TAIWAN SEMICONDUCTOR 500mA Ultra Low Dropout Voltage Regulator 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 • Dropout voltage typically 0.6V @ Io=500mA • Output voltage trimmed before assembly • -18V Reverse peak voltage • +30V Input over voltage protection • +60V T ransient peak voltage • Internal current limit • Thermal shutdown protection application • Post Regulator for SMPS • Industrial Instrumentation RoHS h§logen pb-Free COMPLIANT FREE typical application circuit

TAIWAN SEMICONDUCTOR TS2937Taiwan Semiconductor absolute maximum ratings <Note 1) thermal performance Notes: R©ja is the sum of the junction-to-case and case-to-ambient thermal resistances. The case thermal reference is defined at the solder mounting surface of the drain pins. R©ja is guaranteed by design while R©ca is determined by the user’s board design. R©ja shown below for single device operation on FR-4 PCB in still air. electrical specifications (Vin=Vout+1V, IL=5mA, Co=10uF, Ta=25oC, unless otherwise noted)

TAIWAN SEMICONDUCTOR TS2937Taiwan Semiconductor electrical specifications 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. 2. Maximum positive supply voltage of 60V must be limited duration (<100ms) and duty cycle (<1%). 3. The maximum allowable power dissipation is a function of the maximum junction temperature, Tj, the junction to ambient thermal resistance, R©ja, and the ambient temperature, Ta. Exceeding the maximum allowable power dissipation will cause excessive die...

TS2937 Taiwan Semiconductor BLOCK DIAGRAM 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...

TS2937 Taiwan Semiconductor APPLICATION INFORMATION (CONTINUED) Thermal Characteristics A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of the application. Under all possible operating conditions, the junction temperature must be within the range specified under absolute maximum ratings. To determine if the heatsink is required, the power dissipated by the regulator, PD must be calculated. The below formula shows the voltages and currents for calculating the PD in the regulator: IIN = IL / IG PD = (VIN-VOUT) * IL + (VIN) * IG Ex. PD = (3.3V-2.5V)...

TS2937 Taiwan Semiconductor PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) TO-220 = Voltage Code ( 50=5.0V, 33=3.3V ) 33 =3.3V 50 =5.0V = Year Code = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr S =May T =Jun U =Jul V =Aug W =Sep X =Oct Y =Nov Z =Dec = Lot Code

TAIWAN SEMICONDUCTOR TS2937Taiwan Semiconductor package outline dimensions (Unit: Millimeters) SUGGESTED PAD LAYOUT (Unit: Millimeters) marking diagram XX = Voltage Code ( 50=5.0V, 33=3.3V ) 33 =3.3V 50 =5.0V Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr

TAIWAN SEMICONDUCTOR TS2937Taiwan Semiconductor package outline dimensions (Unit: Millimeters) SUGGESTED PAD LAYOUT (Unit: Millimeters) marking diagram XX = Voltage Code ( 50=5.0V, 33=3.3V ) 33 =3.3V 50 =5.0V Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr

TAIWAN SEMICONDUCTOR TS2937Taiwan Semiconductor package outline dimensions (Unit: Millimeters) SOT-223 SUGGESTED PAD LAYOUT (Unit: Millimeters) marking diagram XX = Voltage Code ( 50=5.0V, 33=3.3V ) 33 =3.3V 50 =5.0V Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr

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