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LP5951 Datasheet(PDF) 4 Page - Texas Instruments |
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LP5951 Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 26 page  LP5951 SNVS345E – JUNE 2006 – REVISED JANUARY 2011 www.ti.com Electrical Characteristics (1) (2) Typical values and limits appearing in standard typeface are for TA = 25°C. Limits appearing in boldface type apply over the full operating temperature range: -40°C ≤ TJ ≤ +125°C. Unless otherwise noted, VIN = VOUT(NOM) + 1V, CIN = 1µF, COUT = 1µF, VEN = 0.9V. Symbol Parameter Condition Typ Limit Units Min Max VIN Input Voltage VIN ≥ VOUT(NOM) + VDO 1.8 5.5 V IOUT = 1mA -2.0 2.0 % Output Voltage Tolerance -30°C ≤ TJ ≤ +125°C -3.5 3.5 % Line Regulation Error VIN = VOUT(NOM) + 1V to 5.5V 0.1 %/V ΔVOUT IOUT = 1mA Load Regulation Error IOUT = 1mA to 150mA -0.01 %/mA VDO Output Voltage Dropout IOUT = 150mA (3) VOUT ≥ 2.5V 250 mV VOUT < 2.5V 200 350 mV IQ Quiescent Current VEN = 0.9V, ILOAD = 0 29 55 µA VEN = 0.9V, ILOAD = 150mA 33 70 µA VEN = 0V 0.005 1 µA ISC Output Current VIN = VOUT(NOM) + 1V 400 150 mA (short circuit) PSRR Power Supply Sine modulated VIN Rejection Ratio f = 100Hz 60 dB f = 1kHz 60 dB f = 10kHz 50 dB EN Output Noise BW = 10Hz - 100kHz 125 µVRMS TSD Thermal Shutdown 160 °C Temperature Hysteresis 20 °C (1) All voltages are with respect to the potential at the GND pin. (2) Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. (3) Dropout voltage is defined as the input to output voltage differential at which the output voltage falls to 100mV below the nominal output voltage. This specification does not apply for output voltages below 1.8V. Enable Control Characteristics Symbol Parameter Conditions Typical Limit Units Min Max IEN Maximum Input Current at 0V ≤ VEN ≤ VIN, VIN = 5.5V -1 1 µA VEN Input VIL Low Input Threshold VIN = 1.8..5.5V 0.4 V (shutdown) VIH High Input Threshold VIN = 1.8..5.5V 0.9 V (enable) Transient Characteristics Symbol Parameter Conditions Typical Limit Units Min Max ΔVOUT Dynamic Line Transient VIN = VOUT(NOM) + 1V to ±2 mV VOUT(NOM) + 1V + 0.6V in 30µs, no load ΔVOUT Dynamic Load IOUT = 0mA to 150mA in 10µs -30 mV Transient IOUT = 150mA to 0mA in 10µs 20 mV IOUT = 1mA to 150mA in 1µs -50 mV IOUT = 150mA to 1mA in 1µs 40 mV ΔVOUT Overshoot on Startup Nominal conditions 10 mV TON Turn on time IOUT = 1mA 30 µs 4 Submit Documentation Feedback Copyright © 2006–2011, Texas Instruments Incorporated Product Folder Links: LP5951 |
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