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TL499A

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宽电压范围电源控制器

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LM5157 正在供货 采用双随机展频技术的 6A/4A、50V、2.2MHz 宽输入电压升压、反激式和 SEPIC 转换器 Lower quiescent current, wider voltage range

TL499A

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产品详情

Rating Catalog Topology Boost Vin (max) (V) 10 Vin (min) (V) 1.1 Vout (max) (V) 30 Vout (min) (V) 2.9 Features Nonsynchronous rectification Duty cycle (max) (%) 70 Iq (typ) (A) 0.0008 Operating temperature range (°C) -20 to 85
Rating Catalog Topology Boost Vin (max) (V) 10 Vin (min) (V) 1.1 Vout (max) (V) 30 Vout (min) (V) 2.9 Features Nonsynchronous rectification Duty cycle (max) (%) 70 Iq (typ) (A) 0.0008 Operating temperature range (°C) -20 to 85
SOP (PS) 8 48.36 mm² (6.2 mm × 7.8 mm) PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm)
  • Internal Series-Pass and Step-Up Switching
    Regulator
  • 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
  • Internal Series-Pass and Step-Up Switching
    Regulator
  • 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

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.

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.
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* 数据表 TL499A Wide-Range Power-Supply Controllers 数据表 (Rev. H) PDF | HTML 2015-11-30

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