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A4490EESTR-T Datasheet(PDF) 2 Page - Allegro MicroSystems |
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A4490EESTR-T Datasheet(HTML) 2 Page - Allegro MicroSystems |
2 / 17 page Triple Output Step-Down Switching Regulator A4490 2 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com The A4490 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating. Applications include the following: ▪ Photo, inkjet, and portable printers ▪ Industrial ▪ Hand-held devices ▪Portable applications Description (continued) Selection Guide Part Number Packing Operating Temperature Range (°C) A4490EESTR-T 1500 pieces per 7-in. reel –40 to 85 Thermal Characteristics may require derating at maximum conditions, see application information Characteristic Symbol Test Conditions* Value Units Package Thermal Resistance RθJA On 4-layer PCB based on JEDEC standard 37 ºC/W *Additional thermal information available on the Allegro website. Absolute Maximum Ratings (reference to GND) Characteristic Symbol Notes Rating Units Load Supply Voltage VBB 36 V LX1, LX2, and LX3 Pins VLXn –1 to 36 V PORZ and VDD Pins VIN –0.3 to 7 V ENBx Pin Input Current IENBx Driven by a current-limited voltage source 1 mA Operating Ambient Temperature TA Range E –40 to 85 ºC Maximum Junction Temperature TJ(max) 150 ºC Storage Temperature Tstg –55 to 150 ºC Recommended Operating Conditions Characteristic Symbol Conditions Min. Typ. Max. Units Load Supply Voltage VBB To operate at VBB < 6 V, connect VDD supply to the VBB supply. See Powering Configurations section. 4.5 – 34 V LX1, LX2, and LX3 Pins VLXn –0.7 – 34 V Operating Ambient Temperature TA –40 – 85 ºC Junction Temperature TJ –40 – 125 ºC |
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