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LP3881 Datasheet(PDF) 4 Page - Texas Instruments |
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LP3881 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 18 page LP3881 SNVS224F – MARCH 2003 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, VBIAS = 4.5V, IL = 10 mA, CIN = COUT = 4.7 µF, VS/D = VBIAS. Symbol Parameter Conditions Min(1) Typical(2) Max(1) Units VO Output Voltage Tolerance 10 mA < IL < 0.8A 1.198 1.234 VO(NOM) + 1V ≤ VIN ≤ 5.5V 1.216 4.5V ≤ VBIAS ≤ 6V 1.186 1.246 1.478 1.522 1.5 V 1.455 1.545 1.773 1.827 1.8 1.746 1.854 ΔVO/ΔVIN Output Voltage Line Regulation(3) VO(NOM) + 1V ≤ VIN ≤ 5.5V 0.01 %/V ΔVO/ΔIL Output Voltage Load Regulation(4) 10 mA < IL < 0.8A 0.04 %/A 0.06 VDO Dropout Voltage(5) IL = 0.8A 120 75 (TO220 and TO263 only) 160 mV IL = 0.8A 140 80 (SOIC only) 190 IQ(VIN) Quiescent Current Drawn from VIN 10 mA < IL < 0.8A 7 3 mA Supply 8 VS/D ≤ 0.3V 1 0.03 µA 30 IQ(VBIAS) Quiescent Current Drawn from 10 mA < IL < 0.8A 2 1 mA VBIAS Supply 3 VS/D ≤ 0.3V 1 0.03 µA 30 ISC Short-Circuit Current VOUT = 0V 2.5 A Shutdown Input VSDT Output Turn-off Threshold Output = ON 1.3 0.7 V Output = OFF 0.7 0.3 Td (OFF) Turn-OFF Delay RLOAD X COUT << Td (OFF) 20 µs Td (ON) Turn-ON Delay RLOAD X COUT << Td (ON) 15 IS/D S/D Input Current VS/D =1.3V 1 µA VS/D ≤ 0.3V −1 AC Parameters PSRR (VIN) Ripple Rejection for VIN Input VIN = VOUT +1V, f = 120 Hz 80 Voltage VIN = VOUT + 1V, f = 1 kHz 65 dB PSRR (VBIAS) Ripple Rejection for VBIAS Voltage VBIAS = VOUT + 3V, f = 120 Hz 70 VBIAS = VOUT + 3V, f = 1 kHz 65 Output Noise Density f = 120 Hz µV/root −H 1 z en Output Noise Voltage BW = 10 Hz − 100 kHz 150 µV (rms) VOUT = 1.8V BW = 300 Hz − 300 kHz 90 (1) Limits are specified through testing, statistical correlation, or design. (2) Typical numbers represent the most likely parametric norm for 25°C operation. (3) Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage. (4) Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load to full load. (5) Dropout voltage is defined as the minimum input to output differential required to maintain the output with 2% of nominal value. The SOIC-8 package devices have a slightly higher dropout voltage due to increased band wire resistance. 4 Submit Documentation Feedback Copyright © 2003–2013, Texas Instruments Incorporated Product Folder Links: LP3881 |
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