+ LT1026 Voltage Converter FEATURES DESCRIPTIO n Generates + and from Single Input The LT 1026 is a switched capacitor voltage doubler and n Up to 18V Output inverter on a single monolithic die. Capable of operating n Only Needs Four 1m F Capacitors from a 4V to 10V input, it provides 7V to 18V output. n No Inductors Output currents of over 10mA are available. Two charge n 10mA Output Current Minimum pumps first double the input voltage then invert the n Operates Down to 4V doubled voltage. Manufactured in bipolar technology, the n No Latchup LT1026 is not susceptible to latchup and generates up to n 8-Pin Minidip 36V. U The LT1026 offers a convenient way of generating addi- APPLICATIO S tional system voltages without using inductors. Powering interface circuits, op amps or data acquisition circuitry off n Line Drivers logic supplies is simplified. n Op Amp Suppliers , LTC and LT are registered trademarks of Linear Technology Corporation. n Battery Splitters n RS232 Power TYPICAL APPLICATIO Output Voltage Voltage Doubler and Inverter C1 10 1F C = 1F 8 V = 5V IN 6 T = 25C A 4 1 8 C1 +V +V OUT OUT 2 2 7 + + 1F C2 C1 0 C2 LT1026 6 3 2 1F V C2 V IN IN 4 5 4 V OUT V GND OUT 6 1F 8 10 1026 TA01 0 5 10 15 20 25 LOAD CURRENT (mA) LT1026 TA02 1026fb 1 OUTPUT VOLTAGE (V) + + + U ULT1026 (Note 1) ABSOLUTE MAXIMUM RATINGS Supply Voltage ........................................................ 10V Operating Temperature Range + V ............................................................................ 20V LT1026C ................................................. 0 C to 70 C V ..........................................................................20V LT1026I .............................................. 40 C to 85 C Short-Circuit Duration ......................................... 10 sec LT1026M (OBSOLETE) ............... 55 C to 125 C Lead Temperature (Soldering, 10 sec)................. 300 C PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW +V TOP VIEW OUT 8 1 8 C1 +V OUT + C1 1 8 +V 1 C1 OUT C1 7 + + C2 2 7 C1 + + C2 2 7 C1 + C2 2 6 V IN C2 3 6 V IN C2 3 6 V IN V 4 5 GND 3 5 OUT GND C2 V 4 5 GND OUT 4 N8 PACKAGE S8 PACKAGE V OUT J8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO 8-LEAD CERDIP H PACKAGE 8-LEAD TO-5 METAL CAN T = 150 C, q = 100 C/W (N8) JMAX JA T = 150 C, q = 150 C/W JMAX JA T = 150 C, q = 150 C/W (S8) JMAX JA T = 150 C, q = 150 C/W JMAX JA ORDER PART ORDER PART ORDER PART S8 PART NUMBER NUMBER NUMBER MARKING LT1026CN8 1026 LT1026CH LT1026CJ8 LT1026CS8 1026I LT1026MH LT1026MJ8 LT1026IS8 OBSOLETE PACKAGES Consider the N8 or S8 Packages for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. The l denotes the specifications which apply over the full operating ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T = 25 C. A PARAMETERS CONDITIONS MIN TYP MAX UNITS Output Voltage V = 4V I = 0mA Positive l 6.5 7 V IN L (Note 2) I = 0mA Negative l 6 6.7 V L I = 10mA Positive l 5.25 5.7 V L I = 10mA Negative l 4.5 5 V L V = 5V I = 15mA Positive l 6.25 7 V IN L I = 15mA Negative l 5.5 6.2 V L V = 10V I = 0mA Positive l 18 18.5 V IN L I = 0mA Negative l 17.7 18 V L I = 10mA Positive l 16 17.6 V L I = 10mA Negative l 15.3 17 V L I = 15mA Positive l 15.25 17 V L I = 15mA Negative l 14.5 16.5 V L V = 5V I = 10mA, 10mA Positive l 6.25 7.2 V IN L Negative l 5.5 6.5 V V = 10V I = 10mA, 10mA Positive l 15 16.8 V IN L Negative l 14.25 15.75 V 1026fb 2 UW U U W W W