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TL499A-TL499ACP-TL499ACP.-TL499ACPSR
Wide-Range Power-Supply Controller
TL499A=50µH
SERIESIN1 REG IN2
RCL= 500Ω
OUTPUT= 470µF
RE1
RE2=4.7kΩ= 0.01µF
SERIES IN1 REG IN2
REF CURRENT
CTRL
OUTPUTIN
GND (PWR)
GND1
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TL499ASLVS029H–JANUARY 1984–REVISED NOVEMBER 2015
TL499A Wide-Range Power-Supply Controllers Features 3 DescriptionThe TL499A deviceis an integrated circuit designed Internal Series-Pass and Step-Up Switching to providea wide range of adjustable regulatedRegulator supply voltages. The regulated output voltage can be• Output Adjustable From 2.9Vto30V varied from 2.9Vto 30V by adjusting two external 1-Vto 10-V Inputfor Switching Regulator resistors. When the TL499Ais ac-coupledto line
power througha step-down transformer,it operates• 4.5-Vto 32-V Input for Series Regulator asa series DC voltage regulator to maintain the• Externally Controlled Switching Current regulated output voltage. With the addition ofa• No External Rectifier Required battery from 1.1V to 10 V, an inductor,a filter
capacitor, and two resistors, the TL499A operatesas
2 Applications a step-up switching regulator during an AC-line
failure. The adjustable regulated output voltage• Voltage Boosting makes the TL499A useful fora wide range of• Dual-Supply Voltage Reglation applications. Providing backup power during an AC-
line failure makes the TL499A extremely usefulin• Battery Back-Ups
microprocessor memory applications. The TL499AC• Microprocessor Memory Power is characterizedfor operation from –20°Cto +85°C.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application
