SS6660 Switched-Capacitor Voltage Converter FEATURES DESCRIPTION Low output impedance (typ. 35Ω at The SS6660 is a monolithic CMOS switched- VIN=5V) capacitor voltage converter. Designed to be an Improved direct replacement for 7660 improved direct replacement for the popular 7660 Operation from 1.5V to 6V and LTC1044, the main function of the SS6660 No external diode required is to convert a positive input voltage in the range Simple conversion from +5V to -5V of 1.5V to 6V to the corresponding negative Low quiescent current (typ. 36µA at VIN=5V) High power efficiency (typ. 98%) output voltage in the range of 11.5V to -6V. The input voltage can also be doubled (V OUT Boost pin for higher switching frequency Improved SCR latchup protection = 2V IN ), divided (V OUT = V IN /2), or multiplied (V OUT = ±nV IN ) as shown in the application examples. APPLICATIONS The chip contains a series DC power supply RS-232 Power Supplies regulator, oscillator, control circuitry and four Handheld Instruments output power MOSFET switches. The frequency Data Acquisition Systems of the oscillator can be lowered by the addition of Supply Splitter VOUT = ±VIN/2 an external capacitor to the OSC pin, or the Operational Amplifier Supplies oscillator may be over-driven by an external clock. Panel Meter TYPICAL APPLICATION CIRCUIT This boost function is available to raise the oscillator frequency to optimize performance in VIN (1.5V to 6V) µ SS6660 specific applications. The "LV" terminal may be tied to GND to improve low input-voltage (V IN ≤ 3V) operation, or be left floating for input voltages Required for VIN ≤ 3V larger than 3V to improve power dissipation. The SS6660 provides performance superior to µ Negative voltage converter 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. Rev.2.02 1/29/2004 www.SiliconStandard.com 1 of 8 SS6660 ORDERING INFORMATION PIN CONFIGURATION SS6660CXXX Packing type TR: Tape and reel TB: Tube Package type: N: Plastic DIP S: Small outline 1 8 2 7 3 6 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 µ% !"# $ µ% Rev.2.02 1/29/2004 www.SiliconStandard.com 2 of 8 SS6660 ELECTRICAL CHARACTERISTICS (VIN = 5.0V, TA = 25°C, OSC = OPEN, unless otherwise specified.) %&%'& ()) ∞ *'+, ') * '%- .) IS " !# µ. ) * = ;) 0 ∞ $ ;') 0 ∞ & " 8#.9 '( !# Ω 7 7 10kHz 7( *# 2$70B% $# 2$ # 2& E9710kHz 0*& ∞ E/? η 3" 34 5 '(!%% 34 333 5 TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C) µ 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*#$#+Ω- µ µ µ $% #0*#$14%+5&6- %./ *3*#$#2/$% #0*#$1 Rev.2.02 1/29/2004 www.SiliconStandard.com 4 of 8 SS6660 BLOCK DIAGRAM 7( ÷ .# #2# $2# # '( *8 # . #9 : .# #.* PIN DESCRIPTIONS 2%$F 6),1 ( < < 2%"F , <91 < B%701 9< 0 2%8F *.2+ , < 1 1 0 2%!F )* , 1 ( <<1 ' 1 )* 1 < ,<'> 2%4F % , 2%F B% ,B 2%=F *.2, ,<10 0 2%F C ,%0 09 $#µ7 Rev.2.02 1/29/2004 www.SiliconStandard.com 5 of 8 SS6660 APPLICATION EXAMPLES µ% +/- 6 70 4 1 9 11 0 < 1 1 ' 1 1<0 ≤9<@ @ G #0* #)< ≤ ; µ% /0 70 3 1 1 ? 0 0 /1 )#2# Rev.2.02 1/29/2004 6 70 $# 1 1 0 <0 '(8,8 1 0 µ µ 9)1> /3 ( 4 www.SiliconStandard.com 6 of 8 SS6660 APPLICATION EXAMPLES (cont.) . 0170 #0* #)< ≤ $$ 1 1 ###85 +- µ% 91 1<> < $##. /9 1 01 9 1< 6 µ% ;=± / > (≤(≤( ? $ /33 .! (# +- µ% ;=+/ - . < + 0 #0* #)< ≤ ;=+- 6 µ% < H1 ( 9 1 170$8 *3* ,,$ Rev.2.02 1/29/2004 /3 +5 www.SiliconStandard.com 7 of 8 SS6660 PHYSICAL DIMENSIONS 8 Lead plastic SO (units: mm) )I;6 ;% ;.J . $ $! .$ #$# #8 6 # #$ * #$3 #8 =4# ## & 4# =## $8!I2 / 4# "8# #=# $8! 8 Lead plastic DIP (units: mm) ;% ;.J .$ #4$ K .8 838 =3" < # #" * #8# #" 3#$ $#$" & !"8 48" &$ "#3 !$8 )I;6 8=I2 6 K $#38 838 4$ 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