(China (Mainland))
Product Summary
The TL499A is a Wide-Range Power-Supply Controller 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.
Parametrics
TL499A absolute maximum ratings: (1)Output voltage, VO (see Note 1): 35 V; (2)Input voltage, series regulator, VI1: 35 V; (3)Input voltage, switching regulator, VI2 : 10 V; (4)Blocking-diode reverse voltage: 35 V; (5)Blocking-diode forward current: 1 A; (6)Power switch current (SW IN): 1 A; (7)Package thermal impedance, θJA (see Notes 2 and 3): P package 85°C/W PS package: 95°C/W; (8)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: 260°C; (9)Storage temperature range, Tstg: –65°C to 150°C.
Features
TL499A features: (1)Internal Series-Pass and Step-Up Switching Regulator; (2)Output Adjustable From 2.9 V to 30 V; (3)1-V to 10-V Input for Switching Regulator; (4)4.5-V to 32-V Input for Series Regulator; (5)Externally Controlled Switching Current; (6)No External Rectifier Required.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
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 TL499ACP |
Texas Instruments |
DC/DC Switching Regulators Wide Range |
Data Sheet |
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TL499ACPE4 |
Texas Instruments |
DC/DC Switching Regulators Wide-Range Power- Supply Controller |
Data Sheet |
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TL499ACPSR |
Texas Instruments |
DC/DC Switching Regulators Wide-Range Power- Supply Controller |
Data Sheet |
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TL499ACPSRE4 |
Texas Instruments |
DC/DC Switching Regulators Wide-Range Power- Supply Controller |
Data Sheet |
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TL499ACPSRG4 |
Texas Instruments |
DC/DC Switching Regulators Wide-Range Power Supply Controller |
Data Sheet |
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