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| SS6660 Switched-Capacitor Voltage Converter FEATURES Low output impedance (typ. 35 at VIN=5V) Improved direct replacement for 7660 Operation from 1.5V to 6V DESCRIPTION The SS6660 is a monolithic CMOS switchedcapacitor voltage converter. Designed to be an improved direct replacement for the popular 7660 and LTC1044, the main function of the SS6660 is to convert a positive input voltage in the range of 1.5V to 6V to the corresponding negative output voltage in the range of 11.5V to -6V. The input voltage can also be doubled (VOUT = 2VIN), divided (VOUT = VIN/2), or multiplied (VOUT = nVIN) as shown in the application examples. The chip contains a series DC power supply regulator, oscillator, control circuitry and four output power MOSFET switches. The frequency of the oscillator can be lowered by the addition of an external capacitor to the OSC pin, or the oscillator may be over-driven by an external clock. No external diode required Simple conversion from +5V to -5V Low quiescent current (typ. 36A at VIN=5V) High power efficiency (typ. 98%) Boost pin for higher switching frequency Improved SCR latchup protection APPLICATIONS RS-232 Power Supplies Handheld Instruments Data Acquisition Systems Supply Splitter VOUT = VIN/2 Operational Amplifier Supplies Panel Meter TYPICAL APPLICATION CIRCUIT This boost function is available to raise the oscillator frequency to optimize performance in specific applications. The "LV" terminal may be tied to GND to improve low input-voltage (VIN 3V) operation, or be left floating for input voltages VIN (1.5V to 6V) Required for VIN 3V larger than 3V to improve power dissipation. The SS6660 provides performance superior to previous designs by combining low output impedance, low quiescent current with high efficiency and by eliminating losses from diode voltage drops. The only external components required are two low-cost electrolytic capacitors. SS6660 Negative voltage converter Rev.2.02 1/29/2004 www.SiliconStandard.com 1 of 8 SS6660 PIN CONFIGURATION 1 2 3 8 7 6 ORDERING INFORMATION SS6660CXXX Packing type TR: Tape and reel TB: Tube Package type: N: Plastic DIP S: Small outline Example: SS6660CSTR in SO-8 package shipped on tape and reel. Please note that CN is only available in tubes. ABSOLUTE MAXIMUM RATINGS ) 0%B%9B%C "# 02$9" ! ,#D+# 0 0,=#*D+4* )0 0 ,"*D$#* TEST CIRCUIT % !"# $ % Rev.2.02 1/29/2004 www.SiliconStandard.com 2 of 8 SS6660 ELECTRICAL CHARACTERISTICS (VIN = 5.0V, TA = 25C, OSC = OPEN, unless otherwise specified.) %&%'& ) * ; ) 0 ;' ) 0 ()) = *'+, ') $ * " '%- !# " !# .) . IS & '( 8# .9 7 10kHz 7( *# 2$70B% 2$ 7 $# # E/? 2& 0*& E9710kHz '(!%% 3" 34 34 333 5 5 TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25C) ! "# )* #$+,- $ %&'!'"#( ! Rev.2.02 1/29/2004 www.SiliconStandard.com 3 of 8 SS6660 TYPICAL PERFORMANCE CHARACTERISTICS (cont.) ( ! *+ ) "#( ! % #0*#$14%+5&6 ! ( ! *+ ,) "#( ! - %./ % #0*#$12/*331.# &. !' $!/ 012- )#' !'"# *3*#$#+- $% #0*#$14%+5&6- %./ *3*#$#2/$% #0*#$1 Rev.2.02 1/29/2004 www.SiliconStandard.com 4 of 8 SS6660 BLOCK DIAGRAM / .# #2# $2# # 7( .# #.* *8 # . #9 : '( PIN DESCRIPTIONS 2%$F 6) 1 ( , < < 2%8F *.2+ , < 1 1 0 2%F B% ,B 2%4F % 2%=F *.2, ,< 10 0 2%F C ,%0 09 $#7 2%"F , <91 < B%701 9< 0 , 1 ( < <1 ' 1 )* 1 < , <'> , 2%!F )* Rev.2.02 1/29/2004 www.SiliconStandard.com 5 of 8 SS6660 70 4 1 9 11 0 < 1 1 ' 1 1 <0 9 <@ @ G APPLICATION EXAMPLES +/ - % 6 #0* #)< ; % /0 70 3 1 1 ? 0 0 /1 )#2# 70 $# 1 1 0 <0 '(8,8 1 0 9)1> 6 /3 ( 4 Rev.2.02 1/29/2004 www.SiliconStandard.com 6 of 8 SS6660 APPLICATION EXAMPLES (cont.) % 6 % ;= / > ((( ? $ +- #0* #)< . 0 170 $$ 1 1 ###85 91 1 <> < $##. /9 1 01 9 1 < /33 .! (# +- % 6 ;=+/ - . < H1 < + 0 #0* #)< ;=+- ( 9 1 170$8 % *3* ,,$ /3 +5 Rev.2.02 1/29/2004 www.SiliconStandard.com 7 of 8 SS6660 PHYSICAL DIMENSIONS 8 Lead plastic SO (units: mm) )I;6 . ;% $ #$# # #$3 =4# 4# 4# #=# ;.J $! #8 #$ #8 ## =## "8# $8! .$ 6 * & / $8!I2 8 Lead plastic DIP (units: mm) )I;6 .$ ;% #4$ 838 # #8# 3#$ !"8 "#3 K 838 ;.J K =3" #" #" $#$" 48" !$8 $#38 4$ .8 < * & &$ 6 8=I2 Information furnished by Silicon Standard Corporation is believed to be accurate and reliable. However, Silicon Standard Corporation makes no guarantee or warranty, express or implied, as to the reliability, accuracy, timeliness or completeness of such information and assumes no responsibility for its use, or for infringement of any patent or other intellectual property rights of third parties that may result from its use. Silicon Standard reserves the right to make changes as it deems necessary to any products described herein for any reason, including without limitation enhancement in reliability, functionality or design. No license is granted, whether expressly or by implication, in relation to the use of any products described herein or to the use of any information provided herein, under any patent or other intellectual property rights of Silicon Standard Corporation or any third parties. Rev.2.02 1/29/2004 www.SiliconStandard.com 8 of 8 |
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