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LM3280TL/NOPB Datasheet(PDF) 6 Page - Texas Instruments |
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LM3280TL/NOPB Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 27 page  LM3280 SNOSAU4B – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com LDO1, 2, and 3 Electrical Characteristics (1)(2) (continued) Limits in standard typeface are for TA = TJ = 25°C. Limits in boldface type apply over the full operating ambient temperature range ( −30°C ≤ TA = TJ ≤ +85°C). Unless otherwise noted, specifications apply to the LM3280 with: VIN = 3.6V, ENBUCK = 3.6V, BYP = 0V, FB = 2V, VCON = 0.267V, ENLDOx = 3.6V (3). Symbol Parameter Conditions Min Typ Max Units ILIM_LDO LDO Current Limit (4) 30 40 55 mA IPU Pull-Up Current (4) 40 60 80 mA RPD Pull-Down Resistance IOUT = -50mA, 10 13.5 17 Ω ENBUCK = all ENLDO = 0V VDROP Dropout Voltage IOUT = 20mA (5) 70 115 mV (4) The current is defined as the load current at which the LDOx voltage is 1.0V lower than the nominal output voltage. (5) Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100mV below the nominal voltage. LDO1, 2, and 3 System Characteristics (1) The following spec table entries are guaranteed by design if the component values in the typical application circuit are used. Unless otherwise noted, specifications apply to the LM3280 with: VIN = 3.6V. These parameters are not guaranteed by production testing. Symbol Parameter Conditions Min Typ Max Units PSRR Power Supply Ripple Rejection Test Freq. = 1KHz, VRIPPLE = 0.5Vpp 55 dB Ratio COUT = 1µF, IOUT = 1mA, BYP = VIN TLDO_ON Time to reach 90% of VLDO(nom) VIN = ENBUCK = 3V, 50 100 µs after ENLDO signal goes high. COUT = 1µF, ENLDOx = Low to High, RLOAD = 270Ω VIN = 3V, 80 130 µs COUT = 1µF, ENBUCK = ENLDOx = Low to High, RLOAD = 270Ω TLDO_OFF Time to reach 0.1V of VLDO after VIN = 3V, 50 200 µs ENLDO signal goes low. COUT = 1µF, ENLDOx = High to Low, IOUT = 0mA (1) All voltages are with respect to the potential at the GND pins. 6 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LM3280 |
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