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LM3686 Datasheet(PDF) 8 Page - Texas Instruments |
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LM3686 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 28 page LM3686 SNVS520D – AUGUST 2008 – REVISED MARCH 2011 www.ti.com Electrical Characteristics (1) (2) (3) (4) Linear Regulator — LDO Typical Limit Symbol Parameter Conditions Units Min Typ Max VIN_LDO LDO input voltage range 2.7 5.5 V Output voltage 2.744 2.8 2.856 ΔVOUT_LDO/VOUT_ VIN = 3.6V accuracy, V LDO IOUT_LDO = 1 mA & 300 mA 2.94 3.0 3.06 VOUT_LDO ΔVOUT_LDO/ΔmA Load regulation(5) IOUT_LDO = 1 mA & 300 mA 8 µV/mA ΔVIN_LDO/ΔVBATT Line regulation(6) VIN_LDO = (VOUT_LDO(NOM) + 0.3V) to 0.2 mV/V 5.5V VDROP Dropout voltage(7) IOUT = 300 mA 120 200 mV IQ Quiescent current Ven = 0.95V, IOUT = 0 mA 50 80 µA ISC-LDO Short circuit current limit VOUT = GND 350 mA System Characteristic (8) PSRR Power supply rejection EN_DC = EN_LILO = GND 85 ratio f = 1 kHz, IOUT = 200 mA dB f = 10 kHz, IOUT = 200 mA 70 Signal to VIN_LDO = 3.6V Output noise voltage (9) BW = 10 Hz to 100 kHz, eN_LDO VIN_LDO = 3.6V 6.7 µVRMS IOUT = 200 mA Dynamic line transient VIN_LDO = 3.8V to 4.4V ΔVIN_LDO response tr, tf = 30 µs +/-2 mV IOUT = 1 mA Dynamic load transient Pulsed load 1 mA & 300 mA ΔVOUT_LDO +/-30 mV response tr, tf = 10 µs (1) All voltages are with respect to the potential at the GND pin. (2) Min and Max limits are guaranteed by design, test, or statistical analysis. Typical (typ.) numbers are not guaranteed, but do represent the most likely norm. Unless otherwise specified, conditions for typ. specifications are: VBATT = 3.6V and TA = 25°C. (3) The parameters in the electrical characteristic table are tested at VBATT = 3.6V unless otherwise specified. For performance over the input voltage range refer to datasheet curves. (4) The input voltage range recommended for ideal applications performance for the specified output voltages is given below:VBATT = 2.7V to 5.5V for 1.0V ≤ VOUT_DCDC < 1.8VVBATT = (VOUT_DCDC + 1V) to 5.5V for 1.8V ≤ VOUT_DCDC < 3.6V (5) To calculate the output voltage from the load regulation specified, use the following equation: ΔVOUT = Load Regulation (%/mA) x Nominal VOUT (V) x ΔIOUT (mA). (6) To calculate the output voltage from the line regulation specified, use the following equation: ΔVOUT = Line Regulation (%/V) x Nominal VOUT (V) x ΔVIN (V). (7) Dropout voltage is defined as the input to output voltage differential at which the output voltage falls to 100 mV below the nominal output voltage. (8) Parameters guaranteed by design. (9) The noise performance target is applied to PWM mode operation and this does not apply when DCDC converter is operating in PFM mode. 8 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Links: LM3686 |
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