Click here for production status of specific part numbers. MAX1044/ICL7660 Switched-Capacitor Voltage Converters General Description Features The MAX1044 and ICL7660 are monolithic, CMOS Miniature MAX Package switched-capacitor voltage converters that invert, double, 1.5V to 10.0V Operating Supply Voltage Range divide, or multiply a positive input voltage. They are 98% Typical Power-Conversion Efficiency pin compatible with the industry-standard ICL7660 and LTC1044. Operation is guaranteed from 1.5V to 10V with Invert, Double, Divide, or Multiply Input Voltages no external diode over the full temperature range. They BOOST Pin Increases Switching Frequencies deliver 10mA with a 0.5V output drop. The MAX1044 has (MAX1044) a BOOST pin that raises the oscillator frequency above No-Load Supply Current: 200A (max) at 5V the audio band and reduces external capacitor size No External Diode Required for Higher-Voltage requirements. Operation The MAX1044/ICL7660 combine low quiescent current and high efficiency. Oscillator control circuitry and four power Ordering Information appears at end of data sheet. MOSFET switches are included on-chip. Applications include generating a -5V supply from a +5V logic supply to power analog circuitry. For applications requiring more Pin Configurations power, the MAX660 delivers up to 100mA with a voltage drop of less than 0.65V. TOP VIEW Applications + -5V Supply from +5V Logic Supply (N.C.) BOOST 1 8 V+ Personal Communications Equipment MAX1044 Portable Telephones CAP+ 2 7 OSC ICL7660 Op-Amp Power Supplies GND 3 6 LV EIA/TIA-232E and EIA/TIA-562 Power Supplies Data-Acquisition Systems CAP- 4 5 V OUT Handheld Instruments Panel Meters DIP/SO/MAX Typical Operating Circuit V+ AND CASE 8 N.C. OSC 1 7 INPUT V+ CAP+ SUPPLY VOLTAGE LV CAP+ ICL7660 2 6 MAX1044 ICL7660 V GND OUT 3 5 CAP- NEGATIVE V 4 OUTPUT OUT VOLTAGE CAP- ( ) ARE FOR ICL7660 TO-99 GND NEGATIVE VOLTAGE CONVERTER 19-4667 Rev 3 6/19MAX1044/ICL7660 Switched-Capacitor Voltage Converters Absolute Maximum Ratings Supply Voltage (V+ to GND, or GND to V )..................10.5V CERDIP (derate 8.00mW/C above +70C) ................640mW OUT Input Voltage on Pins 1, 6, and 7 .......-0.3V V (V+ + 0.3V) TO-99 (derate 6.67mW/C above +70C) ...................533mW IN LV Input Current ..................................................................20A Operating Temperature Ranges Output Short-Circuit Duration (V+ 5.5V) ................Continuous MAX1044C /ICL7660C .............................0C to +70C Continuous Power Dissipation (T = +70C) MAX1044E /ICL7660E ......................... -40C to +85C A Plastic DIP (derate 9.09mW/C above +70C) ............727mW MAX1044M /ICL7660M ...................... -55C to +125C SO (derate 5.88mW/C above +70C) ........................471mW Storage Temperature Range ........................... -65C to + 150C MAX (derate 4.1mW/C above +70C) .....................330mW Lead Temperature (soldering, 10sec) .............................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (Circuit of Figure 1, V+ = 5.0V, LV pin = 0V, BOOST pin = open, I = 0mA, T = T to T , unless otherwise noted.) LOAD A MIN MAX MAX1044 ICL7660 PARAMETER CONDITIONS UNITS MIN TYP MAX MIN TYP MAX T = +25C 30 200 80 175 A R = , L T = 0C to +70C 200 225 pins 1 and 7 A no connection, Supply Current T = -40C to +85C 200 250 A A LV open T = -55C to +125C 200 250 A R = , pins 1 and 7 = V+ = 3V 10 L R = 10k, LV open 3.0 10.0 Supply Voltage L V Range (Note 1) R = 10k, LV to GND 1.5 10 1.5 3.5 L T = +25C 65 100 55 100 A I = 20mA, L T = 0C to +70C 130 120 A f = 5kHz, OSC T = -40C to +85C 130 140 A LV open T = -55C to +125C 150 150 A Output Resistance T = +25C 325 250 A f = 2.7kHz (ICL7660), OSC T = 0C to +70C 325 300 f = 1kHz (MAX1044), A OSC V+ = 2V, I = 3mA, L T = -40C to +85C 325 300 A LV to GND T = -55C to +125C 400 400 A V+ = 5V 5 10 C = 1pF, OSC Oscillator Frequency kHz LV to GND (Note 2) V+ = 2V 1 Power Efficiency R = 5k, T = +25C, f 5kHz, LV open 95 98 95 98 % L A OSC Voltage Conversion Efficiency R = , T = +25C, LV open 97.0 99.9 99.0 99.9 % L A Pin 1 = 0V 3 Oscillator Sink or V = 0V or V+, OSC A Source Current LV open Pin 1 = V+ 20 V+ = 2V 1.0 1.0 M Oscillator Impedance T = +25C A V+ = 5V 100 100 k Note 1: The Maxim ICL7660 and MAX1044 can operate without an external output diode over the full temperature and voltage ranges. The Maxim ICL7660 can also be used with an external output diode in series with pin 5 (cathode at V ) when OUT replacing the Intersil ICL7660. Tests are performed without diode in circuit. Note 2: f is tested with C = 100pF to minimize the effects of test fixture capacitance loading. The 1pF frequency is OSC OSC correlated to this 100pF test point, and is intended to simulate pin 7s capacitance when the device is plugged into a test socket with no external capacitor. For this test, the LV pin is connected to GND for comparison to the original manufacturers device, which automatically connects this pin to GND for (V+ > 3V). Maxim Integrated 2 www.maximintegrated.com