LK112SM18TR

LK112S Low noise and low drop voltage regulator with shutdown function Datasheet - production data Description The LK112S is a low-dropout linear regulator with shutdown function. The internal switch can be controlled by TTL or CMOS logic levels. The device is ON when the control pin is pulled to a high logic 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. SOT23-5L Features • Output current up to 200 mA • Low-dropout voltage (500 mV max. at IOUT = 200 mA) • Very low quiescent current: 0.1 µA in OFF mode and max. 250 µA in ON mode at IOUT = 0 mA The LK112S has a very low quiescent current in ON mode while in OFF mode the Iq is reduced to 100 nA max. The internal thermal shutdown circuitry limits the junction temperature below 150 °C. The load current is internally monitored and in the presence of a short-circuit or overcurrent conditions at the output, the device shuts down. • Low output noise: typ. 30 µV at IOUT = 60 mA and 10 Hz < f < 80 kHz • Wide range of output voltages • Internal current and thermal limit • VOUT tolerance ± 2% (at 25 °C) • 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) Table 1. Device summary Part number Output voltage LK112SM18TR 1.8 V LK112SM33TR 3.3 V LK112SM50TR 5.0 V February 2014 This is information on a product in full production. DocID8059 Rev 12 1/17 www.st.com Contents LK112S Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 DocID8059 Rev 12 LK112S 1 Diagram Diagram Figure 1. Schematic diagram DocID8059 Rev 12 3/17 17 Pin configuration 2 LK112S Pin configuration Figure 2. Pin connection (top view) Table 2. Pin description 4/17 Pin n° Symbol Note 1 SHDN Shutdown input disables the regulator when it is connected to GND or to a positive voltage lower than 0.6 V 2 GND Ground pin: internally connected to the die attach flag to decrease the total thermal resistance and increase the package ability to dissipate power 3 Bypass 4 OUT 5 IN Bypass pin: 0.1 µF bypass to improve the thermal noise performance Output port Input port DocID8059 Rev 12 LK112S 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 DocID8059 Rev 12 5/17 17 Electrical characteristics 4 LK112S 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. LK112S electrical characteristics Symbol Parameter Id Quiescent current VO Output voltage ΔVO Line regulation ΔVO Load regulation Vd Dropout voltage ISC Short-circuit current Test conditions Min. ON mode (except ISHDN) OFF mode, VI = 8 V, VSHDN = 0 V IO = 30 mA Typ. Max. Unit 175 250 µA 0 0.1 µA +2 % -2 VI = VO+1 V to VO+6 V, VO ≤ 5.6 V 0.7 20 mV VI = VO+1 V to VO+6 V, VO > 5.6 V 0.8 40 mV IO = 1 to 60 mA 15 30 mV IO = 1 to 200 mA 30 90 mV 0.17 0.24 V 0.35 0.5 V IO = 60 mA IO = 200 mA(1) 200 mA Supply voltage rejection VI = VO+1.5 V, CBYP = 0.1 µF CO = 10 µF, f = 400 Hz, IO = 30 mA 55 dB Output noise voltage B= 10 Hz to 80 kHz, CBYP = 0.1 µF CO = 10 µF, VI = VO+1.5 V, IO = 60 mA 30 µVrms ISHDN Shutdown input current VSHDN = 1.8 V, output ON 12 VSHDN Shutdown input logic ΔVO/TJ Output voltage temperature coefficient SVR eN Output ON 6/17 µA 1.8 V Output OFF IO = 10 mA 1. For versions with an output voltage higher than 2.1 V only. Note: 35 For versions with an output voltage lower than 2 V VIN = 2.4 V DocID8059 Rev 12 0.6 0.09 mV/°C LK112S 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 Figure 4. Output voltage vs temperature Vout=2.5 V Vout=3.8 V Figure 5. Line regulation vs temperature Figure 6. Load regulation vs temperature DocID8059 Rev 12 7/17 17 Typical characteristics LK112S 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 8/17 Figure 12. Supply voltage rejection vs temperature DocID8059 Rev 12 LK112S Typical characteristics Figure 13. Supply voltage rejection vs output current Figure 14. Supply voltage rejection vs frequency Figure 15. Supply voltage rejection vs temperature Figure 16. Shutdown current vs temperature Figure 17. Quiescent current vs input voltage Figure 18. Quiescent current vs shutdown voltage DocID8059 Rev 12 9/17 17 Typical characteristics LK112S Figure 19. Quiescent current vs temperature 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 10/17 VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=68Ω, CI=1µF, CO=4.7µF, CBYP=100nF DocID8059 Rev 12 LK112S 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 29. Load transient Vo=2.5 V, Co=10 µF VI=3.5V, VO=2.5V, VSHDN= 1.8V, IO=50 to 100mA, CI=1µF, CO=10µF, CBYP=100nF, ts=tf=250ns 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 Vo=2.5 V, Co=2.2 µF VI=3.5V, VO=2.5V, VSHDN= 1.8V, IO=50 to 100mA, CI=1µF, CO=2.2µF, CBYP=10nF, ts=tf=250ns Figure 30. Load transient Vo=3.8 V,Co=2.2 µF VI=4.8V, VO=3.8V, VSHDN= 1.8V, IO=50 to 100mA, CI=1µF, CO=2.2µF, CBYP=10nF, ts=tf=250ns DocID8059 Rev 12 11/17 17 Package mechanical data 6 LK112S 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 12/17 DocID8059 Rev 12 LK112S Package mechanical data 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 DocID8059 Rev 12 13/17 17 Packaging mechanical data 7 LK112S Packaging mechanical data Figure 33.SOT23-5L tape and reel drawings 14/17 DocID8059 Rev 12 LK112S Packaging mechanical data Figure 34.SOT23-5L tape and reel mechanical data mm Dim. Min. Typ. A Max. 180 C 12.8 D 20.2 N 60 13.0 T 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 DocID8059 Rev 12 15/17 17 Revision history 8 LK112S Revision history Table 7. Document revision history Date Revision 31-Aug-2004 3 Mistake on fig. 19. 31-Jan-2005 4 Change maturity code. 12-Jun-2006 5 Order codes updated. 17-Oct-2006 6 The TOP value on table 2 updated. 20-Jul-2007 7 Add Table 1 in cover page. 21-Sep-2007 8 Features updated. 11-Dec-2007 9 Modified: Table 6. 12-Feb-2008 10 Modified: Table 6. 10-Jul-2008 11 Modified: Table 1 and Table 6. 12 Part number LK112Sxx changed to LK112S. Updated the title and the Description in cover page, Table 2: Pin description, Section 5: Typical characteristics and Section 6: Package mechanical data. Added Section 7: Packaging mechanical data. Minor text changes. 11-Feb-2014 16/17 Changes DocID8059 Rev 12 LK112S 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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