TS2937 500mA Ultra Low Dropout Fixed Positive Voltage Regulator TO-263 Low Dropout Voltage 0.6V max. Pin assignment: 1. Input 2. Ground 3. Output 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 +30V Input over voltage protection Output current up to 500mA +60V Transient peak voltage Output voltage trimmed before assembly Internal current limit -18V Reverse peak voltage Thermal shutdown protection Block Diagram Ordering Information Part No. Operation Temp. Package (Ambient) TS2937CZ-xx T O-220 o TS2937CM-xx T-20 ~ +85 C O-263 TS2937CP-xx TO-252 TS2937CW-xx SOT-223 Note: Where xx denotes voltage option, available are 5.0V, 3.3V, 2.5V and 1.8V. Contact factory for additional voltage options. 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) P Internally Limited W D o Operating Junction Temperature Range T -25 ~ +150 C J o Storage Temperature Range T -65 ~ +150 C STG o Lead Soldering Temperature (260 C) TO-220 / TO-263 Package 5 S TO-252 / SOT-223 Package 4 TS2937 1-6 2003/12 rev. A Electrical Characteristics o Vin = Vout + 1V, I = 5mA, C = 10uF, Ta = 25 C, unless otherwise specified. L o Parameter Conditions Min Typ Max Unit Output Voltage 0.990 Vo 5.0 / 3.3 1.010 Vo V Output Voltage 5mA I 500mA, 0.980 Vo 2.5 / 1.8 1.020 Vo V L Vo+1V Vin 26V Input Supply Voltage -- -- 26 V o Output Voltage Temperature -- 50 150 ppm/ C Coefficient Line Regulation Vo+1V Vin 26V -- 0.05 0.5 % Load Regulation 5mA I 500mA -- 0.2 1.0 % L Dropout Voltage (Note 4) I =100mA -- 100 200 L I =300mA -- 300 400 mV L I =500mA -- 500 600 L Quiescent Current (Note 5) I =100uA -- 100 -- uA L I =300mA -- 12 -- mA L I =500mA -- 25 -- L Short Circuit Current (Note 6) Vout=0 -- -- 1.3 A Output Noise, C =2.2uF -- 500 -- L 10Hz to 100KHz, I =10mA C =3.3uF -- 350 -- uVrms L L C =33uF -- 120 -- L Thermal Performance Condition Package type Typ Unit Thermal Resistance TO-220 60 o Junction to Ambient C/W TO-263 80 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 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. TS2937 2-6 2003/12 rev. A