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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 |
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 I
2C 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.
Key Specification
Step-Down DC/DC Converter (Buck)
| | 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 |
Linear Regulators (LDO)
| | Programmable VOUT of 1.0V–3.5V
|
| | ±3% output voltage accuracy |
| | 300 mA output currents |
| | 25 mV (typ) Dropout |
Applications
| | FPGA, DSP core power |
| | Applications processors |
| | Peripheral I/O power |
|
apps diagram
|
| Paramaters / Values | LP3906 | LM26480 |
| Input Min Voltage | 2.7 Volt
| 2.8 Volt
|
| Input Max Voltage | 5.5 Volt
| 5.5 Volt
|
| Output Range | LDOs: 1.0 to 3.5V; Buck: 0.8 to 3.5V
| LDOs: 1.0 to 3.3V; Buck: 0.8 to 3.3V
|
| 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
| 2 Bucks, 2 LDOs, Resistor Network set voltages, Separate Enables
|
| Topology | Buck, LDO
| Buck, LDO
|
| Switching Frequency | 2000 kHz
| 2000 kHz
|
| Adj Switch Frequency | Yes
| Yes
|
| Sync Pin | Yes
| No
|
| RegType | Power Management Unit
| Power Management Unit
|
| Step-Down | Yes
| Yes
|
| Step-Up | No
| |
| Inverting | No
| No
|
| Flyback | No
| No
|
| Efficiency (peak) | 95 %
| 95 %
|
| Output Power | 1.43 Watt
| 1.43 Watt
|
| Adjustable Output | Yes
| Yes
|
| Error Flag | No
| No
|
| On/Off Pin | Yes
| Yes
|
| Multiple Output Capability | Yes
| Yes
|
| Temperature Min | -40 deg C
| -40 deg C
|
| Temperature Max | 85 deg C
| 85 deg C
|
| Automotive | Yes
| Yes
|
| PowerWise | Yes
| |
Datasheet
Featured Application Notes
More Application Notes
Part Number(s) (NSID) | Top View | Availability | Current Reported Stock | Budgetary Pricing | Standard Pack Size |
LP3906SQ-DJXI/NOPB
RoHS | | Full production Lead Time: 12 weeks
 |
| $2.20 each at 1K+ pcs | reel of 1000 |
LP3906SQ-FXPI/NOPB
RoHS | | Full production Lead Time: 6 weeks
 | Contact your distributor | $2.20 each at 1K+ pcs | reel of 1000 |
LP3906SQ-JXXI/NOPB
RoHS | | Full production Lead Time: 6 weeks
 |
| $2.20 each at 1K+ pcs | reel of 1000 |
LP3906SQ-PPXP/NOPB
RoHS | | Full production Lead Time: 12 weeks
|
| $2.20 each at 1K+ pcs | reel of 1000 |
LP3906SQ-VPFP/NOPB
RoHS | | Full production Lead Time: 12 weeks
| | Distributor | Region | Qty |
| DIGIKEY |  | Worldwide | 1377 |
| $2.20 each at 1K+ pcs | reel of 1000 |
LP3906SQX-DJXI/NOPB
RoHS | | Full production Lead Time: 12 weeks
| | Distributor | Region | Qty |
| DIGIKEY |  | Worldwide | 0 |
| $2.20 each at 1K+ pcs | reel of 4500 |
LP3906SQX-FXPI/NOPB
RoHS | | Full production Lead Time: 6 weeks
| Contact your distributor | $2.20 each at 1K+ pcs | reel of 4500 |
LP3906SQX-JXXI/NOPB
RoHS | | Full production Lead Time: 12 weeks
| | Distributor | Region | Qty |
| DIGIKEY |  | Worldwide | 0 |
| $2.20 each at 1K+ pcs | reel of 4500 |
LP3906SQX-PPXP/NOPB
RoHS | | Full production Lead Time: 12 weeks
| | Distributor | Region | Qty |
| DIGIKEY |  | Worldwide | 0 |
| $2.20 each at 1K+ pcs | reel of 4500 |
LP3906SQX-VPFP/NOPB
RoHS | | Full production Lead Time: 12 weeks
| | Distributor | Region | Qty |
| DIGIKEY |  | Worldwide | 0 |
| $2.20 each at 1K+ pcs | reel of 4500 |
Part Number(s) (NSID) | Description | Availability | Current Reported Stock | Budgetary Pricing | Standard Pack Size |
LP3906SQ-JXXIEV
| Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface | Full production
|
| $104.00 each | 1 |
| 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 12C 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.
The LP3906 Evaluation kit is based on a modular system, where the actual evaluation board is connected to the PC via a USB?I2 C interface board. The kit supports complete functional evaluation of the LP3906 circuit.
Contents:
- LP3906 evaluation board with USB interface
- USB interface cable
- CD including the following:
--Evaluation software for PC
--LP3906 datasheet
--Evaluation Manual (Application Note)
Key Specifications:
Step-Down Dc/Dc Converter (Buck)
- 1.5A output current
- Programmable VOUT from:
--Buck1: 0.8V-2.0V
--Buck2: 1.0V-3.5V
- Up to 96% efficiency
- 2MHz PWM switching frequency
- ±3% output voltage accuracy
- Automatic soft start
Linear Regulators (LDO):
- Programmable VOUT of 1.0V ? 3.5V
- ±3% output voltage accuracy
- 300mA output currents
- 25mV (typ) Dropout
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 x 4 x 0.8 mm LLP Package
- Software Programmable Regulators
Applications:
- FPGA, DSP core power
- Applications processors
- Peripheral I/O Power
|
Design Tools
Reference Design
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