TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
1/9 Version: B08
SOP-8
General Description
The TS39101/2/4 are 1A ultra low dropout linear voltage regulators that provide low voltage, high current output from
an extremely small package. These regulators offers extremely low dropout (typically 400mV at 1A) and very low
ground current (typically 12mA at 1A).
The TS39101/2/4 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 TS39101/2/4, the enable pin may be tied to Vin if it is not required for enable control.
Features
● Dropout voltage typically 0.4V @Io=1.0A
● Output Current up to 1A
● Low Ground Current
● Extremely Fast Transient Response
● Reversed Leakage & Reverse Battery Protection
● Error Flag Signals Output (TS39101 only)
● Current Limit & Thermal Shutdown Protection
Application
● ULDO Linear Regulator for PC add-in Cards
● PowerPCTM 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
● Portable Application
● Low-Voltage microcontrollers and Digital Logic
Part No.
Package
Packing
TS39101CSxx RL
SOP-8
2.5Kpcs / 13” Reel
TS39102CS RL
SOP-8
2.5Kpcs / 13” Reel
TS39104CS RL
SOP-8
2.5Kpcs / 13” Reel
Typical Application Circuit
TS39101 TS39102/4
Pin Definition:
TS39101CSxx
TS39102CS
TS39104CS
1. Enable
1. Enable
1. Enable
2. Input
2. Input
2. Input
3. Output
3. Output
3. Feedback
4. Flag
4. Feedback
4. Output
5.6.7.8. Ground
5.6.7.8. Ground
5.6.7.8. Ground
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
2/9 Version: B08
Absolute Maximum Rating (Note 1)
Supply Voltage
VIN
-20V ~ +20
V
Enable Voltage
VEN
+20
V
Storage Temperature Range
TSTG
-65 ~ +150
oC
Lead Soldering Temperature (260oC)
5
S
ESD
(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
W
Operating Junction Temperature Range
TJ
-40 ~ +125
oC
Thermal Resistance Junction to Case
RθJC
20
oC/W
Electrical Characteristics
VIN = VOUT + 1V, VIN =2.5V for fixed reference output voltage, Venable= 2.25V, Ta = 25oC, unless otherwise specified.
Parameter
Conditions
Min
Typ
Max
Unit
Fixed Output Voltage
10mA ≤ IL ≤ 1.0A,
Vo+1V ≤ VIN ≤ 8V
0.980|Vo|
VOUT
1.020|Vo|
V
IL=10mA
0.980|Vo|
1.020|Vo|
Fixed Reference Output Voltage
(TS39102/4)
10mA ≤ IL ≤ 1.0A,
2.5V ≤ VIN ≤ 16V
0.970|Vo|
1.24
(VREF)
1.030|Vo|
V
Line Regulation
IL=10mA, Vo+1V ≤ VIN ≤ 16V
--
0.05
0.5
%
VIN =Vout+1V, 8mA≤IL≤300mA
--
0.05
0.1
Load Regulation
VIN =Vout+1V, 10mA≤IL≤1A
--
0.2
1.0
%
Output Voltage Temp. Coefficient
--
40
100
ppm/ oC
Dropout Voltage (Note 5)
ΔVOUT = -1%
IL=100mA
IL=500mA
IL=1.0A
--
--
--
100
275
400
250
350
630
mV
Quiescent Current (Note 6)
VIN= VOUT +1V
IL=100mA
IL=500mA
IL=1.0A
--
--
--
0.7
4.0
12.0
2
6
20
mA
Current Limited
VOUT =0, VIN = VOUT +1V
--
1.8
--
A
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 (TS39101)
Output Leakage Current
VOH=16V
--
--
2
uA
Output Low Voltage (Note 9)
VIN=0.9 * VOUT, IOL=250uA
--
--
400
mV
Upper Threshold Voltage
% of VOUT
--
--
99
%
Lower Threshold Voltage
% of VOUT
93
--
--
%
Hysteresis
--
1
--
%
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
3/9 Version: B08
Electrical Characteristics (Continue)
Enable Input (TS39101/2/4)
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
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.
Note 8: Output voltage temperature coefficient is ΔVOUT (worse cast) / (TJ(max) – TJ(MIN)) where is TJ(max) +125oC and
TJ(MIN) is 0oC.
Note 9: For adjustable device and fixed device with VOUT > 2.25V.
Pin Description
Pin Configuration
Pin Description
Enable
TTL/COMS compatible input. Logic high is enable; logic low or open is shutdown
Input
Unregulated input: +16V maximum supply
Ground
Ground: Ground pin and TAB / heat sink are internally connected.
Output
Regulator output
Flag (fixed voltage)
Error Flag (output): Open-collector output. Active low indicates an output fault condition,
if no used, leave open.
Feed Back (adjustable)
Adjustment input: Feedback input. Connect to resistive voltage-divider network.
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
4/9 Version: B08
Functional Diagram
TS39101 Fixed Regulator with Flag and Enable Block Diagram
TS39102/4 Adjustable Regulator Block Diagram
Application Information
The TS39101/2/4 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 TS39101/2/4 s 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.
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
5/9 Version: B08
Application Information (Continue)
Output Capacitor Requirement
The TS39101/2/4 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. TS39101/2/4
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.
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 TS39101/2/4 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 adjustable regulator versions (TS39102/4) is allow 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:
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
TS39101/2/4 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.
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
6/9 Version: B08
Application Information (Continue)
Error Flag
TS39101 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:
Thermal Resistance
Power SOP-8 Thermal Characteristic
TS39101/2/4 series performance is its power SOP-8 package featuring half the thermal resistance of a standard SOP-
8 package. Lower thermal resistance means more output current or higher input voltage for a standard SOP-8
package. Lower thermal resistance means more output current or higher input voltage for a given package size.
Lower thermal resistance is achieved by connect the four ground pins with the die attached pad to create a single
piece electrical and thermal conductor. This concept have been used by MOSFET production for years, proving very
reliable and cost effective for the user. As above thermal resistance figure. Thermal resistance consists of two main
elements, ΘJC (junction to case) and ΘCA (case to ambient). Using the power SOP-8 reduces ΘCA, the total thermal
resistance, ΘJA (junction to ambient) is the limiting factor in calculating the maximum power dissipation capability of the
device. Typically, the power SOP-8 have a ΘJC of 20oC/W dramatically , this is significantly lower than the standard
SOP-8 which is typically 75oC/W. ΘCA is reduced because pin 5~8 can be soldered directly to a ground plane which
significantly reduces the case to sink and sink to ambient thermal resistance.
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
7/9 Version: B08
Application Information (Continue)
Transient Response and 3.3V to 2.5V or 2.5V to 1.8V Conversion
TS39101/2/4 has excellent transient response to variations in input voltage and load current. The device have been
designed to respond quickly to load current variations and input voltage variations. Large output capacitors are not
required to obtain this performance. A standard 10uF 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 TS39101/2/4 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
From under curves, the minimum area of copper necessary for the par to operate safely can be determined. The
maximum allowable temperature rise must be calculated to determine operation along which curve.
Copper area lay out information
Determine the power dissipation requirements for the design along with the maximum ambient temperature at which
the device will be operated. Refer to power dissipation with copper area curve, which shows safe operating curves for
three different ambient temperatures with 25oC, 50oC, 85oC. From these curves, the minimum amount of copper can
be determined by knowing the maximum power dissipation required.
PD = (VIN- VOUT) * IOUT + VIN * IGND
If we used a 5.0V output device and a 6V input at an output current of 350mA, then the power dissipation is as follows:
PD = (6.0V- 5.0V) * 350mA + 5V * 4mA
PD = 350mW + 20mW
PD = 370mW
If the maximum ambient temperature is 85oC and the power dissipation is as above 375mW, the curve is shows that
the required area of copper is 80mm2.
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
8/9 Version: B08
SOP-8 Mechanical Drawing
Marking Diagram
Y
= Year Code
M
= 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)
L
= Lot Code
XX
= Output Voltage
(18=1.8V, 25=2.5V, 33=3.3V, 50=5V)
TS39102 / TS39104
Y
= Year Code
M
= 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)
L
= Lot Code
SOP-8 DIMENSION
MILLIMETERS
INCHES
DIM
MIN
MAX
MIN
MAX.
A
4.80
5.00
0.189
0.196
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.054
0.068
D
0.35
0.49
0.014
0.019
F
0.40
1.25
0.016
0.049
G
1.27BSC
0.05BSC
K
0.10
0.25
0.004
0.009
M
0º
7º
0º
7º
P
5.80
6.20
0.229
0.244
R
0.25
0.50
0.010
0.019
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
9/9 Version: B08
Notice
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assumes no responsibility or liability for any errors or inaccuracies.
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