TS39301/2/3/4 3A Ultra Low Dropout Positive Voltage Regulator Low Dropout Voltage 0.4V (typ.) Output Current 3A Low Quiescent Current General Description The TS39301/2/3/4 are 3A ultra low dropout linear voltage regulators that provide low voltage, high current output with a minimum of external components. The TS39301/2/3/4 offers extremely low dropout (typically 400mV at 3A) and low quiescent current (typically 36mA at 3A). The TS39301/2/3/4 is ideal for PC add-in cards that need to convert from standard 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the TS39301/2/3/4 to provide 2.5V from a supply as low as 3V, and 1.8V from a supply as low as 2.5V. The TS39301/2/3/4 also has fast transient response for heavy switching applications. The device requires only 47uF of output capacitor to maintain stability and achieve fast transient response. On the TS39301/2/3/4, the enable pin may be tied to input voltage 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=3A Output current up to 3A TS39301CZ5xx Low ground current TS39302CZ5 Current limiting and Thermal shutdown TS39303CZ5xx Extremely fast transient response TS39304CZ5xx Reversed leakage protection Reverse battery protection TTL/CMOS compatible enable pin Error flag output (TS39301 only) Adjustable version (TS39302 only) 50 = 5.0V Output voltage sense (TS39303 / 4 only) 33 = 3.3V Part No. TS39301CM5xx Operating Temp. Package TO-220-5L o -40 ~ +125 C TS39302CM5 TO-263-5L TS39303CM5xx TS39304CM5xx Note: Where xx denotes voltage option, available are 25 = 2.5V 18 = 1.8V 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 power supplies Low-voltage microcontrollers and digital logic Multimedia and PC processor supplies SMPS post regulator TS39301/2/3/4 1-7 2005/12 rev. A Absolute Maximum Rating (Note 1) Supply Voltage Vin -20V ~ +20 Enable Voltage Ven +20 Storage Temperature Range TSTG V -65 ~ +150 o Lead Soldering Temperature (260 C) 5 ESD V o C S (Note 3) Operating Rating (Note 2) Operation Input Voltage Vin (operate) +2.5 ~ +16 V Operation Enable Voltage Ven (operate) +16 V Power Dissipation (Note 4) PD Internally Limited W Operating Junction Temperature Range TJ -40 ~ +125 o C Electrical Characteristics o (Vin = Vout + 1V, Venable= 2.4V, Tj = 25 C, unless otherwise specified.) Parameter Output Voltage Output Voltage Conditions IL=10mA Min 0.990|Vo| 10mA ≤ IL ≤ 3A, Vo+1V ≤ Vin ≤ 8V Typ 5.0 / 3.3 Max Unit 1.010|Vo| 0.980|Vo| 2.5 / 1.8 1.020|Vo| V Line Regulation IL=10mA, Vo+1V ≤Vin≤ 8V -- 0.06 0.5 % Load Regulation Vin=Vout+1V, 10mA≤IL≤3A -- 0.2 1.0 % Output Voltage Temp. Coefficient (Note 5) -- 40 100 ppm/ C IL=100mA -- 65 200 IL=750mA -- 185 -- IL=1.5A -- 250 -- IL=3.0A -- 400 550 IL=100mA -- 6 10 IL=750mA -- 10 20 IL=1.5A -- 17 -- IL=3.0A -- 45 -- Vout=0, Vin=Vout+1V -- 4.5 -- Low (OFF) -- -- 0.8 High (ON) 2.25 -- -- VEN=2.25V -- -- 75 VEN =0.8V -- -- 4 -- -- 20 µA 0.980|Vo| 1.24 1.020|Vo| V Dropout Voltage (Note 6 & 8) Quiescent Current (Note 7) Current Limited ΔVout= -1% Vin=Vout+1V o mV mA A Enable Input (TS39301/2/3/4) Input Logic Voltage Enable Pin Input Current Shutdown Output Current (Note 8) V µA Adjustable Output (TS39302) Reference Voltage TS39301/2/3/4 2-7 2005/12 rev. A Electrical Characteristics Flag Output (TS39301) Output Leakage Current VOH=16V -- -- 2 µA Output Low Voltage (Note 9) Vin=2.5V, IOL=250uA -- -- 400 mV Upper Threshold Voltage % of Vout -- -- 99 % Lower Threshold Voltage % of Vout 93 -- -- % -- 1 -- % Hysteresis Thermal Performance Condition Package type Typ Thermal Resistance TO-220-5L 2 Junction to Case TO-263-5L 2 Unit o C/W Note 1. Exceeding the absolute maximum ratings may be damaged the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Note 4. Pd(max) = (Tj(max) - Ta) + Өja, where Өja depends upon the printed circuit layout. See ”Applications Information”. o Note 5. Output voltage temperature coefficient is ΔVout (worst case) + (Tj(max) – Tj(min)) where Tj(max) is +125 C and o Tj(min) is -40 C. Note 6. Vdrop = Vin - Vout when Vout decreases to 99% of its nominal output voltage with Vin = Vout + 1. For output voltages below 2.5V, dropout voltage is the input-to-output voltage differential with the minimum input voltage being 2.5V. Minimum input operating voltage is 2.5V Note 7. Ignd is the quiescent current. Iin = Ignd + Iout Note 8. Ven<0.8V, Vin<8V and Vout=0 Note 9. For 1.8V device, Vin = 2.25V (device is in dropout) Block Diagram TS3930x series * Feedback network is fixed output versions only (TS39301 & TS39303 & TS39304) ** Adjustable output version only (TS39302) TS39301/2/3/4 3-7 2005/12 rev. A Pin Assignment Pin No. TS39301 TS39302 TS39303 Pin Configuration TS39304 1 1 1 2 Enable 2 2 2 1 Input 3 3 3 3 Ground 4 4 4 5 Output 5 Flag 5 Adjust 5 4 Sense Pin Description TTL/COMS compatible input. Logic high is enable; logic low or open is shutdown Unregulated input: +16V maximum supply Ground pin and TAB/heatsink are internally connected. Regulator output Open-collector output. Active low indicates an output fault condition. Feedback input. Connect to resistive voltage-divider network. Sense pin is the input to the error amplifier Typical Application Circuit TS39301 TS39302 TS39303 / 4 TS39301/2/3/4 4-7 2005/12 rev. A Application Information Application Information The value of the output capacitor can be increased The TS39300/1/2/3/4 series are high performance with without limit. Higher capacitance values help to low dropout voltage regulator suitable for moderate to improve transient response and ripple rejection and high current and voltage regulator application. Its 630mV dropout voltage at full load and over temperature makes it especially valuable in battery reduce output noise. Input Capacitor Requirement power systems and as high efficiency noise filters in An input capacitor of 1uF or greater is recommended post NPN when the device is more than 4” away from the bulk transistor design, where the base to emitter voltage AC supply capacitance or when the supply is a battery. drop and collector to emitter saturation voltage limit the Small, surface mount, ceramic chip capacitors can be minimum dropout voltage, dropout performance of the used for bypassing. Larger values will help to improve PNP output of these devices is limited only by low Vce ripple rejection by bypassing the input to the regulator, saturation voltage. further improving the integrity of the output voltage. The TS39300/1/2/3/4 series is fully protected from Minimum Load Current regulator applications. Unlike normal damage due to fault conditions. Linear current limiting is provided. Output current during overload conditions is The TS39130/1/2/3/4 series is specified between finite constant. Thermal shutdown the device when the die loads. If the output current is too small leakage temperature exceeds the maximum safe operating currents dominate and the output voltage rises. A temperature. Transient protection allows device survival 10mA minimum load current is necessary for proper even when the input voltage spikes above and below regulation. nominal. The output structure of these regulators allows Adjustable Regulator Design voltages in excess of the desired output voltage to be applied without reverse current flow. to programming the output voltage anywhere between Output Capacitor Requirement The TS39300/1/2/3/4 series requires The adjustable regulator versions (TS39302) is allow 1.25 and the 16V maximum operating rating of the an output family. capacitor to maintain stability and improve transient Two resistors are used. Resistors can be quite large response is necessary. The value of this capacitor is up to 1MΩ, because of the very high input impedance dependent upon the output current, lower currents allow and low bias current of the sense comparator, the smaller capacitors. TS39300/1/2/3/4 series output resistor values are calculated by: capacitor selection is dependent upon the ESR of the R1 = R2 * [(Vout / 1.24) – 1] output capacitor to maintain stability. When the output capacitor is 47uF or greater, the output capacitor should have an ESR less than 1Ω. This will improve transient response as well as promote stability. Ultra low ESR capacitors, 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 <1Ω. TS39301/2/3/4 5-7 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. 2005/12 rev. A Application Information (continues) Error Flag The device have been designed to respond quickly to TS39301 versions feature an Error Flag, which looks load current variations and input voltage variations. at the output voltage and signals an error condition Large output capacitors are not required to obtain this when this voltage drops 5% below its expected value. performance. A standard 47uF output capacitor, The error flag is an open-collector output that pulls low preferably tantalum, is all that is required. Larger values under fault conditions. It may sink 10mA. Low output help to improve performance even further. voltage signifies a number of possible problems, By virtue of its low dropout voltage, this device does not including an over-current fault (the device is in current saturate into dropout as readily as similar NPN base limit) or low input voltage. The flag output is designs. When converting from 3.3V to 2.5V or 2.5V to inoperative during over temperature shutdown 1.8V, the NPN based regulators are already operating conditions. A pull-up resistor from error flag to either in dropout, with typical dropout requirements of 1.2V or Vin or Vout is required for proper operation. For greater,. To convert down to 2.5V or 1.8V without information regarding the minimum and maximum values of pull-up resistance, refer the graph as follow: operating in dropout, NPN based regulators require an input voltage of 3.7V at the very least. The TS39300 series regulator will provide excellent performance with an input as low as 3.0V or 2.5V respectively. This gives the PNP based regulators a distinct advantage over older, NPN based linear regulators. Power Dissipation Determine the power dissipation requirements for the design along with the maximum ambient temperature at which the device will be operated. Pd = (Vin- Vout) * Iout + Vin * Ignd The heat sink thermal resistance is determined by: When the error flag is not used, it is best to leave it open, the error flag pin can be tied directly to output Pin. Enable Input Өsa = [Tj(max) – Ta] / Pd – (Өjc + Өcs) o o Current drain reduces to “zero” when the device is When Tj(max) < 125 C, and Өcs is between 0 C and 2 o C/W, the heat sink may be significantly reduced in applications where the input voltage is known and large compare with the dropout voltage. shutdown, with only micro-amperes of leakage current. Output Sense TS39301/2/3/4 versions feature an active-high enable (EN) input that allows ON/OFF control of the regulator. 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. Sense pin can be connect to the load and traces the load voltage, TS39303/4 will adjust the output voltage to maintain the load at expected voltage. Transient Response and 3.3V to 2.5V or 2.5V to 1.8V Conversion TS39301/2/3/4 has excellent transient response to variations in input voltage and load current. TS39301/2/3/4 6-7 2005/12 rev. A TO-220-5L Mechanical Drawing A B G H H C C A G B M N M N L L I F I F E D E D K K J J TO-220-5L DIMENSION DIM MILLIMETERS INCHES 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 TO-263-5L DIMENSION DIM TS39301/2/3/4 7-7 MILLIMETERS INCHES 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 2005/12 rev. A