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LP38856 Datasheet(PDF) 3 Page - Texas Instruments |
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LP38856 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 20 page LP38856 www.ti.com SNVS336D – JUNE 2006 – REVISED OCTOBER 2011 Operating Ratings (1) VIN Supply Voltage (VOUT + VDO) to VBIAS VBIAS Supply Voltage 3.0V to 5.5V VEN Enable Input Voltage 0.0V to VBIAS IOUT 0 mA to 3.0A Junction Temperature Range(2) −40°C to +125°C (1) Absolute maximum ratings indicate limits beyond which damage to the component may occur. Operating ratings indicate conditions for which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications, see Electrical Characteristics. Specifications do not apply when operating the device outside of its rated operating conditions. (2) Device power dissipation must be de-rated based on device power dissipation (TD), ambient temperature (TA), and package junction to ambient thermal resistance ( θJA). Additional heat-sinking may be required to ensure that the device junction temperature (TJ) does not exceed the maximum operating rating. See the Application Information section for details. Electrical Characteristics Unless otherwise specified: VIN = VOUT(NOM) + 1V, VBIAS = 3.0V, IOUT = 10 mA, CIN = COUT = 10 µF, CBIAS = 1µF, VEN = VBIAS. Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions MIN TYP MAX Units VOUT(NOM) + 1V ≤ VIN ≤ VBIAS, -1.0 +1.0 3.0V ≤ VBIAS ≤ 5.5V, 0.0 -3.0 +3.0 10 mA ≤ IOUT ≤ 3.0A VOUT Output Voltage Tolerance % VOUT(NOM) + 1V ≤ VIN ≤ VBIAS, 3.0V ≤ VBIAS ≤ 5.5V, -2.0 0 +2.0 10 mA ≤ IOUT ≤ 3.0A, 0°C ≤ TJ ≤ 125°C ΔVOUT/ΔVIN Line Regulation, VIN (1) VOUT(NOM) + 1V ≤ VIN ≤ VBIAS - 0.04 - %/V ΔVOUT/ΔVBIAS Line Regulation, VBIAS (1) 3.0V ≤ VBIAS ≤ 5.5V - 0.10 - %/V ΔVOUT/ΔIOUT Output Voltage Load Regulation(2) 10 mA ≤ IOUT ≤ 3.0A - 0.2 - %/A Dropout Voltage 300 VDO IOUT = 3.0A - 240 mV VIN − VOUT (3) 450 LP38856-0.8 8.5 - 7.0 10 mA ≤ IOUT ≤ 3.0A 9.0 mA Ground Pin Current Drawn from VIN LP38856-1.2 12 IGND(IN) - 11 Supply 10 mA ≤ IOUT ≤ 3.0A 15 10 VEN ≤ 0.5V - 1.0 µA 300 3.8 10 mA ≤ IOUT ≤ 3.0A - 3.0 mA 4.5 Ground Pin Current Drawn from IGND(BIAS) VBIAS Supply 170 VEN ≤ 0.5V - 100 µA 200 VBIAS rising until device is 2.20 2.70 UVLO Under-Voltage Lock-Out Threshold 2.45 V functional 2.00 2.90 VBIAS falling from UVLO threshold 60 300 UVLO(HYS) Under-Voltage Lock-Out Hysteresis 150 mV until device is non-functional 50 350 VIN = VOUT(NOM) + 1V, ISC Output Short-Circuit Current - 6.2 - A VBIAS = 3.0V, VOUT = 0.0V ENABLE Pin VEN = VBIAS - 0.01 - IEN ENABLE pin Current µA -19 -40 VEN = 0.0V, VBIAS = 5.5V -30 -13 -51 1.00 1.50 VEN(ON) Enable Voltage Threshold VEN rising until Output = ON 1.25 V 0.90 1.55 (1) Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage. (2) 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. (3) Dropout voltage is defined the as input to output voltage differential (VIN - VOUT) where the input voltage is low enough to cause the output voltage to drop no more than 2% from the nominal value Copyright © 2006–2011, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LP38856 |
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