TSC TS2937 Technical data
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TS2937
500mA Ultra Low Dropout Fixed Positive Voltage Regulator
TO-263
Pin assignment:
1. Input
2. Ground
3. Output
Low Dropout Voltage 0.6V max.
General Description
The TS2937 series of fixed-voltage monolithic micro-power voltage regulators is designed for a wide range of
applications. This device excellent choice of use in battery-power application. Furthermore, the quiescent current
increases on slightly at dropout, which prolongs battery life.
This series of fixed-voltage regulators features very low ground current (100uA Typ.) and very low drop output voltage
(Typ. 60mV at light load and 600mV at 500mA). This includes a tight initial tolerance of 1% typ., extremely good line
regulation of 0.05% typ., and very low output temperature coefficient.
This series is offered in 3-pin TO-263, TO-220, TO-252 & SOT-223 package.
Features
Dropout voltage typically 0.6V @Io=500mA
Output current up to 500mA
Output voltage trimmed before assembly
-18V Reverse peak voltage
+30V Input over voltage protection
+60V Transient peak voltage
Internal current limit
Thermal shutdown protection
Block Diagram Ordering Information
Part No. Operation Temp.
(Ambient)
TS2937CZxx TO-220
TS2937CMxx TO-263
TS2937CPxx TO-252
TS2937CWxx
Note: Where xx denotes voltage option, available are
12V, 10V, 8V, 5V, 3.3V and 2.5V. Contact factory
for additional voltage options.
-20 ~ +85
o
C
Package
SOT-223
Absolute Maximum Rating (Note 1)
Input Supply Voltage (Note 2) Vin -18 ~ +60 V
Operation Input Supply Voltage Vin (operate) 26 V
Power Dissipation (Note 3) PD Internally Limited W
Operating Junction Temperature Range TJ -25 ~ +125
Storage Temperature Range T
Lead Soldering Temperature (260 oC)
TO-220 / TO-263 Package
TO-252 / SOT-223 Package
-65 ~ +150
STG
5
4
o
C
o
C
S
TS2937 1-1 2003/12 rev. B
Electrical Characteristics
Vin = Vout + 1V, IL = 5mA, Co = 10uF, Ta = 25
o
C, unless otherwise specified.
Parameter Conditions Min Typ Max Unit
Output Voltage 0.980|Vo| 1.020|Vo| V
Output Voltage 5mA ≤ IL ≤ 500mA,
Vo+1V ≤ Vin ≤ 26V
Input Supply Voltage -- -- 26 V
Output Voltage Temperature
Coefficient
Line Regulation Vo+1V ≤ Vin ≤ 26V -- 0.05 0.5 %
Load Regulation 5mA ≤ IL ≤ 500mA -- 0.2 1.0 %
Dropout Voltage (Note 4) IL=100mA
Quiescent Current (Note 5) IL=100uA
Short Circuit Current (Note 6) Vout=0 -- -- 1.3 A
Output Noise,
10Hz to 100KHz, IL=10mA
-- 50 150 ppm/ oC
IL=300mA
IL=500mA
IL=300mA
IL=500mA
CL=2.2uF
CL=3.3uF
CL=33uF
0.970|Vo|
--
--
--
--
--
--
--
--
--
Vout
100
300
500
100
12
25
500
350
120
1.030|Vo| V
200
400
600
--
--
--
--
--
--
mV
uA
mA
uVrms
Thermal Performance
Condition Package type Typ Unit
Thermal Resistance
Junction to Ambient
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 500mA at the maximum
specified temperature.
TO-220 60
TO-263 80
TO-252 150
SOT-223 170
o
C/W
TS2937 2-2 2003/12 rev. B
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