TS5204
150mA Low Noise LDO Voltage Regulator
Pin assignment
SOT-89
1. Output
2. Ground
3. Input
SOT-23
1. Output
2. Input
3. Ground
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
Part No.
TS5204CXxx
Operating Temp.
o
-40 ~ +125 C
Package
SOT-23
SOT-89
TS5204CYxx
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.
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
Power Dissipation (Note 2)
Thermal Resistance
SOT-23
SOT-89
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260
o
C)
Tj
T
STG
Vin
P
D
Өja
-20~ +20
Internal limited
220
180
-40 ~ +125
-65 ~ +150
5
o
o
o
V
C/W
C
C
S
TS5204 series
1-4
2004/09 rev. A
Recommend Operating Rating
(Note 3)
Input Supply Voltage
Vin
+2.5 ~ +16
V
Electrical Characteristics
Vin=Vo+1V, Io=100uA, Cout=1uF, Vce
≥
2V, Tj = 25
o
C, unless otherwise specified.
Parameter
Output Voltage
Conditions
Vin=Vo + 1V
Vin=Vo + 1V, Io= 50mA
Min
0.99|Vo|
0.98|Vo|
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Typ
Vout
Max
1.01|Vo|
1.02|Vo|
Unit
V
ppm/
o
C
%/V
%/V
Output Voltage Temp. Coefficient
Line Regulation
Load Regulation (Note 5)
Dropout Voltage (Note 6)
(Note 4)
Vo+1V
≤
Vin
≤
16V
0.1mA
≤
Io
≤
150mA
Io=100uA
Io=50mA
Io=100mA
Io=150mA
40
0.005
0.02
17
110
140
165
80
350
600
1300
300
75
0.05
260
--
0.05
0.2
50
150
250
275
125
600
1000
1900
500
--
--
--
mV
Ground Pin Current (Note 7)
Io=100uA
Io=50mA
Io=100mA
Io=150mA
uA
Output Current Limit
Power Supply Rejection Ratio
Thermal Regulation (Note 8)
Output Noise
Vout=0V
At f=100Hz, Io=100uA,
mA
dB
%/W
nV√Hz
Io=50mA, Cout=2.2uF,
470pF from bypass to Ground
--
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] +
Өja.
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
2-4
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 ] /Θja
Tj(max) is the maximum junction temperature of the
die(125
o
C),
and
Ta
is
the
ambient
operating
temperature.
Θja
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
o
C – 25
o
C) / 220
o
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.
o
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 5Ω 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
o
C, solid tantalums
are recommended for operation below –25
o
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.
TS5204 series
3-4
2004/09 rev. A
嵌入式系统
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