LP3972_14 Datasheet, PDF (1/59 Pages) Texas Instruments – Power Management Unit for Advanced Application Processors

LP3972
www.ti.com
SNVS468J – SEPTEMBER 2006 – REVISED AUGUST 2011
Power Management Unit for Advanced Application Processors
Check for Samples: LP3972
FEATURES
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•2 Compatible With Advanced Applications
Processors Requiring DVM (Dynamic Voltage
Management)
• Three Buck Regulators for Powering High-
Current Processor Functions or I/Os
• Six LDOs for Powering RTC, Peripherals, and
I/Os
• Backup Battery Charger With Automatic
Switch for Lithium-Manganese Coin Cell
Batteries and Super Capacitors
• I²C Compatible High-Speed Serial Interface
• Software Control of Regulator Functions and
Settings
• Precision Internal Reference
• Thermal Overload Protection
• Current Overload Protection
• Tiny 40-Pin 5x5 mm WQFN Package
APPLICATIONS
• PDA Phones
• Smart Phones
• Personal Media Players
• Digital Cameras
• Application Processors
– Marvell PXA
– Freescale
– Samsung
DESCRIPTION
The LP3972 is a multi-function programmable Power Management Unit designed especially for advanced
application processors. The LP3972 is optimized for low-power handheld applications and provides six low-
dropout low-noise linear regulators, three DC/DC magnetic buck regulators, a back-up battery charger, and two
GPIOs. A high-speed serial interface is included to program individual regulator output voltages as well as on
and off control.
Key Specifications
• Buck Regulators
– Programmable V_OUT from 0.725 to 3.3V
– Up to 95% efficiency
– Up to 1.6A output current
– ±3% output voltage accuracy
• LDOs
– Programmable V_OUT of 1.0V–3.3V
– ±3% output voltage accuracy
– 150/300/400 mA output currents
– LDO_RTC 30 mA
– LDO1 300 mA
– LDO2 150 mA
– LDO3 150 mA
– LDO4 150 mA
– LDO5 400 mA
– 100 mV (typ) dropout
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2011, Texas Instruments Incorporated