データシート TS2937 PDF ( 特性, スペック, ピン接続図 )

部品番号 TS2937
部品説明 500mA Ultra Low Dropout Fixed Positive Voltage Regulator
メーカ Taiwan Semiconductor Company
ロゴ Taiwan Semiconductor Company ロゴ 
Total 10 pages

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TS2937 Datasheet, TS2937 PDF,ピン配置, 機能
500mA Ultra Low Dropout Voltage Regulator
Pin Definition:
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.
Dropout voltage typically 0.6V @ Io=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.
TS2937CZxx C0 TO-220
50pcs / Tube
TS2937CMxx RN TO-263 800pcs / 13” Reel
TS2937CPxx RO TO-252 2.5Kpcs / 13” Reel
TS2937CWxx RP SOT-223 2.5Kpcs / 13” Reel
Note: Where xx denotes voltage option, available are
12= 12V
50= 5V
33= 3.3V
Contact factory for additional voltage options.
Absolute Maximum Rating
Input Supply Voltage
Operation Input Supply Voltage
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
-18 ~ +60
Internally Limited
-40 ~ +125
-65 ~ +150
1/10 Version: D13

1 Page

TS2937 pdf, ピン配列
500mA Ultra Low Dropout Voltage Regulator
Application Information
The TS2937 series is a high performance with low dropout voltage regulator suitable for moderate to high current
and voltage regulator application. Its 600mV(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 TS2937 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.
Typical Application Circuit
Output Capacitor
The TS2937 series requires an output capacitor to maintain stability and improve transient response. Proper
capacitor selection is important to ensure proper operation. The output capacitor selection is dependent upon the
ESR of the output capacitor the maintain stability. When the output capacitor is 10uF or greater, the output
capacitor should have an ESR less than 2 ohm. This will improve transient response as well as promoted stability.
Ultra low ESR capacitors (<100mohm), such as ceramic chip capacitors may promote instability. These very low
ESR levels may cause an oscillation and/or under damped transient response. A low ESR solid tantalum capacitor
works extremely well and provides good transient response and stability over temperature. Aluminum electrolytic
can also be used, as long as the ESR of the capacitor is <2ohm. The value of the output capacitor can be
increased without limit. Higher capacitance values help to improved transient response and ripple rejection and
reduce output noise.
Minimum Load Current
The TS2937 series is specified between finite loads. If the output current is too small leakage currents dominate
and the output voltage rises. A 1mA minimum load current is necessary for proper regulation.
Input Capacitor
An input capacitor of 1uF or greater is recommended when the device is more that 4 inches away from the bulk AC
supply capacitance or when the supply is a battery. Small and surface mount ceramic chip capacitors can be used
for bypassing. Larger values will help to improve ripple rejection by bypassing the input to the regulator, further
improving the integrity of the output voltage.
3/10 Version: D13


TS2937 電子部品, 半導体
500mA Ultra Low Dropout Voltage Regulator
TO-220 Mechanical Drawing
Unit: Millimeters
Marking Diagram
Y = Year Code
M = Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L = Lot Code
XX = Voltage Code
(3.3=3.3V, 5.0=5V, 12=12V)
6/10 Version: D13

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