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LP3875ES-3.3 Datasheet(PDF) 5 Page - Texas Instruments |
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LP3875ES-3.3 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 25 page  LP3872, LP3875 www.ti.com SNVS227F – FEBRUARY 2003 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS – LP3872/LP3875 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, IL = 10 mA, COUT = 10µF, VSD = 2V. Typ (1) LP3872/5 (2) Symbol Parameter Conditions Units Min Max Output Voltage Tolerance (3) -1.5 +1.5 VO VOUT +1V ≤ VIN ≤ 7.0V, 10 mA ≤ IL ≤ 1.5A 0 % -3.0 +3.0 Output Voltage Line Regulation (3) 0.02 ΔV OL VOUT + 1V ≤ VIN ≤ 7.0V % 0.06 ΔVO/ Output Voltage Load Regulation (3) 0.06 10 mA ≤ IL ≤ 1.5A % ΔIOUT 0.12 50 IL = 150 mA 38 60 VIN - Dropout Voltage (4) mV VOUT 450 IL = 1.5A 380 550 9 IL = 150 mA 5 10 Ground Pin Current In Normal IGND mA Operation Mode 14 IL = 1.5A 6 15 Ground Pin Current In Shutdown VSD ≤ 0.3V 0.01 10 µA IGND Mode -40°C ≤ TJ ≤ 85°C 50 IO(PK) Peak Output Current VO ≥ VO(NOM) - 4% 1.8 A Short Circuit Protection ISC Short Circuit Current 3.2 A Shutdown Input Output = High VIN 2 VSDT Shutdown Threshold V Output = Low 0 0.3 TdOFF Turn-off delay IL = 1.5A 20 µs TdON Turn-on delay IL = 1.5A 25 µs ISD SD Input Current VSD = VIN 1 nA Error Flag VT Threshold See (5) 10 5 16 % VTH Threshold Hysteresis See (5) 5 2 8 % VEF(Sat) Error Flag Saturation Isink = 100µA 0.02 0.1 V Td Flag Reset Delay 1 µs Ilk Error Flag Pin Leakage Current 1 nA Imax Error Flag Pin Sink Current VError = 0.5V 1 mA AC Parameters VIN = VOUT + 1V, COUT = 10µF 73 VOUT = 3.3V, f = 120Hz PSRR Ripple Rejection dB VIN = VOUT + 0.5V, COUT = 10µF 57 VOUT = 3.3V, f = 120Hz ρn(l/f) Output Noise Density f = 120Hz 0.8 µV BW = 10Hz – 100kHz, VOUT = 2.5V 150 µV en Output Noise Voltage (rms) BW = 300Hz – 300kH, VOUT = 2.5V 100 (1) Typical numbers are at 25°C and represent the most likely parametric norm. (2) Limits are specified by testing, design, or statistical correlation. (3) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage. Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the output voltage tolerance specification. (4) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is nothing but the input to output differential, since the minimum input voltage is 2.5V. (5) Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints. Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LP3872 LP3875 |
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