LP3972_15 Datasheet, PDF (1/63 Pages) Texas Instruments – Power Management Unit for Advanced Application Processors

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LP3972
SNVS468L – SEPTEMBER 2006 – REVISED NOVEMBER 2015
LP3972 Power Management Unit for Advanced Application Processors
1 Features
•1 Compatible With Advanced Applications
Processors Requiring Dynamic Voltage
Management (DVM)
• 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
• Thermal and Current Overload Protections
• Three Buck Regulators for Powering High-Current
Processor Functions or I/Os
– Programmable V_OUT from 0.725 V to 3.3 V
– Up to 95% Efficiency and 1.6-A Output Current
– ±3% Output Voltage Accuracy
• Six LDOs for Powering RTC, Peripherals, and
I/Os
– Programmable V_OUT of 1 V to 3.3 V
– ±3% Output Voltage Accuracy
– LDO_RTC 30 mA
– LDO1 300 mA
– LDO2 150 mA
– LDO3 150 mA
– LDO4 150 mA
– LDO5 400 mA
2 Applications
• Smart Phones
• Personal Media Players
• Digital Cameras
• Application Processors
– Marvell PXA
– Freescale
– Samsung
3 Description
The LP3972 is a multi-function programmable power
management unit (PMU) 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 backup
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP3972
WQFN (40)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Back-up +
VIN
Battery
-
LDO1
BUCK1
LDO2
LDO3
BUCK2
LDO4
LP3972
LDO5
BUCK3
RTC
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.