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LX7165 Datasheet(PDF) 1 Page - Microsemi Corporation |
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LX7165 Datasheet(HTML) 1 Page - Microsemi Corporation |
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1 / 24 page ![]() Copyright © 2016 Microsemi Page 1 Rev. 1.2, 09/192016 Analog Mixed Signal Group One Enterprise Aliso Viejo, CA 92656 USA, 1-800-713-4113, 949-380-6100, fax 949-215-4996 LX7165 3V to 5.5V, 5A Constant Frequency Hysteretic Synchronous Buck Regulator with I 2C Production Datasheet Description The LX7165 is a digitally controlled step‐down regulator IC with an integrated 40mΩ high‐side P‐channel MOSFET and a 14mΩ low‐side N‐channel MOSFET. It features Microsemi’s proprietary constant‐frequency hysteretic control engine for near‐instantaneous correction to line/load transients. It does not require high‐ESR output capacitors and incorporates energy‐ saving “PSM” (Power Save or Pulse Skip Mode) at light loads, to extend battery life in mobile applications. The LX7165 has an I 2C serial interface port for output voltage margining and monitoring if required (it can also operate in default mode). In addition it includes robust fault monitoring functions. The LX7165 will operate from 3V to 5.5V, and is readily available in 4 fixed output voltage options: 0.8, 0.9V, 0.95V, and 0.97V (no voltage divider is necessary). After start up, the reference voltage can be adjusted with I2C with a resolution 4.7mV between 0.6V and 1.2V. The output voltage can also be adjusted with an external voltage divider up to 3.3V. Features Constant Frequency Hysteretic Control Extremely Fast Line/Load Transient Response I2C for Output Adjustment (3.4Mbps) 1.875 MHz Switching Frequency Extremely Low‐R DSON MOSFETS Input Voltage Rail 3.3V to 5V Greater than 5A Output Current I2C Selectable Power Save Mode for Light‐Load Efficiency UVLO, OVP, OCP 0°C to +85°C Ambient Temperature Available in WLCSP‐20 (0.4mm pitch) RoHS Compliant Applications High Performance HDD Notebooks/Netbooks/Tablets/Slates Figure 1: Typical 5V to 1.8V at 5A schematic with or without I 2C implemented |
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