V Possible Hi? In addition, this device offers a very low ground current of ? A at mA output. When disabled power consumption drop to nearly zero.

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In addition, this device offers a very low ground current of ? A at mA output. When disabled, power consumption drops to nearly zero. Other key features include reverse battery protection, current limit, and thermal shutdown.

The SPX includes a reference bypass pin for optimal low noise output performance. With its very low output temperature coefficient, this device also makes a superior low power voltage reference. The SPX is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. It is available in several fixed output voltage options or with an adjustable output voltage.

Portable Consumer Equipment? Portable Instrumentation? Industrial Equipment? Low Noise: 40? V Possible? Reverse Battery Protection? Low Dropout: mV at Full Load? Low Quiescent Current: 90? Zero Off-Mode Current? Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

VIN, EN Internally Limited Lead Temperature Soldering, 5 sec Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. A Max. Units mA? CMOS compatible control input. Feedback input. A Load Fig. Its value depends upon the application circuit. In general, linear regulator stability decreases with higher output currents.

In applications where the SPX is sourcing less current, a lower output capacitance may be sufficient. For example, a regulator outputting only 10mA, requires approximately half the capacitance as the same regulator sourcing mA.

Bench testing is the best method for determining the proper type and value of the capacitor since the high frequency characteristics of electrolytic capacitors vary widely, depending on type and manufacturer. A high quality 2. F aluminum electrolytic capacitor works in most application circuits,? F tantalum electrolytic. With the SPX adjustable version, the minimum value of output capacitance is a function of the output voltage.

The value decreases with higher output voltages, since closed loop gain is increased. Applications requiring a slow rampup of the output voltage should use a larger CBYP. However, if a rapid turn-on is necessary, the BYP capacitor can be omitted.

Figure 18 represents a SPX standard application circuit. Two resistors R1 and R2 set the output voltage. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement.

While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, writing, assurances to its satisfaction that: a the risk of injury or damage has been minimized; b the user assumes such risks; c potential liability of EXAR Corporation is adequately protected under the circumstances.










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