TS29151/52/53
1.5A Ultra Low Dropout Positive Voltage Regulator
Low Dropout Voltage 0.6V max.
Enable Input Control
Adjustable Output
Error Flag Detection
General Description
The TS29151/52/53 series are using process with a PNP pass element for high current, high accuracy and low dropout
voltage regulators. These regulator s feature 350mV(typ) dropout voltages and very low ground current, these devices
also find applications in lower current and low dropout critical systems, where their tiny dropout voltage and ground
current values are important attributes.
The TS29151/52/53 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 TS29151 and TS29152, the enable pin may be tied to Vin if it is not required for enable control. This series are
offered in 5-pin TO-263, TO-220 package.
Features
Dropout voltage typically 0.6V @Io=1.5A
Output current up to 1.5A
Low ground current
Output voltage trimmed before assembly
Extremely fast transient response
+60V Transient peak voltage
-20V Reverse peak voltage
Zero current shutdown mode
Error flag signals output out of regulation
Internal current limit
Thermal shutdown protection
Ordering Information
Part No.
TS29151CZ5-xx
TS29152CZ5
TS29153CZ5
TS29151CM5-xx
TS29152CM5
TS29153CM5
Note: Where xx denotes voltage option, available are
12V, 5.0V, 3.3V and 2.5V. Leave blank for adjustable
version. Contact factory for additional voltage options.
TO-263-5L
-40 ~ +125
o
C
TO-220-5L
Operating Temp.
(Junction)
Package
Applications
Battery power equipment
Automotive electronics
High efficiency “Green” computer system
High efficiency linear power supplies
High efficiency post regulator for switching supply
Absolute Maximum Rating
(Note 1)
Input Supply Voltage (Note 2)
Operation Input Voltage
Power Dissipation (Note 3)
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260
o
C)
Vin
Vin (operate)
P
D
T
J
T
STG
-20V ~ +60
26
Internally Limited
-25 ~ +125
-65 ~ +150
5
V
V
W
o
o
C
C
S
TS29151/52/53
1-1
2003/12 rev. D
Electrical Characteristics
Vin = Vout + 1V, Venable= 2.4V, I
L
= 10mA, C
o
= 10uF, Adjustable versions are programmed to 5V output, Tj = 25
o
C
unless otherwise specified.
Parameter
Output Voltage
Output Voltage
Input Supply Voltage
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
Dropout Voltage (Note 4)
Conditions
10mA
≤
I
L
≤
1.5A,
Vo+1V
≤
Vin
≤
26V
Min
0.990|Vo|
0.980|Vo|
--
--
Typ
12 / 5.0
3.3/ 2.5
--
20
0.05
0.2
80
200
350
8
22
2.1
600
400
260
Max
1.010|Vo|
1.020|Vo|
26
100
0.5
1.0
200
Unit
V
V
ppm/
o
C
%
%
mV
Vo+1V
≤
Vin
≤
26V
10mA
≤
I
L
≤
1.5A
I
L
=100mA
I
L
=750mA
I
L
=1.5A
--
--
--
--
--
--
--
--
--
--
--
600
--
--
3.5
--
--
--
uVrms
A
mA
Quiescent Current (Note 5)
Short Circuit Current (Note 6)
Output Noise,
10Hz to 100KHz, I
L
=100mA
I
L
=750mA
I
L
=1.5A
Vout=0
C
L
=2.2uF
C
L
=10uF
C
L
=33uF
Reference (TS29152 / TS29153)
Reference Voltage
Reference Voltage
Adjust Pin Bias Current
Reference Voltage Temperature
Coefficient
Adjust Pin Bias Current
Temperature Coefficient
(Note 7)
10mA
≤
I
L
≤
1.5A,
2.3V
≤
Vin
≤
26V
--
--
--
40
20
0.1
80
--
--
nA
ppm/
o
C
nA/
o
C
0.980|Vo|
0.970|Vo|
1.24
1.020|Vo|
1.030|Vo|
V
Flag Output (TS29151 / TS29153)
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Input Logic Voltage
Enable Pin Input Current
Regulator Output Current
Shutdown
V
OH
=26V
Vin=4.5V, I
OL
=250uA
(Note 8)
(Note 8)
(Note 8)
Low (OFF)
High (ON)
Ven=26V
Ven=0.8V
Ven
≤
0.8V, Vin
≤
26V,
Vout=0
--
--
40
--
--
--
2.4
--
--
--
--
--
60
75
15
--
--
--
--
10
2
300
--
95
--
0.8
--
750
5
500
uA
uA
uA
mV
mV
mV
mV
V
Enable Input (TS29151 / TS29152)
TS29151/52/53
2-2
2003/12 rev. D
Thermal Performance
Condition
Thermal Resistance
Junction to Ambient
Package type
TO-220-5L
TO-263-5L
Typ
60
80
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: Maximum positive supply voltage of 60V must be limited duration (<100mS) and duty cycle (<1%).
Note 3: 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.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value measured at 1V differential.
Note 5: 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.
Note 6: Output current will decrease with increasing temperature, but it will be not dropped below 1.5A at the maximum
specified temperature.
Note 7: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is
applied, excluding load or line regulation effects. Specification are for a 200mA load pulse at Vin=20V(a 4W
pulse) for T=10mS
Note 8: Comparator thresholds are expressed in terms of a voltage differential at the adjust terminal below the nominal
reference voltage measured at 6V input. To express these thresholds in terms of output voltage change,
multiply by the error amplifier gain = Vout / Vref = (R1+R2) / R2. For example, at a programmed output voltage
of 5V, the error output is guaranteed to go low when the output drops by 95mV x 5V / 1.24V = 384mV.
Thresholds remain constant as a percent of Vout as Vout is varied, with the dropout warning occurring at
typically 5% below nominal, 7.7% guaranteed.
Block Diagram
* Feedback network is fixed output versions only (TS29151)
** Adjustable output version only (TS29152 / TS29153)
TS29151/52/53
3-3
2003/12 rev. D
Pin Assignment
Pin No.
TS29151
1
2
3
4
5
5
TS29152
1
2
3
4
2
3
4
1
5
TS29153
Pin
Configuration
Enable
Input
Ground
Output
Flag
Adjust
Pin
Description
Enable (input): TTL/COMS compatible input. Logic high is
enable; logic low or open is shutdown
Unregulated input: +26V maximum supply
Ground: Ground pin and TAB/heatsink are internally
connected.
Regulator output
Error Flag (output): Open-collector output. Active low
indicates an output fault condition.
Adjustment input: Feedback input. Connect to resistive
voltage-divider network.
Typical Application Circuit
TS29151
TS29152
TS29153
TS29151/52/53
4-4
2003/12 rev. D
Application Information
Application Information
The TS29151/52/53 series are high performance with
low dropout voltage regulator suitable for moderate to
high current and voltage regulator application. Its
350mA(typ) 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 TS29151/52/53 series 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.
Thermal Characteristics
TS29151/52/53 series linear regulators are simple to
use, the most complicated design parameters to
consider are thermal characteristics, thermal design
requires
the
following
application
specification
parameters:
Maximum ambient temperature, Ta
Output current, Iout
Output voltage, Vout
Input voltage, Vin
We calculate the power dissipation of the regulator
from these numbers and the device parameters from
this data sheet. A heatsink may be required depending
on the maximum power dissipation and maximum
ambient temperature of the application. Under all
possible operating conditions, the junction temperature
must be within the range specified under absolute
maximum ratings. To determine if the heatsink is
required, the power dissipated by the regulator, P
D
must be calculated.
The below formula shows the voltages and currents for
calculating the P
D
in the regulator:
Iin = I
L
/ I
G
P
D
= (Vin-Vout) * I
L
+ (Vin) * I
G
Ex. P
D
= (3.3V-2.5V) * 0.5A + 3.3V * 11mA
= 400mW + 36mW
= 436mW
Remark: I
L
is output load current,
I
G
is ground current.
Vin is input voltage
Vout is output voltage
The next parameter which must be calculated is the
maximum allowable temperature rise, T
R
(max). this is
calculated by the using to formula:
T
R
(max) = T
J
(max) – T
A
(max)
Where: T
J
(max) is the maximum allowable junction
temperature, which is 125
o
C for commercial
grade parts.
T
A
(max)
temperature
which
is
will
the
be
maximum
encountered
ambient
in
the
Capacitor Requirement
The TS29151/52/53 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. TS29151/52/53 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.
Minimum Load Current
The TS29151/52/53 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.
application. Using the calculated values for T
R
(max)
and P
D
, the maximum allowable value for the junction
to ambient thermal resistance,
θja,
can now be found:
θja
= T
R
(max) / P
D
TS29151/52/53
5-5
2003/12 rev. D
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