LP3906 - Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

LP3906 - Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface from the PowerWise® Family

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Design Tools	Reference Designs	Application Notes	Knowledge Base

Features

•	Compatible with advanced applications processors and FPGAs
•	2 LDOs for powering Internal processor functions and I/Os
•	High speed serial interface for independent control of device functions and settings
•	Precision internal reference
•	Thermal overload protection
•	Current overload protection
•	24-lead 5 × 4 × 0.8 mm LLP package
•	Software Programmable Regulators

Key Specification

Step-Down DC/DC Converter (Buck) Linear Regulators (LDO)

•	1.5A output current
•	Programmable Vout from:
•	Buck1 : 0.8V–2.0V
•	Buck2 : 1.0V–3.5V
•	Up to 96% efficiency
•	2 MHz PWM switching frequency
•	±3% output voltage accuracy
•	Automatic soft start
•	Programmable V_OUT of 1.0V–3.5V
•	±3% output voltage accuracy
•	300 mA output currents
•	25 mV (typ) Dropout

General Description

The LP3906 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, Microprocessors and DSPs. This device integrates two highly efficient 1.5A Step-Down DC/DC converters with dynamic voltage management (DVM), two 300mA Linear Regulators and a 400kHz I2C compatible interface to allow a host controller access to the internal control registers of the LP3906. More...

Applications

•	FPGA, DSP core power
•	Applications processors
•	Peripheral I/O power

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 3.5V; Buck: 0.8 to 3.5V

Channels 4 Channels

Dropout Voltage 0.08 Volt

Feedback Tolerance 3 %

PowerWise Technology Dynamic Voltage Scaling

Output1 VoutMax 2.0 Volt

Output1 IoutMax 1500 mA

Input Min Voltage 2.7 Volt

Input Max Voltage 5.5 Volt

Output Range LDOs: 1.0 to 3.5V; Buck: 0.8 to 3.5V

Channels 4 Channels

Dropout Voltage 0.08 Volt

Feedback Tolerance 3 %

PowerWise Technology Dynamic Voltage Scaling

Output1 VoutMax 2.0 Volt

Output1 IoutMax 1500 mA

Output1 Topology Buck

Output2 VoutMin 1.0 Volt

Output2 VoutMax 3.5 Volt

Output2 IoutMax 1500 mA

Output2 Topology Buck

Output3 VoutMin 1.0

Output3 VoutMax 3.5 Volt

Output3 IoutMax 300 mA

Output3 Topology LDO

Output4 VoutMin 1.0 Volt

Output4 VoutMax 3.5 Volt

Output4 IoutMax 300 mA

Output4 Topology LDO

Special Features 2 LDO regulators, 2 buck regulators

Topology Buck, LDO

Switching Frequency 2000 kHz

Adj Switch Frequency Yes

Sync Pin Yes

RegType Power Management Unit

Step-Down Yes

Step-Up No

Inverting No

Flyback No

Efficiency (peak) 95 %

Output Power 1.43 Watt

Adjustable Output Yes

Error Flag No

On/Off Pin Yes

Multiple Output Capability Yes

Temperature Min -40 deg C

Temperature Max 85 deg C

Automotive Selection Guide Yes

PowerWise Yes

View Using Catalog

Typical Performance

click for larger image

Also Recommended

Adjustable Outputs Version

Additional Resources

Design Tools (see below)

Application Notes (see below)

Connection Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LP3906 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface	4152 Kbytes	5-Sep-07	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

LP3906SQ-JXXIEV

Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

Full production

N/A

Buy Now

1+

$104.00

1

6 weeks

N/A

LP3906SQ-DJXI

24

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$2.20

reel
of
1000

NS
UZXYTT
06-DJXI

12 weeks

N/A

LP3906SQ-JXXI

24

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$2.20

reel
of
1000

NS
UZXYTT
06-JXXI

12 weeks

N/A

LP3906SQ-PPXP

24

NOPB

1

260

Full production

N/A

Buy Now

1K+

$2.20

reel
of
1000

NS
UZXYTT
06-PPXP

12 weeks

N/A

LP3906SQ-VPFP

24

NOPB

1

260

Full production

N/A

Buy Now

1K+

$2.20

reel
of
1000

NS
UZXYTT
06-VPFP

12 weeks

N/A

LP3906SQX-DJXI

24

NOPB

1

260

Full production

N/A

Buy Now

1K+

$2.20

reel
of
4500

NS
UZXYTT
06-DJXI

12 weeks

N/A

LP3906SQX-JXXI

24

NOPB

1

260

Full production

N/A

Buy Now

1K+

$2.20

reel
of
4500

NS
UZXYTT
06-JXXI

12 weeks

N/A

LP3906SQX-PPXP

24

NOPB

1

260

Full production

N/A

Buy Now

1K+

$2.20

reel
of
4500

NS
UZXYTT
06-PPXP

12 weeks

N/A

LP3906SQX-VPFP

24

NOPB

1

260

Full production

N/A

Buy Now

1K+

$2.20

reel
of
4500

NS
UZXYTT
06-VPFP

12 weeks

N/A

General Description

The LP3906 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, Microprocessors and DSPs. This device integrates two highly efficient 1.5A Step-Down DC/DC converters with dynamic voltage management (DVM), two 300mA Linear Regulators and a 400kHz I2C compatible interface to allow a host controller access to the internal control registers of the LP3906. The LP3906 additionally features programmable power-on sequencing and is offered in a tiny 5 x 4 x 0.8mm LLP-24 pin package.

Design Tools

Title	Size in Kbytes	Date
LP3906 Evaluation Board software	103 Kbytes	30-May-2007	View	Download
Flexible Power Management Solution for Low-Power Xilinx FPGAs Using the LP3906	615 Kbytes	23-Apr-2007	View Online	Download

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

Reference Designs

•	RD-161 - LP3906 Smart Power Reference Design - 4 outputs

Application Notes

Title	Size in Kbytes	Date
AN-1532: Application Note 1532 LP3906 Evaluation Kit	5066 Kbytes	16-Mar-07	Download

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

More Application Notes

Title	Size in Kbytes	Date
AN-1501: Application Note 1501 LP3905-30 Application Board Information	189 Kbytes	7-Mar-07	Download
AN-1501 (Chinese): Application Note 1501 LP3905-30 Application Board Information	180 Kbytes
AN-1527: Application Note 1527 LP3905-A3 Application Board Information	158 Kbytes	5-Nov-07	Download
AN-1527 (Chinese): Application Note 1527 LP3905-A3 Application Board Information	212 Kbytes
AN-1619: Application Note 1619 Evaluation Kit for LP3907 — Programmable Power Management Unit with 1 2 C Compatible Interface	8282 Kbytes	4-Sep-07	Download
AN-1619 (Chinese): Application Note 1619 Evaluation Kit for LP3907 — Programmable Power Management Unit with 1 2 C Compatible Interface	1278 Kbytes

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

[Information as of 5-Jul-2009]