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LP3892ET-1.2 Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LP3892ET-1.2 Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 12 page Electrical Characteristics Limits in standard typeface are for T J = 25˚C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: V IN =VO(NOM) + 1V, VBIAS = 4.5V, IL = 10 mA, CIN = COUT = 10µF, VS/D =VBIAS. (Continued) Symbol Parameter Conditions Typical (Note 4) MIN (Note 5) MAX (Note 5) Units AC Parameters PSRR (V IN) Ripple Rejection for V IN Input Voltage V IN =VOUT +1V, f = 120 Hz 80 dB V IN =VOUT +1V,f=1kHz 65 PSRR (V BIAS) Ripple Rejection for V BIAS Voltage V BIAS =VOUT + 3V, f = 120 Hz 70 V BIAS =VOUT +3V,f=1kHz 65 Output Noise Density f = 120 Hz 1 µV/root−Hz e n Output Noise Voltage BW = 10 Hz − 100 kHz, V OUT = 1.8V 150 µV (rms) BW = 300 Hz − 300 kHz, V OUT = 1.8V 90 Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Operating ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics. Specifications do not apply when operating the device outside of its rated operating conditions. Note 2: At elevated temperatures, device power dissipation must be derated based on package thermal resistance and heatsink thermal values. θJ-A for TO-220 devices is 65˚C/W if no heatsink is used. If the TO-220 device is attached to a heatsink, a θJ-S value of 4˚C/W can be assumed. θJ-A for TO-263 devices is approximately 40˚C/W if soldered down to a copper plane which is at least 1.5 square inches in area. If power dissipation causes the junction temperature to exceed specified limits, the device will go into thermal shutdown. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Note 4: Typical numbers represent the most likely parametric norm for 25˚C operation. Note 5: Limits are guaranteed through testing, statistical correlation, or design. Note 6: If used in a dual-supply system where the regulator load is returned to a negative supply, the output pin must be diode clamped to ground. Note 7: Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage. Note 8: Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load to full load. Note 9: Dropout voltage is defined as the minimum input to output differential required to maintain the output with 2% of nominal value. Note 10: The machine model is a 220 pF capacitor discharged directly into each pin. The machine model ESD rating of pin 5 is 100V. www.national.com 4 |
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