TS39100
1A Ultra Low Dropout Voltage Regulator
SOT-223
TO-252
(DPAK)
Pin Definition:
1. Input
2. Ground (tab)
3. Output
General Description
The TS39100 are 1A 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 1A) and very low
ground current (typically 17mA at 1A).
The TS39100 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.
Features
●
●
●
●
●
●
Dropout voltage typically 0.4V @Io=1A
Output Current up to 1A
Low Ground Current
Extremely Fast Transient Response
Reversed Leakage & Reverse Battery Protection
Current Limit & Thermal Shutdown Protection
Ordering Information
Part No.
Package
Packing
TS39100CWxx RP
SOT-223 2.5Kpcs / 13” Reel
TS39100CWxx RPG
SOT-223 2.5Kpcs / 13” Reel
TS39100CPxx RO
TO-252
2.5Kpcs / 13” Reel
TS39100CPxx ROG
TO-252
2.5Kpcs / 13” Reel
Note: Where
xx
denotes voltage option, available are
18=1.8V, 25=2.5V, 33=3.3V, 50=5.0V
“G” denote for Halogen Free
Application
ULDO Linear Regulator for PC add-in Cards
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
●
Portable Application
●
Low-Voltage microcontrollers and Digital Logic
●
●
●
●
●
●
●
Typical Application Circuit
Absolute Maximum Rating
(Note 1)
Parameter
Supply Voltage
Operation Input Voltage
Power Dissipation (Note 4)
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260 C)
ESD
o
Symbol
V
IN
V
IN
(operate)
P
D
T
J
T
STG
Value
-20V ~ +20
+2.25 ~ +16
Internally Limited
-40 ~ +125
-65 ~ +150
5
(Note 3)
Units
V
V
W
o
o
C
C
S
1/7
Version: C11
TS39100
1A Ultra Low Dropout Voltage Regulator
Electrical Characteristics
Parameter
Conditions
10mA
≤
I
L
≤
1.0A,
Output Voltage
Vo+1V
≤
V
IN
≤
8V
10mA
≤
I
L
≤
1.0A,
2.5V
≤
V
IN
≤
16V
Line Regulation
Load Regulation
I
L
=10mA, Vo+1V
≤
V
IN
≤
16V
V
IN
=Vout+1V, 8mA≤I
L
≤300mA
V
IN
=Vout+1V, 10mA≤I
L
≤1A
V
IN
= V
OUT
+ 1V, V
IN
=2.5V for fixed reference output voltage, Venable= 2.25V, Ta = 25 C, unless otherwise
specified.
o
Min
0.980|Vo|
Typ
Max
1.020|Vo|
Unit
V
V
%
%
ppm/
o
V
OUT
0.970|Vo|
--
--
--
--
0.05
0.05
0.2
40
100
275
400
0.7
6
17
1.8
1.030|Vo|
0.5
0.1
1.0
100
250
350
630
--
--
23
--
A
mA
mV
Output Voltage Temp. Coefficient
I
L
=100mA
Dropout Voltage (Note 5)
∆V
OUT
= -1%
I
L
=500mA
I
L
=1.0A
I
L
=100mA
Quiescent Current (Note 6)
Current Limited
V
IN
= V
OUT
+1V
I
L
=500mA
I
L
=1.0A
V
OUT
=0, V
IN
= V
OUT
+1V
C
--
--
--
--
--
--
--
Thermal Performance
Condition
Thermal Resistance Junction to Case
Package type
SOT-223
Typ
15
Unit
o
TO-252
10
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, T
J
, the
junction to ambient thermal resistance,
Ө
JA
, 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
Ө
JA
can be reduced by using a heat sink, Pd
(max)
= (T
J(max)
– Ta) /
Ө
JA
.
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, I
GND
= I
IN
- I
OUT
for fix output voltage, , I
GND
= I
IN
- I
OUT
+10mA for fix reference output voltage in full load regulation.
o
Note 8: Output voltage temperature coefficient is
∆V
OUT
(worse cast) / (T
J(max)
– T
J(MIN)
) where is T
J(max)
+125 C and
o
T
J(MIN)
is 0 C.
C/W
2/7
Version: C11
TS39100
1A Ultra Low Dropout Voltage Regulator
Functional Diagram
Application Information
The TS39100 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 V
CE
saturation voltage.
The TS39100 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 TS39100 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. TS39100
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 TS39100 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.
3/7
Version: C11
TS39100
1A Ultra Low Dropout Voltage Regulator
Application Information (Continue)
Transient Response and 3.3V to 2.5V or 2.5V to 1.8V Conversion
TS39100 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 TS39100 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.
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
o
o
o
curves for three different ambient temperatures with 25 C, 50 C, 85 C. From these curves, the minimum amount of
copper can be determined by knowing the maximum power dissipation required.
P
D
= (V
IN
- V
OUT
) * I
OUT
+ V
IN
* I
GND
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:
P
D
= (6.0V- 5.0V) * 350mA + 5V * 4mA
P
D
= 350mW + 20mW
P
D
= 370mW
If the maximum ambient temperature is 85 C and the power dissipation is as above 375mW, the curve is shows
2
that the required area of copper is 80mm .
o
4/7
Version: C11
TS39100
1A Ultra Low Dropout Voltage Regulator
TO-252 Mechanical Drawing
DIM
A
A1
B
C
D
E
F
G
G1
G2
H
I
J
K
L
M
TO-252 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
2.3BSC
0.09BSC
4.6BSC
0.18BSC
6.80
7.20
0.268
0.283
5.40
5.60
0.213
0.220
6.40
6.65
0.252
0.262
2.20
2.40
0.087
0.094
0.00
0.20
0.000
0.008
5.20
5.40
0.205
0.213
0.75
0.85
0.030
0.033
0.55
0.65
0.022
0.026
0.35
0.65
0.014
0.026
0.90
1.50
0.035
0.059
2.20
2.80
0.087
0.110
0.50
1.10
0.020
0.043
0.90
1.50
0.035
0.059
1.30
1.70
0.051
0.67
Marking Diagram
XX
Y
M
= Output Voltage
(18=1.8V,
25=2.5V, 33=3.3V, 50=5V)
= 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)
= Month Code for Halogen Free Product
(O=Jan,
P=Feb, Q=Mar, R=Apl, S=May, T=Jun, U=Jul, V=Aug, W=Sep,
X=Oct, Y=Nov, Z=Dec)
= Lot Code
L
5/7
Version: C11
