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| TS29151/52/53 1.5A Ultra Low Dropout Positive Voltage Regulator Low Dropout Voltage 0.6V max. Enable Input Control Adjustable Output Error Flag Detection General Description The TS29151/52/53 series are using process with a PNP pass element for high current, high accuracy and low dropout voltage regulators. These regulator s feature 350mV(typ) dropout voltages and very low ground current, these devices also find applications in lower current and low dropout critical systems, where their tiny dropout voltage and ground current values are important attributes. The TS29151/52/53 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 TS29151 and TS29152, the enable pin may be tied to Vin if it is not required for enable control. This series are offered in 5-pin TO-263, TO-220 package. Features Dropout voltage typically 0.6V @Io=1.5A Output current up to 1.5A Low ground current Output voltage trimmed before assembly Extremely fast transient response +60V Transient peak voltage -20V Reverse peak voltage Zero current shutdown mode Error flag signals output out of regulation Internal current limit Thermal shutdown protection Ordering Information Part No. TS29151CZ5-xx TS29152CZ5 TS29153CZ5 TS29151CM5-xx TS29152CM5 TS29153CM5 Note: Where xx denotes voltage option, available are 12V, 5.0V, 3.3V and 2.5V. Leave blank for adjustable version. Contact factory for additional voltage options. TO-263-5L -40 ~ +125 C o Operating Temp. (Junction) Package TO-220-5L Applications Battery power equipment Automotive electronics High efficiency "Green" computer system High efficiency linear power supplies High efficiency post regulator for switching supply Absolute Maximum Rating (Note 1) Input Supply Voltage (Note 2) Operation Input Voltage Power Dissipation (Note 3) Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature (260 C) o Vin Vin (operate) PD TJ TSTG -20V ~ +60 26 Internally Limited -25 ~ +125 -65 ~ +150 5 V V W o o C C S TS29151/52/53 1-1 2003/12 rev. D Electrical Characteristics Vin = Vout + 1V, Venable= 2.4V, IL = 10mA, Co = 10uF, Adjustable versions are programmed to 5V output, Tj = 25 oC unless otherwise specified. Parameter Output Voltage Output Voltage Input Supply Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 4) Conditions 10mA IL 1.5A, Vo+1V Vin 26V Min 0.990|Vo| 0.980|Vo| --- Typ 12 / 5.0 3.3/ 2.5 -20 0.05 0.2 80 200 350 8 22 2.1 600 400 260 Max 1.010|Vo| 1.020|Vo| 26 100 0.5 1.0 200 Unit V V ppm/ oC % % mV Vo+1V Vin 26V 10mA IL 1.5A IL=100mA IL=750mA IL=1.5A ------------ 600 --3.5 ---uVrms A mA Quiescent Current (Note 5) Short Circuit Current (Note 6) Output Noise, 10Hz to 100KHz, IL=100mA IL=750mA IL=1.5A Vout=0 CL=2.2uF CL=10uF CL=33uF Reference (TS29152 / TS29153) Reference Voltage Reference Voltage Adjust Pin Bias Current Reference Voltage Temperature Coefficient Adjust Pin Bias Current Temperature Coefficient (Note 7) 10mA IL 1.5A, 2.3V Vin 26V ---40 20 0.1 80 --nA ppm/ oC nA/ oC 0.980|Vo| 0.970|Vo| 1.24 1.020|Vo| 1.030|Vo| V Flag Output (TS29151 / TS29153) Output Leakage Current Output Low Voltage Upper Threshold Voltage Lower Threshold Voltage Hysteresis Input Logic Voltage Enable Pin Input Current Regulator Output Current Shutdown VOH=26V Vin=4.5V, IOL=250uA (Note 8) (Note 8) (Note 8) Low (OFF) High (ON) Ven=26V Ven=0.8V Ven 0.8V, Vin 26V, Vout=0 --40 ---2.4 -----60 75 15 ----10 2 300 -95 -0.8 -750 5 500 uA uA uA mV mV mV mV V Enable Input (TS29151 / TS29152) TS29151/52/53 2-2 2003/12 rev. D Thermal Performance Condition Thermal Resistance Junction to Ambient Package type TO-220-5L TO-263-5L Typ 60 80 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: Maximum positive supply voltage of 60V must be limited duration (<100mS) and duty cycle (<1%). Note 3: 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. Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Note 5: 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. Note 6: Output current will decrease with increasing temperature, but it will be not dropped below 1.5A at the maximum specified temperature. Note 7: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specification are for a 200mA load pulse at Vin=20V(a 4W pulse) for T=10mS Note 8: Comparator thresholds are expressed in terms of a voltage differential at the adjust terminal below the nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = Vout / Vref = (R1+R2) / R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x 5V / 1.24V = 384mV. Thresholds remain constant as a percent of Vout as Vout is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. Block Diagram * Feedback network is fixed output versions only (TS29151) ** Adjustable output version only (TS29152 / TS29153) TS29151/52/53 3-3 2003/12 rev. D Pin Assignment Pin No. TS29151 1 2 3 4 5 5 TS29152 1 2 3 4 2 3 4 1 5 TS29153 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: +26V 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 TS29151 TS29152 TS29153 TS29151/52/53 4-4 2003/12 rev. D Application Information Application Information The TS29151/52/53 series are high performance with low dropout voltage regulator suitable for moderate to high current and voltage regulator application. Its 350mA(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 TS29151/52/53 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 TS29151/52/53 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 TS29151/52/53 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. TS29151/52/53 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 TS29151/52/53 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 TS29151/52/53 5-5 2003/12 rev. D Application Information (continues) Adjustable Regulator Design The adjustable regulator versions (TS29152/53) is allow to programming the output voltage anywhere between 1.25 and the 26V 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 TS29151 and TS29153 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 TS29151 and TS29152 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 30V. Enabling the regulator requires approximately 20uA of current. TS29151/52/53 6-6 2003/12 rev. D 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 TS29151/52/53 7-7 2003/12 rev. D |
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