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LP3971
www.ti.com
SNVS432V –JANUARY 2006–REVISED MAY 2013
LP3971 Power Management Unit for Advanced Application Processors
Check for Samples: LP3971
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FEATURES
KEY SPECIFICATIONS
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• Compatible with Advanced Applications
• Buck Regulators
Processors Requiring DVM (Dynamic Voltage
– Programmable V
OUT
from 0.725 to 3.3V
Management)
– Up to 95% Efficiency
• Three Buck Regulators for Powering High
– Up to 1.6A Output Current
Current Processor Functions or I/O's
– ±3% Output Voltage Accuracy
• 6 LDO's for Powering RTC, Peripherals, and
• LDO’s
I/O's
– Programmable VOUT of 1.0V–3.3V
• Backup Battery Charger with Automatic
– ±3% output voltage accuracy
Switch for Lithium-Manganese Coin Cell
Batteries and Super Capacitors – 150/300/370 mA output currents
• I
2
C Compatible High Speed Serial Interface – LDO RTC 30 mA
• Software Control of Regulator Functions and – LDO 1 300 mA
Settings
– LDO 2 150 mA
• Precision Internal Reference
– LDO 3 150 mA
• Thermal Overload Protection
– LDO 4 150 mA
• Current Overload Protection
– LDO 5 370 mA
• Tiny 40-pin 5x5 mm WQFN Package
– 100 mV (typ) dropout
APPLICATIONS
DESCRIPTION
The LP3971 is a multi-function, programmable Power
• PDA Phones
Management Unit, designed especially for advanced
• Smart Phones
application processors. The LP3971 is optimized for
• Personal Media Players
low power handheld applications and provides 6 low
• Digital Cameras
dropout, low noise linear regulators, three DC/DC
magnetic buck regulators, a back-up battery charger
• Application Processors
and two GPIO’s. A high speed serial interface is
– Marvell PXA
included to program individual regulator output
– Freescale
voltages as well as on/off control.
– Samsung
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 4 Seite 5
- ・ Abmessungen des Paketumrisses on Seite 47 Seite 49 Seite 50
- ・ Markierungsinformationen on Seite 47 Seite 48
- ・ Blockdiagramm on Seite 38
- ・ Technische Daten on Seite 1 Seite 6 Seite 16
- ・ Anwendungsbereich on Seite 1 Seite 38 Seite 39 Seite 40 Seite 52
- ・ Elektrische Spezifikation on Seite 6 Seite 7 Seite 14 Seite 16
