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LP8725TLE-A/NOPB 数据表(PDF) 23 Page - Texas Instruments |
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LP8725TLE-A/NOPB 数据表(HTML) 23 Page - Texas Instruments |
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23 / 46 page  LP8725 www.ti.com SNVS618G – DECEMBER 2009 – REVISED MAY 2013 DIGITAL LDOs (1, 2, 3) (continued) Unless otherwise noted, VIN1=VIN2=VIN3=VINB1=VINB2=VINLILO1=VINLILO2=3.6V; CLODX=1µF; CBUCKOUT=CBUCKIN=4.7 µF, CVIN1–3=CVINLILO1CVINLILO2=2.2 µF. Typical values and limits appearing in normal type apply for TJ=25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ= -40 to +125°C. (1) Symbol Parameter Conditions Min Typ Max Unit VDO Dropout Voltage IOUT = 300 mA 190 270 mV Nominal VOUT = 2.8V (3) IOUT Output Current 0 300 mA ISLEEP Max Output Current in 1 mA Sleep Mode ISC Output Current Limit VOUT = 0V 650 mA eN Output Voltage Noise 10 Hz ≤ f ≤ 100 KHz 35 µVRMS IOUT = 300 mA PSRR Power Supply Rejection f ≤ 10 KHz, IOUT = 20 mA 65 dB Ratio tSTUP Startup Time IOUT = 0 mA to 300 mA in Idle mode. 20 µs VOS Start-up Overshoot IOUT = 300 mA (4) 30 mV COUT External Output (4) 0.5 1 20 µF Capacitance for Stability (3) Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100 mV below its nominal value. (4) This specification is guaranteed by design. LOW-NOISE ANALOG LDOs (4, 5) Unless otherwise noted, VIN1=VIN2=VIN3=VINB1=VINB2=VINLILO1=VINLILO2=3.6V; CLODX=1µF; CBUCKOUT=CBUCKIN=4.7 µF, CVIN1–3=CVINLILO1CVINLILO2=2.2 µF. Typical values and limits appearing in normal type apply for TJ=25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ= -40 to +125°C. (1) Symbol Parameter Conditions Min Typ Max Unit −2 +2 VOUT Output Voltage Accuracy IOUT = 1mA, VOUT = 2.8V % −2.5 +2.5 Line Regulation VOUT + 0.5V ≤ VIN3 ≤ 4.5V 1 IOUT = 1mA (2) ΔVOUT mV Load Regulation 1 < IOUT < 300 mA 1 VDO Dropout Voltage IOUT = 300 mA Nominal VOUT = 2.8V 220 310 mV (3) IOUT Output Current 0 300 mA ISLEEP Max Output Current in 1 mA Sleep Mode ISC Output Current Limit VOUT = 0V 625 mA eN Output Voltage Noise 10 Hz ≤ f ≤ 100 KHz 10 10 µVRMS IOUT = 300 mA PSRR Power Supply Rejection f ≤ 10 KHz, IOUT = 20 mA 75 dB Ratio tSTUP Startup Time IOUT = 0 mA to 300 mA in Idle mode. 35 µs VOS Start-up Overshoot IOUT = 300 mA (4) 30 mV COUT External Output (4) 0.5 1 20 µF Capacitance for Stability (1) Min and Max limits are specified by design, test or statistical analysis. Typical numbers are not verified, but do represent the most likely norm. (2) The minimum input voltage equals VOUT (nom) + 0.5V or 2.5V, which ever is greater. (3) Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100 mV below its nominal value. (4) This specification is guaranteed by design. Copyright © 2009–2013, Texas Instruments Incorporated Submit Documentation Feedback 23 Product Folder Links: LP8725 |
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