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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
Dropout voltage typically 0.4V @Io=3A Output current up to 3A Low ground current Current limiting and Thermal shutdown Extremely fast transient response Reversed leakage protection Reverse battery protection TTL/CMOS compatible enable pin Error flag output (TS39301 only) Adjustable version (TS39302 only) Output voltage sense (TS39303 / 4 only)
Ordering Information
Part No.
TS39301CZ5xx TS39302CZ5 TS39303CZ5xx TS39304CZ5xx TS39301CM5xx TS39302CM5 TS39303CM5xx TS39304CM5xx Note: Where xx denotes voltage option, available are 50 = 5.0V 33 = 3.3V 25 = 2.5V 18 = 1.8V -40 ~ +125 C
o
Operating Temp.
Package
TO-220-5L
TO-263-5L
Applications
Battery power equipment LDO linear regulator for PC add-in cards PowerPC
TM

High efficiency linear power supplies High efficiency post regulator for switching supply Low-voltage microcontrollers and digital logic SMPS post regulator
power supplies
Multimedia and PC processor supplies
TS39301/2/3/4
1-7
2005/12 rev. A
Absolute Maximum Rating (Note 1)
Supply Voltage Enable Voltage Storage Temperature Range Lead Soldering Temperature (260 C) ESD
o
Vin Ven TSTG
-20V ~ +20 +20 -65 ~ +150 5 (Note 3)
V V
o
C
S
Operating Rating (Note 2)
Operation Input Voltage Operation Enable Voltage Power Dissipation (Note 4) Operating Junction Temperature Range Vin (operate) Ven (operate) PD TJ +2.5 ~ +16 +16 Internally Limited -40 ~ +125 V V W
o
C
Electrical Characteristics
(Vin = Vout + 1V, Venable= 2.4V, Tj = 25 C, unless otherwise specified.)
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Parameter
Output Voltage Output Voltage Line Regulation Load Regulation Output Voltage Temp. Coefficient
Conditions
IL=10mA 10mA IL 3A, Vo+1V Vin 8V IL=10mA, Vo+1V Vin 8V Vin=Vout+1V, 10mAIL3A (Note 5) IL=100mA
Min
0.990|Vo| 0.980|Vo| -------------
Typ
5.0 / 3.3 2.5 / 1.8 0.06 0.2 40 65 185 250 400 6 10 17 45 4.5
Max
1.010|Vo| 1.020|Vo| 0.5 1.0 100 200 --550 10 20 ----
Unit
V
% % ppm/ C
o
Dropout Voltage (Note 6 & 8)
Vout= -1%
IL=750mA IL=1.5A IL=3.0A IL=100mA
mV
Quiescent Current (Note 7)
Vin=Vout+1V
IL=750mA IL=1.5A IL=3.0A
mA
Current Limited
Vout=0, Vin=Vout+1V
A
Enable Input (TS39301/2/3/4)
Input Logic Voltage Low (OFF) High (ON) VEN=2.25V VEN =0.8V -2.25 --------0.8 -75 4 20 V
Enable Pin Input Current Shutdown Output Current (Note 8)
A A
Adjustable Output (TS39302)
Reference Voltage 0.980|Vo| 1.24 1.020|Vo| V
TS39301/2/3/4
2-7
2005/12 rev. A
Electrical Characteristics
Flag Output (TS39301)
Output Leakage Current Output Low Voltage (Note 9) Upper Threshold Voltage Lower Threshold Voltage Hysteresis VOH=16V Vin=2.5V, IOL=250uA % of Vout % of Vout ---93 -----1 2 400 99 --A mV % % %
Thermal Performance
Condition
Thermal Resistance Junction to Case
Package type
TO-220-5L TO-263-5L
Typ
2 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) + ja, where ja depends upon the printed circuit layout. See "Applications Information". o Note 5. Output voltage temperature coefficient is Vout (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 1 2 3 4 5 TS39302 1 2 3 4 TS39303 1 2 3 4 TS39304 2 1 3 5
Pin Configuration
Enable Input Ground Output Flag
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
5 5 4
Adjust Sense
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 low dropout voltage regulator suitable for moderate to high current and voltage regulator application. Its 630mV 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 TS39300/1/2/3/4 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. The TS39130/1/2/3/4 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 is necessary for proper regulation. without limit. Higher capacitance values help to improve transient response and ripple rejection and reduce output noise.
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
Adjustable Regulator Design
The adjustable regulator versions (TS39302) is allow to programming the output voltage anywhere between 1.25 and the 16V maximum operating rating of the
Output Capacitor Requirement
The TS39300/1/2/3/4 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. TS39300/1/2/3/4 series output capacitor selection is dependent upon the ESR of the output capacitor to maintain stability. When the output capacitor is 47uF or greater, the output capacitor should have an ESR less than 1. 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 <1.
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 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.
TS39301/2/3/4
5-7
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 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) or low input voltage. The flag output is inoperative during over temperature shutdown conditions. A pull-up resistor from error flag to either Vin or Vout is required for proper operation. For information regarding the minimum and maximum values of pull-up resistance, refer the graph as follow: load current variations and input voltage variations. Large output capacitors are not required to obtain this performance. A standard 47uF output capacitor, preferably tantalum, is all that is required. Larger values help to improve performance even further. By virtue of its low dropout voltage, this device does not saturate into dropout as readily as similar NPN base designs. When converting from 3.3V to 2.5V or 2.5V to 1.8V, the NPN based regulators are already operating in dropout, with typical dropout requirements of 1.2V or greater,. To convert down to 2.5V or 1.8V without 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. sa = [Tj(max) - Ta] / Pd - (jc + cs) When Tj(max) < 125 C, and cs 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.
o o
Enable Input
TS39301/2/3/4 versions 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.
Output Sense
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
A
B
C
G
B
C
H M N L
N L
G H
DIM A B C D E
TO-220-5L DIMENSION MILLIMETERS 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 INCHES 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
I
F
I
G H I J
F
F
K L M
K E D E
D
K J
N
J
TO-263-5L Mechanical Drawing
TO-263-5L DIMENSION DIM A B C D E F G H I J MILLIMETERS MIN 10.220 14.600 0.750 1.573 4.560 1.240 2.280 0.280 8.240 1.540 MAX 10.260 15.870 0.770 1.827 4.570 1.270 2.790 0.320 8.280 1.800 INCHES MIN 0.402 0.575 0.030 0.062 0.179 0.049 0.090 0.011 0.324 0.060 MAX 0.404 0.625 0.030 0.072 0.180 0.050 0.110 0.013 0.326 0.071
TS39301/2/3/4
7-7
2005/12 rev. A

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