TS39154 1.5A Ultra Low LDO with Enable TO-252-4L (PPAK) Pin Definition: 1. Enable 2. Input 3. Ground 4. Output 5. Adjustable General Description TS39154 is 1.5A ultra low dropout linear voltage regulators that provide low voltage, high current output from an extremely small package. This regulator offers extremely low dropout (typically 400mV at 1.5A) and very low ground current (typically 25mA at 1.5A). TS39154 is 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. On the TS39154, the enable pin may be tied to VIN if it is not required for enable control. Features ● ● ● ● ● ● ● Ordering Information Dropout voltage typically 0.4V @ Io=1.5A Output Current up to 1.5A Low Ground Current Extremely Fast Transient Response Reversed Leakage & Reverse Battery Protection Internal Current Limit Thermal Shutdown Protection Part No. TS39154CP4 RO Package Packing TO-252-4L 2,500pcs / 13” Reel Application ● ● ● ● ● ● ● TM PowerPC Power Supplies Battery Powered Equipment Consumer and Personal Electronics High Efficiency Linear Power Supplies SMPS Post Regulator and DC to DC Modules High-efficiency Post Regulator for Switching Supply Low-Voltage microcontrollers and Digital Logic Absolute Maximum Rating (Note 1) Supply Voltage VIN -20V ~ +20 Enable Voltage VEN +20 Storage Temperature Range TSTG o Lead Soldering Temperature (260 C) -65 ~ +150 5 ESD V V o C S (Note 3) 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 Operating Junction Temperature Range TJ 1/7 -40 ~ +125 W o C Version: D08 TS39154 1.5A Ultra Low LDO with Enable Electrical Characteristics o VIN = VOUT + 1V, VIN =2.5V for fixed reference output voltage, Venable= 2.25V, Ta = 25 C, unless otherwise specified. Parameter Conditions Reference Output Voltage Reference Output Voltage (Note 7) Line Regulation Load Regulation IL=10mA 10mA ≤ IL ≤ 1.5A, 2.5V ≤ VIN ≤ 8V IL=10mA, Vo+1V ≤ VIN ≤ 16V VIN =Vout+1V, 10mA≤IL≤1.5A Min 0.980|Vo| Typ Max Unit 1.020|Vo| 0.970|Vo| 1.24 (VREF) --- 0.05 0.2 0.5 1.0 % % Output Voltage Temp. Coefficient Adjust Pin Bias Current --- 40 40 100 120 ppm/ C nA Adjust Pin Bias Current Temp. Coefficient (Note 8) -- 0.1 -- nA/ C ---- 100 275 400 250 350 700 mV ---- 5 7 25 18 20 -- mA Dropout Voltage (Note 5) Δ VOUT = -1% IL=100mA IL=750mA IL=1.5A Quiescent Current (Note 6) VIN= VOUT +1V IL=100mA IL=750mA IL=1.5A Current Limited VOUT=0, VIN =VOUT+1V Low (OFF) 1.8 -- 2.0 -- -0.8 High (ON) VEN =2.25V 2.25 -- --- -75 VEN =0.8V -- -- 4 Input Logic Voltage Enable Pin Input Current V 1.030|Vo| o o A V uA Thermal Performance Condition Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient Symbol Typ Unit RθJC 10 o C/W RθJA 100 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, ӨJA, 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 ӨJA can be reduced by using a heat sink, Pd(max) = (TJ(max) – Ta) / ӨJA. 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, IGND = IIN - IOUT for fix output voltage, , IGND = IIN - IOUT +10mA for fix reference output voltage in full load regulation. Note 7: VREF ≤ VOUT ≤ (VIN – 1V), 2.25V ≤ VIN ≤ 16V, 10mA ≤ IL ≤ 1.0A. o Note 8: Output voltage temperature coefficient is ΔVOUT (worse cast) / (TJ(max) – TJ(MIN)) where is TJ(max) +125 C and o TJ(MIN) is 0 C. Note 9: For adjustable device and fixed device with VOUT > 2.25V. 2/7 Version: D08 TS39154 1.5A Ultra Low LDO with Enable Pin Description Pin Configuration Pin Description Enable Input TTL/COMS compatible input. Logic high is enable; logic low or open is shutdown Unregulated input: +16V maximum supply Ground Output Ground: Ground pin and TAB / heat sink are internally connected. Regulator output Feed Back (adjustable) Adjustment input: Feedback input. Connect to resistive voltage-divider network. Functional Diagram Application Information The TS39154 is high performance with low dropout voltage regulator suitable for moderate to high current and voltage regulator application. Its 700mV 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 TS39154 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. Output Capacitor Requirement The TS39154 is 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. TS39154 output capacitor selection is dependent upon the ESR of the output capacitor to maintain stability. When the output capacitor is 10uF or greater, the output capacitor should have an ESR less than 2Ω. This will improve transient response as well as promote stability. Ultra low ESR capacitors (<100mΩ), such as ceramic chip capacitors, may promote instability. These very low ESR levels may cause an oscillation and/or under damped transient response. A low ESR solid tantalum capacitor works extremely well and provides good transient response and stability over temperature aluminum electrolytes can also be used, as long as the ESR of the capacitor is <2Ω. The value of the output capacitor can be increased without limit. Higher capacitance values help to improve transient response and ripple rejection and reduce output noise. 3/7 Version: D08 TS39154 1.5A Ultra Low LDO with Enable Application Information (Continue) Input Capacitor Requirement An input capacitor of 1uF or greater is recommended when the device is more than 4” away from the bulk AC supply capacitance or when the supply is a battery. Small, surface mount, ceramic chip capacitors can be used for bypassing. Larger values will help to improve ripple rejection by bypassing the input to the regulator, further improving the integrity of the output voltage. Minimum Load Current The TS39154 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 is necessary for proper regulation. Adjustable Regulator Design The TS39154 is allowed 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: Table 1: Resistor select for output voltage setting VOUT R1 R2 5V 470kΩ 155kΩ 3.3V 470kΩ 290kΩ 2.5V 470kΩ 460kΩ 1.8V 210kΩ 470kΩ 1.5V 100kΩ 470kΩ Where VOUT is 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. Enable Input TS39154 feature an active-high enable (EN) input that allows ON/OFF control of the regulator. Current drain reduces to “zero” when the device is shutdown, with only micro-amperes of leakage current. The EN input has TTL/CMOS compatible thresholds for simple interfacing with logic interfacing. EN may be directly tied to VIN and pulled up to the maximum supply voltage. 4/7 Version: D08 TS39154 1.5A Ultra Low LDO with Enable Application Information (Continue) Thermal Characteristics TS39154 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 Calculate the power dissipation of the regulator from these numbers and the device parameters from this datasheet, where the ground current is taken from data sheet. PD = (VIN – VOUT) x IOUT + VIN x IGND The heat sink thermal resistance is determined by: ӨSA = (TJ(MAX) – TA) / PD – (ӨJC + ӨCS) Where TJ(MAX) ≤ 125oC and ӨCS is between 0oC and 2oC/W. The heat sink may by significantly reduced in applications where the minimum input voltage is know and is large compared with the dropout voltage and distribute the heat between this resistor and the regulator. The low dropout properties of vertical PNP regulators allow significant reductions in regulator power dissipation and the associated heat sink without compromising performance. When this technique is employed, a capacitor of at least 1uF is needed directly between the input and regulator ground. 5/7 Version: D08 TS39154 1.5A Ultra Low LDO with Enable TO-252-4L Mechanical Drawing DIM A A1 b b1 b2 b3 C C1 C2 D D1 E E1 e H L L1 L2 L3 L4 θ θ1 TO-252-4L DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 2.210 2,387 0.087 0.093 0.010 0.127 0.000 0.005 0.584 0.660 0.023 0.026 0.559 0.635 0.022 0.025 0.500 0.510 0.020 0.020 5.232 5.436 0.206 0.214 0.509 0.559 0.020 0.022 0.457 0.533 0.018 0.021 0.483 0.584 0.019 0.023 6.000 6.200 0.236 0.244 5.415 5.515 0.213 0.217 6.400 6.604 0.252 0.260 4.902 5.004 0.193 0.197 1.27 BSC 0.05 BSC 9.601 10.21 0.377 0.402 1.397 1.651 0.055 0.065 2.743 REF 0.108 REF 0.508 REF 0.02 REF 1.100 REF 0.043 REF 0.660 0.940 0.025 0.037 0º 8º 0º 8º 7º REF 7º REF Marking Diagram Y M L = Year Code = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) = Lot Code 6/7 Version: D08 TS39154 1.5A Ultra Low LDO with Enable Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale. 7/7 Version: D08