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| LK112xx Low noise low drop voltage regulator with shutdown function Features Output current up to 150 mA Low dropout voltage (350 mV at IOUT = 50 mA) Very low quiescent current: 0.1 A in OFF mode and max. 250 A in ON mode at IOUT = 0 mA Low output noise: typ 30 V at IOUT = 60 mA and 10 Hz < f < 80 kHz Wide range of output voltages 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) The LK112xx has a very low quiescent current in ON MODE while in OFF MODE the Iq is reduced down to 100 nA max. The internal thermal shutdown circuitry limits the junction temperature to below 150 C. The load current is internally monitored and the device will shutdown in the presence of a short circuit or overcurrent condition at the output. SOT23-5L Description The LK112xx 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 used connected to the noise bypass pin to lower the output noise level to 30 Vrms. An internal PNP pass transistor is used to achieve a low dropout voltage. Table 1. Device summary Part numbers LK112XX14 LK112XX15 LK112XX18 LK112XX19 LK112XX20 LK112XX22 LK112XX23 LK112XX24 LK112XX25 LK112XX26 LK112XX29 LK112XX31 LK112XX33 LK112XX34 LK112XX35 LK112XX37 LK112XX39 LK112XX41 LK112XX42 LK112XX43 LK112XX44 LK112XX45 LK112XX46 LK112XX48 LK112XX49 LK112XX50 LK112XX60 LK112XX80 July 2008 Rev 15 1/17 www.st.com 17 Contents LK112xx Contents 1 2 3 4 5 6 7 8 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 LK112xx Diagram 1 Figure 1. Diagram Schematic diagram 3/17 Pin configuration LK112xx 2 Figure 2. Pin configuration Pin connection (top view) Table 2. Pin n 1 2 3 4 5 Pin description Symbol SHDN GND Bypass OUT IN Note Shutdown input: disables the regulator when 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: bypass with 0.1 F to improve the VREF thermal noise performances. Output port Input port 4/17 LK112xx Maximum ratings 3 Table 3. Maximum ratings Absolute maximum ratings Parameter DC input voltage DC input voltage Output current Storage temperature range Operating junction temperature range Value 16 16 Internally limited -55 to 150 -40 to 125 C C Unit V V Symbol VI VSHDN IO TSTG TOP Table 4. Symbol RthJC RthJA Thermal data Parameter Thermal resistance junction-case Thermal resistance junction-ambient SOT23-5L 81 255 Unit C/W C/W 5/17 Electrical characteristics LK112xx 4 Table 5. Symbol Iq VO VO VO Electrical characteristics Electrical characteristics for LK112 (TJ = 25 C, VIN = VOUT + 1 V (1), IOUT = 0 mA, VSHDN = 1.8 V, CI = 1 F, CO = 2.2 F, CBYPASS = 0.1 F unless otherwise specified) Parameter Quiescent current Output voltage Line regulation Test conditions ON MODE (except ISHDN) OFF MODE, VI = 8V, VSHDN = 0V IO = 30mA VI = VO+1V to VO+6V, VO 5.6V VI = VO+1V to VO+6V, VO > 5.6V IO = 1 to 60mA IO = 1 to 150mA Dropout voltage Output current limit Supply voltage rejection Output noise voltage Shutdown input current Shutdown input logic Output OFF Output voltage temperature coefficient IO = 10mA 0.09 0.6 mV/C VI = VO+1.5V, CBYP = 0.1F CO = 10F, f = 400Hz, IO = 30mA B= 10Hz to 80kHz, CBYP = 0.1F CO = 10F, VI = VO+1.5V, IO = 60mA VSHDN = 1.8V, Output ON Output ON 1.8 V IO = 60 mA (2) IO = 150 mA (2) Min. Typ. 175 0 (see table) 0.7 0.8 15 25 0.17 0.29 Max. 250 0.1 Unit A A 20 40 30 90 0.24 0.35 mV mV mV mV V V mA Load regulation Vd IO SVR eN ISHDN VSHDN VO/TJ 150 55 30 12 35 dB Vrms A 1. For version with output voltage less than 2 V, VIN = 2.4 V 2. Only for version with output voltage more than 2.1 V 6/17 LK112xx Typical characteristics 5 Figure 3. Typical characteristics (Unless otherwise specified, TJ = 25 C, CI = 1 F, CO = 2.2 F, CBYP = 100 nF) Output voltage vs temperature Figure 4. Output voltage vs temperature Figure 5. Line regulation vs temperature Figure 6. Load regulation vs temperature Figure 7. Dropout voltage vs temperature Figure 8. Short circuit current vs dropout voltage 7/17 Typical characteristics LK112xx Figure 9. Output voltage vs input voltage Figure 10. Shutdown voltage vs temperature Figure 11. Shutdown current vs shutdown voltage Figure 12. Supply voltage rejection vs temperature Figure 13. Supply voltage rejection vs output current Figure 14. Supply voltage rejection vs frequency 8/17 LK112xx Typical characteristics Figure 15. Supply voltage rejection vs temperature Figure 16. Quiescent current vs temperature Figure 17. Quiescent current vs input voltage Figure 18. Quiescent current vs shutdown voltage Figure 19. Quiescent current vs output current Figure 20. Reverse current vs reverse voltage 9/17 Typical characteristics LK112xx Figure 21. Stability Figure 22. Spectrum noise Figure 23. Start-up transient Figure 24. Start-up transient VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=2.5k, CI=1F, CO=4.7F, CBYP=10nF VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=68, CI=1F, CO=4.7F, CBYP=100nF Figure 25. Line transient Figure 26. Line transient VI=3.5 to 4.5V, VO=2.5V, VSHDN= 1.8V, IO=30mA, no CI, CO=100F, CBYP=10nF, ts=tf=2s VI=3.5 to 4.5V, VO=2.5V, VSHDN= 1.8V, IO=30mA, no CI, CO=10F, CBYP=10nF, ts=tf=2s 10/17 LK112xx Figure 27. Line transient Typical characteristics Figure 28. Load transient VI=3.5 to 4.5V, VO=2.5V, VSHDN= 1.8V, IO=30mA, no CI, CO=1F, CBYP=1nF, ts=tf=2s VI=3.5V, VO=2.5V, VSHDN= 1.8V, IO=50 to 100mA, CI=1F, CO=2.2F, CBYP=10nF, ts=tf=250ns Figure 29. Load transient Figure 30. Load transient VI=3.5V, VO=2.5V, VSHDN= 1.8V, IO=50 to 100mA, CI=1F, CO=10F, CBYP=100nF, ts=tf=250ns VI=4.8V, VO=3.8V, VSHDN= 1.8V, IO=50 to 100mA, CI=1F, CO=2.2F, CBYP=10nF, ts=tf=250ns 11/17 Package mechanical data LK112xx 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 12/17 LK112xx Package mechanical data SOT23-5L mechanical data mm. Dim. Min. A A1 A2 b C D E e H L 2.60 0.10 0.90 0.00 0.90 0.35 0.09 2.80 1.50 0.95 3.00 0.60 102.3 3.9 Typ. Max. 1.45 0.10 1.30 0.50 0.20 3.00 1.75 Min. 35.4 0.0 35.4 13.7 3.5 110.2 59.0 37.4 118.1 23.6 Typ. Max. 57.1 3.9 51.2 19.7 7.8 118.1 68.8 mils. 7049676D 13/17 Package mechanical data LK112xx Tape & reel SOT23-xL mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 3.13 3.07 1.27 3.9 3.9 3.23 3.17 1.37 4.0 4.0 12.8 20.2 60 14.4 3.33 3.27 1.47 4.1 4.1 0.123 0.120 0.050 0.153 0.153 0.127 0.124 0.054 0.157 0.157 13.0 Typ. Max. 180 13.2 0.504 0.795 2.362 0.567 0.131 0.128 0.0.58 0.161 0.161 0.512 Min. Typ. Max. 7.086 0.519 inch. 14/17 LK112xx Order codes 7 Table 6. Order codes Order codes Output voltage 1.4V 1.5V 1.8V 1.9V 2.0V 2.2V 2.3V 2.4V 2.5V 2.6V 2.9V 3.1V 3.3V 3.4V 3.5V 3.7V 3.9V 4.1V 4.2V 4.3V 4.4V 4.5V 4.6V 4.8V 4.9V 5.0V 6.0V 8.0V VOUT Min 1.34V 1.44V 1.74V 1.84V 1.94V 2.14V 2.24V 2.34V 2.44V 2.54V 2.84V 3.04V 3.24V 3.335V 3.435V 3.630V 3.825V 4.020V 4.120V 4.215V 4.315V 4.410V 4.510V 4.705V 4.800V 4.900V 5.880V 7.840V VOUT Max 1.46V 1.56V 1.86V 1.96V 2.06V 2.26V 2.36V 2.46V 2.56V 2.66V 2.96V 3.16V 3.36V 3.465V 3.565V 3.770V 3.975V 4.180V 4.280V 4.385V 4.485V 4.590V 4.690V 4.895V 5.000V 5.100V 6.120V 8.160V Test voltage 2.4V 2.4V 2.4V 2.4V 3.0V 3.2V 3.3V 3.4V 3.5V 3.6V 3.9V 4.1V 4.3V 4.4V 4.5V 4.7V 4.9V 5.1V 5.2V 5.3V 5.4V 5.5V 5.6V 5.8V 5.9V 6.0V 7.0V 9.0V Part number LK112M14TR (1) LK112M15TR LK112M18TR LK112M19TR LK112M20TR (1) (1) LK112M22TR (1) LK112M23TR LK112M24TR (1) (1) LK112M25TR LK112M26TR (1) LK112M29TR LK112M31TR (1) (1) LK112M33TR LK112M34TR (1) LK112M35TR LK112M37TR LK112M39TR (1) (1) (1) LK112M41TR (1) LK112M42TR LK112M43TR LK112M44TR (1) (1) (1) LK112M45TR (1) LK112M46TR LK112M48TR LK112M49TR (1) (1) (1) LK112M50TR LK112M60TR LK112M80TR 1. Available on request. 15/17 Revision history LK112xx 8 Table 7. Date Revision history Document revision history Revision 8 9 10 11 12 13 14 15 Change maturity code. Order codes updated and new template. The TOP value on table 2 has been updated. Add Table 1 in cover page. Features updated. Modified: Table 6. Modified: Table 6 on page 15. Modified: Table 1 on page 1 and Table 6 on page 15. Changes 31-Jan-2005 13-Jun-2006 17-Oct-2006 18-Jul-2007 21-Sep-2007 11-Dec-2007 12-Feb-2008 10-Jul-2008 16/17 LK112xx 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. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER'S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. (c) 2008 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 17/17 |
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