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LP3893 Datasheet(PDF) 3 Page - Texas Instruments |
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LP3893 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 16 page LP3893 www.ti.com SNVS237B – SEPTEMBER 2003 – REVISED APRIL 2013 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 =10 µF, VS/D = VBIAS. Symbol Parameter Conditions Typical (1) MIN (2) MAX (2) Units VO Output Voltage Tolerance 10 mA ≤ IL ≤ 3A 1.198 1.234 1.216 VO(NOM) + 1V ≤ VIN ≤ 5.5V 1.186 1.246 4.5V ≤ VBIAS ≤ 6V 1.478 1.522 1.5 V 1.455 1.545 1.773 1.827 1.8 1.746 1.854 ΔVO/ΔVI Output Voltage Line Regulation (3) VO(NOM) + 1V ≤ VIN ≤ 5.5V 0.01 %/V N ΔVO/ΔIL Output Voltage Load Regulation (4) 10 mA ≤ IL ≤ 3A 0.04 %/A 0.06 VDO Dropout Voltage (5) IL = 3A 650 270 mV 1000 IQ(VIN) Quiescent Current Drawn from VIN 10 mA ≤ IL ≤ 3A 7 3 mA Supply 8 VS/D ≤ 0.3V 1 0.03 µA 30 IQ(VBIAS) Quiescent Current Drawn from VBIAS 10 mA ≤ IL ≤ 3A 2 1 mA Supply 3 VS/D ≤ 0.3V 1 0.03 µA 30 ISC Short-Circuit Current VOUT = 0V 6 A Shutdown Input VSDT Output Turn-off Threshold Output = ON 0.7 1.3 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 Ripple Rejection for VIN Input Voltage VIN = VOUT +1V, f = 120 Hz 80 (VIN) VIN = VOUT + 1V, f = 1 kHz 65 dB PSRR Ripple Rejection for VBIAS Voltage VBIAS = VOUT + 3V, f = 120 Hz 70 (VBIAS) VBIAS = VOUT + 3V, f = 1 kHz 65 Output Noise Density f = 120 Hz µV/root − 1 Hz en Output Noise Voltage BW = 10 Hz − 100 kHz, VOUT = 1.8V 150 µV (rms) BW = 300 Hz − 300 kHz, VOUT = 1.8V 90 (1) Typical numbers represent the most likely parametric norm for 25°C operation. (2) Limits are specified through testing, statistical correlation, or design. (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. Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LP3893 |
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