LTC1044/7660 Switched Capacitor Voltage Converter FEATURES DESCRIPTION n Plug-In Compatible with 7660 with These Additional The LTC 1044 is a monolithic CMOS switched capacitor Features: voltage converter which is manufactured using Analog n Guaranteed Operation to 9V, with No External Devices enhanced LTCMOS silicon gate process. The Diode, Over Full Temperature Range LTC1044 provides several voltage conversion functions: n Boost Pin (Pin 1) for Higher Switching Frequency the input voltage can be inverted (V = V ), doubled OUT IN n Lower Quiescent Power (V = 2V ), divided (V = V /2) or multiplied (V OUT IN OUT IN OUT n Efficient Voltage Doubler = nV ). IN n 200A Max. No Load Supply Current at 5V Designed to be pin-for-pin and functionally compatible n 97% Min. Open Circuit Voltage Conversion Efficiency with the popular 7660, the LTC1044 provides significant n 95% Min. Power Conversion Efficiency features and improvements over earlier 7660 designs. n Wide Operating Supply Voltage Range, 1.5V to 9V These improvements include: full 1.5V to 9V supply oper- n East to Use ation over the entire operating temperature range, without n Commercial Device Guaranteed Over 40C to 85C the need for external protection diodes two and one-half Temperature Range times lower quiescent current for greater power conver- sion efficiency and a boost function which is available to raise the internal oscillator frequency to optimize per- APPLICATIONS formance in specific applications. n Conversion of 5V to 5V Supplies n Although the LTC1044 provides significant design and Precise Voltage Division, V = V /2 20ppm OUT IN n performance advantages over the earlier 7660 device, it Voltage Multiplication, V = nV OUT IN n still maintains its compatibility with existing 7660 designs. Supply Splitter, V = V /2 OUT S All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION Generating CMOS Logic Supply from Two Mercury Batteries Supply Current vs Supply Voltage 400 360 R = 4.8V L 320 1 8 V OUT I 280 S 2 7 2 1.2V + LTC1044 CMOS C1 CELLS 240 6 3 LOGIC 10F NETWORK 200 4 5 C2 160 10F GUARANTEED 120 TYPICAL POINT + 80 SUPPLY CURRENT I 3A 1044 7660 TA01a S 40 0 0 1 2 3 4 5 6 7 8 9 10 + SUPPLY VOLTAGE, V (V) 1044/7660 TA01b Rev. A 1 Document Feedback For more information www.analog.com NO LOAD INPUT CURRENT, I (A) SLTC1044/7660 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Operating Temperature Range Supply Voltage .........................................................9.5V LTC1044C ..................................... 40C T 85C A Input Voltage on Pins 1, 6 and 7 LTC1044M ...................................55C T 125C A + (Note 2) .................................0.3V V V + 0.3V IN Storage Temperature Range .................. 65C to 150C Current into Pin 6 ....................................................20A Lead Temperature (Soldering, 10sec)....................300C Output Short Circuit Duration + (V 5.5V) ................................................Continuous PIN CONFIGURATION TOP VIEW TOP VIEW + + TOP VIEW BOOST 1 8 V V (CASE) + + 8 CAP 2 7 OSC BOOST 1 8 V 1 BOOST 7 OSC + GROUND 3 6 LV CAP 2 7 OSC + 6 CAP 2 LV CAP 4 5 V GROUND 3 6 LV OUT CAP 4 5 V 5 OUT 3 V GROUND OUT J8 PACKAGE 4 8-LEAD HERMETC DIP CAP N8 PACKAGE H PACKAGE 8-LEAD PDIP OBSOLETE PACKAGE 8-LEAD TO-5 METAL CAN ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1044CH PBF LTC1044CH TRPBF Metal Can H Package 40C to 85C LTC1044MH PBF LTC1044MH TRPBF Metal Can H Package 55C to 125C OBSOLETE PACKAGE LTC1044CJ8 PBF LTC1044CJ8 TRPBF 8-Lead CERDIP 40C to 85C LTC1044MJ8 PBF LTC1044MJ8 TRPBF 8-Lead CERDIP 55C to 125C LTC1044CN8 PBF LTC1044CN8 TRPBF 8-Lead PDIP 0C to 70C Contact the factory for parts specified with wider operating temperature ranges. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. A 2 For more information www.analog.com