SS6611

www.DataSheet4U.com SS6610/11 High Efficiency Synchronous Step-up DC/DC Converter FEATURES High efficiency. (93% when VIN=2.4V, VOUT=3.3V, IOUT=200mA) Output current up to 500mA. (SS6610 at VIN=2.4V and VOUT=3.3V) Quiescent supply current of 20mA. Power-saving shutdown mode (0.1µA typical). Internal synchronous rectifier (no external diode required). On-chip low-battery detector. Low battery hysteresis Space-saving package: MSOP-8 DESCRIPTION The SS6610/SS6611 are high-efficiency step-up DC/DC converters, with a start-up voltage as low as 0.8V, and an operating voltage down to 0.7V. Consuming only 20µA of quiescent current, these devices include a built-in synchronous rectifier that reduces size and cost by eliminating the need for an external Schottky diode, and improves overall efficiency by minimizing losses. The switching frequency can range up to 500KHz depending on the load and input voltage. The output voltage can be easily set; by two external resistors or 1.8V to 5.5V; connecting FB to OUT to get 3.3V; or connecting to GND to get 5.0V. The peak current of the internal switch is fixed at 1.0A (SS6610) or 0.65A (SS6611) for design flexibility. APPLICATIONS Palmtop & Notebook Computers. PDAs Wireless Phones Pocket Organizers. Digital Cameras. Hand-Held Devices with 1 to 3 Cells of NiMH/NiCd Batteries. TYPICAL APPLICATION CIRCUIT VIN + 47µF OFF SHDN SS6610 SS6611 Low Battery Detection LBI REF 0.1µF GND LX OUT 22µH Output 3.3V, 5.0V or Adj. (1.8V to + 5.5V) up to 47µF...