LHC7913-4 3 AMP NEGATIVE LOW DROP VOLTAGE REGULATOR DRAFT DATA WITH INHIBIT FEATURES: x Low output capacitance: 1 µF x Overtemperature protection x Overcurrent protection x Output short circuit monitoring, signalled by a TTL-compatible output x ON/OFF external control by means of TTL-compatible input. x Adjustable current limitation protects outputs from damaging shortcircuits. § REMOTE SENSING OPERATION 15-Jul-03 - Rev. 1.1 GENERAL DESCRIPTION: The LHC7913-4 is a negative Voltage Regulator family including both fixed and adjustable versions. Housed into Power SO-20 slug-up package. It is specifically intended for applications in rugged environments, such as Nuclear Physics, in which it has to withstand large amounts of radiation doses during its operating life. Input voltage ranges from -3 to -9 volts. Page 1 of 3 LHC7913- 4 ABSOLUTE MAXIMUM RATINGS (NOTE 1) Symbol Parameter Value Unit Vminus DC input voltage -10 V Vplus input voltage 5 V Vinh INHIBIT input voltage Vplus+ 0.3 V Io Output current Internally limited A OPERATING CONDITIONS (NOTE 2) Symbol Vminus Parameter Value DC input voltage Unit -9 V 2 ºC/W Note 1. Exceeding the absolute maximum rating may damage the device Note 2. The device is not guaranteed to function outside its operating rating. THERMAL INFORMATIONS Rthj-a Thermal Resistance Junction-Ambient Power So-20 slug-up To Operating junction temperature range -40 to 150 ºC TSTG Storage Temperature Range -40 to 150 ºC PIN CONFIGURATION Pin N° SO-20 Pin Name Pin Function 1 Vminus Vminus 2 NC NOT CONNECTED 3 NC NOT CONNECTED 4 NC NOT CONNECTED 5 SH-CNTRL SHORT CIRCUIT Control 6 OCM OVER CURRENT MONITOR 7 VPlus Voltage input for Ocm & Inhibit state 8 NC NOT CONNECTED 9 GND COMMON GROUND 10 Vminus Vminus 11 Vminus Vminus 12 INH INHIBIT 13 ADJ ADJ (Adjustable version) 14 NC NOT CONNECTED 15 VOUT OUTPUT 16 VOUT OUTPUT 17 NC NOT CONNECTED 18 NC NOT CONNECTED 19 NC NOT CONNECTED 20 Vminus Vminus 15-Jul-03 - Rev. 1.1 Page 2 of 3 LHC7913 - 4 ELECTRICAL CHARACTERISTICS: Unless otherwise specified , Vin = Vout - 2.5 V, Vout =-3V, Vplus=3V,Tj =25°C, Cin = 1 µ F, Cout = 1µ µF SYMBOL VIN PARAMETER Operating input voltage TEST CONDITIONS Iout = 3A Tj=-55° to 125° C VOUT Output voltage accuracy Iout = 5mA Tj=-55° to 125° C VOUT Operating output voltage Iout= 3A Tj=-55° to 125° C Ishort Output current limit ∆Vo/Vi Line regulation ∆Vo/VoI Lo Load regulation Vplus Quescent current Iq (Vminus) Quiescient current Iq, Plus Tj=-55° to 125° C Vplus =3V Quiescent Current, Tj=-55° to 125° C MIN -3 MAX -9 UNITS V -2 2 % -1.21 -7 V Adjustable Vi=Vout-2.5 to -12V Iout = 5mA Iout = 5mA to 3A 3 4 Vi=Vout-2.5 to -12V, On mode Iout = 30 mA 5 6 Vi=Vout-2.5 to -12V, On mode Iout = 300 mA 20 35 Vi=Vout-2.5 to -12V, On mode Iout = 1 A 40 75 Vi=Vout-2.5 to -12V, On mode Iout =2 A 80 140 Vi=Vout-2.5 to -12V, On mode Iout =3 A 150 240 0.8 Tj=-55° to 125° C 0.6 1.2 Tj=-55° to 125° C 0.95 2 Iout =3 A, Tj=-55° to 125° C 1.3 2.6 IINH Shutdown input current Cout Output capacitance 15-Jul-03 - Rev. 1.1 0.4 Iout= 1 A, Vin=Vout -2.5 ±0.5 V IOUT = 15mA f=120 Hz f= 33 Khz 2 0.8 Vplus =3V VINH = 3V Iout=0 to 3A Iout=0 to 3A mA 0.3 Iout= 2 A, Supply voltage rejection en/Vout µΑ 170 Vi=Vout-2.5 to -12V, On mode Iout= 5 mA SVR VOCMH % 200 Vplus = 3V Tj=-55° to 125° C VOCML 1 Off mode, Vinh=3V Inhibit voltage turn,Off voltage turn-On voltage ESR % 500 VINH VINH,Off VINH,On Electrical series Resistance Overcurrent monitor voltage Low Overcurrent monitor voltage High Output noise voltage A 1 200 Iout= 400 mA, Tj=-55° to 125° C Dropout voltage 4.5 On mode Output shorted to GND, Iocm = 0mA On mode, Output shorted to GND, Iocm =10mA On mode Iout=0 OFF mode Vinh =3V Vplus =3V Vd TYP V V 70 30 dB 15 µΑ 1 µF 2 6 Vplus =3V IOCM = 10 mA (sinked current) 0.6 IOCM = -10uA (sourced current), Vi=Vout-2.5 Vplus = 3V 10Hz < freq < 100 Khz Vplus ohm V V µVrms/V 400 Page 3 of 3