TS2937
500mA Ultra Low Dropout Voltage Regulator
TO-220 TO-263 TO-252 SOT-223
Pin Definition:
2
(D PAK) (DPAK)
1. Input
2. Ground
3. Output
General Description
TS2937 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 (200uA Typ.) and very low drop output voltage (Typ. 60mV at light load and 600mV at 500mA). This
includes a tight initial tolerance of 2%, extremely good line regulation of 0.05% typ., and very low output
temperature coefficient.
Features Ordering Information
Dropout voltage typically 0.6V @ Io=500mA
Part No. Package Packing
Output voltage trimmed before assembly
TS2937CZxx C0 TO-220 50pcs / Tube
-18V Reverse peak voltage
TS2937CMxx RN TO-263 800pcs / 13 Reel
+30V Input over voltage protection
TS2937CPxx RO TO-252 2.5Kpcs / 13 Reel
+60V Transient peak voltage
TS2937CWxx RP SOT-223 2.5Kpcs / 13 Reel
Internal current limit
Note: Where xx denotes voltage option, available are
Thermal shutdown protection
12= 12V
Block Diagram
50= 5V
33= 3.3V
Contact factory for additional voltage options.
Absolute Maximum Rating
Parameter Symbol Limit Unit
Input Supply Voltage V -18 ~ +60 V
IN
Operation Input Supply Voltage V 26 V
OPR
Power Dissipation P Internally Limited W
D
o
Operating Junction Temperature Range T -40 ~ +125 C
J
o
Storage Temperature Range T -65 ~ +150 C
STG
1/10 Version: D13 TS2937
500mA Ultra Low Dropout Voltage Regulator
o
Electrical Characteristics ( V =V +1V, I =5mA, C =10uF, T =25 C, unless otherwise noted)
IN OUT L O A
Parameter Conditions Min Typ Max Unit
Output Voltage 0.980|Vo| 1.020|Vo| V
12 / 10
5mA I 500mA,
L
5.0 / 3.3
Output Voltage 0.970|Vo| 1.030|Vo| V
Vo+1V V 26V
IN
Input Supply Voltage -- -- 26 V
o
Output Voltage Temperature Coefficient -- 50 150 ppm/ C
Line Regulation Vo+1V V 26V -- 0.05 0.5 %
IN
Load Regulation 5mA I 500mA -- 0.2 1.0 %
L
I =100mA -- 100 300
L
Dropout Voltage (Note 4) I =300mA -- 400 500 mV
L
I =500mA -- 600 700
L
I =100uA -- 200 -- uA
L
Quiescent Current (Note 5) I =300mA -- 12 -- mA
L
I =500mA -- 25 -- mA
L
Short Circuit Current (Note 6) V =0 -- -- 1.3 A
OUT
C =2.2uF -- 500 --
L
Output Noise,
C =3.3uF -- 350 -- uVrms
L
10Hz to 100KHz, I =10mA
L
C =33uF -- 120 --
L
Thermal Performance
Condition Package type Typ Unit
TO-220 60
Thermal Resistance TO-263 80
o
C/W
Junction to Ambient TO-252 150
SOT-223 170
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, 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.
Note 3: 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 4: 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 5: Output current will decrease with increasing temperature, but it will be not dropped below 500mA at the
maximum specified temperature.
2/10 Version: D13