ST L4987 SERIES handbook
Contents
1. 2 Vout when Vinrising 0 0 2 4 6 8 10 Vin V Figure 5 Output and Flag Voltage vs Input Voltage GC80320 V V loyr 200mA Ty 125 C 0 2 4 6 8 10 Vin V Figure 6 Output Voltage vs Input Voltage GC80330 Vour V 8 6 V 4 VOU Vin 2 Vour when Vinrising 0 0 2 4 6 8 10 Vin V OI L4987 SERIES APPLICATION HINT OF L4987CPT30 HOW TO USE THE CONTROL FLAG The flag produces a logic low whenever the output drops out of regulation An out of regulation condition can result from 1 Low Input Voltage VIN lt Vout VDROP 2 Current Limiting 3 Thermal Limiting Figure 1 to 2 show the typical behavior of the output voltage and the control flag versus the input voltage and the temperature No hysteresis is implemented so the response of Vour and Vr ag are the same either when the Vin ramps up or down The control flag is an open collector which requires an external pull up resistor This may be connected to the regulator output Figure 9 or some other supply voltage Figure 10 Using the regulator output prevents an invalid high on the flag which occurs if it is pulled up to an external voltage while the regulator input voltage is reduced below about 2V Figure 12 Concerning the pull up resistor its2. Vo Output Voltage lo 200 mA V 6 3 V 2 88 3 3 3 066 V lo 200 mA V 6 3V Ty 40 to 125 C 2 76 3 432 Vi Operating Input Voltage lo 200 mA 4 18 V lout Output Current Limit 250 A AVS Line Regulation Vi 4 6 to 18 V lo 0 5 mA 2 4 14 mV AVo Load Regulation V 4 4 V lo 0 5 to 200 mA 3 20 mV la Quiescent Current Vi 4 6to 18 V lp 0 mA 0 7 1 mA ON MODE Vi 461018V lo 200 mA 1 5 6 OFF MODE Vi 12V 90 180 HA SVR Supply Voltage Rejection lo 2 5mA f 120 Hz 80 dB Vl 5 6 1V f 1KHz 75 f 10 KHz 60 Va Dropout Voltage lo 200 mA 0 25 0 5 V lo 200 mA T 2 40 to 125 C 0 7 Vi Control Input Logic Low Ty 40 to 125 C 0 8 V Vi Control Input Logic High Ty 40 to 125 C 2 V lj Control Input Current 10 HA Co Output Bypass Capacitance ESR 0 5 to 10 Q lo 0 to 200 mA 2 10 pF T j 40 to 125 C Ve Control Flag Output Low Vi Vo lt Vcesar power Ip 6MA 0 5 V lo 200mA lr Control Flag Output High V gt 4 V Von 15 V 10 HA Leakage Current 4 13 OI ELECTRICAL CHARACTERISTICS OF L4987CPT50 refer to the test circuits Vj 8V lo 5mA Ty 25 C C 0 1 pF Co 2 2 UF unless otherwise specified L4987 SERIES Symbol Parameter Test Conditions Min Typ Max Unit Vo Output Voltage lo 200 mA V 8V 4 9 5 5 1 V lo 200 mA V 8V T j 40 to 125 C 4 8 5 2 Vi Operating Input Voltage lo 200 mA 5 7 18 V lout Output Curre
3. 64 f 10 KHz 51 Va Dropout Voltage lo 200 mA 0 3 0 5 V lo 200 mA T 2 40 to 125 C 0 7 Vi Control Input Logic Low Ty 40 to 125 C 0 8 V Vi Control Input Logic High Ty 40 to 125 C 2 V lj Control Input Current 10 HA Co Output Bypass Capacitance ESR 0 5 to 10 Q lo 0 to 200 mA 2 10 pF T j 40 to 125 C Ve Control Flag Output Low Vi Vo lt Vcesar power Ig 6MA 0 5 V lo 200mA lr Control Flag Output High Vj 9 55 V Vou 15 V 10 HA Leakage Current ST 7 13 L4987 SERIES TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified Tj 25 C Cj Co 0 1 UF Figure 1 Output and Flag Voltage vs Input Voltage GC80280 vv 8 lour 200mA Ty 40 C 6 NG 4 Vour 2 0 0 2 4 6 8 10 Vin V Figure 2 Output Voltage vs Input Voltage GC80290 Vout V 8 lour 200mA Ty 40 C 6 V 4 VoU Vin 2 Vout when Vinrising 0 0 2 4 6 8 10 Vin V Figure 3 Output and Flag Voltage vs Input Voltage GC80300 Vv 8 lour 200mA Ti 25 C 6 Val 4 Vour 2 0 0 2 4 6 8 10 Vin V 8 13 Figure 4 Output Voltage vs Input Voltage GC80310 Vout V 8 lour 200mA Ty 25 C 4 Vout when Vinfalling
4. the dropout of the regulator f CURRENT LIMIT INHIBIT REFERENCE VOLTAGE OJ AMPLIFIER ERROR DRIVER TERM PROTEC UNDERVOLTAGE June 2003 SC13010 1 13 L4987 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vi DC Input Voltage 40 V lo Output Current Internally Limited Piot Power Dissipation Internally Limited Tstg Storage Temperature Range 40 to 150 C Top Operating Junction Temperature Range 40 to 125 C Absolute Maximum Ratings are those values beyond which damage to the device may occur Functional operation under these condition is not implied THERMAL DATA Symbol Parameter PPAK Unit Rthj case Thermal Resistance Junction case 8 C W Rthj amb Thermal Resistance Junction ambient 100 C W CONNECTION DIAGRAM top view ORDERING CODES SC13120 VOUT FLAG GND INHIBIT VIN TYPE OUTPUT VOLTAGE L4987CPT30 3 0 V L4987CPT33 3 3V L4987CPT50 5 0 V L4987CPT87 8 7 V L4987CPT120 12V 7 Available even in tape amp reel 2 13 lt ELECTRICAL CHARACTERISTICS OF L4987CPT30 refer to the test circuits Vj 6V l 5mA Ty 25 C C 0 1 pF Co 2 2 UF unless otherwise specified L4987
5. value must be properly chosen as suggested below When low as it is possible to see in figure 6 the control flag voltage is VELAG LOW Vee 9 5 VsuppLv RpuLL X IFL VsuppLy is chosen by design and thus is known while Ir must be at maximum 10mA Then 0 5V gt V sUPPLV RPULL x 10mA The minimum value of RpuL is so determined by the following equation RPULL min 2 VsuPPLY 0 5 10 mA Regarding the maximum value of Rpy note that its value depends of the type of logic used CMOS TTL etc the transistor leakage current and the presence or not of a load on Vr Aq The following example shows how to determine the Rpy max in the case of CMOS logic no load and 10pA for L4978 it is the maximum value of lp of control flag leakage current Because of CMOS logic VFLAG HIGH 2 2 3 VsuppL v But VFLAG HIGH VsuppLv RpuLL X IFH 2 2 3 Vsuppi y so the maximum value is determined by the following equation RpuLL max lt 1 3 VsuppLv 10 A Figure 7 Output and Flag Voltage vs Input Figure 8 Flag Voltage vs Input Vour V GC80440 Vrag V GC80450 Vest V Vour 3V Vour 3V Cw 1uF Cin 1 pF 4 Coyt 2 2 uF 4 Cour 2 2 uF RL 159 Hic 150 Ty 25 C Rruu 1KQ 3 RpuLL 1KA 3 between OUT between OUT and FLAG and FLAG 2 2 Vai 1 1 0 0 0 2 3 4 5 Vin V 3 3
6. 0 319 Y N C A i Po Bo s b 7 U dl m Ko Ao EE Note Drawing not in scale 12 13 OI L4987 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 Printed in Italy All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia Brazil Canada China Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States http www st com O 13 13
7. 00 L4987CXX120 N 0 AY L4987 SERIES VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT AND DROPOUT CONTROL FLAG VERY LOW DROPOUT VOLTAGE 0 25V TYP DROPOUT CONTROL FLAG VERY LOW QUIESCENT CURRENT TYP 90 mA IN OFF MODE 500mA IN ON MODE OUTPUT CURRENT UP TO 200 mA LOGIC CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGES OF 3V 3 3V 5V 8 7V 12V INTERNAL CURRENT AND THERMAL LIMIT ONLY 2 2uF FOR STABILITY AVAILABLE IN 296 SELECTION AT 25 C SUPPLY VOLTAGE REJECTION 70dB TYP DESCRIPTION The L4987 is a very low drop regulator available in PPAK The very low drop voltage 0 5V Max at 200 mA and the very low quiescent current make it particularly suitable for low noise low power applications and in battery powered systems The input dump protection up to 40V makes it ideal for automotive applications a shutdown Logic Control function is available pin2 TTL compatible This means that when the device is used as a local regulator it is possible to put a part SCHEMATIC DIAGRAM PPAK of the board in standby decreasing the total power consumption The regulator employs an output pin open collector providing a logic signal when the pass transistor is in saturation at low input voltage this signal can be used to prevent the pop up phenomenon in the car radio In battery powered systems the cellular phone notebook it is possible to use the flag to monitor the battery charge status through
8. 0to 18V lo 0 mA 0 5 1 mA ON MODE Vi 101018V lo 200 mA 3 6 OFF MODE Vi 12V 90 180 HA SVR Supply Voltage Rejection lo 2 5mA f 120 Hz 71 dB Vi211x1V f 1 KHz 68 f 10 KHz 55 Va Dropout Voltage lo 200 mA 0 3 0 5 V lo 200 mA T 2 40 to 125 C 0 7 Vi Control Input Logic Low Ty 40 to 125 C 0 8 V Vi Control Input Logic High Ty 40 to 125 C 2 V lj Control Input Current 10 HA Co Output Bypass Capacitance ESR 0 5 to 10 Q lo 0 to 200 mA 2 10 pF T j 40 to 125 C Ve Control Flag Output Low Vi Vo lt Vcesar power Ig 6MA 0 5 V lo 200mA lr Control Flag Output High Vj 9 55 V Vou 15 V 10 HA Leakage Current 6 13 OI L4987 SERIES ELECTRICAL CHARACTERISTICS OF L4987CPT120 refer to the test circuits Vj 15V lo 5mA Ty 25 C C 0 1 pF Co 2 2 UF unless otherwise specified Symbol Parameter Test Conditions Min Typ Max Unit Vo Output Voltage lo 200 mA V 15V 11 76 12 8 874 V lo 200mA V 15V Tj2 40to 125 C 11 52 9 05 Vi Operating Input Voltage lo 200 mA 12 75 18 V lout Output Current Limit 250 A AVS Line Regulation Vi 13 5t018V 15 20 5 mA 5 30 mV AVo Load Regulation Vi 13 5 V lo 0 5 to 200 mA 3 20 mV la Quiescent Current Vi 135t018V lp 2 0mA 0 5 1 mA ON MODE V 1351018V lg 200 mA 3 6 OFF MODE Vi 12V 90 180 HA SVR Supply Voltage Rejection lo z5 MA f 120 Hz 67 dB Vi2 14 5 1V f 1 KHz
9. 125 2 25 3 375 3 5 3 625 Vin V O 9 13 L4987 SERIES Figure 9 Test Circuit SC13090 Figure 10 Test Circuit VH exp FLAG SC13080 Figure 11 Equivalent Output Circuit Figure 12 Output and Flag Voltage vs Input Vour V GC80480 Vrlag V g RL 150 o Ty 225 FLAG to VsuppLv 6 trough Rr z8200 Vii 4 Vour 2 0 SC13100 0 2 3 4 5 Vin V 10 13 OI L4987 SERIES PPAK MECHANICAL DATA lt inch DIM MIN TYP MAX A 2 2 0 094 A1 0 9 0 043 A2 0 03 0 009 B 0 4 0 023 B2 5 2 0 212 C 0 45 0 023 C2 0 48 0 023 D 6 0 244 6 4 0 260 G 4 9 0 206 G1 2 38 0 106 H 9 35 0 397 L2 0 031 L4 0 6 0 039 DET AIL A DET AIL A t E 0078180 B 11 13 L4987 SERIES Tape amp Reel DPAK PPAK MECHANICAL DATA mm inch DIM MIN TYP MAX MIN TYP MAX A 180 7 086 C 0 504 0 512 0 519 D 20 2 0 795 N 60 2 362 T 14 4 0 567 Ao 680 690 70 0 268 0 272 0 2 76 Bo 0 409 0 413 0 417 Ko 0 100 0 104 0 105 Po 0 153 0 157 0 161 P 7 9 8 0 8 1 0 311 0 315
10. SERIES Symbol Parameter Test Conditions Min Typ Max Unit Vo JOutput Voltage lo 200 mA V7 6V 2 94 3 3 06 V lo 200 mA V 6V T j 40 to 125 C 2 88 3 12 Vi Operating Input Voltage lo 200 mA 3 62 18 V lout Output Current Limit 250 A AVS Line Regulation Vi 4 3 to 18 V lo 0 5 mA 2 4 14 mV AVo Load Regulation Vi 41V lo 0 5 to 200 mA 3 20 mV la Quiescent Current Vi 4 8to 18 V lp 0 mA 0 7 1 mA ON MODE Vi 43to018V 19 200mA 15 6 OFF MODE Vj 12V 90 180 HA SVR Supply Voltage Rejection lo 2 5mA f 120 Hz 80 dB Vl 53 1V f 1KHz 75 f 10 KHz 60 Va Dropout Voltage lo 200 mA 0 25 0 5 V lo 200 mA T 2 40 to 125 C 0 7 Vi Control Input Logic Low Ty 40 to 125 C 0 8 V Vi Control Input Logic High Ty 40 to 125 C 2 V lj Control Input Current 10 HA Co Output Bypass Capacitance ESR 0 5 to 10 Q lo 0 to 200 mA 2 10 pF T j 40 to 125 C Ve Control Flag Output Low Vi Vo lt Vcesar power Ig 6MA 0 5 V lo 200mA lr Control Flag Output High V gt 3 62 V Vou 15 V 10 HA Leakage Current OI 3 13 L4987 SERIES ELECTRICAL CHARACTERISTICS OF L4987CPT33 refer to the test circuits Vj 6 3V lo 5mA Ty 25 C C 0 1 UF Co 22 pF unless otherwise specified Symbol Parameter Test Conditions Min Typ Max Unit
11. nt Limit 250 A AVS Line Regulation Vi 6 3 to 18 V lo 0 5 mA 3 20 mV AVo Load Regulation V 3 6 V lo 0 5 to 200 mA 3 20 mV la Quiescent Current Vj 6 3 to 18V lo 0 mA 0 7 1 mA ON MODE Vi 63to018V lo 200 mA 15 6 OFF MODE Vj 12V 90 180 HA SVR Supply Voltage Rejection lo 2 5mA f 120 Hz 76 dB Vi 78 1V f 1 KHz 71 f 10 KHz 58 Va Dropout Voltage lo 200 mA 0 3 0 5 V lo 200 mA T 2 40 to 125 C 0 7 Vi Control Input Logic Low Ty 40 to 125 C 0 8 V Vi Control Input Logic High Ty 40 to 125 C 2 V lj Control Input Current 10 HA Co Output Bypass Capacitance ESR 0 5 to 10 Q lo 0 to 200 mA 2 10 pF T j 40 to 125 C Ve Control Flag Output Low Vi Vo lt Vcesar power Ig 6MA 0 5 V lo 200mA lr Control Flag Output High Vj 5 85 V Vou 15 V 10 HA Leakage Current OI 5 13 L4987 SERIES ELECTRICAL CHARACTERISTICS OF L4987CPT87 refer to the test circuits Vj 11 7V lo 5mA Ty 25 C C 0 1 UF Co 22 pF unless otherwise specified Symbol Parameter Test Conditions Min Tvp Max Unit Vo Output Voltage lo 200 mA V 11 7V 8 526 8 7 8 874 V lo 200 mA V 11 7V Tj2 40to 125 C 8 35 9 05 Vi Operating Input Voltage lo 200 mA 9 55 18 V lout Output Current Limit 250 A AVS Line Regulation Vi 10to 18V lo 0 5 mA 4 24 mV AVo Load Regulation Vi 2 10V lo 0 5 to 200 mA 3 20 mV la Quiescent Current Vi 2 1
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