SS6611G

SS6610/11G High-efficiency Synchronous Step-up DC/DC Converter PRODUCT SUMMARY High efficiency boost converter Output current up to 500mA No external diode required DESCRIPTION The SS6610/11G 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 m inimizing losses. The switching frequency can range up to 500KHz depending on the load and input voltage. The output voltage can be easily set by: 1) two external resistors for 1.8V to 5.5V; 2) connecting FB to OUT to get 3.3V; or 3) connecting FB to GND to get 5.0V. The peak current of the internal switch is fixed at 1A (SS6610G) or 0.65A (SS6611G) for design flexibility. FEATURES Quiescent supply current of 20mA. Power-saving shutdown mode (0.1µA typical). Internal synchronous rectifier On-chip low-battery detector. Low battery hysteresis Pb-free, RoHS compliant MSOP-8 APPLICATIONS Palmtop and 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 SS6610G SS6611G Low Battery Detection LBI REF 0.1µF GND LX OUT 22µH Output 3.3V, 5.0V or adjustable from 1.8V to 5.5V + 47µF up to 300mA output Low-battery Detect Out ON LBO FB 4/21/2006 Rev.3.01 www.SiliconStandard.com 1 of 16 SS6610/11G ORDERING INFORMATION S S6 610GO TR SS6 611GO TR PIN CONFIGURATION M S O P -8 T O P V I EW P acking TR: T ape and reel P ackage type GO: RoHS-compliant MSOP - 8 FB 1 LBI 2 LBO 3 REF 4 8 7 6 5 OUT LX G ND SHDN E xample: S S6 610GO TR S S6610 i n RoHS-compliant MSO P- 8 p ackage, shipped on t ape and reel ABSOLUTE MAXIMUM RATINGS Supply voltage (OUT to GND) Switch voltage (LX to GND) SHDN , LBO to GND 8.0V VOUT+ 0.3V 6.0V VOUT+0.3V -1.5A to +1.5A -1.5A to +1.5A -40°C ~ +85°C -65°C ~150°C LBI, REF, FB, to GND Switch current (LX) Output current (OUT) Operating temperature range Storage temperature range TEST CIRCUIT Refer to the typical application circuit on page 1. 4/21/2006 Rev.3.01 www.SiliconStandard.com 2 of 16 SS6610/11G ELECTRICAL CHARACTERISTICS (VIN = 2.0V, VOUT = 3.3V (FB = VOUT),RL = ∞ , unless otherwise specified.) MIN. TYP. 0.7 1.1 5.5 0.8 -2 1.1 PARAMETER Minimum input voltage Operating voltage Start-up voltage Start-up voltage temp. coeff. Output voltage range Output voltage TEST CONDITIONS MAX. UNIT V V V mV/°C RL=3kΩ (Note1) VIN