25 V Efficiency % BOOT Efficiency vs. Output Current 90.0 88.0 86.0 84.0 82.0 80.0 78.0 76.0 74.0 72.0 70.0 VOUT (V) 5 3.3 0 Typical Application 500 1000 1500 2000 2500 IOUT (mA) Circuit for 42 V step down to 3.3 V at 3 A. Efficiency data from circuit shown in left panel. Data is for reference only. A8498-DS, Rev. 7 3000
STM
STMicroelectronics NV
スイス
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