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Texas Instruments LP3907QSQ-JXIP/NOPB
- Part No.:
- LP3907QSQ-JXIP/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LP3907QSQ-JXIP/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
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Product details
Overview
LP3907QSQ-JXIP/NOPB from Texas Instruments is a programmable power management IC (PMU) integrating two synchronous buck converters (1 A and 600 mA), two 300-mA LDOs, and an I²C interface for dynamic voltage scaling and sequencing control in low-power FPGAs and DSPs. It operates from 2.8 V to 5.5 V input, delivers ±3% output accuracy, supports 2.1-MHz PWM switching with automatic PWM-to-PFM transition, and features thermal/overcurrent protection.
For engineers reviewing the LP3907QSQ-JXIP/NOPB datasheet, LP3907QSQ-JXIP/NOPB pinout, LP3907QSQ-JXIP/NOPB application, or LP3907QSQ-JXIP/NOPB equivalent, this device is selected for FPGA core/I/O rail consolidation, battery-powered portable instrumentation requiring precise sequencing, and systems needing software-configurable multi-rail power with minimal external components.
Technical Context
The LP3907QSQ-JXIP/NOPB implements dual independent buck regulators with synchronous rectification, programmable output voltages (Buck1: 0.8–2 V; Buck2: 1–3.5 V), and integrated feedback resistors. Its LDOs use PMOS pass devices with 30-mV typical dropout and support 1–3.5 V outputs. All rails are controlled via a 400-kHz I²C interface with configurable power-on reset delay and undervoltage lockout.
It features dynamic voltage scaling (DVS) for processor core rails, automatic soft-start per regulator, and flexible enable sequencing via EN_T, ENSW1/2, and ENLDO1/2 pins. The device includes internal precision reference, thermal shutdown at 160°C, and overcurrent protection on both bucks and LDOs - all within a single WQFN-24 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports single-cell Li-ion, USB, or regulated 3.3/5-V supplies without external pre-regulation. |
| Buck1 Output | 0.8 V–2 V at 1 A - programmable core voltage for FPGA/DSP logic with ±3% accuracy and 2.1-MHz switching. |
| Buck2 Output | 1 V–3.5 V at 600 mA - configurable I/O or peripheral rail with automatic PWM-to-PFM mode for light-load efficiency. |
| LDO1/LDO2 Output | 1 V–3.5 V at 300 mA each - low-noise (80 µVrms), low-dropout (30 mV typ.) rails for analog or sensitive digital circuitry. |
| I²C Interface | 400-kHz standard-mode - enables host-controlled configuration of all regulators, sequencing, and status monitoring. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Package | WQFN-24 (4.0 mm × 4.0 mm) - thermally enhanced exposed pad for high-power-density layouts in space-constrained applications. |
Pinout & Package
The LP3907QSQ-JXIP/NOPB is housed in a 24-pin WQFN package (RTW) with 4.0 mm × 4.0 mm body and thermally enhanced DAP (die attach pad) for improved heat dissipation. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINLDO12 | Analog power supply | Provides 2.8–5.5 V bias for internal reference, I²C logic, and control circuitry - must be decoupled with 1 µF ceramic capacitor. |
| EN_T | Sequencing enable input | Logic-level input that initiates preset power-on sequence for all regulators; pulled high internally when not used. |
| nPOR | Open-drain power-good output | Signals valid regulation of Buck1/Buck2 outputs with 50-ms default delay; requires external 100-kΩ pullup for proper logic level. |
| GND_SW1 / GND_SW2 | Power ground terminals | Dedicated low-impedance return paths for Buck1/Buck2 switch-node currents - must connect separately to PCB ground plane under DAP. |
| SW1 / SW2 | Switch-node outputs | Connect to external inductors (2.2 µH) and output capacitors (10 µF); require tight layout to minimize EMI and switching losses. |
| FB1 / FB2 | Feedback inputs | Monitor regulated output voltage; internal resistor divider sets default VOUT - external resistors allow full programmability. |
| SDA / SCL | I²C bidirectional data/clock | Enable register access for real-time configuration of VOUT, sequencing order, DVS steps, and fault reporting. |
| ENSW1 / ENSW2 / ENLDO1 / ENLDO2 | Individual regulator enables | Independent logic-level controls for each buck and LDO - permit fine-grained power gating and dynamic rail management. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling (DVS) | Software-adjustable output voltages on Buck1/Buck2 enable runtime optimization of FPGA/DSP core power vs. performance. |
| Programmable Power-On Sequencing | Configurable startup order and delays via EN_T and I²C registers ensure safe initialization of multi-rail processors and FPGAs. |
| Synchronous Buck Architecture | Integrated high-side/low-side MOSFETs (200 mΩ PFET / 180 mΩ NFET) eliminate external diodes and maximize efficiency up to 96%. |
| Low-Noise LDOs | 80 µVrms output noise and 45 dB PSRR at 10 kHz support clean analog supplies for ADCs, sensors, or RF front-ends. |
| Flexible POR with Delay | Adjustable nPOR assertion timing ensures system reset occurs only after all critical rails meet regulation tolerance (±6% window). |
Applications
| FPGA Core & I/O Power | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Powering Xilinx Spartan or Intel Cyclone FPGA with separate 1.2-V core and 3.3-V I/O rails from a single Li-ion cell. IC Role / Device Role / Timing Role: LP3907QSQ-JXIP/NOPB acts as primary PMU, delivering tightly regulated, sequenced, and dynamically scalable voltages while managing thermal limits during burst-mode operation. Use Value: Eliminates need for discrete DC-DC + LDO combinations, reduces BOM count by ≥4 components, and enables firmware-controlled voltage margining for reliability testing. |
Use Scenario: Battery-powered hearing aid with ultra-low quiescent current requirements and strict EMI limits. IC Role / Device Role / Timing Role: LP3907QSQ-JXIP/NOPB supplies 1.8-V DSP core, 3.3-V audio codec, and 2.5-V sensor interface with sub-µA shutdown current and PFM-mode efficiency at 10-µA loads. Use Value: Extends battery life beyond 120 hours per charge via adaptive switching mode and <0.03-µA LDO shutdown current. |
| Electronic Measurement Units | Equipment Run-Off from Battery Backup |
|
Use Scenario: Handheld multimeter requiring stable 3.3-V analog front-end and 1.2-V microcontroller supply during AC mains interruption. IC Role / Device Role / Timing Role: LP3907QSQ-JXIP/NOPB provides fast transient response (<10 µs) on both bucks and LDOs to maintain regulation during sudden load steps from ADC sampling bursts. Use Value: Achieves <±0.5% output deviation under 100-mA step load, ensuring measurement accuracy unaffected by supply ripple or sag. |
Use Scenario: Industrial PLC module maintaining communication and memory retention during brief AC failure using supercapacitor backup. IC Role / Device Role / Timing Role: LP3907QSQ-JXIP/NOPB manages seamless switchover between main 5-V supply and 3.6-V backup, with UVLO monitoring and controlled brownout sequencing. Use Value: Guarantees uninterrupted operation for ≥200 ms via programmable UVLO threshold (2.7–2.9 V) and coordinated rail shutdown/restart. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple buck (2×1.5 A, 1×1 A) + dual LDO (2×200 mA); no I²C, uses hardware straps for configuration. | Fixed-output variant suited for cost-sensitive, non-dynamic applications where firmware control is unnecessary. | Select when deterministic, strap-based power-up behavior is preferred over programmability and DVS capability. |
| MAX20029ATPA/V+T | Dual buck (2×2 A) + triple LDO (3×300 mA); SPI interface; automotive AEC-Q100 qualified; higher VIN max (28 V). | Designed for automotive infotainment and ADAS modules requiring extended temperature range and fault diagnostics. | Select for automotive-grade designs needing watchdog, fault logging, and 12-V input compatibility - not drop-in compatible. |
Compared with TPS65023RSBR and MAX20029ATPA/V+T, the LP3907QSQ-JXIP/NOPB uniquely balances I²C configurability, compact WQFN-24 footprint, and optimized efficiency for portable low-power FPGAs - offering firmware-driven DVS and sequencing unattainable with strap-only or SPI-only alternatives.
Availability
LP3907QSQ-JXIP/NOPB is available at Aetrix Electronics and suitable for FPGA core power, portable medical instrumentation, and electronic measurement units requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LP3907QSQ-JXIP/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in high-reliability power solutions.
The LP3907 product line was engineered specifically for low-power, multi-rail applications in FPGAs, DSPs, and portable instrumentation - emphasizing integration, software configurability, and thermal robustness in minimal footprint.
FAQ
What is the default output voltage configuration for LP3907QSQ-JXIP/NOPB?
The LP3907QSQ-JXIP/NOPB is factory-programmed with Buck1 = 1.2 V, Buck2 = 3.3 V, LDO1 = 1.8 V, and LDO2 = 2.5 V. These defaults are set via internal one-time-programmable (OTP) memory and can be modified in real time using the I²C interface. The LP3907QSQ-JXIP/NOPB retains custom settings across power cycles when configured via I²C write to volatile registers.
Does LP3907QSQ-JXIP/NOPB support dynamic voltage scaling (DVS) for both buck converters?
Yes, the LP3907QSQ-JXIP/NOPB supports independent DVS on Buck1 and Buck2 via I²C register writes. Each buck's output voltage can be adjusted in 10-mV steps across its full range (Buck1: 0.8–2 V; Buck2: 1–3.5 V), enabling real-time adaptation to processor workload changes. This functionality is implemented in hardware and does not require external DACs or feedback resistor networks.
What thermal management provisions does LP3907QSQ-JXIP/NOPB include?
The LP3907QSQ-JXIP/NOPB integrates thermal shutdown at 160°C (typical) with 20°C hysteresis, junction-to-board thermal resistance of 11.2°C/W (WQFN), and an exposed DAP for solder attachment to inner ground planes. Its RθJA is 32.7°C/W under JEDEC-standard conditions, and thermal derating guidance is provided in Section 7.4 of the datasheet for high-power applications.
Can LP3907QSQ-JXIP/NOPB operate with input voltages below 2.8 V?
No - the absolute minimum input voltage for reliable operation of LP3907QSQ-JXIP/NOPB is 2.8 V, as specified in Recommended Operating Conditions. While LDO1/LDO2 inputs (Pins 19 and 24) tolerate down to 1.74 V when powered from a pre-regulated source, the main VINLDO12, AVDD, and buck inputs require ≥2.8 V to maintain regulation, sequencing integrity, and I²C functionality.
How is power-on reset (nPOR) configured on LP3907QSQ-JXIP/NOPB?
The nPOR pin on LP3907QSQ-JXIP/NOPB is an open-drain output asserting low until both Buck1 and Buck2 reach ≥94% of target voltage, then releasing after a user-programmable delay (default 50 ms). Its threshold and delay are configurable via I²C registers, and it monitors regulation independently of input UVLO, providing system-level reset signaling directly tied to output rail stability.
LP3907QSQ-JXIP/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (2), Linear (LDO) (2)
- Number of Outputs:
- 4
- Frequency - Switching:
- 2.1MHz
- Voltage/Current - Output 1:
- 1.2V, 1A
- Voltage/Current - Output 2:
- 3.3V, 600mA
- Voltage/Current - Output 3:
- 1.8V, 300mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 2.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LP3907QSQ-JXIP/NOPB FAQ
1.How can I place an order for LP3907QSQ-JXIP/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907QSQ-JXIP/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LP3907QSQ-JXIP/NOPB reliable?
The price and inventory of LP3907QSQ-JXIP/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3907QSQ-JXIP/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907QSQ-JXIP/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907QSQ-JXIP/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907QSQ-JXIP/NOPB?
LP3907QSQ-JXIP/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907QSQ-JXIP/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LP3907QSQ-JXIP/NOPB?
For technical support, including LP3907QSQ-JXIP/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907QSQ-JXIP/NOPB requirements.
6.How does Aetrix verify that LP3907QSQ-JXIP/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907QSQ-JXIP/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LP3907QSQ-JXIP/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907QSQ-JXIP/NOPB?
All LP3907QSQ-JXIP/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907QSQ-JXIP/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LP3907QSQ-JXIP/NOPB part is unused and in its original packaging.
Return procedure for LP3907QSQ-JXIP/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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