MAX1719/MAX1720/MAX1721 19-1439 Rev 2 4/04 SOT23, Switched-Capacitor Voltage Inverters with Shutdown General Description Features The ultra-small MAX1719/MAX1720/MAX1721 monolithic, 1nA Logic-Controlled Shutdown CMOS charge-pump inverters accept input voltages 6-Pin SOT23 Package ranging from +1.5V to +5.5V. The MAX1720 operates at 12kHz, and the MAX1719/MAX1721 operate at 125kHz. 99.9% Voltage Conversion Efficiency High efficiency, small external components, and logic- 50A Quiescent Current (MAX1720) controlled shutdown make these devices ideal for both +1.5V to +5.5V Input Voltage Range battery-powered and board-level voltage conversion applications. 25mA Output Current Oscillator control circuitry and four power MOSFET Requires Only Two 1F Capacitors switches are included on-chip. A typical MAX1719/ (MAX1719/MAX1721) MAX1720/MAX1721 application is generating a -5V supply from a +5V logic supply to power analog circuitry. All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current. For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see the MAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861 Ordering Information deliver up to 50mA. For regulated outputs (up to -2 x V ), IN refer to the MAX868. The MAX860/MAX861 and MAX868 PIN- SOT PART TEMP RANGE are available in space-saving MAX packages. PACKAGE TOP MARK MAX1719EUT -40C to +85C 6 SOT23-6 AACA MAX1720EUT -40C to +85C 6 SOT23-6 AABS Applications MAX1721EUT -40C to +85C 6 SOT23-6 AABT Local Negative Supply from a Positive Supply Small LCD Panels GaAs PA Bias Supply Handy-Terminals, PDAs Battery-Operated Equipment Pin Configuration Typical Operating Circuit 1F TOP VIEW OUT 1 6 C1+ C1+ C1- NEGATIVE INPUT OUTPUT 1.5V to 5.5V OUT IN -1 V IN MAX1719 IN 2 5 SHDN (SHDN) 25mA MAX1720 MAX1721 MAX1721 1F C1- 3 4 GND SHDN ON OFF GND SOT23-6 ( ) ARE FOR MAX1719 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.SOT23, Switched-Capacitor Voltage Inverters with Shutdown ABSOLUTE MAXIMUM RATINGS IN to GND.................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A OUT to GND .............................................................-6V to +0.3V 6-Pin SOT23 (derate 8.7mW/C above +70C).................696mW C1+, SHDN, SHDN to GND.........................-0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C IN C1- to GND...............................................(V - 0.3V) to +0.3V Junction Temperature......................................................+150C OUT OUT Output Current..........................................................100mA Storage Temperature Range .............................-65C to +150C OUT Short Circuit to GND..............................................Indefinite Lead Temperature (soldering, 10s) .................................+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 (V = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = 10F (MAX1720), C1 = C2 = 1F IN (MAX1719/MAX1721), circuit of Figure 1, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = +25C 1.25 5.5 A MAX1720 R = 10k L T = 0C to + 85C 1.5 5.5 A Supply Voltage Range V V IN T = +25C 1.4 5.5 A MAX1719/MAX1721 R = 10k L T = 0C to + 85C 1.5 5.5 A MAX1720 50 90 Quiescent Supply Current I T = +25C A CC A (Note 3) MAX1719/MAX1721 350 650 SHDN = IN (MAX1719), T = +25C 0.001 1 A Shutdown Supply Current I A SHDN SHDN = GND T = +85C 0.02 A (MAX1720/MAX1721) MAX1720 712 17 Oscillator Frequency f T = +25C kHz OSC A MAX1719/MAX1721 70 125 180 Voltage Conversion Efficiency I = 0, T = +25C 99 99.9 OUT A % T = +25C 23 50 A Output Resistance (Note 1) R I = 10mA O OUT T = 0C to +85C 65 A SHDN = IN (MAX1719), SHDN = GND OUT to GND R , (MAX1720/MAX1721), OUT is internally 412 O SHDN Shutdown Resistance forced to GND in shutdown +2.5V V +5.5V 2.0 IN SHDN/ SHDN Input Logic High V V IH V V +2.5V V - 0.2 IN (MIN) IN IN +2.5V V +5.5V 0.6 IN V V SHDN/ SHDN Input Logic Low IL V V +2.5V 0.2 IN (MIN) IN T = +25C -100 0.05 100 A SHDN/ SHDN = GND SHDN/ SHDN Bias Current I , I nA IL IH or V IN T = +85C 10 A MAX1720 800 Wake-Up Time from Shutdown I = 5mA s OUT MAX1719/MAX1721 80 2 MAX1719/MAX1720/MAX1721