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LP38842 Datasheet(PDF) 4 Page - Texas Instruments |
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LP38842 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 17 page LP38842 SNVS291C – DECEMBER 2004 – 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 = 10 µF CER, COUT = 22 µF CER, CBIAS = 1 µF CER, VS/D = VBIAS. Min/Max limits are specified through testing, statistical correlation, or design. (1) Symbol Parameter Conditions Min Typ (2) Max Units VO Output Voltage Tolerance 10 mA < IL < 1.5A 0.788 0.812 0.8 VO(NOM) + 1V ≤ VIN ≤ 5.5V 0.776 0.824 4.5V ≤ VBIAS ≤ 5.5V 1.182 1.218 1.2 V 1.164 1.236 1.478 1.523 1.5 1.455 1.545 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 < 1.5A 0.4 0.1 %/A 1.1 VDO Dropout Voltage (5) IL = 1.5A 175 115 mV 315 IQ(VIN) Quiescent Current Drawn from VIN 10 mA < IL < 1.5A 35 30 mA Supply 40 VS/D ≤ 0.3V 1 0.06 µA 30 IQ(VBIAS) Quiescent Current Drawn from 10 mA < IL < 1.5A 4 2 mA VBIAS Supply 6 VS/D ≤ 0.3V 1 0.03 µA 30 ISC Short-Circuit Current VOUT = 0V 4 A Shutdown Input VSDT Output Turn-off Threshold Output = ON 0.7 1.3 V Output = OFF 0.3 0.7 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 θJ-A Junction to Ambient Thermal TO-220, No Heatsink 65 °C/W Resistance DDPAK/TO-263, 1 sq.in Copper 35 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 58 VBIAS = VOUT + 3V, f = 1 kHz 58 en Output Noise Density f = 120 Hz 1 µV/Hz Output Noise Voltage BW = 10 Hz − 100 kHz 150 µV (rms) VOUT = 1.5V BW = 300 Hz − 300 kHz 90 (1) If used in a dual-supply system where the regulator load is returned to a negative supply, the output pin must be diode clamped to ground. (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. 4 Submit Documentation Feedback Copyright © 2004–2013, Texas Instruments Incorporated Product Folder Links: LP38842 |
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