LK112M40TR

LK112 Low noise and low drop voltage regulator with shutdown function Datasheet - production data • Internal current and thermal limit • Operative input voltage from: – VOUT + 0.5 to 14 V (for VOUT > 2 V) or from 2.5 V to 14 V (for VOUT < 2 V) Description SOT23-5L Features • Output current up to 150 mA • Low-dropout voltage (350 mV at IOUT = 150 mA) • Very low quiescent current: – 0.1 µA in OFF mode and max. 250 µA in ON mode at IOUT = 0 mA • Low output noise: – typ. 30 µV at IOUT = 60 mA and 10 Hz < f < 80 kHz The LK112 is a low-dropout linear regulator with a built-in electronic switch. The internal switch can be controlled by TTL or CMOS logic levels. The device is on-state when the control pin is pulled to a logic high level. An external capacitor can be connected to the noise bypass pin to reduce the output noise level to 30 µVrms. An internal PNP pass transistor is used to achieve a low-dropout voltage. The LK112 has a very low quiescent current in on mode while in off mode Iq is reduced below 100 nA max. The internal thermal shutdown circuitry limits the junction temperature below 150 °C. Load current is internally monitored and the device shuts down in the presence of a short-circuit or overcurrent condition on the output. • Wide range of output voltages Table 1. Device summary Order codes Output voltages LK112M15TR 1.5V LK112M18TR 1.8V LK112M25TR 2.5V LK112M33TR 3.3V LK112M50TR 5.0V LK112M55TR 5.5V LK112M60TR 6.0V LK112M80TR 8.0V April 2014 This is information on a product in full production. DocID7362 Rev 17 1/18 www.st.com Contents LK112 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2/18 DocID7362 Rev 17 LK112 1 Diagram Diagram Figure 1. Schematic diagram DocID7362 Rev 17 3/18 18 Pin configuration 2 LK112 Pin configuration Figure 2. Pin connection (top view) Table 2. Pin description Pin n° Symbol 1 SHDN 2 GND 3 Bypass 4 OUT 5 IN 4/18 Note Shutdown input disables the regulator when it is connected to GND or to positive voltage less than 0.6 V Ground pin internally connected to the die attach flag to decrease the total thermal resistance and increase the package ability to dissipate power Bypass pin with 0.1 µF to improve the noise performance Output port Input port DocID7362 Rev 17 LK112 Maximum ratings 3 Maximum ratings Table 3. Absolute maximum ratings Symbol Parameter Value Unit VI DC input voltage 16 V VSHDN DC input voltage 16 V IO Output current Internally limited TSTG Storage temperature range -55 to 150 °C TOP Operating junction temperature range -40 to 125 °C Table 4. Thermal data Symbol Parameter SOT23-5L Unit RthJC Thermal resistance junction-case 81 °C/W RthJA Thermal resistance junction-ambient 255 °C/W DocID7362 Rev 17 5/18 18 Electrical characteristics 4 LK112 Electrical characteristics TJ = 25 °C, VIN = VOUT + 1 V, IOUT = 0 mA, VSHDN = 1.8 V, CI = 1 µF, CO = 2.2 µF, CBYPASS = 0.1 µF unless otherwise specified. Table 5. LK112 electrical characteristics Symbol Parameter Iq Quiescent current VO Output voltage ΔVO Line regulation ΔVO Load regulation Test conditions Min. On mode (except ISHDN) Off mode, VI = 8V, VSHDN = 0V Vd Dropout voltage IO Output current limit IO = 30mA Typ. Max. Unit 175 250 µA 0 0.1 µA +2 % -2 VI = VO+1V to VO+6V, VO ≤ 5.6V 0.7 20 mV VI = VO+1V to VO+6V, VO > 5.6V 0.8 40 mV IO = 1 to 60mA 15 30 mV IO = 1 to 150mA 25 90 mV 0.17 0.24 V 0.29 0.35 V IO = 60mA (1) IO = 150mA (1) 150 mA Supply voltage rejection VI = VO+1.5V, CBYP = 0.1µF CO = 10µF, f = 400Hz, IO = 30mA 55 dB Output noise voltage B= 10Hz to 80kHz, CBYP = 0.1µF CO = 10µF, VI = VO+1.5V, IO = 60mA 30 µVrms ISHDN Shutdown input current VSHDN = 1.8V, output on 12 VSHDN Shutdown input logic ΔVO/TJ Output voltage temperature coefficient SVR eN Output on 6/18 µA 1.8 V Output off IO = 10mA 1. For versions with output voltage more than 2.1 V only. Note: 35 For version with output voltage less than 2 V, VIN = 2.4 V. DocID7362 Rev 17 0.6 0.09 mV/°C LK112 5 Typical characteristics Typical characteristics Unless otherwise specified, TJ = 25 °C, CI = 1 µF, CO = 2.2 µF, CBYP = 100 nF Figure 3. Output voltage vs. temperature (VO= 2.5V) Figure 4. Output voltage vs. temperature (VO= 3.8V) Figure 5. Line regulation vs. temperature Figure 6. Load regulation vs. temperature DocID7362 Rev 17 7/18 18 Typical characteristics LK112 Figure 7. Dropout voltage vs. temperature Figure 8. Short-circuit current vs. dropout voltage Figure 9. Output voltage vs. input voltage Figure 10. Shutdown voltage vs. temperature 2.5 V 2V 30 mA Figure 11. Shutdown current vs. shutdown voltage 8/18 Figure 12. Supply voltage rejection vs. temperature (VO= 2.5V) DocID7362 Rev 17 LK112 Typical characteristics Figure 13. Supply voltage rejection vs. output current Figure 14. Supply voltage rejection vs. frequency Figure 15. Supply voltage rejection vs. temperature (VO= 3.8V) Figure 16. Quiescent current vs. temperature Figure 17. Quiescent current vs. input voltage Figure 18. Quiescent current vs. shutdown voltage DocID7362 Rev 17 9/18 18 Typical characteristics LK112 Figure 19. Quiescent current vs. output current Figure 20. Reverse current vs. reverse voltage Figure 21. Stability Figure 22. Noise spectrum Figure 23. Start-up transient (CBYP = 10 nF) Figure 24. Start-up transient (CBYP = 100 nF) VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=2.5kΩ, CI=1µF, CO=4.7µF, CBYP=10nF 10/18 VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=68Ω, CI=1µF, CO=4.7µF, CBYP=100nF DocID7362 Rev 17 LK112 Typical characteristics Figure 25. Line transient (Co = 100 µF) VI=3.5 to 4.5V, VO=2.5V, VSHDN= 1.8V, IO=30mA, no CI, CO=100µF, CBYP=10nF, ts=tf=2µs Figure 27. Line transient (Co = 1 µF) VI=3.5 to 4.5V, VO=2.5V, VSHDN= 1.8V, IO=30mA, no CI, CO=1µF, CBYP=1nF, ts=tf=2µs Figure 26. Line transient (Co = 10 µF) VI=3.5 to 4.5V, VO=2.5V, VSHDN= 1.8V, IO=30mA, no CI, CO=10µF, CBYP=10nF, ts=tf=2µs Figure 28. Load transient (Co = 2.2 µF, CBYP = 10 nF) VI=3.5V, VO=2.5V, VSHDN= 1.8V, IO=50 to 100mA, CI=1µF, CO=2.2µF, CBYP=10nF, ts=tf=250ns DocID7362 Rev 17 11/18 18 Typical characteristics LK112 Figure 29. Load transient (Co = 10 µF, CBYP = 100 nF) VI=3.5V, VO=2.5V, VSHDN= 1.8V, IO=50 to 100mA, CI=1µF, CO=10µF, CBYP=100nF, ts=tf=250ns 12/18 Figure 30. Load transient (Vo = 3.8 V) VI=4.8V, VO=3.8V, VSHDN= 1.8V, IO=50 to 100mA, CI=1µF, CO=2.2µF, CBYP=10nF, ts=tf=250ns DocID7362 Rev 17 LK112 6 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 31.SOT23-5L mechanical drawings BN DocID7362 Rev 17 13/18 18 Package mechanical data LK112 Table 6. SOT23-5L mechanical data mm Dim. Min. Typ. Max. A 0.90 1.45 A1 0 0.15 A2 0.90 1.30 b 0.30 0.50 c 2.09 0.20 D 2.95 E 1.60 e 0.95 H 2.80 L 0.30 0.60 θ 0 8 Figure 32. SOT23-5L recommended footprint (dimensions in mm) BN 14/18 DocID7362 Rev 17 LK112 7 Packaging mechanical data Packaging mechanical data Figure 33.Tape and reel SOT23-5L mechanical drawings DocID7362 Rev 17 15/18 18 Packaging mechanical data LK112 Figure 34. Tape and reel SOT23-5L mechanical data mm Dim. Min. Typ. A 180 C 12.8 D 20.2 N 60 13.0 T 16/18 Max. 13.2 14.4 Ao 3.13 3.23 3.33 Bo 3.07 3.17 3.27 Ko 1.27 1.37 1.47 Po 3.9 4.0 4.1 P 3.9 4.0 4.1 DocID7362 Rev 17 LK112 8 Revision history Revision history Table 7. Document revision history Date Revision 31-Jan-2005 8 Change maturity code. 13-Jun-2006 9 Order codes updated and new template. 17-Oct-2006 10 The TOP value on table 2 has been updated. 18-Jul-2007 11 Add Table 1 in cover page. 21-Sep-2007 12 Features updated. 11-Dec-2007 13 Modified: Table 1. 12-Feb-2008 14 Modified: Table 1. 10-Jul-2008 15 Modified: Table 1 and Table 1 on page 1. 28-Feb-2011 16 Modified: Table 1. 17 Changed the part number LK112xx to LK112. Updated the Title in cover page and Table 1: Device summary. Updated the features and description in cover page, Table 2: Pin description, Figure 3: Output voltage vs. temperature (VO= 2.5V), Figure 4: Output voltage vs. temperature (VO= 3.8V), Section 5: Typical characteristics, Section 6: Package mechanical data. Added Section 7: Packaging mechanical data. Minor text changes. 24-Apr-2014 Changes DocID7362 Rev 17 17/18 18 LK112 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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