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L6730 Dataheets PDF



Part Number L6730
Manufacturers ST Microelectronics
Logo ST Microelectronics
Description (L6730 / L6730B) Adjustable step-down controller
Datasheet L6730 DatasheetL6730 Datasheet (PDF)

www.DataSheet4U.com L6730 L6730B Adjustable step-down controller with synchronous rectification Features ■ ■ ■ Input voltage range from 1.8V to 14V Supply voltage range from 4.5V to 14V Adjustable output voltage down to 0.6V with ±0.8% accuracy over line voltage and temperature (0°C~125°C) Fixed frequency voltage mode control tON lower than 100ns 0% to 100% duty cycle Selectable 0.6V or 1.2V internal voltage reference External input voltage reference Soft-start and inhibit High current embedde.

  L6730   L6730



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www.DataSheet4U.com L6730 L6730B Adjustable step-down controller with synchronous rectification Features ■ ■ ■ Input voltage range from 1.8V to 14V Supply voltage range from 4.5V to 14V Adjustable output voltage down to 0.6V with ±0.8% accuracy over line voltage and temperature (0°C~125°C) Fixed frequency voltage mode control tON lower than 100ns 0% to 100% duty cycle Selectable 0.6V or 1.2V internal voltage reference External input voltage reference Soft-start and inhibit High current embedded drivers Predictive anti-crossconduction control Selectable uvlo threshold (5V or 12V BUS) Programmable high-side and low-side RDS(on) sense over-current-protection Switching frequency programmable from 100kHz to 1MHz Master/slave synchronization with 180° phase shift Pre-bias start up capability (L6730) Selectable source/sink or source only capability after soft-start (L6730) Selectable constant current or hiccup mode overcurrent protection after soft-start (L6730B) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ HTSSOP20 Power good output with programmable delay Over voltage protection with selectable latched/not-latched mode Thermal shut-down Package: HTSSOP20 Applications ■ ■ ■ ■ ■ High performance / high density DC-DC modules Low voltage distributed DC-DC niPOL converters DDR memory supply DDR memory bus termination supply Order Codes Part number L6730 L6730TR L6730B L6730BTR June 2006 Package HTSSOP20 HTSSOP20 HTSSOP20 HTSSOP20 Rev 2 Packing Tube Tape & Reel Tube Tape & Reel 1/52 www.st.com 52 Contents L6730 - L6730B Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 2.2 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 4 5 Pin connections and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.14 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Internal LDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Bypassing the LDO to avoid the voltage drop with low Vcc . . . . . . . . . . . . . 14 Internal and external references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . ..


K4M511633C L6730 L6730B


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