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SS6612 Datasheet(PDF) 1 Page - Silicon Standard Corp. |
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SS6612 Datasheet(HTML) 1 Page - Silicon Standard Corp. |
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1 / 16 page  www.SiliconStandard.com 1 of 16 SS6612 Rev.2.02 12/06/2003 High-Efficiency Synchronous Step-up DC/DC Converter with Selectable Current Limit FEATURES High efficiency (9 3 % with VIN =2.4V, VOUT= 3.3V, IOUT=200mA) Output current up to 500mA. (VIN=2.4V, at VOUT=3.3V, CLSEL=OUT) Quiescent supply current of 20 µA Power-saving shutdown mode (0.1 µA typical). Internal synchronous rectifier (no external diode required). Selectable current limit for reduced ripple. Low-noise, anti-ringing feature. On-chip low-battery detector. Low-battery hysteresis. Space-saving package: MSOP-10 APPLICATIONS Palmtop & Notebook Computers. PDAs Wireless Phones Pocket Organizers. Digital Cameras. Hand-Held Devices with 1 to 3 Cells of NiMH/NiCd Batteries. DESCRIPTION The SS6612 is a high-efficiency step-up DC/DC converter, with a start-up voltage as low as 0.8V, and an operating voltage down to 0.7V. Consuming only 20 µA of quiescent current, this device includes a built-in synchronous rec- tifier 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 volt- age. The output voltage can be easily set; by two external resistors for 1.8V to 5.5V; con- necting FB to OUT to get 3.3V; or connecting to GND to get 5.0V. For additional design flexibil- ity, the peak current of the internal switch is selectable (0.65A or 1.0A). The SS6612 also features a circuit that eliminates noise caused by inductor ringing. TYPICAL APPLICATION CIRCUIT Output 3.3V, 5.0V or Adj. (1.8V to 5.5V) up to 300mA Low-battery Detect Out SS6612 OUT FB GND REF LBO SHDN LX LBI + ON OFF + Low Battery Detection 0.1 µF VIN 22 µH 47 µF 47 µF Selectable Current Limit (1.0A or 0.65A) CLSEL 200 Ω BATT |
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