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LP3962ESX-2.5 Datasheet(PDF) 8 Page - National Semiconductor (TI) |
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LP3962ESX-2.5 Datasheet(HTML) 8 Page - National Semiconductor (TI) |
8 / 22 page Electrical Characteristics LP3962/LP3965 (Continued) 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, IL = 10 mA, COUT = 33µF, VSD =VIN-0.3V. Symbol Parameter Conditions Typ (Note 4) LP3962/5 (Note 5) Units Min Max T dOFF Turn-off delay I L = 1.5 A 20 µs T dON Turn-on delay I L = 1.5 A 25 µs I SD SD Input Current V SD =VIN 1nA ERROR FLAG COMPARATOR V T Threshold (Note 9) 10 516 % V TH Threshold Hysteresis (Note 9) 5 28 % V EF(Sat) Error Flag Saturation I sink = 100µA 0.02 0.1 V Td Flag Reset Delay 1 µs I lk Error Flag Pin Leakage Current 1nA I max Error Flag Pin Sink Current V Error = 0.5V (over temp.) 1 mA AC PARAMETERS PSRR Ripple Rejection V IN =VOUT + 1.5V C OUT = 100uF V OUT = 3.3V 60 dB V IN =VOUT + 0.3V C OUT = 100uF V OUT = 3.3V 40 ρ n(l/f Output Noise Density f = 120Hz 0.8 µV e n Output Noise Voltage (rms) BW = 10Hz – 100kHz 150 µV (rms) BW = 300Hz – 300kHz 100 Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is intended to be functional, but does not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Charateristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2: At elevated temperatures, devices must be derated based on package thermal resistance. The devices in TO220 package must be derated at θjA = 50˚C/W (with 0.5in2, 1oz. copper area), junction-to-ambient (with no heat sink). The devices in the TO263 surface-mount package must be derated at θjA = 60˚C/W (with 0.5in2, 1oz. copper area), junction-to-ambient. The devices in SOT223 package must be derated at θjA = 90˚C/W (with 0.5in2, 1oz. copper area), junction-to-ambient. Note 3: The human body model is a 100pF capacitor discharged through a 1.5k Ω resistor into each pin. Note 4: Typical numbers are at 25˚C and represent the most likely parametric norm. Note 5: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL). Note 6: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP396X output must be diode-clamped to ground. Note 7: The output PMOS structure contains a diode between the VIN and VOUT terminals. This diode is normally reverse biased. This diode will get forward biased if the voltage at the output terminal is forced to be higher than the voltage at the input terminal. This diode can typically withstand 200mA of DC current and 1Amp of peak current. Note 8: Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage. Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the output voltage tolerance specification. Note 9: Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. Note 10: Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is nothing but the input to output differential, since the minimum input voltage is 2.5V. Note 11: This specification has been tested for −40˚C ≤ TJ ≤ 85˚C since the temperature rise of the device is negligible under shutdown conditions. Note 12: The minimum operating value for VIN is equal to either [VOUT(NOM) +VDROPOUT] or 2.5V, whichever is greater. www.national.com 8 |
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