TS39500/1/2/3
5A Ultra Low Dropout Positive Voltage Regulator
TO-220
TO-263
2
(D PAK)
TO-220-5L
TO-263-5L
2
(D PAK)
Pin Definition:
TS39500
1. Input
2. Ground (tab)
3. Output
Pin Definition:
TS39501xx TS39502
1. Enable
1. Enable
2. Input
2. Input
3. Ground
3. Ground
4. Output
4. Output
5. Flag
5. Adjust
TS39503xx
1. Enable
2. Input
3. Ground
4. Output
5. Sense
General Description
TS39500/1/2/3 are 5A ultra low dropout linear voltage regulators that provide low voltage, high current output with a
minimum of external components. TS39500/1/2/3 offers extremely low dropout (typically 400mV at 5A) and low
quiescent current (typically 36mA at 5A).
TS39500/1/2/3 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 TS39501/2/3/4 to provide
2.5V from a supply as low as 3V, and 1.8V from a supply as low as 2.5V. TS39500/1/2/3 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 TS39500/1/2/3, the enable pin may be tied to input voltage if it is not required for enable control.
Features
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Dropout voltage typically 0.4V @ Io=5A
Output Current up to 5A
Low Ground Current
Extremely Fast Transient Response
Current Limit & Thermal Shutdown
Reversed Leakage & Reverse Battery Protection
Error Flag Signals Output (TS39501 only)
Adjustable Version (TS39502 only)
Output Voltage Sense (TS39503/4 only)
TM
Ordering Information
Part No.
Package
Packing
TS39500CZxx C0
TO-220
50pcs / Tube
TS39500CMxx RN
TO-263
800pcs / 13” Reel
TS39501CZ5xx C0
TO-220-5L
50pcs / Tube
TS39501CM5xx RN TO-263-5L
800pcs / 13” Reel
TS39502CZ5 C0
TO-220-5L
50pcs / Tube
TS39502CM5 RN
TO-263-5L
800pcs / 13” Reel
TS39503CZxx C0
TO-220-5L
50pcs / Tube
TS39503CMxx RN
TO-263-5L
800pcs / 13” Reel
Note: Where
xx
denotes voltage option, available are
50=5V, 33=3.3V, 25=2.5V, 18=1.8V
Contact to factory for addition output voltage option.
Application
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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
Low Voltage Microcontrollers and Digital Logic
1/12
Version: A07
TS39500/1/2/3
5A Ultra Low Dropout Positive Voltage Regulator
Absolute Maximum Rating
(Note 1)
Supply Voltage
Enable Voltage
Storage Temperature Range
Lead Soldering Temperature (260 C)
ESD
o
V
IN
V
EN
T
STG
-20V ~ +20
+20
-65 ~ +150
5
(Note 3)
V
o
V
C
S
Operating Rating
(Note 2)
Operation Input Voltage
Operation Enable Voltage
Power Dissipation (Note 4)
Operating Junction Temperature Range
V
IN
(operate)
V
EN
(operate)
P
D
T
J
+2.25 ~ +16
+2.25 ~ +16
Internally Limited
-40 ~ +125
o
V
V
W
o
C
Electrical Characteristics
V
IN
= V
OUT
+ 1V, V
IN
=2.5V for fixed reference output voltage, Venable= 2.25V, Ta = 25 C, unless otherwise specified.
Parameter
Fixed Output Voltage
Fixed Reference Output Voltage
Fixed Reference Output Voltage
Line Regulation
Load Regulation
Output Voltage Temp. Coefficient
Dropout Voltage (Note 5)
Conditions
10mA
≤
I
L
≤
5A,
Vo+1V
≤
V
IN
≤
8V
I
L
=10mA
10mA
≤
I
L
≤
5A,
2.5V
≤
V
IN
≤
8V
I
L
=10mA, Vo+1V
≤
V
IN
≤
8V
V
IN
=Vout+1V, 10mA≤I
L
≤5A
I
L
=100mA
I
L
=750mA
Δ
V
OUT
= -1%
I
L
=1.5A
I
L
=5A
I
L
=100mA
I
L
=750mA
V
IN
= V
OUT
+1V
I
L
=1.5A
I
L
=5A
V
OUT
=0, V
IN
=V
OUT
+1V
Min
0.980|Vo|
0.980|Vo|
0.970|Vo|
--
--
--
--
--
--
--
--
--
--
--
0.980|Vo|
0.970|Vo|
--
--
--
--
2.25
--
--
Typ
V
OUT
1.24
(V
REF
)
0.05
0.2
40
65
185
250
400
6
10
17
45
4.5
Max
1.020|Vo|
1.020|Vo|
1.030|Vo|
0.5
1.0
100
200
--
--
550
10
20
--
--
--
1.020|Vo|
1.030|Vo|
120
--
--
0.8
--
75
4
Unit
V
V
%
%
ppm/ C
mV
o
Quiescent Current (Note 6)
Current Limited
mA
A
Reference (TS39502)
Reference Voltage
Reference Voltage
Adjust Pin Bias Current
Reference Voltage Temp. Coefficient
Adjust Pin Bias Current Temp. Coefficient
(Note 8)
(Note 7)
1.24
40
20
0.1
--
--
--
--
V
nA
ppm/ C
o
nA/ C
o
Enable Input (TS39501/2/3/4)
Input Logic Voltage
Enable Pin Input Current
Low (OFF)
High (ON)
V
EN
=2.25V
V
EN
=0.8V
V
uA
2/12
Version: A07
TS39500/1/2/3
5A Ultra Low Dropout Positive Voltage Regulator
Electrical Characteristics (Continue)
Flag Output (TS39501)
Output Leakage Current
Output Low Voltage (Note 9)
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
V
OH
=16V
V
IN
=0.9 * V
OUT
, I
OL
=250uA
% of V
OUT
% of V
OUT
--
--
--
93
--
--
--
--
--
1
2
400
99
--
--
uA
mV
%
%
%
Thermal Performance
Condition
Thermal Resistance
Junction to Case
Package type
Typ
Unit
TO-220 / TO-220-5L
80
o
C/W
TO-263 / TO-263-5L
80
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. P
D(max)
= (T
J(max)
- Ta) +
Ө
JA
, where
Ө
JA
depends upon the printed circuit layout. See ”Applications Information”.
o
Note 5. Output voltage temperature coefficient is
ΔV
OUT (worst case)
+(T
J(max)
– T
J(MIN)
) where T
J(max)
is +125 C and T
JMIN)
is
o
-40 C.
Note 6. V
DROP
= V
IN
- V
OUT
when V
OUT
decreases to 99% of its nominal output voltage with V
IN
= V
OUT
+ 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. I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
Note 8. V
EN
<0.8V, V
IN
<8V and V
OUT
=0
Note 9. For 1.8V device, V
IN
= 2.25V (device is in dropout)
Pin Description
Pin Configuration
Enable
Input
Ground
Output
Flag
(fixed voltage)
Feed Back
(adjustable)
Sense
Pin Description
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.
Sense pin is the input to the error amplifier
3/12
Version: A07
TS39500/1/2/3
5A Ultra Low Dropout Positive Voltage Regulator
Functional Diagram
TS39500 Fixed Regulator Block Diagram
TS39501/3/4 Fixed Regulator with Flag and Enable Block Diagram
TS39502 Adjustable Regulator Block Diagram
4/12
Version: A07
TS39500/1/2/3
5A Ultra Low Dropout Positive Voltage Regulator
Application Information
The TS39500/1/2/3 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 TS39500/1/2/3 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 TS39500/1/2/3 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. TS39500/1/2/3
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 TS39500/1/2/3 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 (TS39502) 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.
5/12
Version: A07
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