LP3910 - Power Management IC for Hard Drive Based Portable Media Players

	LP3910 - Power Management IC for Hard Drive Based Portable Media Players from the PowerWise® Family

Datasheet	Packaging	Samples & Pricing	Design Tools	Knowledge Base

Features

•	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
•	2 High-efficiency DVS Buck converters
•	Wide load range Buck-Boost DC/DC converter
•	400 kHz I 2C compatible interface
•	Linear constant-current / constant-voltage charger for single cell lithium-ion batteries
•	USB and Adapter charging
•	System power supply management
•	6x6x0.8mm 48 LLP package
•	Voltage and thermal supervisory circuits
•	Continuous battery voltage monitoring
•	Interrupt Request output with 8 sources

Key Specification

•	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
•	BUCK-Boost: 1000 mA, 1.8V–3.3V
•	50 mΩ battery path resistance
•	100 mA–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

General Description

The LP3910 is a programmable system power management unit that is optimized for HDD-based Portable Media Players. More...

Applications

•	Hard drive-based media players
•	Portable gaming players
•	Portable navigation devices

Typical Application

*click for larger image

Parametric Table expand

Parametric Table collapse

Input Min Voltage 2.7 Volt

Input Max Voltage 5.5 Volt

Output Range LDOs: 1.0 to 3.3V; Buck: 0.8 to 3.3V

Channels 5 Channels

PowerWise Technology Dynamic Voltage Scaling

Topology Buck, LDO, Buck/Boost, Battery Charger

Input Min Voltage 2.7 Volt

Input Max Voltage 5.5 Volt

Output Range LDOs: 1.0 to 3.3V; Buck: 0.8 to 3.3V

Channels 5 Channels

Dropout Voltage 0.03 Volt

PowerWise Technology Dynamic Voltage Scaling

Feedback Tolerance 3 %

Output1 VoutMin 0.8 Volt

Output1 VoutMax 3.3 Volt

Output1 IoutMax 600 mA

Output1 Topology Buck

Output2 VoutMin 0.8 Volt

Output2 VoutMax 3.3 Volt

Output2 IoutMax 600 mA

Output2 Topology Buck

Output3 VoutMin 3.3

Output3 VoutMax 3.3 Volt

Output3 IoutMax 1000 mA

Output3 Topology Buck

Output4 VoutMin 1.0 Volt

Output4 VoutMax 3.3 Volt

Output4 IoutMax 300 mA

Output4 Topology Buck

Special Features 2 Bucks, Buck/Boost, 2 LDOs, I2C programmability / interface, Dual input Battery Charger

Topology Buck, LDO, Buck/Boost, Battery Charger

Switching Frequency 2000 kHz

Adj Switch Frequency Yes

Sync Pin No

RegType Power Management Unit

Step-Down Yes

Step-Up No

Inverting No

Flyback No

Efficiency (peak) 95 %

Adjustable Output Yes

Error Flag No

On/Off Pin Yes

Multiple Output Capability Yes

Temperature Min -40 deg C

Temperature Max 85 deg C

PowerWise Yes

View Using Catalog

Typical Performance

click for larger image

Also Recommended

For Flash Based Media Players

Additional Resources

Design Tools (see below)

Connection Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LP3910 Power Management IC for Hard Drive Based Portable Media Players	7933 Kbytes	3-Sep-08	View Online Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Qty

Qty

$US each

LP3910SQ-AA

LLP

48

NOPB

1

260

N/A

Full production

N/A

Samples

1K+

$3.95

reel
of
250

NS
UZXYTT
L3910-AA

6 weeks

N/A

LP3910SQX-AA

LLP

48

NOPB

1

260

N/A

Full production

N/A

1K+

$3.95

reel
of
2500

NS
UZXYTT
L3910-AA

12 weeks

N/A

General Description

The LP3910 is a programmable system power management unit that is optimized for HDD-based Portable Media Players.

The LP3910 incorporates 2 low-dropout LDO voltage regulators, 2 integrated Buck DC/DC converters with Dynamic Voltage Scaling (DVS), 1 wide load range Buck-Boost DC/DC converter with programmable output voltage, 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 LP3910 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 Buck-Boost DC/DC converter targets the power management of Hard Disk Drives and maintains a typical operating voltage of 3.3V ±5% with a battery voltage below or above this output level. The Buck-Boost output voltage can be selected to be as low as 1.8V.

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 I 2C compatible interface.

The LP3910 is available in a thermally-enhanced 6x6x0.8 mm 48 LLP package and operates over an ambient temperature range of –40°C to +85°C.

Design Tools

Title	Size in Kbytes	Date
Powering Portable Media Players			View

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Application Notes

Title	Size in Kbytes	Date
AN-1598: Application Note 1598 LP3910 Evaluation Kit	5124 Kbytes	28-Aug-07	Download
AN-1608: Application Note 1608 Powering Portable Media Players (PMP) with Innovative Solutions	123 Kbytes	6-Sep-07	Download
AN-1608 (Chinese): Application Note 1608 Powering Portable Media Players (PMP) with Innovative Solutions	405 Kbytes

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 20-Nov-2008]