LTC1046 "Inductorless" 5V to -5V Converter FEATURES DESCRIPTION 50mA Output Current nn Plug-In Compatible with ICL7660/LTC1044 nn R OUT = 35 Maximum nn 300A Maximum No Load Supply Current at 5V nn Boost Pin (Pin 1) for Higher Switching Frequency nn 97% Minimum Open-Circuit Voltage Conversion Efficiency nn 95% Minimum Power Conversion Efficiency nn Wide Operating Supply Voltage Range: 1.5V to 6V nn Easy to Use nn Low Cost The LTC(R)1046 is a 50mA monolithic CMOS switched capacitor voltage converter. It plugs in for the ICL7660/ LTC1044 in 5V applications where more output current is needed. The device is optimized to provide high current capability for input voltages of 6V or less. It trades off operating voltage to get higher output current. The LTC1046 provides several voltage conversion functions: the input voltage can be inverted (VOUT = - VIN), divided (VOUT = VIN/2) or multiplied (VOUT = nVIN). nn APPLICATIONS Designed to be pin-for-pin and functionally compatible with the ICL7660 and LTC1044, the LTC1046 provides 2.5 times the output drive capability. All registered trademarks and trademarks are the property of their respective owners. Conversion of 5V to 5V Supplies Precise Voltage Division, VOUT = VIN /2 nn Supply Splitter, V OUT = VS /2 nn nn TYPICAL APPLICATION Output Voltage vs Load Current for V + = 5V Generating - 5V from 5V -5 TA = 25C LTC1046 10F + 2 3 4 BOOST CAP + GND CAP - V+ OSC LV VOUT 8 5V INPUT 7 6 5 -5V OUTPUT 10F + 1046 TA01 -4 OUTPUT VOLTAGE (V) 1 ICL7660/LTC1044, ROUT = 55 -3 LTC1046, ROUT = 27 -2 -1 0 0 10 20 30 40 LOAD CURRENT, IL (mA) 50 1046 TA02 Rev. C Document Feedback For more information www.analog.com 1 LTC1046 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage..........................................................6.5V Input Voltage on Pins 1, 6 and 7 (Note 2)..................................- 0.3 < VIN < (V+) +0.3V Current into Pin 6.....................................................20A Output Short Circuit Duration (V+ 6V).................................................... Continuous Operating Temperature Range LTC1046C.........................................0C TA 70C LTC1046I......................................-40C TA 85C LTC1046M (OBSOLETE).................. -55C to 125C Storage Temperature Range.................... -65C to 150C Lead Temperature (Soldering, 10 sec.).................. 300C PIN CONFIGURATION TOP VIEW BOOST 1 CAP + 8 2 7 OSC GND 3 6 LV 5 VOUT CAP - 4 TOP VIEW TOP VIEW V+ J8 PACKAGE 8-LEAD CERDIP BOOST 1 8 V+ CAP + 2 7 OSC GND 3 6 LV CAP - 4 5 VOUT 8 V+ CAP + 2 7 OSC GND 3 6 LV CAP - 4 5 VOUT N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 110C, JA = 130C (N8) TJMAX = 150C, JA = 150C TJMAX = 160C, JA = 100C OBSOLETE PACKAGE BOOST 1 Consider the N8 or S8 for Alternate Source ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC1046CN8#PBF PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1046CN8#TRPBF 8-Lead PDIP 0C to 70C LTC1046IN8#PBF LTC1046IN8#TRPBF 8-Lead PDIP -40C to 85C LTC1046MJ8#PBF LTC1046MJ8#TRPBF LTC1046CS8#PBF LTC1046CS8#TRPBF LTC1046IS8#PBF LTC1046IS8#TRPBF OBSOLETE PACKAGE 8-Lead CERDIP -55C to 125C 1046 8-Lead Plastic SO 0C to 70C 1046I 8-Lead Plastic SO -40C to 85C 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. C 2 For more information www.analog.com LTC1046 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. V+ = 5V, COSC = 0pF, unless otherwise noted. LTC1046C SYMBOL PARAMETER IS Supply Current RL = , Pins 1 and 7 No Connection RL = , Pins 1 and 7 No Connection, V+ = 3V V+L Minimum Supply Voltage RL = 5k l V+ Maximum Supply Voltage RL = 5k l Output Resistance V+ = 5V, I H ROUT CONDITIONS MIN L = 50mA (Note 3) V+ = 2V, IL = 10mA LTC1046I/M TYP MAX 165 35 300 1.5 MIN TYP MAX UNITS 165 35 300 A A 1.5 V 6 27 27 60 l l 35 45 85 27 27 60 6 V 35 50 90 fOSC Oscillator Frequency V+ = 5V (Note 4) V+ = 2V 20 4 30 5.5 20 4 30 5.5 kHz kHz PEFF Power Efficiency RL = 2.4k 95 97 95 97 % VOUTEFF Voltage Conversion Efficiency RL = 97 99.9 97 99.9 % IOSC Oscillator Sink or Source Current = 0V or V+ VOSC Pin 1 = 0V Pin 1 = V+ l l Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Connecting any input terminal to voltages greater than V+ or less than ground may cause destructive latch-up. It is recommended that no inputs from sources operating from external supplies be applied prior to power-up of the LTC1046. 4.2 15 35 45 4.2 15 40 50 A A Note 3: ROUT is measured at TJ = 25C immediately after power-on. Note 4: fOSC is tested with COSC = 100pF to minimize the effects of test fixture capacitance loading. The 0pF frequency is correlated to this 100pF test point, and is intended to simulate the capacitance at pin 7 when the device is plugged into a test socket and no external capacitor is used. Rev. C For more information www.analog.com 3 LTC1046 TYPICAL PERFORMANCE CHARACTERISTICS Output Resistance vs Supply Voltage 1000 TA = 25C V + = 5V IL = 10mA 300 C1 = C2 = 1F C1 = C2 = 10F C1 = C2 = 100F 100 0 100 1k 10k 80 TA = 25C IL = 3mA COSC = 100pF 100 COSC = 0pF 10 1 0 OSCILLATOR FREQUENCY, fOSC (Hz) 2 3 4 5 SUPPLY VOLTAGE, V + (V) 1046 G01 8 70 7 IS 6 50 5 40 4 20 10 0 3 TA = 25C V + = 2V C1 = C2 = 10F fOSC = 8kHz 0 1 2 3 4 5 6 7 8 LOAD CURRENT, IL (mA) 9 2 1 10 0 90 80 70 60 60 50 50 IS 30 10 0 40 0 10 20 50 30 40 LOAD CURRENT, IL (mA) -2.5 0 2 4 0 2 1 0 -1 -2 -4 6 8 10 12 14 16 18 20 LOAD CURRENT, IL (mA) 1046 G07 A = 100F, 1mA B = 100F, 15mA C = 10F, 1mA D = 10F, 15mA E = 1F, 1mA F = 1F, 15mA A 96 94 C 92 V + = 5V TA = 25C C1 = C2 B 90 E 88 86 D 84 F 82 80 100 1k 10k 100k OSCILLATOR FREQUENCY, fOSC (Hz) -5 SLOPE = 27 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT, IL (mA) 1046 G08 1M 1046 G06 Oscillator Frequency as a Function of COSC 100 -3 SLOPE = 52 -2.0 70 OSCILLATOR FREQUENCY, fOSC (kHz) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3 -1.0 10 TA = 25C V + = 5V fOSC = 30kHz C1 = C2 = 10F 4 0.0 60 20 98 Output Voltage vs Load Current for V+ = 5V 5 -0.5 30 TA = 25C V + = 5V C1 = C2 = 10F fOSC = 30kHz 20 100 90 70 40 125 1046 G03 1046 G05 2.5 0.5 -25 0 75 100 25 50 AMBIENT TEMPERATURE (C) Power Conversion Efficiency vs Oscillator Frequency PEFF 80 Output Voltage vs Load Current for V+ = 2V -1.5 10 -55 100 1046 G04 TA = 25C 2.0 V + = 2V fOSC = 8kHz 1.5 C1 = C2 = 10F 1.0 V + = 5V, COSC = 0pF 30 7 SUPPLY CURRENT (mA) 80 30 6 100 POWER CONVERSION EFFICIENCY, PEFF (%) 9 SUPPLY CURRENT (mA) POWER CONVERSION EFFICIENCY, PEFF (%) 10 60 40 Power Conversion Efficiency vs Load Current for V+ = 5V PEFF V + = 2V, COSC = 0pF 50 1046 G02 Power Conversion Efficiency vs Load Current for V+ = 2V 90 60 20 100k 100 C1 = C2 = 10F 70 POWER CONVERSION EFFICIENCY, PEFF (%) 400 OUTPUT RESISTANCE, RO () OUTPUT RESISTANCE, RO () 500 Output Resistance vs Temperature OUTPUT RESISTANCE () Output Resistance vs Oscillator Frequency 200 (Using Test Circuit in Figure 1) V + = 5V TA = 25C PIN 1 = V + 10 1 PIN 1 = OPEN 0.1 1000 1 10 100 10000 EXTERNAL CAPACITOR (PIN 7 TO GND), COSC (pF) 1046 G09 Rev. C 4 For more information www.analog.com LTC1046 TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency as a Function of Supply Voltage Oscillator Frequency vs Temperature 40 TA = 25C COSC = 0pF OSCILLATOR FREQUENCY, fOSC (kHz) OSCILLATOR FREQUENCY, fOSC (kHz) 100 10 1 0 1 (Using Test Circuit in Figure 1) 2 3 6 4 5 AMBIENT TEMPERATURE (C) 38 36 34 32 30 28 26 -55 7 V + = 5V COSC = 0pF -25 0 75 100 25 50 AMBIENT TEMPERATURE (C) 125 1046 G11 1046 G10 TEST CIRCUIT V + (5V) LTC1046 + C1 10F 2 3 4 BOOST CAP + GND CAP - V+ OSC LV VOUT IS 8 7 EXTERNAL OSCILLATOR 6 IL RL 5 COSC + 1 VOUT C2 10F 1046 F01 Figure 1 Rev. C For more information www.analog.com 5 LTC1046 APPLICATIONS INFORMATION Theory of Operation To understand the theory of operation of the LTC1046, a review of a basic switched capacitor building block is helpful. In Figure 2, when the switch is in the left position, capacitor C1 will charge to voltage V1. The total charge on C1 will be q1 = C1V1. The switch then moves to the right, discharging C1 to voltage V2. After this discharge time, the charge on C1 is q2 = C1V2. Note that charge has been transferred from the source, V1, to the output, V2. The amount of charge transferred is: q = q1 - q2 = C1(V1 - V2). If the switch is cycled "f" times per second, the charge transfer per unit time (i.e., current) is: V2 f C1 RL C2 For example, if you examine power conversion efficiency as a function of frequency (see typical curve), this simple theory will explain how the LTC1046 behaves. The loss, and hence the efficiency, is set by the output impedance. As frequency is decreased, the output impedance will eventually be dominated by the 1/fC1 term and power efficiency will drop. The typical curves for power efficiency versus frequency show this effect for various capacitor values. Note also that power efficiency decreases as frequency goes up. This is caused by internal switching losses which occur due to some finite charge being lost on each switching cycle. This charge loss per unit cycle, when multiplied by the switching frequency, becomes a current loss. At high frequency this loss becomes significant and the power efficiency starts to decrease. I = f * q = f * C1(V1 - V2). V1 Examination of Figure 4 shows that the LTC1046 has the same switching action as the basic switched capacitor building block. With the addition of finite switch ON resistance and output voltage ripple, the simple theory, although not exact, provides an intuitive feel for how the device works. 1046 F02 Figure 2. Switched Capacitor Building Block Rewriting in terms of voltage and impedance equivalence, I= V1 - V 2 (1 / fC1) = V1 - V 2 REQUIV V+ (8) . SW1 BOOST A new variable, REQUIV, has been defined such that REQUIV = 1/fC1. Thus, the equivalent circuit for the switched capacitor network is as shown in Figure 3. 3x (1) OSC + C1 +2 OSC (7) SW2 CAP + (2) CAP - (4) VOUT (5) + V1 REQUIV REQUIV = 1 fC1 LV (6) V2 C2 RL CLOSED WHEN V + > 3.0V GND (3) C2 1046 F04 Figure 4. LTC1046 Switched Capacitor Voltage Converter Block Diagram 1046 F03 Figure 3. Switched Capacitor Equivalent Circuit Rev. C 6 For more information www.analog.com LTC1046 APPLICATIONS INFORMATION LV (Pin 6) The internal logic of the LTC1046 runs between V+ and LV (Pin 6). For V+ greater than or equal to 3V, an internal switch shorts LV to GND (Pin 3). For V+ less than 3V, the LV pin should be tied to ground. For V+ greater than or equal to 3V, the LV pin can be tied to ground or left floating. OSC (Pin 7) and BOOST (Pin 1) The switching frequency can be raised, lowered or driven from an external source. Figure 5 shows a functional diagram of the oscillator circuit. By connecting the BOOST (Pin 1) to V+, the charge and discharge current is increased and, hence, the frequency is increased by approximately three times. Increasing the frequency will decrease output impedance and ripple for higher load currents. Loading Pin 7 with more capacitance will lower the frequency. Using the BOOST pin in conjunction with external capacitance on Pin 7 allows user selection of the frequency over a wide range. Driving the LTC1046 from an external frequency source can be easily achieved by driving Pin 7 and leaving the BOOST pin open, as shown in Figure 6. The output current from Pin 7 is small, typically 15A, so a logic gate is capable of driving this current. The choice of using a V+ 2I I BOOST (1) CMOS logic gate is best because it can operate over a wide supply voltage range (3V to 15V) and has enough voltage swing to drive the internal Schmitt trigger shown in Figure 5. For 5V applications, a TTL logic gate can be used by simply adding an external pull-up resistor (see Figure 6). Capacitor Selection While the exact values of CIN and COUT are noncritical, good quality, low ESR capacitors such as solid tantalum are necessary to minimize voltage losses at high currents. For CIN the effect of the ESR of the capacitor will be multiplied by four, due to the fact that switch currents are approximately two times higher than output current, and losses will occur on both the charge and discharge cycle. This means that using a capacitor with 1 of ESR for CIN will have the same effect as increasing the output impedance of the LTC1046 by 4. This represents a significant increase in the voltage losses. For COUT the effect of ESR is less dramatic. COUT is alternately charged and discharged at a current approximately equal to the output current, and the ESR of the capacitor will cause a step function to occur, in the output ripple, at the switch transitions. This step function will degrade the output regulation for changes in output load current, and should be avoided. Realizing that large value tantalum capacitors can be expensive, a technique that can be used is to parallel a smaller tantalum capacitor with a large aluminum electrolytic capacitor to gain both low ESR and reasonable cost. Where physical size is a concern some of the newer chip type surface mount tantalum capacitors can be used. These capacitors are normally rated at working voltages in the 10V to 20V range and exhibit very low ESR (in the range of 0.1). REQUIRED FOR TTL LOGIC V+ LTC1046 OSC (7) ~14pF C1 + 1 2 3 4 I LV (6) BOOST CAP + GND CAP - V+ OSC LV VOUT 8 7 100k OSC INPUT 6 5 -(V +) + 2I NC SCHMITT TRIGGER 1046 F05 C2 1046 F06 Figure 5. Oscillator Figure 6. External Clocking Rev. C For more information www.analog.com 7 LTC1046 TYPICAL APPLICATIONS Negative Voltage Converter Figure 7 shows a typical connection which will provide a negative supply from an available positive supply. This circuit operates over full temperature and power supply ranges without the need of any external diodes. The LV pin (Pin 6) is shown grounded, but for V+ 3V, it may be floated, since LV is internally switched to GND (Pin 3) for V+ 3V. The output voltage (Pin 5) characteristics of the circuit are those of a nearly ideal voltage source in series with an 27 resistor. The 27 output impedance is composed of two terms: 1) the equivalent switched capacitor resistance (see Theory of Operation), and 2) a term related to the ON resistance of the MOS switches. At an oscillator frequency of 30kHz and C1 = 10F, the first term is: REQUIV = ( 1 ) fOSC / 2 * C1 on the typical curves of output impedance and power efficiency versus frequency. For C1 = C2 = 10F, the output impedance goes from 27 at fOSC = 30kHz to 225 at fOSC = 1kHz. As the 1/fC term becomes large compared to switch ON resistance term, the output resistance is determined by 1/fC only. Voltage Doubling Figure 8 shows a two diode, capacitive voltage doubler. With a 5V input, the output is 9.1V with no load and 8.2V with a 10mA load. LTC1046 1 2 3 4 V+ BOOST CAP + OSC LV GND CAP - VOUT 8 7 6 5 V+ 1.5V TO 6V + VD REQUIRED FOR V + < 3V + + VD 10F VOUT = 2 (VIN - 1) + = 10F 1046 F08 Figure 8. Voltage Doubler 1 = 6.7. 15 * 103 * 10 * 10 -6 Notice that the equation for REQUIV is not a capacitive reactance equation (XC = 1/C) and does not contain a 2 term. The exact expression for output impedance is complex, but the dominant effect of the capacitor is clearly shown Ultraprecision Voltage Divider An ultraprecision voltage divider is shown in Figure 9. To achieve the 0.0002% accuracy indicated, the load current should be kept below 100nA. However, with a slight loss in accuracy, the load current can be increased. LTC1046 1 LTC1046 10F + 2 3 4 BOOST CAP + GND CAP - V+ OSC LV VOUT V+ 1.5V TO 6V 8 7 6 REQUIRED FOR V + < 3V 5 VOUT = -V + TMIN TA TMAX + 1 10F 1046 F07 Figure 7. Negative Voltage Converter C1 10F 2 + V+ 0.002% 2 TMIN TA TMAX IL 100nA 3 4 + BOOST CAP + GND CAP - V+ OSC LV VOUT 8 7 V+ 3V TO 12V 6 5 1046 F09 C2 10F REQUIRED FOR V + < 6V Figure 9. Ultrtaprecision Voltage Divider Rev. C 8 For more information www.analog.com LTC1046 TYPICAL APPLICATIONS Battery Splitter Paralleling for Lower Output Resistance A common need in many systems is to obtain positive and negative supplies from a single battery or single power supply system. Where current requirements are small, the circuit shown in Figure 10 is a simple solution. It provides symmetrical positive or negative output voltages, both equal to one half the input voltage. The output voltages are both referenced to Pin 3 (output common). If the input voltage between Pin 8 and Pin 5 is less than 6V, Pin 6 should also be connected to Pin 3, as shown by the dashed line. Additional flexibility of the LTC1046 is shown in Figures Figure 11 and Figure 12. Figure 11 shows two LTC1046s connected in parallel to provide a lower effective output resistance. If, however, the output resistance is dominated by 1/fC1, increasing the capacitor size (C1) or increasing the frequency will be of more benefit than the paralleling circuit shown. Figure 12 makes use of "stacking" two LTC1046s to provide even higher voltages. In Figure 12, a negative voltage doubler or tripler can be achieved depending upon how Pin 8 of the second LTC1046 is connected, as shown schematically by the switch. LTC1046 1 C1 10F 2 + 3 4 V+ CAP + OSC LV GND CAP - VOUT 8 +VB /2 4.5V 7 REQUIRED FOR VB < 6V 6 5 -VB /2 -4.5V + 3V VB 12V C2 10F OUTPUT COMM0N 1046 F10 Figure 10. Battery Splitter LTC1046 1 C1 10F 2 + 3 4 V+ BOOST CAP + OSC LV GND CAP - V+ LTC1046 VOUT 1 8 7 6 C1 10F 5 2 + 3 4 V+ BOOST CAP + OSC LV GND CAP - VOUT 8 7 6 5 VOUT = -(V +) 1/4 CD4077 + OPTIONAL SYNCHRONIZATION CIRCUIT TO MINIMIZE RIPPLE C2 20F 1046 F11 Figure 11. Paralleling for 100mA Load Current FOR VOUT = -3V + V+ LTC1046 3 4 BOOST CAP + GND CAP - V OSC LV VOUT 7 + 10F + 2 C1 10F + 8 LTC1046 1 2 6 3 5 4 -(V +) 10F BOOST CAP + GND CAP - V+ OSC LV VOUT + 1 FOR VOUT = -2V + 8 7 6 5 + VB 9V BOOST VOUT 10F 1046 F12 Figure 12. Stacking for Higher Voltage Rev. C For more information www.analog.com 9 LTC1046 PACKAGE DESCRIPTION J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) .023 - .045 (0.584 - 1.143) HALF LEAD OPTION .045 - .068 (1.143 - 1.650) FULL LEAD OPTION .005 (0.127) MIN .405 (10.287) MAX 8 7 6 5 .025 (0.635) RAD TYP .220 - .310 (5.588 - 7.874) 1 .300 BSC (7.62 BSC) 2 3 4 .200 (5.080) MAX .015 - .060 (0.381 - 1.524) .008 - .018 (0.203 - 0.457) 0 - 15 NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS .045 - .065 (1.143 - 1.651) .014 - .026 (0.360 - 0.660) .100 (2.54) BSC .125 3.175 MIN J8 0801 OBSOLETE PACKAGE Rev. C 10 For more information www.analog.com LTC1046 PACKAGE DESCRIPTION N Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510 Rev I) .300 - .325 (7.620 - 8.255) .045 - .065 (1.143 - 1.651) .065 (1.651) TYP .008 - .015 (0.203 - 0.381) ( +.035 .325 -.015 8.255 +0.889 -0.381 .100 (2.54) BSC ) .130 .005 (3.302 0.127) .120 (3.048) .020 MIN (0.508) MIN .018 .003 N8 REV I 0711 (0.457 0.076) .400* (10.160) MAX 8 7 6 5 1 2 3 4 .255 .015* (6.477 0.381) NOTE: 1. DIMENSIONS ARE INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) Rev. C For more information www.analog.com 11 LTC1046 PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610 Rev G) .050 BSC .189 - .197 (4.801 - 5.004) NOTE 3 .045 .005 8 .245 MIN .160 .005 .010 - .020 x 45 (0.254 - 0.508) NOTE: 1. DIMENSIONS IN 5 .150 - .157 (3.810 - 3.988) NOTE 3 1 RECOMMENDED SOLDER PAD LAYOUT .053 - .069 (1.346 - 1.752) 0- 8 TYP .016 - .050 (0.406 - 1.270) 6 .228 - .244 (5.791 - 6.197) .030 .005 TYP .008 - .010 (0.203 - 0.254) 7 .014 - .019 (0.355 - 0.483) TYP INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 4. PIN 1 CAN BE BEVEL EDGE OR A DIMPLE 2 3 4 .004 - .010 (0.101 - 0.254) .050 (1.270) BSC SO8 REV G 0212 Rev. C 12 For more information www.analog.com LTC1046 REVISION HISTORY (Revision history begins at Rev C) REV DATE DESCRIPTION C 05/19 Obsolete CERDIP package PAGE NUMBER 2, 10 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license For is granted implication or otherwise under any patent or patent rights of Analog Devices. moreby information www.analog.com 13 LTC1046 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1044A 12V CMOS Voltage Converter Doubler or Inverter, 20mA IOUT, 1.5V to 12V Input Range LT 1054 Switched Capacitor Voltage Converter with Regulator Doubler or Inverter, 100mA IOUT, SO-8 Package LTC1550 Low Noise, Switched Capacitor Regulated Inverter < 1mVP-P Output Ripple, 900kHz Operation, SO-8 Package LT1611 1.4MHz Inverting Switching Regulator 5V to -5V at 150mA, Low Output Noise, SOT-23 Package LT1617 Micropower Inverting Switching Regulator (R) LTC1754/LTC1755 Micropower Regulated 5V Charge Pump in SOT-23 5V to -5V at 20A Supply Current, SOT-23 Package 5V/50mA, 13A Supply Current, 2.7V to 5.5V Input Range Rev. C 14 05/19 www.analog.com For more information www.analog.com ANALOG DEVICES, INC. 1991