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LP3981ILDX-2.83 Datasheet(PDF) 5 Page - Texas Instruments |
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LP3981ILDX-2.83 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 21 page LP3981 www.ti.com SNVS159G – OCTOBER 2001 – REVISED MAY 2013 Electrical Characteristics Unless otherwise specified: VEN = 1.2V, VIN = VOUT + 0.5V, CIN = 2.2 µF, CBP = 0.033 µF, IOUT = 1mA, COUT = 2.2 µF. Typical values and imits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C. (1) (2) Limit Symbol Parameter Conditions Typ Units Min Max Output Voltage −2 2 % of Tolerance −3 3 VOUT(nom) VIN = VOUT + 0.5V to 6.0V, TA < +85°C 0.005 −0.1 0.1 %/V ΔVOUT Line Regulation Error VIN = VOUT + 0.5V to 6.0V, TJ ≤125°C −0.2 0.2 %/V Load Regulation Error IOUT = 1 mA to 300 mA 0.0003 0.005 %/mA (3) VIN = VOUT(nom) + 1V, 50 f = 1 kHz, IOUT = 50 mA (Figure 4) PSRR Power Supply Rejection Ratio (4) dB VIN = VOUT(nom) + 1V, 55 f = 10 kHz, IOUT = 50 mA (Figure 4) IQ Quiescent Current VEN = 1.2V, IOUT = 1 mA 70 120 VEN = 1.2V, IOUT = 1 to 300 mA, 170 210 µA VOUT = 2.5V (5) VEN = 0.4V 0.003 1.5 IOUT = 1 mA 0.5 5 Dropout Voltage (6) IOUT = 200 mA 88 133 mV IOUT = 300 mA 132 200 ISC Short Circuit Current Limit Output Grounded 600 mA (Steady State) en Output Noise Voltage BW = 10 Hz to 100 kHz, 35 µVrms CBP = 0.033µF Thermal Shutdown Temperature 160 °C TSD Thermal Shutdown Hysteresis 20 °C IOUT(PK) Peak Output Current VOUT ≥ VOUT (nom) - 5% 455 300 IEN Maximum Input Current at VEN VEN = 0 and VIN 0.001 µA VIL Logic Low Input threshold VIN = 2.7 to 6.0V 0.4 V VIH Logic High Input threshold VIN = 2.7 to 6.0V 1.4 V TON Turn-On Time (4) (7) CBYPASS = 0.033 µF 240 350 µs (1) Min and Max Limits are specified by design, test, or statistical analysis. Typical (Typ.) numbers are not verified, but do represent the most likely norm. (2) The target output voltage, which is labeled VOUT(nom), is the desired voltage option. (3) An increase in the load current results in a slight decrease in the output voltage and vice versa. (4) Specified by design. Not production tested. (5) For VOUT > 2.5C, Increase IQ(MAX) by 2.5µA for every 0.1V increase in VOUT(NOM).i.e. IQ(MAX) = 210 + ((VOUT(NOM) - 2.5) * 25)µA (6) Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification does not apply for input voltages below 2.5V. (7) Turn-on time is time measured between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal value. Copyright © 2001–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LP3981 |
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