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| TS39151/52 1.5A Ultra Low Dropout Positive Voltage Regulator Low Dropout Voltage 0.4V (typ.) Enable Input Control Adjustable Output Error Flag Detection General Description The TS39151/52 series are 1.5A ultra low dropout linear voltage regulators that provide low voltage, high current output from an extremely small package. These regulator offers extremely low dropout (typically 400mV at 1.5A) and very low ground current (typically 12mA at 1.5A). The TS39151/52 series are fully protected against over current faults, reversed input polarity, reversed lead insertion, over temperature operation, positive and negative transient voltage spikes, logic level enable control and error flag which signals whenever the output falls out of regulation. On the TS39151/52, the enable pin may be tied to Vin if it is not required for enable control. This series are offered in 5-pin TO-220, TO-263 package. Features Dropout voltage typically 0.4V @Io=1.5A Output current up to 1.5A Low ground current Output voltage trimmed before assembly Extremely fast transient response Reversed leakage protection Reverse battery protection Error flag signals output out of regulation Internal current limit Thermal shutdown protection Ordering Information Part No. TS39151CZ5xx TS39151CM5xx TS39152CZ5 TS39152CM5 -40 ~ +125 C o Operating Temp. (Junction) Package TO-220-5L TO-263-5L TO-220-5L TO-263-5L Note: Where xx denotes voltage option, available are 5.0V, 3.3V, 2.5V and 1.8V. Applications Battery power equipment LDO linear regulator for PC add-in cards PowerPC TM High efficiency linear power supplies High efficiency post regulator for switching supply Low-voltage microcontrollers and digital logic SMPS post regulator power supplies Multimedia and PC processor supplies Absolute Maximum Rating (Note 1) Supply Voltage Enable Voltage Storage Temperature Range Lead Soldering Temperature (260 oC) ESD Vin Ven TSTG -20V ~ +20 +20 -65 ~ +150 5 (Note 3) V V o C S TS39151/52 1-1 2004/09 rev. A Operating Rating (Note 2) Operation Input Voltage Operation Enable Voltage Power Dissipation (Note 4) Operating Junction Temperature Range Vin (operate) Ven (operate) PD TJ +2.25 ~ +16 +2.25 ~ +16 Internally Limited -40 ~ +125 V V W o C Electrical Characteristics Vin = Vout + 1V, Venable= 2.4V, Tj = 25 oC, unless otherwise specified. Parameter Output Voltage Output Voltage Line Regulation Load Regulation Output Voltage Temp. Coefficient Dropout Voltage (Note 5) Conditions IL=10mA 10mA IL 1.5A, Vo+1V Vin 8V IL=10mA, Vo+1V Vin 16V Vin=Vout+1V, 10mAIL1.5A Min 0.990|Vo| 0.980|Vo| ---- Typ 5.0/3.3 2.5/1.8 0.05 0.2 40 100 275 400 7 17 2.0 7 Max 1.010|Vo| 1.020|Vo| 0.5 1.0 100 200 -600 20 -2.5 10 Unit V % % ppm/ oC mV Vout= -1% IL=100mA IL=750mA IL=1.5A -------- Quiescent Current (Note 6) Current Limited Minimum Load Current Vin=Vout+1V IL=750mA IL=1.5A mA A mA Vout=0, Vin=Vout+1V Reference (TS39152) Reference Voltage Reference Voltage Adjust Pin Bias Current Reference Voltage Temp. Coefficient Adjust Pin Bias Current Temp. Coefficient (Note 8) (Note 7) 0.980|Vo| 0.970|Vo| ---40 20 0.1 1.24 1.020|Vo| 1.030|Vo| 120 --V nA ppm/ oC nA/ oC Flag Output (TS39151) Output Leakage Current Output Low Voltage (Note 9) Upper Threshold Voltage Lower Threshold Voltage Hysteresis VOH=16V Vin=0.9 * Vout, IOL=250uA % of Vout % of Vout ---93 -----1 2 400 99 --uA mV % % % Enable Input (TS39151 / 2) Input Logic Voltage Enable Pin Input Current Low (OFF) High (ON) Ven=2.25V Ven=0.8V -2.25 ------0.8 -75 4 uA V TS39151/52 2-2 2004/09 rev. A Thermal Performance Condition Thermal Resistance Junction to Case Package type TO-220, TO-220-5L TO-263, TO-263-5L Typ 2.0 2.0 Unit o C/W Note 1: Absolute Maximum Rating is limits beyond which damage to the device may occur. For guaranteed specifications and test conditions see the Electrical Characteristics. Note 2: The device is not guaranteed to operate outside its operating rating. Note 3: Devices are ESD sensitive. Handling precautions recommended. Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature, Tj, the junction to ambient thermal resistance, ja, and the ambient temperature, Ta. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The effective value of ja can be reduced by using a heatsink, Pd(max) = (Tj(max) - Ta) / ja. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops -1% below its nominal value measured at 1V differential. Note 6: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the ground pin current and output load current, Iin = Ignd + Iout. Note 7: Vref Vout (Vin - 1V), 2.25V Vin 16V, 10mA IL 1.5A. o Note 8: Output voltage temperature coefficient is Vout (worse cast) / (Tj(max) - Tj(min)) where is Tj(max) +125 C and Tj(min) is 0 oC. Note 9: For adjustable device and fiexed device with Vout > 2.25V. Block Diagram * Flag network is fixed output versions only (TS39151) ** Adjustable output version only (TS39152) TS39151/52 3-3 2004/09 rev. A Pin Assignment Pin No. TS39151 1 2 3 4 5 5 TS39152 1 2 3 4 Pin Configuration Enable Input Ground Output Flag Adjust Pin Description Enable (input): TTL/COMS compatible input. Logic high is enable; logic low or open is shutdown Unregulated input: +16V maximum supply Ground: Ground pin and TAB/heatsink are internally connected. Regulator output Error Flag (output): Open-collector output. Active low indicates an output fault condition. Adjustment input: Feedback input. Connect to resistive voltage-divider network. Typical Application Circuit TS39151 TS39152 TS39151/52 4-4 2004/09 rev. A Application Information Application Information The TS39151/52 series are high performance with low dropout voltage regulator suitable for moderate to high current and voltage regulator application. Its 400mV(typ) dropout voltage at full load and over temperature makes it especially valuable in battery power systems and as high efficiency noise filters in post regulator applications. Unlike normal NPN transistor design, where the base to emitter voltage drop and collector to emitter saturation voltage limit the minimum dropout voltage, dropout performance of the PNP output of these devices is limited only by low Vce saturation voltage. The TS39151/52 series is fully protected from damage due to fault conditions. Linear current limiting is provided. Output current during overload conditions is constant. Thermal shutdown the device when the die temperature exceeds the maximum safe operating temperature. Transient protection allows device survival even when the input voltage spikes above and below nominal. The output structure of these regulators allows voltages in excess of the desired output voltage to be applied without reverse current flow. Thermal Characteristics TS39151/52 series linear regulators are simple to use, the most complicated design parameters to consider are thermal characteristics, thermal design requires the following application specification parameters: Maximum ambient temperature, Ta Output current, Iout Output voltage, Vout Input voltage, Vin We calculate the power dissipation of the regulator from these numbers and the device parameters from this data sheet. A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of the application. Under all possible operating conditions, the junction temperature must be within the range specified under absolute maximum ratings. To determine if the heatsink is required, the power dissipated by the regulator, PD must be calculated. The below formula shows the voltages and currents for calculating the PD in the regulator: Iin = IL / IG PD = (Vin-Vout) * IL + (Vin) * IG Ex. PD = (3.3V-2.5V) * 0.5A + 3.3V * 11mA = 400mW + 36mW = 436mW Remark: IL is output load current, IG is ground current. Vin is input voltage Vout is output voltage The next parameter which must be calculated is the maximum allowable temperature rise, TR(max). this is calculated by the using to formula: TR(max) = TJ(max) - TA(max) Where: TJ(max) is the maximum allowable junction temperature, which is 125 oC for commercial grade parts. TA(max) temperature which is will the be maximum encountered ambient in the Capacitor Requirement The TS39151/52 series requires an output capacitor to maintain stability and improve transient response is necessary. The value of this capacitor is dependent upon the output current, lower currents allow smaller capacitors. TS39151/52 series regulators are stable with the 10uF minimum capacitor value at full load. Where the regulator is powered from a source with high AC impedance, a 0.1uF capacitor connected between input and ground is recommended. The capacitor should have good characteristics to above 250KHz. The capacitance values will be help to improved transient response, ripple rejection and output noise. Minimum Load Current The TS39151/52 series is specified between finite loads. If the output current is too small leakage currents dominate and the output voltage rises. A 10mA minimum load current swamps any expected leakage current across the operating temperature range. application. Using the calculated values for TR(max) and PD, the maximum allowable value for the junction to ambient thermal resistance, ja, can now be found: ja = TR(max) / PD TS39151/52 5-5 2004/09 rev. A Application Information (continues) Adjustable Regulator Design The adjustable regulator versions (TS39152) is allow to programming the output voltage anywhere between 1.25 and the 16V maximum operating rating of the family. Two resistors are used. Resistors can be quite large up to 1M, because of the very high input impedance and low bias current of the sense comparator, the resistor values are calculated by: R1 = R2 * [(Vout / 1.24) - 1] Where is Vout the desired output voltage. Above application circuit shows component definition. Applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation. Error Flag TS39151 versions feature an Error Flag, which looks at the output voltage and signals an error condition when this voltage drops 5% below its expected value. The error flag is an open-collector output that pulls low under fault conditions. It may sink 10mA. Low output voltage signifies a number of possible problems, including an over-current fault (the device is in current limit) and low input voltage. The flag output is inoperative conditions. during over temperature shutdown Enable Input TS39151 and TS39152 versions feature an enable (EN) input that allows ON/OFF control of the device. Special design allows "zero" current drain when the device is disabled-only microamperes of leakage current flow. The EN input has TTL/CMOS compatible thresholds for simple interfacing with logic, or may be directly tied to 20V. Enabling the regulator requires approximately 30uA of current. TS39151/52 6-6 2004/09 rev. A TO-220-5L Mechanical Drawing G A B C H DIM TO-220 DIMENSION MILLIMETERS INCHES MIN 10.00 3.240 2.440 0.260 1.570 13.31 4.475 1.170 27.60 2.175 0.297 8.280 6.010 14.29 MAX 10.50 4.440 2.940 1.020 1.830 14.13 5.225 1.370 29.44 2.925 0.477 8.800 6.510 15.31 MIN 0.394 0.128 0.096 0.010 0.062 0.524 0.176 0.046 1.087 0.086 0.012 0.326 0.237 0.563 MAX 0.413 0.175 0.116 0.040 0.072 0.556 0.206 0.054 1.159 0.115 0.019 0.346 0.256 0.603 M N L I A B C D E F G H I J K L M N F K E D J TO-263-5L Mechanical Drawing A E F J B DIM A B C D E F G H I J I C G D H TO-263 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 10.220 10.260 0.402 0.404 14.600 15.870 0.575 0.625 0.750 0.770 0.030 0.030 1.573 1.827 0.062 0.072 4.560 4.570 0.179 0.180 1.240 1.270 0.049 0.050 2.280 2.790 0.090 0.110 0.280 0.320 0.011 0.013 8.240 8.280 0.324 0.326 1.540 1.800 0.060 0.071 TS39151/52 7-7 2004/09 rev. A |
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