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LP3985ITLX-4.8 Datasheet(PDF) 6 Page - Texas Instruments |
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LP3985ITLX-4.8 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 29 page LP3985 SNVS087AC – OCTOBER 2000 – REVISED MAY 2013 www.ti.com Electrical Characteristics Unless otherwise specified: VIN = VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF, CBYPASS = 0.01µF. Typical values and limits 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 IOUT = 1mA −2 2 % of Tolerance −3 3 VOUT(nom) Line Regulation Error VIN = (VOUT(nom) + 0.5V) to 6.0V, For 4.7 to 5.0 options −0.19 0.19 %/V ΔVOUT For all other options −0.1 0.1 Load Regulation Error(3) IOUT = 1 mA to 150 mA 0.0025 0.005 LP3985IM5 (SOT23-5) %/mA LP3985 (DSBGA) 0.0004 0.002 Output AC Line Regulation VIN = VOUT(nom) + 1V, 1.5 mVP-P IOUT = 150 mA (Figure 5) VIN = VOUT(nom) + 0.2V, 50 f = 1 kHz, IOUT = 50 mA (Figure 6) PSRR Power Supply Rejection Ratio dB VIN = VOUT(nom) + 0.2V, 40 f = 10 kHz, IOUT = 50 mA (Figure 6) IQ Quiescent Current VEN = 1.4V, IOUT = 0 mA For 4.7 to 5.0 options 100 165 For all other options 85 150 VEN = 1.4V, IOUT = 0 to 150 mA µA For 4.7 to 5.0 options 155 250 For all other options 140 200 VEN = 0.4V 0.003 1.5 Dropout Voltage(4) IOUT = 1 mA 0.4 2 IOUT = 50 mA 20 35 mV IOUT = 100 mA 45 70 IOUT = 150 mA 60 100 ISC Short Circuit Current Limit Output Grounded 600 mA (Steady State) IOUT(PK) Peak Output Current VOUT ≥ VOUT(nom) - 5% 550 300 mA TON Turn-On Time(5) CBYPASS = 0.01 µF 200 µs en Output Noise Voltage(6) BW = 10 Hz to 100 kHz, 30 µVrms COUT = 1µF Output Noise Density CBP = 0 230 nV/ √Hz IEN Maximum Input Current at EN VEN = 0.4 and VIN = 6.0 ±1 nA VIL Maximum Low Level Input Voltage VIN = 2.5 to 6.0V 0.4 V at EN VIH Minimum High Level Input Voltage VIN = 2.5 to 6.0V 1.4 V at EN Thermal Shutdown Temperature 160 °C TSD Thermal Shutdown Hysteresis 20 °C (1) All limits are verified. All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C or correlated using Statistical Quality Control (SQC) methods. All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control. (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) 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. (5) Turn-on time is time measured between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal value. (6) The output noise varies with output voltage option. The 30µVrms is measured with 2.5V voltage option. To calculate an approximated output noise for other options, use the equation: (30µVrms)(X)/2.5, where X is the voltage option value. 6 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP3985 |
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