LTC1798 Series Micropower Low Dropout References FEATURES DESCRIPTION n 200mV Max Dropout at 10mA Output Current The LTC 1798/LTC1798-2.5/LTC1798-3/LTC1798-4.1/ n 4A Typical Quiescent Current LTC1798-5 are micropower bandgap references that n 0.15% Max Initial Accuracy combine high accuracy and low drift with very low supply n No Output Capacitor Required current and small package size. The combination of ultralow n Output Sources 10mA, Sinks 2mA quiescent current and low dropout voltage of only 200mV n 40ppm/C Max Drift (max) makes them ideal for battery-powered equipment. n Voltage Options: 2.5V, 3V, 4.1V, 5V and Adjustable The output voltage is set by an external resistor divider for the adjustable LTC1798. This series of references uses curvature compensation to APPLICATIONS obtain low temperature coefficient and trimmed thin-film n Battery-Powered Systems resistors to achieve high output accuracy. These references n Handheld Instruments can source up to 10mA and sink up to 2mA, making them n Precision Power Supplies ideal for precision regulator applications. They are stable n A/D and D/A Converters without an output bypass capacitor, but are also stable n Available in the SO-8 Package with capacitance up to 1F. This feature is important in critical applications where PC board space is a premium L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. and fast settling is demanded. The LTC1798 series references provided power dissipation advantages over shunt references. In addition to supply current, shunt references must also idle the entire load current to operate. The LTC1798 series is available in the SO-8 package. TYPICAL APPLICATION LTC1798-2.5 Temperature Drift 2.5V Battery-Powered Reference 4 3 LTC1798-2.5 2 2 6 2.7V IN OUT 2.5V TO 12.6V 1 0.1F GND 1798 TA01 0 4 1 2 3 4 40 20 0 20 40 60 80 100 TEMPERATURE (C) 1798 TA02 1798fc 1 REFERENCE VOLTAGE CHANGE (mV)LTC1798 Series ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Operating Temperature Range...................... 0C to 70C *DNC 1 8 DNC* Extended Commercial Operating IN 2 7 DNC* Temperature Range .................................. 40C to 85C **DNC/FB OUT 3 6 Junction Temperature ........................................... 110C GND DNC* 4 5 Storage Temperature Range ................... 65C to 150C S8 PACKAGE Lead Temperature (Soldering, 10 sec) .................. 300C 8-LEAD PLASTIC SO T = 125C, q = 190C/W JMAX JA * CONNECTED INTERNALLY. DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS ** DNC FOR LTC1798-2.5/LTC1798-3/LTC1798-4.1/LTC1798-5, FB FOR LTC1798 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC1798CS8 PBF (OBSOLETE) LTC1798CS8 TRPBF 1798 8-Lead Plastic SO 0C to 70C LTC1798CS8-2.5 PBF LTC1798CS8-2.5 TRPBF 179825 8-Lead Plastic SO 0C to 70C LTC1798CS8-3 PBF LTC1798CS8-3 TRPBF 17983 8-Lead Plastic SO 0C to 70C LTC1798CS8-4.1 PBF LTC1798CS8-4.1 TRPBF 179841 8-Lead Plastic SO 0C to 70C LTC1798CS8-5 PBF LTC1798CS8-5 TRPBF 17985 8-Lead Plastic SO 0C to 70C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: