LP3913 Datasheet, PDF (1/70 Pages) Texas Instruments – Power Management IC for Flash Memory-Based Portable Media Players

LP3913
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SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
LP3913 Power Management IC for Flash Memory-Based Portable Media Players
Check for Samples: LP3913
FEATURES
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•2 2 Low-Dropout Regulators -- LDO1 is Used for
General Purpose Applications, LDO2 is Used
for Low-Noise Analog Applications. Both
LDOs Have Programmable Output Voltages.
• Green and Red LED Charger Status Drivers
• 4-Channel 8-Bit Dual Slope A/D Converter
• 3 High-Efficiency DVS Buck Converters
• 400 kHz I²C Compatible Interface
• Linear Constant-Current/Constant-Voltage
Charger for Single Cell Lithium-Ion Batteries
• USB and Adapter Charging
• System Power Supply Management
• 6x6 x 0.8 mm 48 WQFN Package
• Voltage and Thermal Supervisory Circuits
• Continuous Battery Voltage Monitoring
• Interrupt Request Output with 8 Sources
• LP3913 is Pin-for-Pin and Software-Compatible
with the LP3910 Hard Drive Based PMIC
KEY SPECIFICATIONS
• LDO1: 150 mA, 1.2V–3.3V
• LDO2: 150 mA, 1.3V–3.3V
• Buck1: 600 mA, 0.8V–2.0V
• Buck2: 600 mA, 1.8V–3.3V
• Buck3: 500 mA, 1.8V–3.3V
• 50 mΩ Battery Path Resistance
• 100 mA to 1000 mA Full-Rate Charge Current
Using Wall Adapter
• Selectable 0.05C and 0.1C EOC Current
• USB Current Limit of 100 mA, 500 mA, and 800
mA
• USB Pre-Qual Current of 50 mA
• Selectable 4.1V, 4.2V or 4.38V battery
termination voltages
• 0.35% Battery Termination Accuracy
• ±1 LSB INL/DNL on 8-bit A/D Converter
APPLICATIONS
• Flash-Based Portable Media Players
• Portable Gaming Devices
• Portable Navigation Systems
DESCRIPTION
The LP3913 is a programmable system power
management unit that is optimized for Flash Memory
based Portable Media Players.
The LP3913 incorporates 2 low-dropout LDO voltage
regulators, 3 integrated Buck DC/DC converters with
Dynamic Voltage Scaling (DVS), a 4-channel 8-bit
A/D converter, and a dual source Li-Ion/polymer
battery charger. The charger has the capability to
charge and maintain a single cell battery from a
regulated wall adapter or USB power. When both
USB and adapter sources are present, then the
adapter source takes precedence and switching
between USB and adapter power sources is
seamless. In addition, the battery charger supports
power routing, which allows system usage
immediately after an external power source has been
detected. The LP3913 also incorporates some
advanced battery management functions such as
battery temperature measurement, reverse current
blocking for USB, LED charger status indication,
thermally regulated internal power FETs, battery
voltage monitoring, over-current protection and a
10–hour safety timer.
The 4-channel A/D converter measures the battery
voltage and charge current, which can be used for
fuel gauging. Two undedicated channels can be used
to measure other analog parameters such as
discharge current, battery temperature, keyboard
resistor scanning and more.
The various IC parameters are programmable
through a 400 kHz I²C compatible interface.
The LP3913 is available in a thermally-enhanced
6x6x0.8 mm 48 WQFN package and operates over
an ambient temperature range of –40°C to +85°C.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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 © 2006–2013, Texas Instruments Incorporated