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ST LK112S SERIES handbook

1. 0 2 4 B 10 12 14 16 18Co uF Figure 20 Spectrum Noise N 501430 lg260mA 3 8 Vo V 1V 500 VsHon 4V 2 5 400 NO C 300 2s 200 Vo 3 8V Cayp 100nF 100 2 2 5 0 0 10 20 30 40 50 60 70 f KHz Figure 21 Start up Transient Average F X 2 1 1 ES T H i n H at 1 1 t bes 1 1 a 1 1 E Vi 3 5V Vo 2 5V Vgupw 0 to 1 8V RL 2 5KQ Co 4 7uF Cpy 1 OnF ky LK112S SERIES Figure 22 Start up Transient dome dean nm n Average ER peer i Een er 100Y J 3 2 5 0 to 1 8V R_ 68Q Co 4 7uF Cpy 100nF Figure 23 Line Transient 7394 1 Ss E Vj 3 5 to 4 5V 2 5 1 8 10 0 C Co 10pF Cpy 100nF tg tr 2us Figure 24 Line Transient Run 2 504545 Average E ett 1 1 4 4 Peer t n pede qt 1 4 4 2
2. SVR dB 60 45 50 fosc 400Hz Vo 5 8V 15 2V lg 30mA 0 25 0 25 50 75 DI Figure 14 Quiescent Current vs Temperature 501570 la uA 0 20 0 15 0 10 0 05 0 50 25 0 25 50 75 Figure 15 Quiescent Current vs Input Voltage 501580 200 150 2 5 100 Vin 3 5V 0 50 0 024 6 8 10 12 14 16 18 6 11 Figure 16 Quiescent Current vs Shutdown Voltage 501390 200 150 3 5V 100 Vo 2 5V NO LOAD 50 0 0 2 5 4 V Figure 17 Quiescent Current vs Output Current CS04590 la mA 3 8V 0 2 200 2 39 1 0 3 0 215 2 0 1 5 50 25 0 25 50 75 Figure 18 Reverse Current vs Reverse Voltage CSO1410 uA 200 20 5 8 150 100 50 0 0 2 4 8 10 12 14 ky Figure 19 Stability 504610 ESR Q Stability Zone
3. 2 48 22 5V 2p Vo 3 5V 2 44 VsHpn 1 8V lgo 30m 2 42 2 40 50 25 0 25 50 75 T C Figure 2 Output Voltage vs Temperature 501250 Vo V 5 96 3 92 3 88 3 84 3 80 3 76 372 23 8V 3 68 3 Vsupu 1 3 64 3 60 50 25 0 25 50 75 Figure 3 Line Regulation vs Temperature Line CS01260 3 5 fo 8 5V 50 25 0 25 50 75 11 2 4 11 Figure 4 Load Regulation vs Temperature Load CS04570 mV 40 3 8V Vo 2 8V 20 1 8 40 60 50 25 0 25 50 75 Figure 5 Dropout Voltage vs Temperature CS04580 0 4 Vo 2 8V loz 200mA VsHpn 2V 0 3 lo 60mA 0 2 lgo 30mA DIL lo 10mA 0 50 25 0 25 50 75 Figure 6 Short Circuit Currennt vs Dropout Voltage 0 30 501290 0 25 0 2 5 5 7 5 10 12 5 ky Figure 7 Output Voltage vs Input Voltage CSO1300 Vo V 2 5 2 0
4. 2 3V 2 24V 2 36V 3 3V LK112SM24TR 2 4 2 34V 2 46V 3 4V LK112SM25TR 2 5V 2 44V 2 56V 3 5V LK112SM26TR 2 6V 2 54V 2 66V 3 6V LK112SM27TR 2 7V 2 64V 2 76V 3 7V LK112SM28TR 2 8V 2 74V 2 86V 3 8V LK112SM29TR 2 9V 2 84V 2 96V 3 9V LK112SM30TR 3 0V 2 94V 3 06V 4 0V LK112SM31TR 3 1V 3 04V 3 16V 4 1V LK112SM32TR 3 2V 3 14V 3 26V 4 2 LK112SM33TR 3 3V 3 24V 3 36V 4 3V LK112SM34TR 3 4V 3 335V 3 465V 4 4 LK112SM35TR 3 5V 3 435V 3 565V 4 5V LK112SM36TR 3 6V 3 535V 3 655V 4 6V LK112SM37TR 3 7V 3 630V 3 770V 4 7V LK112SM38TR 3 8V 3 725V 3 875V 4 8V LK112SM39TR 3 9V 3 825V 3 975V 4 9V LK112SM40TR 4 0V 3 920V 4 080V 5 0V LK112SM41TR 4 1V 4 020V 4 180V 5 1V LK112SM42TR 4 2V 4 120V 4 280V 5 2 LK112SM43TR 4 3V 4 215V 4 385V 5 3V LK112SM44TR 4 4 4 315 4 485V 5 4V LK112SM45TR 4 5V 4 410V 4 590V 5 5V LK112SM46TR 4 6V 4 510V 4 690V 5 6V LK112SM47TR 4 7V 4 605V 4 795V 5 7V LK112SM48TR 4 8V 4 705V 4 895V 5 8V LK112SM49TR 4 9V 4 800V 5 000V 5 9V LK112SM50TR 5 0V 4 900V 5 100V 6 0V LK112SM55TR 5 5V 5 390V 5 610V 6 5V LK112M60TR 6 0V 5 880V 6 120V 7 0V LK112SM80TR 8 0V 7 840V 8 160V 9 0V Available on request 3 11 LK112S SERIES TYPICAL CHARACTERISTICS unless otherwise specified Tj 25 C Ci 1uF Co 2 2uF 100 Figure 1 Output Voltage vs Temperature 501240 2 58 2 56 2 54 2 52 2 50
5. 4 1 i CE ie et le 11 4 1 1 3 5 to 4 5V 2 5 1 8 1 No Co 10uF Cpy 10nF t s lr 2us 7 11 LK112S SERIES Figure 25 Line Transient 2 Average os HIM UN eei emer need ntn Vout Lender eden aset LECCE EI III Vi 3 5 to 4 5V Vo 2 5V Vgupy 18V lg 30mA No Co 1pF 1 nF tg ti 2us Figure 26 Load Transient Tak Run 1 00MS Average nba H H 3 5 V 2 5 Vgupw 1 8V 10 50 to 100mA 2 21 Cgy 10nF t t 250ns 8 11 Figure 27 Load Transient Run J DOMS S Average dede e d pde de i 1 Vi 3 5V Vo 2 5V 1 8 lo 50 to 100mA Co 10uF 100 t ti 250ns Figure 28 Load Transient Run 1 00 5 5 Average 1 Vj 4 8 V Vo 3 8V 1 8 10 50 to 100mA 2 21 Cgy 10nF t tj 250ns 3 SOT23 5L MECHANICAL DATA LK112S SERIES mm mils DIM MIN TYP MAX MAX A 0 90 1 45 57 1 A1 0 00 0 15 5 9 A2 0 90 1 30 51 2 b 0 35 0 50 19 7 C 0 09 0 20 7 8 D 2 80 3 00 118 1 E 2 60 3 00 118 1 E1 1 50 1 75 68 8 e 0 95 1 1 9 L 0 35
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7. 0 55 21 6 A A 1 4 E S PEE S A lt gt 9 11 LK112S SERIES Tape amp Reel SOT23 xL MECHANICAL DATA mm inch A 180 7 086 C 12 8 13 0 13 2 0 504 0 512 0 519 D 20 2 0 795 N T Ao 0 123 0 127 0 131 Bo 0 120 0 124 0 128 Ko 1 27 1 37 1 47 0 050 0 054 0 0 58 Po 3 9 4 0 4 1 0 153 0 157 0 161 P 3 9 4 0 4 1 0 153 0 157 0 161 Ko Ao P Note Drawing not in scale 10 1 LK112S SERIES Information furnished is believed to be accurate and reliable However STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics Specifications mentioned in this publication are subject to change without notice This publication supersedes and replaces all information previously supplied STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics The ST logo is a registered trademark of STMicroelectronics 2003 STMicroelectronics
8. Vo 3 5V VsHon 2V Ip 30mA 0 5 0 2 5 5 7 5 10 12 5 Figure 8 Shutdown Voltage vs Temperature 501310 V 1 5 ON 1 0 OFF 3 5V 0 5 Vg 2 5V lo 1mA 0 50 25 0 25 50 75 1 Figure 9 Shutdown Current vs Shutdown CS01320 uA 60 V 3 5V V972 5V 50 NO LOAD 0 2 5 4 V LK112S SERIES Figure 10 Supply Voltage Rejection vs Temperature CS01330 SVR dB 60 45 30 fosc 400Hz 2 5 15 VsupN7 2V Io 50mA 0 50 235 0 25 50 75 11 2 Figure 11 Supply Voltage Rejection vs Output Current CS01340 SVR dB 80 60 SSS 40 fosc 400Hz 2 5 20 2V 0 0 50 100 150 200 250 lo mA Figure 12 Supply Voltage Rejection vs Frequency 501550 SVR dB 70 60 50 40 30 20 Vo 2 5V 10 10 02 f KHz 5 11 LK112S SERIES Figure 13 Supply Voltage Rejection vs Temperature 501360
9. D 0 00 LK112S SERIES LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION OUTPUT CURRENT UP TO 200mA LOW DROPOUT VOLTAGE 500mV MAX AT 200 VERY LOW QUIESCENT CURRENT 0 1uA IN OFF MODE AND MAX 250A IN ON MODE LOW OUTPUT NOISE 30uV lour 60mA AND 10Hz f 80KHz WIDE RANGE OF OUTPUT VOLTAGES INTERNAL CURRENT AND THERMAL LIMIT Vout TOLERANCE 2 AT 25 C DESCRIPTION The LK112S 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 30LV internal PNP pass transistor is used to achieve a low dropout voltage SCHEMATIC DIAGRAM SOT23 5L The LK112S has a very low quiescent current in ON MODE while in OFF MODE the 14 is reduced down to 100nA max The internal thermal shutdown circuitry limits the juntion 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 tot CURRENT LIMIT REFERENCE VOLTAGE ERROR AMPLIFIER DRIVER o BY
10. PASS TERM v PROTEC February 2003 5601250 1 11 LK112S SERIES ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VI DC Input Voltage 16 V Shutdown Input Voltage 16 V lo Output Current Internally limited Tstg Storage Temperature Range 55 to 150 Operating Junction Temperature Range 30 to 80 C CONNECTION DIAGRAM top view PIN DESCRIPTION Pin Symbol Name and Function 1 SHDN Shutdown Input Disables the regulator when is connected to GND or to positive voltage less than 0 6V 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 SC12360 3 Bypass Bypass Pin Bypass with 0 1uF to SOT23 5L improve the Vref thermal noise performances 4 OUT Port 5 IN Input Port ELECTRICAL CHARACTERISTICS FOR LK112 T 25 C Vin Vout 1V see Note 1 loyr 0mA 1 8 1 uF 2 2uF unless otherwise specified Symbol Parameter Test Conditions Min Typ Max Unit Quiescent Current ON MODE except leupw 175 250 pA OFF MODE V 8V Vsupw 0 0 1 Output Voltage 30mA see table AVo Line Regulation Vi Vo41
11. V to Vo 6V 5 6V 0 7 20 mV Vi Vo 1V to Vo46V gt 5 6V 0 8 40 1 Regulation 1 to 60mA 15 30 1 to 200mA 30 90 mV Dropout Voltage 60 mA see Note 2 0 17 0 24 V lo 200 mA see Note 2 0 35 0 5 V Short Circuit Current 200 mA SVR Voltage Rejection Vj Vo 1 5V Cpyp 55 dB Co 10uF f 2400Hz 0 230mA Output Noise Voltage B 10Hz to 80KHz O 1uF 30 uVrms 10 7 Vo1 5V lo 60mA Shutdown Input Current 1 8V Output ON 12 35 Shutdown Input Logic Output ON 1 8 V Output OFF 0 6 V Output Voltage 10mA 0 09 mV C Temperature Coefficient Note 1 for version with output voltage less than 2V Viyz2 4V Note 2 only for version with output voltage more than 2 1V 2 11 ky LK112S SERIES ORDERING NUMBERS AND OUTPUT VOLTAGE Part Number Output Voltage Vout Min Vout Test Voltage LK112SM13TR 1 3V 1 24V 1 36V 2 4V LK112SM14TR 1 4V 1 34V 1 46V 2 4V LK112SM15TR 1 5V 1 44V 1 56V 2 4V LK112SM16TR 1 6V 1 54V 1 66V 2 4V LK112SM17TR 1 7V 1 64V 1 76V 2 4V LK112SM18TR 1 8V 1 74V 1 86V 2 4V LK112SM19TR 1 9V 1 84V 1 96V 2 4V LK112SM20TR 2 0V 1 94V 2 06V 3 0V LK112SM21TR 2 1V 2 04V 2 16V 3 1V LK112SM22TR 2 2V 2 14V 2 26V 3 2V LK112SM23TR

ST LK112S SERIES handbook

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