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TL499AY Datasheet(PDF) 1 Page - Texas Instruments |
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TL499AY Datasheet(HTML) 1 Page - Texas Instruments |
1 / 8 page TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029F – JANUARY 1984 – REVISED MAY 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Internal Series-Pass and Step-Up Switching Regulator D Output Adjustable From 2.9 V to 30 V D 1-V to 10-V Input for Switching Regulator D 4.5-V to 32-V Input for Series Regulator D Externally Controlled Switching Current D No External Rectifier Required description The TL499A is an integrated circuit designed to provide a wide range of adjustable regulated supply voltages. The regulated output voltage can be varied from 2.9 V to 30 V by adjusting two external resistors. When the TL499A is ac-coupled to line power through a step-down transformer, it operates as a series dc voltage regulator to maintain the regulated output voltage. With the addition of a battery from 1.1 V to 10 V, an inductor, a filter capacitor, and two resistors, the TL499A operates as a step-up switching regulator during an ac-line failure. The adjustable regulated output voltage makes the TL499A useful for a wide range of applications. Providing backup power during an ac-line failure makes the TL499A extremely useful in microprocessor memory applications. The TL499AC is characterized for operation from –20 °C to 85°C. AVAILABLE OPTIONS TA PLASTIC DIP (P) PLASTIC SMALL-OUTLINE (PS) CHIP FORM (Y) –20 °C to 85°C TL499ACP TL499ACPS TL499AY The PS package is available taped and reeled. Add the suffix R to device type (e.g., TL499ACPSR). Chip forms are tested at 25 °C. Copyright © 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 8 7 6 5 SERIES IN1 REF SW REG IN2 SW CURRENT CTRL OUTPUT GND (PWR) SW IN GND P OR PS PACKAGE (TOP VIEW) |
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