LP3971SQ-45B6

• Compatible with advanced application processors requiring DVM (Dynamic Voltage Management)
• A triple buck regulator is used to drive high-current processor functions or I/O
• 6 LDO powered RTC, peripherals and I/O
• Automatic switching of backup battery charger, lithium manganese button battery and supercapacitor
• I 2 C-compatible high-speed serial interface
• Software controls adjustment functions and settings
• Precision internal reference
• Thermal overload protection
• Current overload protection
• Tiny 40-pin 5x5mm LLP package

illustrate

The LP3971 is a versatile, programmable power management unit, especially for advanced application processor designs. The LP3971 is optimized for low-power handheld applications and offers six low dropout, low noise linear regulators, three DC/DC magnetic buck regulators, a backup battery charger, and two GPIOs. Includes a high-speed serial interface and on/off control scheme, separate regulator output voltage.

Main specifications Buck regulator

• From 0.725 to 3.3V_ProgrammableV OUT
• Up to 95% efficiency
• Up to 1.6A output current
• ± 3% output voltage accuracy

• Programmable V_OUTis 1.0V - 3.3V
• ± 3% output voltage accuracy
• 150/300/370 mA output current
• LDO RTC of 30 mA
• LDO of 1 300 mA
• LDO 2 150 mA
• LDO 3 150 mA
• LDO 4 150 mA
• LDO of 5 370 mA
• 100 mV dropout voltage (typical)

apply

• PDA phones
• Smartphones
• Personal media player
• Digital cameras
• Application processor
• Marvell's PXA
• Freescale
• Samsung