LTC1261LIMS8#PBF Analog Devices

LTC1261L Switched Capacitor Regulated Voltage Inverter FEATURES DESCRIPTION n Regulated Negative Voltage from a The LTC 1261L is a switched-capacitor voltage inverter Single Positive Supply designed to provide a regulated negative voltage from a n REG Pin Indicates Output is in Regulation single positive supply. The LTC1261L operates from a n Adjustable or Fixed Output Voltages single 2.7V to 5.25V supply and provides an adjustable n Output Regulation: 4.5% output voltage from 1.23V to 5V. The LTC1261L-4/ n Supply Current: 650A Typ LTC1261L-4.5 needs a single 4.5V to 5.25V supply and n Shutdown Mode Drops Supply Current to 5A provides a fixed output voltage of 4V to 4.5V respec- n Up to 20mA Output Current tively. Three external capacitors are required: a 0.1F flying n Requires Only Three or Four External Capacitors capacitor and an input and output bypass capacitors. An n Available in MS8 and SO-8 Packages optional compensation capacitor at ADJ (COMP) can be used to reduce the output voltage ripple. Each version of the LTC1261L will supply up to 20mA APPLICATIONS output current with guaranteed output regulation of 4.5%. n GaAs FET Bias Generators The LTC1261L includes an open-drain REG output that n Negative Supply Generators pulls low when the output is within 5% of the set value. n Battery-Powered Systems Quiescent current is typically 650A when operating and n Single Supply Applications 5A in shutdown. The LTC1261L is available in 8-pin MSOP and SO packages. 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. TYPICAL APPLICATION Waveforms for 4V Generator with Power Valid 4V Generator with Power Valid 0V 5V OUT 1 8 5V V SHDN CC 10k 4V 2 7 + C1 REG POWER VALID C1 C2 5V LTC1261L-4 1F 0.1F 3 6 V = 4V SHDN OUT C1 OUT AT 10mA 0V C4 4 5 3.3F + GND COMP 5V C3* POWER VALID 100pF 0V 1261L TA01 *OPTIONAL 1261L TA02 0.1ms/DIV 1261lfa 1LTC1261L ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (Note 2) ...........................................5.5V Output Short-Circuit Duration ......................... Indefinite Output Voltage (Note 3) ............................0.3V to 5.3V Commercial Temperature Range (Note 4) .... 0C to 70C Total Voltage, V to V (Note 2) ........................10.8V Industrial Temperature Range (Note 4) ... 40C to 85C CC OUT SHDN Pin ......................................0.3V to (V + 0.3V) Storage Temperature Range ................... 65C to 150C CC REG Pin........................................................ 0.3V to 6V Lead Temperature (Soldering, 10 sec) .................. 300C ADJ Pin .............................(V 0.3V) to (V + 0.3V) OUT CC PIN CONFIGURATION TOP VIEW TOP VIEW V 1 8 SHDN CC V 1 8 SHDN CC + + C1 2 7 REG C1 2 7 REG C1 3 6 OUT C1 3 6 OUT GND 4 5 ADJ (COMP) GND ADJ (COMP) 4 5 MS8 PACKAGE 8-LEAD PLASTIC MSOP S8 PACKAGE T = 150C, = 200C/W JMAX JA 8-LEAD PLASTIC SO T = 150C, = 135C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1261LCMS8 PBF LTC1261LCMS8 TRPBF LTFM 8-Lead Plastic MSOP 0C to 70C LTC1261LIMS8 PBF LTC1261LIMS8 TRPBF LTFM 8-Lead Plastic MSOP 40C to 85C LTC1261LCMS8-4 PBF LTC1261LCMS8-4 TRPBF LTFN 8-Lead Plastic MSOP 0C to 70C LTC1261LIMS8-4 PBF LTC1261LIMS8-4 TRPBF LTFN 8-Lead Plastic MSOP 40C to 85C LTC1261LCMS8-4.5 PBF LTC1261LCMS8-4.5 TRPBF LTFP 8-Lead Plastic MSOP 0C to 70C LTC1261LIMS8-4.5 PBF LTC1261LIMS8-4.5 TRPBF LTFP 8-Lead Plastic MSOP 40C to 85C LTC1261LCS8 PBF LTC1261LCS8 TRPBF 1261L 8-Lead Plastic SO 0C to 70C LTC1261LIS8 PBF LTC1261LIS8 TRPBF 1261L 8-Lead Plastic SO 40C to 85C LTC1261LCS8-4 PBF LTC1261LCS8-4 TRPBF 1261L4 8-Lead Plastic SO 0C to 70C LTC1261LIS8-4 PBF LTC1261LIS8-4 TRPBF 1261L4 8-Lead Plastic SO 40C to 85C LTC1261LCS8-4.5 PBF LTC1261LCS8-4.5 TRPBF 261L45 8-Lead Plastic SO 0C to 70C LTC1261LIS8-4.5 PBF LTC1261LIS8-4.5 TRPBF 261L45 8-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: