TS2938 Taiwan Semiconductor 500mA Ultra Low Dropout Voltage Regulator With Inhibit Function DESCRIPTION FEATURES The TS2938 series of fixed-voltage monolithic micro- Dropout voltage typically 0.5V Io=500mA power voltage regulators is designed for a wide range of Output current up to 500mA applications. This device excellent choice of use in Logic Control Electronic Shutdown battery-power application. Furthermore, the quiescent Output voltage trimmed before assembly current increases on slightly at dropout, which prolongs -18V Reverse peak voltage battery life. This series of fixed-voltage regulators +30V Input over voltage protection features very low ground current (200A Typ.), very low +60V Transient peak voltage drop output voltage (Typ. 60mV at light load and 600mV Low Quiescent Current 100A (Typ.) (On Mode) at 500mA) and output inhibit control. This includes a Internal current limit tight initial tolerance of 2%, extremely good line Thermal shutdown protection regulation of 0.05% typ., and very low output APPLICATION temperature coefficient. Telecommunication SOP-8 Pin Definition: 1. Output 5. Inhibit 2. Ground 6. Ground 3. Ground 7. Ground 4. NC 8. Input Notes: Moisture sensitivity level: level 3. Per J-STD-020 TYPICAL APPLICATION CIRCUIT Document Number: DS P0000209 1 Version: G15 TS2938 Taiwan Semiconductor (Note 1) ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL LIMIT UNIT (Note 2) -18 ~ +60 V Input Supply Voltage V IN V Operation Input Supply Voltage V 26 OPR (Note 3) Power Dissipation P Internally Limited W D o -40 ~ +125 Operating Junction Temperature Range T C J o T -65 ~ +150 C Storage Temperature Range STG THERMAL PERFORMANCE PARAMETER SYMBOL LIMIT UNIT Junction to Case Thermal Resistance R 20 C/W JC Notes: R is the sum of the junction-to-case and case-to-ambient thermal resistances. The case thermal reference is defined JA at the solder mounting surface of the drain pins. R is guaranteed by design while R is determined by the users board JA CA design. R shown below for single device operation on FR-4 PCB in still air. JA ELECTRICAL SPECIFICATIONS o (V =V +1V, I =5mA, C =10F, T =25 C, unless otherwise noted) IN OUT L O A PARAMETER CONDITIONS MIN TYP MAX UNIT 3.23 3.3 3.36 o T =25 C A 4.9 5 5.1 Output Voltage V 3.17 3.3 3.43 o T =25~85 C A 4.8 5 5.2 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 -- 100 200 L (Note 4) Dropout Voltage I =300mA -- 300 400 mV L I =500mA -- 500 600 L I =100A -- 200 300 A L (Note 5) Quiescent Current I =300mA -- 12 20 L mA I =500mA -- 25 50 L (Note 6) V =0 Short Circuit Current -- 0.9 1.3 A OUT C =2.2F -- 500 -- L Output Noise, C =3.3F -- 350 -- Vrms L 10Hz to 100KHz, I =10mA L C =33F -- 120 -- L Ratio Ripple Rejection 60 -- -- dB Document Number: DS P0000209 2 Version: G15