19-1792; Rev 0; 9/00 SC70 Inverting Charge Pumpswith ShutdownMAX1852/MAX1853General DescriptionFeatures The MAX1852/MAX1853 monolithic, CMOS charge- ♦ 30mA Output Current pump voltage inverters in the ultra-small SC70 package feature a low 15Ω output resistance, permitting loads ♦ Low 15 Ω Output Resistance up to 30mA with maximum efficiency. The MAX1852/ ♦ 68µA Supply Current (MAX1852) MAX1853 are available with operating frequencies of 50kHz and 200kHz, respectively, allowing optimization ♦ Requires Only Two 0.68µF Capacitors (MAX1853) of supply current or external component size. Small ♦ +2.5V to +5.5V Input Voltage Range external components and micropower shutdown mode make these devices ideal for both battery-powered and ♦ 0.1µA Logic-Controlled Shutdown board-level voltage conversion applications. ♦ Two Switching Frequencies Oscillator control circuitry and four power-MOSFET 50kHz (MAX1852) switches are included on-chip. Applications include 200kHz (MAX1853) generating a negative supply from a +5V or +3.3V logic supply to power analog circuitry. Both versions come in ♦ Slew-Rate Limited to Reduce EMI a 6-pin SC70 package that is 40% smaller than a ♦ Ultra-Small 6-Pin SC70 Package SOT23. Applications Negative Supply from +5V or +3.3V Logic Supplies Small LCD Panels Ordering Information GaAsFET Bias Supplies TEMP.PIN -TOP Handy-Terminals, PDAs PARTRANGEPA C K A G EMARK Battery-Operated Equipment MAX1852 EXT - 40°C to + 85°C 6 SC70 AAL MAX1853 EXT - 40°C to + 85°C 6 SC70 AAM Typical Operating CircuitPin Configuration 0.68µF TOP VIEW C1+ C1- INPUT NEGATIVE OUT 1 6 C1+ 2.5V TO 5.5V OUTPUT IN OUT -1 ✕ VIN 30mA MAX1852 GND 2 5 C1- MAX1853 MAX1853 0.68µF ON SHDN SHDN 3 4 IN OFF GND SC70-6________________________________________________________________ Maxim Integrated Products1For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
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