LP2981AIM5-3.3/NOPB National Semiconductor, LP2981AIM5-3.3/NOPB Datasheet

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... Precision Output. 0.75% tolerance output voltages avail- able (A grade). Nine voltage options, from 2.5V to 5.0V, are available as standard products. Block Diagram VIP ® registered trademark of National Semiconductor Corporation. © 2009 National Semiconductor Corporation Features ■ Ultra low dropout voltage ■ Output voltage accuracy 0.75% (A Grade) ■ ...

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Connection Diagram Pin Descriptions Pin Name Number GND 2 ON/OFF 3 N OUT www.national.com 5-Lead Small Outline Package (SOT-23) 1250602 Top View See NS Package Number MF05A Function Input Voltage Common Ground (device substrate) ...

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... L77B LP2981IM5-2.8 L77B LP2981AIM5X-3.0 L05A LP2981AIM5-3.0 L05A LP2981IM5X-3.0 L05B LP2981IM5-3.0 L05B LP2981AIM5X-3.2 L35A LP2981AIM5X-3.3 L04A LP2981AIM5-3.3 L04A LP2981IM5X-3.3 L04B LP2981IM5-3.3 L04B LP2981AIM5X-3.6 L0JA LP2981AIM5-3.6 L0JA LP2981IM5X-3.6 L0JB LP2981IM5-3.6 L0JB LP2981AIM5-3.8 L36A LP2981IM5-3.8 L36B LP2981AIM5X-5.0 L03A LP2981AIM5-5.0 L03A LP2981IM5X-5.0 L03B LP2981IM5-5.0 L03B 3 ...

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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Junction Temperature Range Lead Temperature (Soldering, 5 sec.) Electrical Characteristics Limits in standard typeface are for T otherwise specified 1V O(NOM) ...

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Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. Note 2: The ESD rating of pins 3 and 4 ...

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Typical Performance Characteristics = 4.7 μ μF all voltage options, ON/OFF pin tied OUT IN Output Voltage vs Temperature Output Voltage vs Temperature Dropout Characteristics www.national.com Unless otherwise specified Output Voltage ...

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Dropout Voltage vs Temperature 1250612 Ground Pin Current vs Temperature 1250614 Input Current   1250616 Dropout Voltage vs Load Current Ground Pin Current vs Load Current Input Current vs V   7 1250613 1250615 IN 1250617 www.national.com ...

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Line Transient Response   Load Transient Response   Load Transient Response   www.national.com Line Transient Response 1250618 Load Transient Response 1250620 Load Transient Response 1250622 8   1250619   1250621   1250623 ...

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Short Circuit Current   1250624 Short Circuit Current   1250626 Output Impedance vs Frequency 1250628 Instantaneous Short Circuit Current vs Temperature Instantaneous Short Circuit Current vs Output Voltage Ripple Rejection   9 1250625 1250627 1250629 www.national.com ...

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Output Noise Density   Input to Output Leakage vs Temperature Turn-On Waveform   www.national.com Output Impedance vs Frequency 1250630 Output Reverse Leakage vs Temperature 1250632 Turn-Off Waveform 1250634 10 1250631 1250633   1250635 ...

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ON/OFF Pin Current vs V ON/OFF 1250636 ON/OFF Threshold vs Temperature 11 1250637 www.national.com ...

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Application Hints EXTERNAL CAPACITORS Like any low-dropout regulator, the external capacitors used with the LP2981 must be carefully selected to assure regula- tor loop stability. Input Capacitor: An input capacitor whose value is is required with the LP2981 (amount of ...

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FIGURE 4. 3V/10 μF ESR Curves REVERSE CURRENT PATH The internal PNP power transistor used as the pass element in the LP2981 has an inherent diode connected between the regulator output and input. During normal operation (where the input voltage ...

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Physical Dimensions For Order Numbers, refer to Table 1 in the “Ordering Information” section of this document. www.national.com inches (millimeters) unless otherwise noted 5-Lead Small Outline Package (SOT-23) NS Package Number MF05A 14 ...

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Notes 15 www.national.com ...

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