TS5204 series

1-4

2004/09 rev. A

TS5204

150mA Low Noise LDO Voltage Regulator

Low Power Consumption

Low Dropout Voltage 0.275V

General Description

The TS5204 series is an efficient linear voltage regulator with ultra low noise output, very low dropout voltage (typically
17mV at light loads and 165mV at 150mA), and very low power consumption (600uA at 100mA), providing high output
current even when the application requires very low dropout voltage. The TS5204 series is included a precision voltage
reference, error correction circuit, a current limited output driver, over temperature shutdown and revered battery
protection.
The TS5204 series is available in 3-pin SOT-23 and SOT-89 package.

Features

Ultra low noise output.

Output current up to 150mA

Low dropout voltage

Low power consumption

Internal current limit

Thermal shutdown protection

Ordering Information

Note: Where xx denotes voltage option, available are

5.0V, 3.3V, 3.0V, 2.9V, 2.8V, 2.5V and 1.8V. Leave
blank for adjustable version. Contact factory for
additional voltage options.

Part No.

Operating Temp. Package

TS5204CXxx

SOT-23

TS5204CYxx

-40 ~ +125

SOT-89

Applications

Cellular telephones

Palmtops, notebook computers

Battery powered equipment

Consumer and personal electronics

SMPS post regulator and DC to DC modules

High-efficiency linear power supplies

Typical Application Circuit

Absolute Maximum Rating

(Note 1)

Input Supply Voltage

Vin

-20~ +20

Power Dissipation (Note 2)

Internal limited

SOT-23 220

Thermal Resistance

SOT-89

180

C/W

Operating Junction Temperature Range

-40 ~ +125

Storage Temperature Range

STG

-65 ~ +150

Lead Soldering Temperature (260

Pin assignment

SOT-89

1. Output

2. Ground

3. Input

SOT-23

1. Output

2. Input

3. Ground

TS5204 series

2-4

2004/09 rev. A

Recommend Operating Rating

(Note 3)

Input Supply Voltage

Vin

+2.5 ~ +16

Electrical Characteristics

Vin=Vo+1V, Io=100uA, Cout=1uF, Vce

2V, Tj = 25

C, unless otherwise specified.

Parameter Conditions

Min

Typ

Max

Unit

Vin=Vo + 1V

0.99|Vo|

1.01|Vo|

Output Voltage

Vin=Vo + 1V, Io= 50mA

0.98|Vo|

Vout

1.02|Vo|

Output Voltage Temp. Coefficient (Note 4)

ppm/

Line Regulation

Vo+1V

Vin 16V

0.005

0.05

%/V

Load Regulation (Note 5)

0.1mA

Io 150mA

0.02

0.2

%/V

Io=100uA --

Io=50mA --

110

150

Io=100mA --

140

250

Dropout Voltage (Note 6)

Io=150mA --

165

275

Io=100uA --

125

Io=50mA --

350

600

Io=100mA --

600

1000

Ground Pin Current (Note 7)

Io=150mA --

1300

1900

Output Current Limit

Vout=0V

300

500

Power Supply Rejection Ratio

At f=100Hz, Io=100uA,

Thermal Regulation (Note 8)

0.05

%/W

Output Noise

Io=50mA, Cout=2.2uF,

470pF from bypass to Ground

-- 260 --

nVHz

Note 1: Exceeding the absolute maximum rating may damage the device.

Note 2: The maximum allowable power dissipation at any Ta is Pd(max) = [ Tj(max) - Ta] + ja. Exceeding the

maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into
thermal shutdown.

Note 3: The device is not guaranteed to function outside its operating rating.

Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total

temperature range.

Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested

for load regulation in the load range from 1mA to 150mA. Changes in output voltage due to heating effects
are covered by the thermal regulation specification.

Note 6: 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 7: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current

drawn from the supply is the sum of the load current plus the ground pin current.

Note 8: 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. Specifications are for a 150mA load pulse at Vin=16V for
t=10mS.

TS5204 series

3-4

2004/09 rev. A

Application Information

Thermal Characteristics

TS5204 series is designed to provide 150mA of
continuous current in a very small package. Maximum
power dissipation can be calculated based on the
output current and the voltage drop across the part. To
determine the maximum power dissipation of the
package, use the junction-ambient thermal resistance of
the device and the following basic equation:

Pd(max) = [ Tj(max) � Ta ] /ja

Tj(max) is the maximum junction temperature of the
die(125

C), and Ta is the ambient operating

temperature. ja is layout dependent, the actual power
dissipation of the regulator circuit can be determined
using the equation:

Pd = ( Vin � Vout ) * Iout + Vin * Ignd

Substituting Pd(max) for Pd and solving for the
operating conditions that are critical to the application
will give the maximum operating conditions for the
regulator circuit. For example, when operating the
TS5204CX33 at room temperature with a minimum
footprint layout, the maximum input voltage for a set
output current can be determined as follows:
Pd(max) = (125

C � 25

C) / 220

C/W

Pd(max) = 455mW

The junction to ambient thermal resistance for the
minimum footprint is 220

C/W, the maximum power

dissipation must not be exceeded for proper operation.
Using the output voltage of 3.3V and an output current
of 150mA, the maximum input voltage can be
determined. Formt eh electrical characteristics table, the
maximum ground current for 150mA output current is
2.5mA.
445mW = ( Vin � 3.3V ) * 150mA + Vin * 2.5mA
445mW = Vin * 150mA � 3.3 * 150mA + Vin * 2.5mA
445mW = Vin * 150mA � 495mW + Vin * 2.5mA
950mW = Vin * 152.5mA
Vin(max) = 6.23v

Therefore, a 3.3V application at 150mA of output
current can accept a maximum input voltage of 6.23V in
a SOT-23 package.

Input Capacitor Requirement

An input capacitor of 1uF or greater is recommended
when the device is more than 10" away from the bulk
AC supply capacitance or when the supply is a battery.

Output Capacitor Requirement

The TS5204 series requires an output capacitor to
maintain stability and improve transient response is
necessary. 2.2uF minimum is recommended. Larger
values improve the regulator's transient response. The
output capacitor value may be increased without limit.
The output capacitor should have an ESR (effective
series resistance) less than 5 and a resonant
frequency above 1MHz. Ultra low ESR capacitors can
cause a low amplitude oscillation on the output and/or
under damped transient response. Most of tantalum or
aluminum electrolytic capacitors are adequate; film
types will work. Since many aluminum electrolytic have
electrolytes that freeze at about �30

C, solid tantalums

are recommended for operation below �25

C. At lower

values of output current, less output capacitance is
required for output stability. The capacitor can be
reduced to 0.47uF for current below 10mA or 0.33uF
for currents below 1mA.

No Load Stability

The TS5204 series iwill remain stable and in regulation
with no load, unlike many other voltage regulators.
This is especially important in CMOS RAM keep alive
applications.

Dual Supply Operation

When used in dual supply systems where the regulator
load is returned to a negative supply, the output
voltage must be diode clamped to ground.

Электронный компонент: TS5204CX2.9