TS39151/52

1-1

2004/09 rev. A

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

Dropout voltage typically 0.4V @Io=1.5A

Output current up to 1.5A

Low ground current

Output voltage trimmed before assembly

Extremely fast transient response

Reversed leakage protection

Reverse battery protection

Error flag signals output out of regulation

Internal current limit

Thermal shutdown protection

Ordering Information

Note: Where

denotes voltage option, available are

5.0V, 3.3V, 2.5V and 1.8V.

Part No.

Operating Temp.

(Junction)

Package

TS39151CZ5

TO-220-5L

TS39151CM5

TO-263-5L

TS39152CZ5 TO-220-5L

TS39152CM5

-40 ~ +125

TO-263-5L

Applications

Battery power equipment

LDO linear regulator for PC add-in cards

PowerPC

power supplies

Multimedia and PC processor supplies

High efficiency linear power supplies

High efficiency post regulator for switching supply

Low-voltage microcontrollers and digital logic

SMPS post regulator

Absolute Maximum Rating

(Note 1)

Supply Voltage

Vin

-20V ~ +20

Enable Voltage

Ven

+20

Storage Temperature Range

STG

-65 ~ +150

Lead Soldering Temperature (260

ESD

(Note 3)

TS39151/52

2-2

2004/09 rev. A

Operating Rating

(Note 2)

Operation Input Voltage

Vin (operate)

+2.25 ~ +16

Operation Enable Voltage

Ven (operate)

+2.25 ~ +16

Power Dissipation (Note 4)

Internally Limited

Operating Junction Temperature Range

-40 ~ +125

Electrical Characteristics

Vin = Vout + 1V, Venable= 2.4V, Tj = 25

C, unless otherwise specified.

Parameter Conditions

Min

Typ

Max

Unit

Output Voltage

=10mA 0.990|Vo|

1.010|Vo|

Output Voltage

10mA

1.5A,

Vo+1V

Vin 8V

0.980|Vo|

5.0/3.3
2.5/1.8

1.020|Vo|

Line Regulation

=10mA, Vo+1V

Vin 16V

0.05

0.5

Load Regulation

Vin=Vout+1V,
10mA

1.5A

-- 0.2 1.0 %

Output Voltage Temp. Coefficient

100

ppm/

Dropout Voltage (Note 5)

Vout= -1%

=100mA

=750mA

=1.5A

--
--
--

100
275
400

200

600

Quiescent Current (Note 6)

Vin=V

out

+1V

=750mA

=1.5A

--
--

Current Limited

Vout=0, Vin=Vout+1V

-- 2.0 2.5 A

Minimum Load Current

Reference (TS39152)

Reference Voltage

0.980|Vo|

1.020|Vo|

Reference Voltage

(Note 7)

0.970|Vo|

1.24

1.030|Vo| V

Adjust Pin Bias Current

120

Reference Voltage Temp. Coefficient

(Note 8)

ppm/

Adjust Pin Bias Current Temp.
Coefficient

-- 0.1 --

nA/

Flag Output (TS39151)

Output Leakage Current

=16V --

Output Low Voltage (Note 9)

Vin=0.9 * Vout, I

=250uA -- -- 400 mV

Upper Threshold Voltage

% of Vout

Lower Threshold Voltage

% of Vout

Hysteresis

Enable Input (TS39151 / 2)

Low (OFF)

0.8

Input Logic Voltage

High (ON)

2.25

Ven=2.25V --

Enable Pin Input Current

Ven=0.8V --

TS39151/52

3-3

2004/09 rev. A

Thermal Performance

Condition Package

type

Typ Unit

TO-220, TO-220-5L

2.0

Thermal Resistance

Junction to Case

TO-263, TO-263-5L

2.0

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, 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 ja can be reduced by using a heatsink, Pd

(max)

= (Tj

(max)

� Ta) / 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, Iin = Ignd + Iout.

Note 7: Vref

Vout (Vin � 1V), 2.25V Vin 16V, 10mA I

1.5A.

Note 8: Output voltage temperature coefficient is Vout (worse cast) / (Tj

(max)

- Tj

(min)

) where is Tj

(max)

+125

C and

(min)

is 0

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

5-5

2004/09 rev. A

Application Information

The TS39151/52 series are high performance with low
dropout voltage regulator suitable for moderate to high
current and voltage regulator application. Its
400mV(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 TS39151/52 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.

Capacitor Requirement

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.

Minimum Load Current

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.

Thermal Characteristics

TS39151/52 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

must be calculated.
The below formula shows the voltages and currents for
calculating the P

in the regulator:

Iin = I

/ I

= (Vin-Vout) * I

+ (Vin) * I

Ex. P

= (3.3V-2.5V) * 0.5A + 3.3V * 11mA

= 400mW + 36mW
= 436mW

Remark: I

is output load current,

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

(max). this is

calculated by the using to formula:
T

(max) = T

(max) � T

(max)

Where: T

(max) is the maximum allowable junction

temperature, which is 125

C for commercial

grade parts.

(max) is the maximum ambient

temperature which will be encountered in the
application. Using the calculated values for T

(max)

and P

, the maximum allowable value for the junction

to ambient thermal resistance, ja, can now be found:
ja = T

(max) / P

TS39151/52

6-6

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 1M, 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

7-7

2004/09 rev. A

TO-220-5L Mechanical Drawing

TO-220 DIMENSION

MILLIMETERS INCHES

DIM

MIN MAX MIN MAX

A 10.00 10.50 0.394 0.413
B 3.240 4.440 0.128 0.175
C 2.440 2.940 0.096 0.116
D 0.260 1.020 0.010 0.040
E 1.570 1.830 0.062 0.072
F 13.31 14.13 0.524 0.556

G 4.475 5.225 0.176 0.206

H 1.170 1.370 0.046 0.054

I 27.60 29.44 1.087 1.159

J 2.175 2.925 0.086 0.115

K 0.297 0.477 0.012 0.019

L 8.280 8.800 0.326 0.346

M 6.010 6.510 0.237 0.256

N 14.29 15.31 0.563 0.603

TO-263-5L Mechanical Drawing

TO-263 DIMENSION

MILLIMETERS INCHES

DIM

MIN MAX MIN MAX

A 10.220 10.260 0.402 0.404
B 14.600 15.870 0.575 0.625
C 0.750 0.770 0.030 0.030
D 1.573 1.827 0.062 0.072
E 4.560 4.570 0.179 0.180
F 1.240 1.270 0.049 0.050

G 2.280 2.790 0.090 0.110

H 0.280 0.320 0.011 0.013

I 8.240 8.280 0.324 0.326

J 1.540 1.800 0.060 0.071

Электронный компонент: TS39151CZ51.8