text.skipToContent text.skipToNavigation


Wide-Range Power-Supply Controller


Package | PIN: P | 8
Temp: S (-20 to 85)
Carrier: Partial Tube
Qty Price
1-9 $2.47
10-24 $2.21
25-99 $2.05
100-249 $1.79
250-499 $1.65
500-749 $1.39
750-999 $1.14
1000+ $1.04


  • Internal Series-Pass and Step-Up Switching
  • Output Adjustable From 2.9 V to 30 V
  • 1-V to 10-V Input for Switching Regulator
  • 4.5-V to 32-V Input for Series Regulator
  • Externally Controlled Switching Current
  • No External Rectifier Required

Texas Instruments  TL499ACP

The TL499A device 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.