TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
SOP-8
Pin Definition:
TS39101CSxx
1. Enable
2. Input
3. Output
4. Flag
5.6.7.8. Ground
TS39102CS
1. Enable
2. Input
3. Output
4. Feedback
5.6.7.8. Ground
TS39104CS
1. Enable
2. Input
3. Feedback
4. Output
5.6.7.8. Ground
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
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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
●
●
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●
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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
TS39101
TS39102/4
Document Number: DS_P0000269
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Ordering Information
Part No.
Package
1
Packing
TS39101CSxx RLG
SOP-8
2.5Kpcs / 13” Reel
TS39102CS RLG
SOP-8
2.5Kpcs / 13” Reel
TS39104CS RLG
SOP-8
2.5Kpcs / 13” Reel
Note: “G” denotes for Halogen Free
Where
xx
denotes voltage option, available are
18=1.8V
25=2.5V
33=3.3V
50=5.0V
Leave blank for adjustable version (TS39102/4)
Contact to factory for addition output voltage option.
Version: C15
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
Absolute Maximum Rating
(Note 1)
Supply Voltage
Enable Voltage
Storage Temperature Range
Lead Soldering Temperature (260°C)
ESD
V
IN
V
EN
T
STG
-20V ~ +20
+20
-65 ~ +150
5
(Note 3)
V
V
°C
S
Operating Rating
(Note 2)
Operation Input Voltage
Operation Enable Voltage
Power Dissipation (Note 4)
Operating Junction Temperature Range
Thermal Resistance Junction to Case
V
IN
(operate)
V
EN
(operate)
P
D
T
J
Rθ
JC
+2.25 ~ +16
+2.25 ~ +16
Internally Limited
-40 ~ +125
20
V
V
W
°C
°C
/W
Electrical Characteristics
Parameter
V
IN
= V
OUT
+ 1V, V
IN
=2.5V for fixed reference output voltage, Venable= 2.25V, Ta = 25°C, unless otherwise specified.
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Conditions
Min
Typ
Max
10mA
≤
I
L
≤
1.0A,
Vo+1V
≤
V
IN
≤
8V
0.980|Vo|
V
OUT
I
L
=10mA
10mA
≤
I
L
≤
1.0A,
2.5V
≤
V
IN
≤
16V
I
L
=10mA, Vo+1V
≤
V
IN
≤
16V
V
IN
=Vout+1V, 8mA≤I
L
≤300mA
V
IN
=Vout+1V, 10mA≤I
L
≤1A
0.980|Vo|
0.970|Vo|
--
--
--
--
--
--
--
--
--
--
--
--
--
--
1.24
(V
REF
)
0.05
0.05
0.2
40
100
275
400
0.7
4.0
12.0
1.8
40
20
0.1
--
--
--
--
1
I
L
=100mA
∆V
OUT
= -1%
I
L
=500mA
I
L
=1.0A
I
L
=100mA
V
IN
= V
OUT
+1V I
L
=500mA
I
L
=1.0A
V
OUT
=0, V
IN
= V
OUT
+1V
(Note 8)
0.5
0.1
1.0
100
250
350
630
2
6
20
--
120
--
--
V
OH
=16V
V
IN
=0.9 * V
OUT
, I
OL
=250uA
% of V
OUT
% of V
OUT
--
--
--
93
--
2
400
99
--
--
2
Unit
V
Fixed Output Voltage
1.020|Vo|
1.020|Vo|
Fixed Reference Output Voltage
(TS39102/4)
Line Regulation
1.030|Vo|
V
%
%
ppm/°C
mV
Load Regulation
Output Voltage Temp. Coefficient
Dropout Voltage (Note 5)
Quiescent Current (Note 6)
mA
A
nA
ppm/°C
nA/°C
uA
mV
%
%
%
Current Limited
Adjust Pin Bias Current
Reference Voltage Temp. Coefficient
Adjust Pin Bias Current Temp. Coefficient
Flag Output (TS39101)
Output Leakage Current
Output Low Voltage (Note 9)
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Document Number: DS_P0000269
Version: C15
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
Electrical Characteristics (Continue)
Enable Input (TS39101/2/4)
Low (OFF)
--
High (ON)
2.25
V
EN
=2.25V
--
Enable Pin Input Current
V
EN
=0.8V
--
Note 1: Absolute Maximum Rating is limits beyond which damage to the device
specifications and test conditions see the Electrical Characteristics.
Note 2: The device is not guaranteed to operate outside its operating rating.
Input Logic Voltage
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.
Note 7: V
REF
≤
V
OUT
≤
(V
IN
– 1V), 2.25V
≤
V
IN
≤
16V, 10mA
≤
I
L
≤
1.0A.
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.
Note 9: For adjustable device and fixed device with V
OUT
> 2.25V.
o
--
0.8
V
--
--
--
75
uA
--
4
may occur. For guaranteed
Pin Description
Enable
Input
Ground
Output
Pin Configuration
Flag
(fixed voltage)
Feed Back
(adjustable)
Document Number: DS_P0000269
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Pin Description
3
TTL/COMS compatible input. Logic high is enable; logic low or open is shutdown
Unregulated input: +16V maximum supply
Ground: Ground pin and TAB / heat sink are internally connected.
Regulator output
Error Flag (output): Open-collector output. Active low indicates an output fault condition,
if no used, leave open.
Adjustment input: Feedback input. Connect to resistive voltage-divider network.
Version: C15
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
Functional 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 V
CE
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.
Document Number: DS_P0000269
TS
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TS39101 Fixed Regulator with Flag and Enable Block Diagram
TS39102/4 Adjustable Regulator Block Diagram
4
Version: C15
TS39101/2/4
1A Ultra Low Dropout Voltage Regulator
with Multi-Function
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 V
OUT
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 V
IN
and pulled
up to the maximum supply voltage.
Document Number: DS_P0000269
TS
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Version: C15
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