LT1085 LT1085G LT1085IG LT1085SMD 3 AMP POSITIVE VOLTAGE REGULATOR INPUT SAFE AREA PROTECT ION CU RR EN T LIMITING AMPLIFIER L IM I T OU TPUT SEN SE T H E R M AL O V ER L O AD VOL T AGE REGUL ATION AMPLIFIER VR E F FEATURES * Low Dropout Performance * Fixed or Adjustable Voltages * Fixed Output Voltages of 3.3V, 5V & 12V * Adjustable Output Voltage Range From 1.2V * Line Regulation 0.015% / V Typical. * Load Regulation 0.01% Typical. * Available in Hermetically Sealed TO-3, SMD1 and TO-257 (isolated & non-isolated) Packages. * Military Temperature Range (-55 to +150C) DEVICE(1) LT1085K-XX LT1085G-XX LT1085IG-XX LT1085SMD-XX ADJUST DESCRIPTION The LT1085 voltage regulators are monolithic integrated circuits designed for use in applications requiring a well regulated positive output voltage with low input-output differential voltage. PACKAGE TO-3 TO-257 Isolated TO-257 SMD1 Note 1) -XX = Voltage Option: 3.3, 5 or 12 -XX = Left blank for Adjustable Option. Features include full power usage of up to 3A load current, internal current limiting and thermal shutdown. Safe area protection on the die is also included, providing protection of the series pass Darlington transistor under most conditions. The hermetically sealed packages are utilised for high reliability and low thermal resistance, whilst the SMD1 package is also designed for surface mount applications. ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated) VIN Input - Output Voltage Differential PD Power Dissipation RJC Thermal Resistance Junction To Case TO-3 TO-3 Control Power 0.93C / W 3.0C / W RJC Thermal Resistance Junction To Case SMD1 SMD1 Control Power 0.79C / W 4.0C / W RJC Thermal Resistance Junction To Case TO-257 TO-257 Control Power 0.79C / W 4.0C / W TJ Operating Junction Temperature Range Control Power -55 to 150C -55 to 200C TSTG Storage Temperature Range TLEAD Lead Temperature (for 10 sec.) 35V Internally limited * -65 to 150C 300C * These ratings are only applicable for power dissipations of 28 Watts over a limited range of VIN - VOUT. Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Document Number 3452 Issue 4 LT1085 LT1085G LT1085IG LT1085SMD ELECTRICAL CHARACTERISTICS (TA = 25C Unless otherwise stated) ALL VARIANTS EXCEPT IG The denotes specification is applicable over full operating temperature range. Parameter VO Output Voltage3,4,6 Output Voltage Test Conditions VIN = 5V, IOUT = 0, TJ = 25C (K Pack) 3.3V 4.8V VIN 15V, 0 IOUT IMAXLOAD 5.0V 12V VREF Reference Voltage4 ADJ. 3.3V 5.0V REG(LINE) Line Regulation2,3 12V Min. Typ. Max. Unit 3.270 3.300 3.333 V 3.235 3.300 3.365 VIN = 8V, IOUT = 0, TJ = 25C (K Pack) 4.950 5.000 5.050 6.5V VIN 20V, 0 IOUT IMAXLOAD 4.900 5.000 5.100 VIN = 15V, IOUT = 0, TJ = 25C (K Pack) 11.88 12.00 12.12 13.5V VIN 25V, 0 IOUT IMAXLOAD 11.76 12.00 12.24 (VIN - VOUT)= 3V, IOUT = 10mA, TJ = 25C 1.238 1.250 1.262 1.5V (VIN - VOUT) 25V, 10mA IOUT IMAXLOAD 1.225 1.250 1.270 4.8V VIN 15V, IOUT = 0, TJ = 25C 0.5 6 4.8V VIN 15V, IOUT = 0 1.0 6 6.5V VIN 20V, IOUT = 0, TJ = 25C 6.5V VIN 20V, IOUT = 0 0.5 10 1.0 10 1.0 25 2.0 25 0.015 0.2 0.035 0.2 0.050 0.5 3 15 7 20 5 20 10 35 12 36 24 72 0.1 0.3 13.5V VIN 25V, IOUT = 0, TJ = 25C 13.5V VIN 25V, IOUT = 0 1.5V (VIN - VOUT) 15V, ILOAD = 10mA, TJ = 25C ADJ. 1.5V (VIN - VOUT) 15V, ILOAD = 10mA 15V (VIN - VOUT) 35V 3.3V 5.0V REG(LOAD) Load Regulation2,3,4 12V VIN = 5V, 0 IOUT 3A, TJ = 25C VIN = 5V, 0 IOUT 3A VIN = 8V, 0 IOUT IMAXLOAD,TJ = 25C VIN = 8V, 0 IOUT IMAXLOAD VIN = 15V, 0 IOUT IMAXLOAD,TJ = 25C VIN = 15V, 0 IOUT IMAXLOAD (VIN - VOUT) = 3V,10mA IOUT IMAXLOAD, TJ = 25C ADJ. VD Dropout Voltage5 (VIN - VOUT) = 3V, 10mA IOUT IMAXLOAD 0.2 0.4 3.3V VOUT = 33mV,IOUT = IMAXLOAD 1.3 1.5 5.0V VOUT = 50mV,IOUT = IMAXLOAD 1.3 1.5 12V VOUT = 120mV,IOUT = IMAXLOAD 1.3 1.5 ADJ VOUT = 1%V ,IOUT = IMAXLOAD 1.3 1.5 V V V mV mV mV % mV mV mV % V Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Document Number 3452 Issue 4 LT1085 LT1085G LT1085IG LT1085SMD ELECTRICAL CHARACTERISTICS (TA = 25C Unless otherwise stated) LT1085IG VARIANT The denotes specification is applicable over full operating temperature range. Parameter VO Output Voltage3,4,6 Output Voltage Test Conditions VIN = 5V, IOUT = 0, TJ = 25C (K Pack) 3.3V 4.8V VIN 15V, 0 IOUT IMAXLOAD 5.0V 12V VREF Reference Voltage4 ADJ. 3.3V 5.0V REG(LINE) Line Regulation2,3 12V Min. Typ. Max. Unit 3.270 3.300 3.333 V 3.235 3.300 3.365 VIN = 8V, IOUT = 0, TJ = 25C (K Pack) 4.950 5.000 5.050 6.5V VIN 20V, 0 IOUT IMAXLOAD 4.900 5.000 5.100 VIN = 15V, IOUT = 0, TJ = 25C (K Pack) 11.88 12.00 12.12 13.5V VIN 25V, 0 IOUT IMAXLOAD 11.76 12.00 12.24 (VIN - VOUT)= 3V, IOUT = 10mA, TJ = 25C 1.231 1.250 1.268 1.5V (VIN - VOUT) 25V, 10mA IOUT IMAXLOAD 1.219 1.250 1.281 4.8V VIN 15V, IOUT = 0, TJ = 25C 0.5 6 4.8V VIN 15V, IOUT = 0 1.0 6 6.5V VIN 20V, IOUT = 0, TJ = 25C 0.5 10 6.5V VIN 20V, IOUT = 0 1.0 10 1.0 25 2.0 25 0.015 0.2 0.035 0.2 0.050 0.5 3 15 7 20 5 20 10 35 12 36 24 72 0.7 1.25 13.5V VIN 25V, IOUT = 0, TJ = 25C 13.5V VIN 25V, IOUT = 0 1.5V (VIN - VOUT) 15V, ILOAD = 10mA, TJ = 25C ADJ. 1.5V (VIN - VOUT) 15V, ILOAD = 10mA 15V (VIN - VOUT) 35V 3.3V 5.0V REG(LOAD) Load Regulation2,3,4 12V VIN = 5V, 0 IOUT 3A, TJ = 25C VIN = 5V, 0 IOUT 3A VIN = 8V, 0 IOUT IMAXLOAD,TJ = 25C VIN = 8V, 0 IOUT IMAXLOAD VIN = 15V, 0 IOUT IMAXLOAD,TJ = 25C VIN = 15V, 0 IOUT IMAXLOAD (VIN - VOUT) = 3V,10mA IOUT IMAXLOAD, TJ = 25C ADJ. VD Dropout Voltage5 (VIN - VOUT) = 3V, 10mA IOUT IMAXLOAD 0.8 1.65 3.3V VOUT = 33mV,IOUT = IMAXLOAD 1.3 1.5 5.0V VOUT = 50mV,IOUT = IMAXLOAD 1.3 1.5 12V VOUT = 120mV,IOUT = IMAXLOAD 1.3 1.5 ADJ VOUT = 1%V ,IOUT = IMAXLOAD 1.3 1.5 V V V mV mV mV % mV mV mV % V Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Document Number 3452 Issue 4 LT1085 LT1085G LT1085IG LT1085SMD ELECTRICAL CHARACTERISTICS (TA = 25C Unless otherwise stated) The denotes specification is applicable over full operating temperature range. Parameter IL Current Limit Output Voltage Test Conditions 3.3V VIN = 8V Quiescient/MinLoad Current Typ. 4.0 VIN = 10V 3.2 4.0 12V VIN = 17V 3.2 4.0 (VIN-VOUT) = 5V 3.2 4.0 (VIN-VOUT) = 25V 0.2 0.5 3.3V VIN = 18V 5.0 10.0 5.0V VIN 20V 5.0 10.0 12V VIN 25V 5.0 10.0 ADJ. (VIN-VOUT) = 25V 5.0 10.0 Over Full Operating Temperature Range ADJ. 1.5V (VIN - VOUT) 25V, 10mA IOUT IMAXLOAD ALL TA = 25C, 30ms Pulse 3.3V VIN = 6.3V, f = 120Hz, COUT=25F, IOUT = 3A 60 72 5.0V VIN = 8V, f = 120Hz, COUT=25F, IOUT = 3A 60 68 12V VIN = 15V, f = 120Hz, COUT=25F, IOUT = 3A 54 60 ADJ. (VIN-VOUT) = 3V, f = 120Hz, COUT=25F, CADJ=25F, IOUT = IMAXLOAD , 60 75 Temperature Stability ALL Over Full Operating Temperature Range Long Term Stability ALL TA = 125C, 1000 Hours RMS Output Noise (% of VOUT) ALL TA = 25C, 10Hz f 10kHz IPIN Adjust Pin Current IPIN Adjust Pin Current Change Thermal Regulation Ripple Rejection4 Max. 5.0V ADJ. IQ Min. 3.2 Note 1 : Absolute Maximum Rating area those values beyond which the life of a device may be impaired. Note 2 : See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. Note 3 : Line and load regulation are guaranteed up to the maximum power dissipation of 30W. Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Unit A mA 120 0.2 5.0 A 0.004 0.020 %/W dB 0.5 0.3 0.003 % 1.0 % % Note 4 : IMAXLOAD curve is defined as the minimum value of current limit as a function of input to output voltage. Note that the 30W power dissipation for the LT1085 series is only achievable over a limited range of input to output.voltage. Note 5 : Dropout voltage is specified over the full output current range of the device. Note 6 : Full load current is not available at all input-output voltages. See Notes 3, 4, Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Document Number 3452 Issue 4 LT1085 LT1085G LT1085IG LT1085SMD K Package (TO-3) G & IG Packages (TO-257) 40.01 (1.575) Max. 4.83 (0.190) 5.08 (0.200) 0.89 (0.035) 1.14 (0.045) 10.41 (0.410) 10.92 (0.430) 3.56 (0.140) Dia. 3.81 (0.150) 1 2 3 12.07 (0.500) 19.05 (0.750) 4.47 (0.176) Rad. 2 Pls. 13.38 (0.527) 13.64 (0.537) 26.67 (1.050) Max. 16.38 (0.645) 16.89 (0.665) 10.41 (0.410) 10.67 (0.420) 22.23 (0.875) Max. 11.43 (0.450) 6.35 (0.250) 1.09 (0.043) 0.97 (0.038) Dia. 1.63 (0.064) 1.52 (0.060) 0.64 (0.025) Dia. 0.89 (0.035) 2.54 (0.100) BSC 12.19 (0.48) 11.18 (0.44) 3.05 (0.120) BSC 30.40 (1.197) 29.90 (1.177) SMD1 PACKAGE 0.76 (0.030) min. 11.18 (0.440) 10.67 (0.420) 10.69 (0.421) 10.39 (0.409) 1 3.70 (0.146) 3.41 (0.134) 3.70 (0.146) 3.41 (0.134) 4.14 (0.163) 3.84 (0.151) 2 1 3.60 (0.142) Max. 3 16.02 (0.631) 15.73 (0.619) 4.09 (0.161) 3.84 (0.151) 2 Pls 2 16.97 (0.668) 16.87 (0.664) LT1085 Pin 1 2 Fixed Adjustable COMMON ADJUST INPUT INPUT Case is OUTPUT LT1085SMD Pin 1 2 3 LT1085G Pin 1 2 3 Fixed Adjustable COMMON ADJUST OUTPUT OUTPUT INPUT INPUT Case is OUTPUT Fixed COMMON OUTPUT INPUT Adjustable ADJUST OUTPUT INPUT LT1085IG Pin 1 2 3 Fixed Adjustable COMMON ADJUST OUTPUT OUTPUT INPUT INPUT Case is ISOLATED Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Document Number 3452 Issue 4