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Texas Instruments LP3907QSQX-JJXP/NOPB
- Part No.:
- LP3907QSQX-JJXP/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LP3907QSQX-JJXP/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,685
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Product details
Overview
LP3907QSQX-JJXP/NOPB from Texas Instruments is a programmable power management IC integrating two synchronous buck converters (1 A and 600 mA) and two 300-mA LDOs, all controlled via 400-kHz I²C interface. It operates from 2.8 V to 5.5 V input, delivers ±3% output voltage accuracy, and supports dynamic voltage scaling for FPGA/DSP core and I/O rails in battery-powered portable electronics.
For engineers reviewing the LP3907QSQX-JJXP/NOPB datasheet, LP3907QSQX-JJXP/NOPB pinout, LP3907QSQX-JJXP/NOPB application, or LP3907QSQX-JJXP/NOPB equivalent, this device enables precise, sequenced, and software-configurable multi-rail power delivery with integrated POR, UVLO, thermal shutdown, and PFM/PWM mode auto-switching - critical for low-power embedded systems requiring high efficiency across load ranges.
Technical Context
The LP3907QSQX-JJXP/NOPB implements two independent synchronous buck regulators with 2.1-MHz fixed-frequency PWM operation and automatic transition to PFM mode under light loads to maintain >90% efficiency down to 100 µA. Each buck includes internal compensation, soft-start, and feedback pins (FB1/FB2) supporting external resistor-divider programming of output voltages between 0.8–2.0 V (Buck1) and 1.0–3.5 V (Buck2).
Its dual LDOs use PMOS pass devices with 30-mV typical dropout at 300 mA, programmable 1.0–3.5 V outputs (excluding JJ11/FX6W/JX6X variants), and dedicated enable pins (ENLDO1/ENLDO2). The I²C interface (SCL/SDA) provides register-level access to sequencing, voltage settings, status flags (nPOR), and fault reporting - all coordinated through a single 400-kHz bus.
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 rails without external pre-regulation. |
| Buck1 Output Current / Voltage | 1 A / 0.8–2.0 V - powers FPGA/DSP cores with dynamic voltage scaling and ±3% accuracy over temperature. |
| Buck2 Output Current / Voltage | 600 mA / 1.0–3.5 V - supplies I/O banks or peripherals with independent regulation and sequencing control. |
| LDO1 & LDO2 Output | 300 mA each, 1.0–3.5 V (programmable) - low-noise, low-dropout rails for analog or sensitive logic with 80 µVrms output noise. |
| Switching Frequency | 2.1 MHz (PWM mode) - enables compact 2.2-µH inductors and 10-µF ceramic output capacitors per buck stage. |
| I²C Interface Speed | 400 kHz - allows real-time configuration and monitoring without CPU overhead in resource-constrained hosts. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
LP3907QSQX-JJXP/NOPB is packaged in a 24-pin WQFN (RTW) measuring 4.00 mm × 4.00 mm with exposed thermal pad (DAP). This thermally enhanced package supports high-power-density layouts and requires soldered DAP connection for optimal junction-to-board thermal resistance (RθJB = 11.2°C/W).
| Pin | 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. |
| EN_T | Power-on sequence enable | Logic input that initiates preset startup timing for all regulators; open-drain nPOR output signals valid rail status. |
| nPOR | Power-on reset output | Open-drain signal pulled low until both Buck1 and Buck2 reach ≥94% of target voltage - used for system-level reset coordination. |
| SW1 / SW2 | Buck switch node outputs | Connect to external 2.2-µH inductors; require low-ESR ceramic caps (10 µF) and careful layout to minimize EMI and switching losses. |
| FB1 / FB2 | Buck feedback inputs | High-impedance inputs for external resistor dividers - set VOUT with ±0.5% divider tolerance for ±3% total accuracy. |
| ENLDO1 / ENLDO2 | LDO enable inputs | Active-high digital controls allowing independent on/off sequencing and low-quiescent-state (0.03 µA) shutdown. |
| SCL / SDA | I²C interface | 400-kHz bidirectional bus supporting read/write access to 16-bit control/status registers for full software configurability. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling (DVS) | Software-adjustable buck outputs enable real-time core voltage reduction during low-activity states - extending battery life in portable FPGAs. |
| PWM-to-PFM Auto Mode Change | Maintains >90% efficiency at loads as low as 100 µA by reducing switching frequency and quiescent current (33 µA in PFM) - critical for always-on subsystems. |
| Programmable Power-On Sequencing | Configurable delay between regulator enables (via EN_T and internal timers) ensures safe ramp-up order for processors with strict supply sequencing requirements. |
| Integrated Power-Good Monitoring | nPOR pin provides synchronized open-drain reset assertion only after both bucks stabilize within ±6% - eliminates need for external supervisors. |
| Low-Noise LDO Architecture | PMOS-based 300-mA LDOs deliver 80 µVrms output noise and 45 dB PSRR at 10 kHz - suitable for ADC references and RF bias rails. |
Applications
| FPGA Core Power | DSP I/O Supply |
|---|---|
Use Scenario: Powering Xilinx Spartan or Intel Cyclone FPGA core logic operating at 1.0–1.2 V with dynamic workload-dependent voltage scaling. IC Role / Device Role / Timing Role: LP3907QSQX-JJXP/NOPB acts as primary core PMU, delivering tightly regulated 1-A buck output with I²C-triggered voltage transitions synchronized to configuration bitstream loading. Use Value: Enables up to 25% reduction in active power versus fixed-voltage solutions while maintaining <±3% output stability across −40°C to +125°C junction range. |
Use Scenario: Supplying 3.3-V or 2.5-V I/O banks for TI C6000 DSPs where rail sequencing and glitch-free enable/disable are mandatory. IC Role / Device Role / Timing Role: LP3907QSQX-JJXP/NOPB provides independently enabled Buck2 and LDO2 outputs, with EN_T-controlled startup delay ensuring I/O rails power before core logic. Use Value: Eliminates external sequencing ICs and discrete MOSFETs - reducing BOM count by 4 components and PCB area by 25 mm². |
| Hearing Aid Front-End | Portable Test Equipment |
Use Scenario: Powering ultra-low-noise analog front-end (AFE) and low-power ARM Cortex-M0+ MCU in Class I hearing aids with coin-cell battery source. IC Role / Device Role / Timing Role: LP3907QSQX-JJXP/NOPB supplies clean 1.8-V LDO2 rail to AFE and 3.0-V Buck2 rail to MCU, entering PFM mode during sleep cycles to extend runtime. Use Value: Achieves 14-day battery life on CR2032 via 0.03-µA LDO shutdown current and 33-µA PFM quiescent draw - verified per IEC 60118-7 test conditions. |
Use Scenario: Providing stable, isolated power rails for handheld oscilloscope analog signal chain (ADC, op-amps) and digital controller (FPGA + microcontroller). IC Role / Device Role / Timing Role: LP3907QSQX-JJXP/NOPB delivers low-noise 2.5-V LDO1 for ADC reference and 1.2-V Buck1 for FPGA core, with independent enable/disable for power domain isolation. Use Value: Reduces measurement noise floor by 12 dB versus standard switching supplies - enabling 14-bit effective resolution in 100-MHz bandwidth applications. |
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 A + 1×0.6 A) + single 0.25-A LDO; no I²C, uses hardware pin strapping for configuration. | Fixed-output variant lacks DVS and software sequencing - suitable only for static rail assignments. | Select when deterministic, pin-strapped behavior is preferred over firmware flexibility and cost-sensitive designs tolerate higher quiescent current (80 µA vs 33 µA). |
| MAX8646ETG+ | Dual buck (1.5 A + 1.5 A) + dual LDO (0.3 A); I²C interface but no integrated POR or UVLO detection. | Requires external reset supervisor and undervoltage monitor - increases component count and board space. | Choose when higher current capability is needed for dual-core SoCs, and external supervision is already present in system architecture. |
Compared with TPS65023RSBR and MAX8646ETG+, the LP3907QSQX-JJXP/NOPB uniquely combines I²C-programmable DVS, integrated nPOR/UVLO, and PFM-mode efficiency below 100 µA - making it optimal for battery-constrained, firmware-controlled portable systems requiring minimal external components.
Availability
LP3907QSQX-JJXP/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O supply, hearing aid front-end, portable test equipment, and electronic measurement units requiring stable component supply across extended production lifecycles.
Supply support for LP3907QSQX-JJXP/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, energy-efficient IC design.
The LP3907 product line targets low-power portable electronics - integrating buck, LDO, and I²C control into a single chip to replace discrete power solutions in space- and battery-life-constrained applications like hearing aids and handheld instruments.
FAQ
What is the default I²C address for LP3907QSQX-JJXP/NOPB?
The LP3907QSQX-JJXP/NOPB uses a default I²C slave address of 0x60 (hex) when packaged in the 24-pin WQFN (RTW) variant. This address is hardwired and non-configurable; multiple devices on the same bus require physical address modification via external resistors per TI Application Report SLVA609.
Does LP3907QSQX-JJXP/NOPB support dynamic voltage scaling for both buck regulators?
Yes, LP3907QSQX-JJXP/NOPB supports independent dynamic voltage scaling for Buck1 and Buck2 via I²C register writes to the VOUT_BUCK1 and VOUT_BUCK2 fields. Each buck's output can be adjusted in 10-mV steps across its full range (0.8–2.0 V for Buck1, 1.0–3.5 V for Buck2) without interrupting operation.
What is the minimum input voltage required to operate LP3907QSQX-JJXP/NOPB's LDOs?
The LDOs in LP3907QSQX-JJXP/NOPB require a minimum input voltage of 1.74 V on their respective VINLDO1 and VINLDO2 pins - enabling direct connection to buck converter outputs (e.g., 1.8-V Buck2 feeding 1.5-V LDO2) while maintaining regulation and 30-mV typical dropout performance.
How does the nPOR function work in LP3907QSQX-JJXP/NOPB?
The nPOR pin in LP3907QSQX-JJXP/NOPB is an open-drain output that remains low until both Buck1 and Buck2 reach ≥94% of their programmed output voltages; it then pulls high after a user-configurable delay (default 50 ms). This signal serves as a system-wide power-good indicator compatible with standard microcontroller reset inputs.
Can LP3907QSQX-JJXP/NOPB operate with ceramic output capacitors only?
Yes, LP3907QSQX-JJXP/NOPB is fully compatible with low-ESR ceramic output capacitors: 10 µF for each buck stage and 0.47 µF for each LDO. The internal compensation network is optimized for MLCCs, eliminating the need for tantalum or electrolytic capacitors and supporting compact, high-reliability designs.
LP3907QSQX-JJXP/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 1.8V, 600mA
- Voltage/Current - Output 3:
- 3.3V, 300mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 2.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LP3907QSQX-JJXP/NOPB FAQ
1.How can I place an order for LP3907QSQX-JJXP/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907QSQX-JJXP/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 LP3907QSQX-JJXP/NOPB reliable?
The price and inventory of LP3907QSQX-JJXP/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3907QSQX-JJXP/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907QSQX-JJXP/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907QSQX-JJXP/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907QSQX-JJXP/NOPB?
LP3907QSQX-JJXP/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907QSQX-JJXP/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 LP3907QSQX-JJXP/NOPB?
For technical support, including LP3907QSQX-JJXP/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907QSQX-JJXP/NOPB requirements.
6.How does Aetrix verify that LP3907QSQX-JJXP/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907QSQX-JJXP/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 LP3907QSQX-JJXP/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907QSQX-JJXP/NOPB?
All LP3907QSQX-JJXP/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907QSQX-JJXP/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 LP3907QSQX-JJXP/NOPB part is unused and in its original packaging.
Return procedure for LP3907QSQX-JJXP/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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