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 Ordering Information Dropout voltage typically 0.4V @Io=1.5A Part No. Output current up to 1.5A Low ground current Operating Temp. (Junction) TS39151CZ5xx Output voltage trimmed before assembly TS39151CM5xx Extremely fast transient response Reversed leakage protection Reverse battery protection Package TO-220-5L o -40 ~ +125 C TO-263-5L TS39152CZ5 TO-220-5L TS39152CM5 TO-263-5L Note: Where xx denotes voltage option, available are 5.0V, 3.3V, 2.5V and 1.8V. Error flag signals output out of regulation Internal current limit Thermal shutdown protection Applications Battery power equipment High efficiency linear power supplies LDO linear regulator for PC add-in cards High efficiency post regulator for switching supply TM PowerPC Low-voltage microcontrollers and digital logic power supplies Multimedia and PC processor supplies SMPS post regulator Absolute Maximum Rating (Note 1) Supply Voltage Vin -20V ~ +20 Enable Voltage Ven +20 Storage Temperature Range TSTG Lead Soldering Temperature (260 oC) 5 ESD TS39151/52 -65 ~ +150 (Note 3) 1-1 2004/09 rev. A V V o C S Operating Rating (Note 2) Operation Input Voltage Vin (operate) +2.25 ~ +16 V Operation Enable Voltage Ven (operate) +2.25 ~ +16 V Power Dissipation (Note 4) PD Internally Limited W Operating Junction Temperature Range TJ -40 ~ +125 o C Electrical Characteristics Vin = Vout + 1V, Venable= 2.4V, Tj = 25 oC, unless otherwise specified. Parameter Conditions Min Typ Max Output Voltage IL=10mA 0.990|Vo| 5.0/3.3 1.010|Vo| Output Voltage 10mA ≤ IL ≤ 1.5A, 0.980|Vo| 2.5/1.8 1.020|Vo| Unit V Vo+1V ≤ Vin ≤ 8V Line Regulation IL=10mA, Vo+1V ≤Vin≤ 16V -- 0.05 0.5 % Load Regulation Vin=Vout+1V, -- 0.2 1.0 % -- 40 100 ppm/ oC IL=100mA -- 100 200 IL=750mA -- 275 -- IL=1.5A -- 400 600 IL=750mA -- 7 20 IL=1.5A -- 17 -- mA -- 2.0 2.5 A -- 7 10 mA 0.980|Vo| 1.24 1.020|Vo| 10mA≤IL≤1.5A Output Voltage Temp. Coefficient Dropout Voltage (Note 5) Quiescent Current (Note 6) Current Limited ∆Vout= -1% Vin=Vout+1V Vout=0, Vin=Vout+1V Minimum Load Current mV Reference (TS39152) Reference Voltage Reference Voltage (Note 7) 0.970|Vo| Adjust Pin Bias Current Reference Voltage Temp. Coefficient (Note 8) Adjust Pin Bias Current Temp. 1.030|Vo| V -- 40 120 nA -- 20 -- ppm/ oC -- 0.1 -- nA/ oC Coefficient Flag Output (TS39151) Output Leakage Current VOH=16V -- -- 2 uA Output Low Voltage (Note 9) Vin=0.9 * Vout, IOL=250uA -- -- 400 mV Upper Threshold Voltage % of Vout -- -- 99 % Lower Threshold Voltage % of Vout 93 -- -- % -- 1 -- % Low (OFF) -- -- 0.8 V High (ON) 2.25 -- -- Ven=2.25V -- -- 75 Ven=0.8V -- -- 4 Hysteresis Enable Input (TS39151 / 2) Input Logic Voltage Enable Pin Input Current TS39151/52 2-2 2004/09 rev. A uA Thermal Performance Condition Package type Typ Thermal Resistance TO-220, TO-220-5L 2.0 Junction to Case TO-263, TO-263-5L 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, θja, 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 θja can be reduced by using a heatsink, Pd(max) = (Tj(max) – Ta) / Θja. 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. Pin Pin TS39151 TS39152 Configuration Description 1 1 Enable Enable (input): TTL/COMS compatible input. Logic high is enable; logic low or open is shutdown 2 2 Input Unregulated input: +16V maximum supply 3 3 Ground Ground: Ground pin and TAB/heatsink are internally connected. 4 4 5 Output Regulator output Flag Error Flag (output): Open-collector output. Active low indicates an output fault condition. 5 Adjust 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 Thermal Characteristics The TS39151/52 series are high performance with low TS39151/52 series linear regulators are simple to use, dropout voltage regulator suitable for moderate to high the most complicated design parameters to consider current are thermal characteristics, thermal design requires the and voltage regulator application. Its 400mV(typ) dropout voltage at full load and over following application specification parameters: temperature makes it especially valuable in battery Maximum ambient temperature, Ta power systems and as high efficiency noise filters in Output current, Iout post Output voltage, Vout regulator applications. Unlike normal NPN transistor design, where the base to emitter voltage Input voltage, Vin drop and collector to emitter saturation voltage limit the We calculate the power dissipation of the regulator minimum dropout voltage, dropout performance of the from these numbers and the device parameters from PNP output of these devices is limited only by low Vce this data sheet. A heatsink may be required depending saturation voltage. on the maximum power dissipation and maximum The TS39151/52 series is fully protected from damage ambient temperature of the application. Under all due to fault conditions. Linear current limiting is possible operating conditions, the junction temperature provided. Output current during overload conditions is must be within the range specified under absolute constant. Thermal shutdown the device when the die maximum ratings. To determine if the heatsink is temperature exceeds the maximum safe operating required, the power dissipated by the regulator, PD temperature. Transient protection allows device survival must be calculated. even when the input voltage spikes above and below The below formula shows the voltages and currents for nominal. The output structure of these regulators allows calculating the PD in the regulator: voltages in excess of the desired output voltage to be Iin = IL / IG applied without reverse current flow. PD = (Vin-Vout) * IL + (Vin) * IG Capacitor Requirement Ex. PD = (3.3V-2.5V) * 0.5A + 3.3V * 11mA 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. = 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. Minimum Load Current TA(max) 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. TS39151/52 = 400mW + 36mW 5-5 temperature which is the will be maximum encountered ambient in the application. Using the calculated values for TR(max) and PD, the maximum allowable value for the junction to ambient thermal resistance, θja, can now be found: θja = TR(max) / PD 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 1MΩ, 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 during over temperature shutdown conditions. 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 B A H C DIM M N L I F K E TO-220 DIMENSION MILLIMETERS INCHES A B C D E F G H I MIN 10.00 3.240 2.440 0.260 1.570 13.31 4.475 1.170 27.60 MAX 10.50 4.440 2.940 1.020 1.830 14.13 5.225 1.370 29.44 MIN 0.394 0.128 0.096 0.010 0.062 0.524 0.176 0.046 1.087 MAX 0.413 0.175 0.116 0.040 0.072 0.556 0.206 0.054 1.159 J K L M N 2.175 0.297 8.280 6.010 14.29 2.925 0.477 8.800 6.510 15.31 0.086 0.012 0.326 0.237 0.563 0.115 0.019 0.346 0.256 0.603 J D TO-263-5L Mechanical Drawing A E F J B I C G D TS39151/52 H 7-7 DIM A B C D E F G H I J 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 2004/09 rev. A