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LP3972
SNVS468L –SEPTEMBER 2006–REVISED NOVEMBER 2015
LP3972 Power Management Unit for Advanced Application Processors
1 Features 2 Applications
1
• Compatible With Advanced Applications
• Smart Phones
Processors Requiring Dynamic Voltage
• Personal Media Players
Management (DVM)
• Digital Cameras
• Backup Battery Charger With Automatic Switch for
• Application Processors
Lithium-Manganese Coin-Cell Batteries and Super
– Marvell PXA
Capacitors
– Freescale
• I
2
C-Compatible High-Speed Serial Interface
– Samsung
• Software Control of Regulator Functions and
Settings
3 Description
• Thermal and Current Overload Protections
The LP3972 is a multi-function programmable power
• Three Buck Regulators for Powering High-Current
management unit (PMU) designed especially for
Processor Functions or I/Os
advanced application processors. The LP3972 is
optimized for low-power handheld applications and
– Programmable V
OUT
from 0.725 V to 3.3 V
provides six low-dropout low-noise linear regulators,
– Up to 95% Efficiency and 1.6-A Output Current
three DC-DC magnetic buck regulators, a backup
– ±3% Output Voltage Accuracy
battery charger, and two GPIOs. A high-speed serial
interface is included to program individual regulator
• Six LDOs for Powering RTC, Peripherals, and
output voltages as well as on and off control.
I/Os
– Programmable V
OUT
of 1 V to 3.3 V
Device Information
(1)
– ±3% Output Voltage Accuracy
PART NUMBER PACKAGE BODY SIZE (NOM)
– LDO_RTC 30 mA
LP3972 WQFN (40) 5.00 mm × 5.00 mm
– LDO1 300 mA
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
– LDO2 150 mA
– LDO3 150 mA
– LDO4 150 mA
– LDO5 400 mA
Simplified Schematic
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.
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 5 Seite 6
- ・ Abmessungen des Paketumrisses on Seite 58 Seite 60 Seite 61
- ・ Markierungsinformationen on Seite 58 Seite 59
- ・ Blockdiagramm on Seite 1 Seite 16
- ・ Typisches Anwendungsschaltbild on Seite 25 Seite 48 Seite 49
- ・ Technische Daten on Seite 3 Seite 7
- ・ Anwendungsbereich on Seite 1 Seite 25 Seite 26 Seite 63
- ・ Elektrische Spezifikation on Seite 8 Seite 9 Seite 10 Seite 11
