TS39151 TSC | Alldatasheet
Document overview
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Technical content
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
Note: Where xx denotes voltage option, available are Part No. Operating Temp. (Junction) Package TS39151CZ5xx TO-220-5L TS39151CM5xx TO-263-5L TS39152CZ5 TO-220-5L TS39152CM5 -40 ~ +125 oC TO-263-5L
Applications
Battery power equipment LDO linear regulator for PC add-in cards PowerPCTM power supplies Multimedia and PC processor supplies High efficiency linear power supplies High efficiency post regulator for switching supply Low-voltage microcontrollers and digital logic SMPS post regulator Absolute Maximum Rating (Note 1) Supply Voltage Vin -20V ~ +20 V Enable Voltage Ven +20 V Storage Temperature Range T STG -65 ~ +150 oC Lead Soldering Temperature (260 oC) 5 S ESD (Note 3)
TS39151/52 2-2 2004/09 rev. A 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) P D Internally Limited W Operating Junction Temperature Range T J -40 ~ +125 oC
Electrical Characteristics
Vin = Vout + 1V, Venable= 2.4V, Tj = 25 oC, unless otherwise specified. Parameter Conditions Min Typ Max Unit Output Voltage I L=10mA 0.990|Vo| 1.010|Vo| Output Voltage 10mA ≤ IL ≤ 1.5A, Vo+1V ≤ Vin ≤ 8V 0.980|Vo| 5.0/3.3 2.5/1.8 1.020|Vo| V Line Regulation I L=10mA, Vo+1V ≤Vin≤ 16V -- 0.05 0.5 % Load Regulation Vin=Vout+1V, 10mA≤IL≤1.5A -- 0.2 1.0 % Output Voltage Temp. Coefficient -- 40 100 ppm/ oC Dropout Voltage (Note 5) ∆Vout= -1% IL=100mA IL=750mA IL=1.5A 100 275 400 200 600 mV Quiescent Current (Note 6) Vin=V out+1V IL=750mA IL=1.5A mA Current Limited Vout=0, Vin=Vout+1V -- 2.0 2.5 A Minimum Load Current -- 7 10 mA Reference (TS39152) Reference Voltage 0.980|Vo| 1.020|Vo| Reference Voltage (Note 7) 0.970|Vo| 1.24 1.030|Vo| V Adjust Pin Bias Current -- 40 120 nA Reference Voltage Temp. Coefficient (Note 8) -- 20 -- ppm/ oC Adjust Pin Bias Current Temp. Coefficient -- 0.1 -- nA/ oC Flag Output (TS39151) Output Leakage Current V OH=16V -- -- 2 uA Output Low Voltage (Note 9) Vin=0.9 * Vout, I OL=250uA -- -- 400 mV Upper Threshold Voltage % of Vout -- -- 99 % Lower Threshold Voltage % of Vout 93 -- -- % Hysteresis -- 1 -- % Enable Input (TS39151 / 2) Low (OFF) -- -- 0.8 Input Logic Voltage High (ON) 2.25 -- -- V Ven=2.25V -- -- 75 Enable Pin Input Current Ven=0.8V -- -- 4 uA
TS39151/52 3-3 2004/09 rev. A Thermal Performance Condition Package type Typ Unit TO-220, TO-220-5L 2.0 Thermal Resistance Junction to Case TO-263, TO-263-5L 2.0 oC/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 t he input to output differential at whic h the output voltage dr ops -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. Note 8: Output voltage te mperature coefficient is ∆Vout (worse cast) / (Tj (max) - Tj(min)) where is Tj (max) +125 oC 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 4-4 2004/09 rev. A Pin Assignment Pin No. TS39151 TS39152 Pin Configuration Pin
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 Output Regulator output 5 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 5-5 2004/09 rev. A
Application Information
The TS39151/52 series are high performance with low dropout voltage regulator suit able for moderate to high current and voltage regulat or 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, dr opout performance of the PNP output of these devices is limited only by low Vce saturation voltage. The TS39151/52 series is fu lly protected from damage due to fault conditions. Linear current limiting is provided. Output current dur ing overload conditions is constant. Thermal shutdow n the device when the die temperature exceeds the maximum safe operating temperature. Transient protection allows device survival even when the input volt age 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. Capacitor Requirement The TS39151/52 series require s an output capacitor to maintain stability and improv e 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 c apacitor connected between input and ground is reco mmended. The capacitor should have good characteristics to above 250KHz. The capacitance values will be hel p 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. 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 di ssipation 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 t he 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 dissi pated by the regulator, P D must be calculated. The below formula shows the voltages and currents for calculating the P D in the regulator: Iin = IL / IG PD = (Vin-Vout) * IL + (Vin) * IG = 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 mu st be calculated is the maximum allowable temperature rise, T R(max). this is calculated by the using to formula: T R(max) = TJ(max) – TA(max) Where: T J(max) is the maximum allowable junction temperature, which is 125 oC for commercial grade parts. T A(max) is the maximum ambient temperature which w ill be encountered in the application. Using the ca lculated values for T R(max) and PD, the maximum allowable value for the junction to ambient thermal resistance, θja, can now be found: θja = TR(max) / PD
TS39151/52 6-6 2004/09 rev. A Application Information (continues) Adjustable Regulator Design The adjustable regulator ve rsions (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. Re sistors can be quite large up to 1M Ω, because of the very high input impedance and low bias current of t he sense comparator, the resistor values are calculated by: Where is Vout the desir ed output voltage. Above application circuit show s 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-collect or output that pulls low under fault conditions. It may sink 10mA. Low output voltage signifies a number of possible problems, including an over-current faul t (the device is in current limit) and low input volt age. 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 “zer o” current drain when the device is disabled–only mi croamperes 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 7-7 2004/09 rev. A TO-220-5L Mechanical Drawing TO-220 DIMENSION MILLIMETERS INCHES DIM MIN MAX MIN MAX A 10.00 10.50 0.394 0.413 B 3.240 4.440 0.128 0.175 C 2.440 2.940 0.096 0.116 D 0.260 1.020 0.010 0.040 E 1.570 1.830 0.062 0.072 F 13.31 14.13 0.524 0.556 G 4.475 5.225 0.176 0.206 H 1.170 1.370 0.046 0.054 I 27.60 29.44 1.087 1.159 J 2.175 2.925 0.086 0.115 K 0.297 0.477 0.012 0.019 L 8.280 8.800 0.326 0.346 M 6.010 6.510 0.237 0.256 N 14.29 15.31 0.563 0.603 TO-263-5L Mechanical Drawing B D C A J I H G F E TO-263 DIMENSION MILLIMETERS INCHES DIM MIN MAX MIN MAX A 10.220 10.260 0.402 0.404 B 14.600 15.870 0.575 0.625 C 0.750 0.770 0.030 0.030 D 1.573 1.827 0.062 0.072 E 4.560 4.570 0.179 0.180 F 1.240 1.270 0.049 0.050 G 2.280 2.790 0.090 0.110 H 0.280 0.320 0.011 0.013 I 8.240 8.280 0.324 0.326 J 1.540 1.800 0.060 0.071 C D B F E A N L I K J M H G