TSC TS39152CM550

TS39151/52
1.5A Ultra Low Dropout Positive Voltage Regulator
Low Dropout Voltage 0.4V (typ.)
Enable Input Control
Adjustable Output
Error Flag Detection
General Description
The TS39151/52 series are 1.5A ultra low dropout linear voltage regulators that provide low voltage, high current output
from an extremely small package. These regulator offers extremely low dropout (typically 400mV at 1.5A) and very low
ground current (typically 12mA at 1.5A).
The TS39151/52 series 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 TS39151/52, the enable pin may be tied to Vin if it is not required for enable control. This series are offered in
5-pin TO-220, TO-263 package.
Features
Ordering Information
Dropout voltage typically 0.4V @Io=1.5A
Part No.
Output current up to 1.5A
Low ground current
Operating Temp.
(Junction)
TS39151CZ5xx
Output voltage trimmed before assembly
TS39151CM5xx
Extremely fast transient response
Reversed leakage protection
Reverse battery protection
Package
TO-220-5L
o
-40 ~ +125 C
TO-263-5L
TS39152CZ5
TO-220-5L
TS39152CM5
TO-263-5L
Note: Where xx denotes voltage option, available are
5.0V, 3.3V, 2.5V and 1.8V.
Error flag signals output out of regulation
Internal current limit
Thermal shutdown protection
Applications
Battery power equipment
High efficiency linear power supplies
LDO linear regulator for PC add-in cards
High efficiency post regulator for switching supply
TM
PowerPC
Low-voltage microcontrollers and digital logic
power supplies
Multimedia and PC processor supplies
SMPS post regulator
Absolute Maximum Rating (Note 1)
Supply Voltage
Vin
-20V ~ +20
Enable Voltage
Ven
+20
Storage Temperature Range
TSTG
Lead Soldering Temperature (260 oC)
5
ESD
TS39151/52
-65 ~ +150
(Note 3)
1-1
2004/09 rev. A
V
V
o
C
S
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
o
C
Electrical Characteristics
Vin = Vout + 1V, Venable= 2.4V, Tj = 25 oC, unless otherwise specified.
Parameter
Conditions
Min
Typ
Max
Output Voltage
IL=10mA
0.990|Vo|
5.0/3.3
1.010|Vo|
Output Voltage
10mA ≤ IL ≤ 1.5A,
0.980|Vo|
2.5/1.8
1.020|Vo|
Unit
V
Vo+1V ≤ Vin ≤ 8V
Line Regulation
IL=10mA, Vo+1V ≤Vin≤ 16V
--
0.05
0.5
%
Load Regulation
Vin=Vout+1V,
--
0.2
1.0
%
--
40
100
ppm/ oC
IL=100mA
--
100
200
IL=750mA
--
275
--
IL=1.5A
--
400
600
IL=750mA
--
7
20
IL=1.5A
--
17
--
mA
--
2.0
2.5
A
--
7
10
mA
0.980|Vo|
1.24
1.020|Vo|
10mA≤IL≤1.5A
Output Voltage Temp. Coefficient
Dropout Voltage (Note 5)
Quiescent Current (Note 6)
Current Limited
∆Vout= -1%
Vin=Vout+1V
Vout=0, Vin=Vout+1V
Minimum Load Current
mV
Reference (TS39152)
Reference Voltage
Reference Voltage
(Note 7)
0.970|Vo|
Adjust Pin Bias Current
Reference Voltage Temp. Coefficient
(Note 8)
Adjust Pin Bias Current Temp.
1.030|Vo|
V
--
40
120
nA
--
20
--
ppm/ oC
--
0.1
--
nA/ oC
Coefficient
Flag Output (TS39151)
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
--
--
%
--
1
--
%
Low (OFF)
--
--
0.8
V
High (ON)
2.25
--
--
Ven=2.25V
--
--
75
Ven=0.8V
--
--
4
Hysteresis
Enable Input (TS39151 / 2)
Input Logic Voltage
Enable Pin Input Current
TS39151/52
2-2
2004/09 rev. A
uA
Thermal Performance
Condition
Package type
Typ
Thermal Resistance
TO-220, TO-220-5L
2.0
Junction to Case
TO-263, TO-263-5L
2.0
Unit
o
C/W
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, θja, 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 θja can be reduced by using a heatsink, Pd(max) = (Tj(max) – Ta) / Θja.
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, Iin = Ignd + Iout.
Note 7: Vref ≤ Vout ≤ (Vin – 1V), 2.25V ≤ Vin ≤ 16V, 10mA ≤ IL ≤ 1.5A.
o
Note 8: Output voltage temperature coefficient is ∆Vout (worse cast) / (Tj(max) - Tj(min)) where is Tj(max) +125 C and
Tj(min) is 0 oC.
Note 9: For adjustable device and fiexed device with Vout > 2.25V.
Block Diagram
* Flag network is fixed output versions only (TS39151)
** Adjustable output version only (TS39152)
TS39151/52
3-3
2004/09 rev. A
Pin Assignment
Pin No.
Pin
Pin
TS39151
TS39152
Configuration
Description
1
1
Enable
Enable (input): TTL/COMS compatible input. Logic high is
enable; logic low or open is shutdown
2
2
Input
Unregulated input: +16V maximum supply
3
3
Ground
Ground: Ground pin and TAB/heatsink are internally
connected.
4
4
5
Output
Regulator output
Flag
Error Flag (output): Open-collector output. Active low
indicates an output fault condition.
5
Adjust
Adjustment input: Feedback input. Connect to resistive
voltage-divider network.
Typical Application Circuit
TS39151
TS39152
TS39151/52
4-4
2004/09 rev. A
Application Information
Application Information
Thermal Characteristics
The TS39151/52 series are high performance with low
TS39151/52 series linear regulators are simple to use,
dropout voltage regulator suitable for moderate to high
the most complicated design parameters to consider
current
are thermal characteristics, thermal design requires the
and
voltage
regulator
application.
Its
400mV(typ) dropout voltage at full load and over
following application specification parameters:
temperature makes it especially valuable in battery
Maximum ambient temperature, Ta
power systems and as high efficiency noise filters in
Output current, Iout
post
Output voltage, Vout
regulator
applications.
Unlike
normal
NPN
transistor design, where the base to emitter voltage
Input voltage, Vin
drop and collector to emitter saturation voltage limit the
We calculate the power dissipation of the regulator
minimum dropout voltage, dropout performance of the
from these numbers and the device parameters from
PNP output of these devices is limited only by low Vce
this data sheet. A heatsink may be required depending
saturation voltage.
on the maximum power dissipation and maximum
The TS39151/52 series is fully protected from damage
ambient temperature of the application. Under all
due to fault conditions. Linear current limiting is
possible operating conditions, the junction temperature
provided. Output current during overload conditions is
must be within the range specified under absolute
constant. Thermal shutdown the device when the die
maximum ratings. To determine if the heatsink is
temperature exceeds the maximum safe operating
required, the power dissipated by the regulator, PD
temperature. Transient protection allows device survival
must be calculated.
even when the input voltage spikes above and below
The below formula shows the voltages and currents for
nominal. The output structure of these regulators allows
calculating the PD in the regulator:
voltages in excess of the desired output voltage to be
Iin = IL / IG
applied without reverse current flow.
PD = (Vin-Vout) * IL + (Vin) * IG
Capacitor Requirement
Ex. PD = (3.3V-2.5V) * 0.5A + 3.3V * 11mA
The TS39151/52 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. TS39151/52 series regulators are stable
with the 10uF minimum capacitor value at full load.
Where the regulator is powered from a source with high
AC impedance, a 0.1uF capacitor connected between
input and ground is recommended. The capacitor
should have good characteristics to above 250KHz. The
capacitance values will be help to improved transient
response, ripple rejection and output noise.
= 436mW
Remark: IL is output load current,
IG is ground current.
Vin is input voltage
Vout is output voltage
The next parameter which must be calculated is the
maximum allowable temperature rise, TR(max). this is
calculated by the using to formula:
TR(max) = TJ(max) – TA(max)
Where: TJ(max) is the maximum allowable junction
temperature, which is 125 oC for commercial
grade parts.
Minimum Load Current
TA(max)
The TS39151/52 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 swamps any expected leakage
current across the operating temperature range.
TS39151/52
= 400mW + 36mW
5-5
temperature
which
is
the
will
be
maximum
encountered
ambient
in
the
application. Using the calculated values for TR(max)
and PD, the maximum allowable value for the junction
to ambient thermal resistance, θja, can now be found:
θja = TR(max) / PD
2004/09 rev. A
Application Information (continues)
Adjustable Regulator Design
The adjustable regulator versions (TS39152) 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:
R1 = R2 * [(Vout / 1.24) – 1]
Where is Vout 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.
Error Flag
TS39151 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) and low input voltage. The flag output is
inoperative
during
over
temperature
shutdown
conditions.
Enable Input
TS39151 and TS39152 versions feature an enable
(EN) input that allows ON/OFF control of the device.
Special design allows “zero” current drain when the
device is disabled–only microamperes of leakage
current flow. The EN input has TTL/CMOS compatible
thresholds for simple interfacing with logic, or may be
directly tied to ≤20V. Enabling the regulator requires
approximately 30uA of current.
TS39151/52
6-6
2004/09 rev. A
TO-220-5L Mechanical Drawing
G
B
A
H
C
DIM
M
N
L
I
F
K
E
TO-220 DIMENSION
MILLIMETERS
INCHES
A
B
C
D
E
F
G
H
I
MIN
10.00
3.240
2.440
0.260
1.570
13.31
4.475
1.170
27.60
MAX
10.50
4.440
2.940
1.020
1.830
14.13
5.225
1.370
29.44
MIN
0.394
0.128
0.096
0.010
0.062
0.524
0.176
0.046
1.087
MAX
0.413
0.175
0.116
0.040
0.072
0.556
0.206
0.054
1.159
J
K
L
M
N
2.175
0.297
8.280
6.010
14.29
2.925
0.477
8.800
6.510
15.31
0.086
0.012
0.326
0.237
0.563
0.115
0.019
0.346
0.256
0.603
J
D
TO-263-5L Mechanical Drawing
A
E
F
J
B
I
C
G
D
TS39151/52
H
7-7
DIM
A
B
C
D
E
F
G
H
I
J
TO-263 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
10.220
10.260
0.402
0.404
14.600
15.870
0.575
0.625
0.750
0.770
0.030
0.030
1.573
1.827
0.062
0.072
4.560
4.570
0.179
0.180
1.240
1.270
0.049
0.050
2.280
2.790
0.090
0.110
0.280
0.320
0.011
0.013
8.240
8.280
0.324
0.326
1.540
1.800
0.060
0.071
2004/09 rev. A