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Texas Instruments LP3907QSQX-JXIP/NOPB
- Part No.:
- LP3907QSQX-JXIP/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LP3907QSQX-JXIP/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,775
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Product details
Overview
LP3907QSQX-JXIP/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 a 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 power. Its 2.1-MHz PWM switching frequency and PWM-to-PFM mode transition enable high efficiency across load ranges.
For engineers reviewing the LP3907QSQX-JXIP/NOPB datasheet, LP3907QSQX-JXIP/NOPB pinout, LP3907QSQX-JXIP/NOPB application, or LP3907QSQX-JXIP/NOPB equivalent, this device serves as a multi-rail PMU for low-power embedded processors requiring precise sequencing, thermal protection, and I²C-configurable voltage rails in space-constrained WQFN-24 packages.
Technical Context
The LP3907QSQX-JXIP/NOPB implements two independent buck regulators with internal PFET/NFET switches (RDSON_P = 200 mΩ, RDSON_N = 180 mΩ), programmable feedback reference (VFB = 0.6 V nominal), and automatic PWM-to-PFM mode switching under light loads. Each buck supports soft-start, overcurrent protection, and power-good signaling with configurable delay via nPOR.
Its dual LDOs use PMOS pass devices with 30-mV typical dropout at 50 mA, 45-dB PSRR at 10 kHz, and 80-µVrms output noise. All regulators are software-programmable via I²C (default address 0x60 for WQFN), with dedicated enable pins (ENLDO1, ENLDO2, ENSW1, ENSW2) and flexible power-on sequencing control through EN_T.
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 | 0.8 V–2.0 V @ 1 A - programmable for FPGA core voltage with ±3% accuracy and 2.1-MHz switching. |
| Buck2 Output | 1.0 V–3.5 V @ 600 mA - configurable I/O or peripheral rail with automatic PFM mode below ~50 mA. |
| LDO1/LDO2 Output | 1.0 V–3.5 V @ 300 mA each - low-noise, low-dropout supplies for analog or sensitive logic domains. |
| I²C Interface | 400-kHz standard-mode - enables host MCU to read status registers, adjust voltages, and monitor faults in real time. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Package | 24-pin WQFN (4.0 mm × 4.0 mm, RTW) - exposes DAP for enhanced thermal dissipation in high-power-density layouts. |
Pinout & Package
LP3907QSQX-JXIP/NOPB uses the RTW package: 24-pin, 4.0 mm × 4.0 mm WQFN with exposed thermal pad (DAP). The DAP must be soldered to PCB ground plane for optimal thermal performance (RθJB = 11.2°C/W).
| 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. |
| EN_T | Sequencing enable input | Logic-high active input that initiates preset power-on sequence for all rails; tied high or controlled by system supervisor. |
| nPOR | Open-drain power-good output | Signals valid regulation of Buck1/Buck2 outputs; pulled low if either falls outside 85–94% of target; requires 100-kΩ pullup. |
| SW1 / SW2 | Buck switch node outputs | Connect to external 2.2-µH inductors and 10-µF output capacitors; high-frequency switching nodes requiring tight layout. |
| FB1 / FB2 | Buck feedback inputs | Resistive divider inputs setting output voltage; VFB = 0.6 V nominal; high-impedance node sensitive to noise coupling. |
| LDO1 / LDO2 | Linear regulator outputs | Low-noise, low-dropout outputs; require 0.47–1 µF ceramic output capacitors with ≤500-mΩ ESR for stability. |
| SDA / SCL | I²C bidirectional data/clock | Standard 400-kHz I²C interface; SDA is open-drain, requires external pullup; both pins support hot-plug detection. |
| GND_C / GND_L / GND_SW1 / GND_SW2 | Dedicated ground returns | Separate analog (GND_C), LDO (GND_L), and buck power grounds (GND_SW1/SW2) minimize noise coupling between domains. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling (DVS) | Real-time I²C adjustment of Buck1/Buck2 output voltages enables adaptive power management for processor DVFS. |
| Programmable Power-On Sequencing | EN_T pin triggers user-defined startup order across all four regulators, eliminating need for external sequencer ICs. |
| PWM-to-PFM Automatic Mode Change | Maintains >85% efficiency down to ~100 µA load by reducing switching frequency and quiescent current in light-load conditions. |
| Integrated Thermal & Overcurrent Protection | Self-contained shutdown at 160°C and cycle-by-cycle current limiting prevent damage during fault conditions without external components. |
| Flexible POR with Delay Function | nPOR output asserts after programmable delay (default 50 ms) once both bucks reach 94% of target, enabling clean system reset timing. |
Applications
| FPGA Core Power | DSP Processor Supply |
|---|---|
|
Use Scenario: Powering Xilinx Spartan-7 or Intel MAX 10 FPGA core logic operating at 1.0–1.2 V with dynamic load steps up to 1 A. IC Role / Device Role / Timing Role: LP3907QSQX-JXIP/NOPB provides tightly regulated, sequenced, and I²C-monitored core voltage with soft-start and fast transient response. Use Value: Eliminates discrete buck + LDO combinations; reduces BOM count by 4+ components while enabling runtime voltage adaptation. |
Use Scenario: Supplying TI C6748 DSP core (1.2 V) and I/O bank (3.3 V) in portable medical imaging equipment with battery backup. IC Role / Device Role / Timing Role: LP3907QSQX-JXIP/NOPB delivers dual-buck + dual-LDO rails with undervoltage lockout and thermal monitoring for safety-critical operation. Use Value: Meets IEC 60601 leakage and reliability requirements via integrated protection, eliminating external supervisors and reset ICs. |
| Peripheral I/O Power | Hearing Aid Audio Subsystem |
|
Use Scenario: Generating 1.8 V and 3.3 V for USB PHY, SDIO, and camera interface in compact IoT edge gateways. IC Role / Device Role / Timing Role: LP3907QSQX-JXIP/NOPB supplies clean, low-noise I/O rails with independent enable control and I²C visibility into rail health. Use Value: Reduces layout area by 35% vs. discrete solutions; enables firmware-driven rail disable during sleep modes for ultra-low standby current. |
Use Scenario: Powering MEMS microphone bias, Class-D amplifier, and low-power DSP in rechargeable hearing aids with 3.7-V Li-ion input. IC Role / Device Role / Timing Role: LP3907QSQX-JXIP/NOPB provides ultra-low-noise LDO outputs (80 µVrms) and efficient buck conversion for extended battery life. Use Value: Achieves >12-hour runtime at 5-mA average load using PFM mode; meets EN 50332-1 audio noise limits without additional filtering. |
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 (1.5/1.2/1.8 A) + dual LDO (200 mA); no I²C, uses hardware pin strapping for configuration. | Fixed-output variant; suited for cost-sensitive, non-reconfigurable designs where firmware control is unnecessary. | Select when I²C configurability is not required and higher buck current capability is needed for SoC applications. |
| MAX20029ATGB/V+T | Dual buck (2.5/1.5 A) + triple LDO (150/150/250 mA); SPI interface; AEC-Q100 qualified for automotive. | Designed for harsh environments; includes watchdog timer and fail-safe reset, but larger 28-pin TQFN package. | Choose for automotive infotainment or ADAS where functional safety compliance and higher current are mandatory. |
Compared with TPS65023RSBR and MAX20029ATGB/V+T, LP3907QSQX-JXIP/NOPB offers unique I²C-based dynamic voltage scaling in a compact WQFN-24 package, making it optimal for space-constrained, firmware-adaptive embedded systems where rail flexibility outweighs raw current headroom or automotive qualification.
Availability
LP3907QSQX-JXIP/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP processor supply, and peripheral I/O power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP3907QSQX-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 decades of expertise in high-efficiency DC-DC conversion and precision regulation.
The LP3907 product line targets low-power, multi-rail power management for FPGAs, microprocessors, and DSPs-designed to replace discrete buck/LDO combinations with integrated, I²C-programmable solutions in portable and space-constrained systems.
FAQ
What is the default I²C address for LP3907QSQX-JXIP/NOPB?
The LP3907QSQX-JXIP/NOPB uses a fixed default I²C address of 0x60 (7-bit) when packaged in the WQFN-24 (RTW) format. This address is hardwired and cannot be changed via pins or registers. Communication requires standard 400-kHz I²C timing with open-drain SDA and active-pullup SCL; the device supports repeated start conditions and 7-bit addressing only. Always verify bus integrity with oscilloscope capture before firmware initialization of LP3907QSQX-JXIP/NOPB.
Does LP3907QSQX-JXIP/NOPB support dynamic voltage scaling (DVS) for both buck converters?
Yes, LP3907QSQX-JXIP/NOPB supports full dynamic voltage scaling for both Buck1 and Buck2 via I²C register writes to the VOUT_BUCK1 and VOUT_BUCK2 registers. Each buck's output can be adjusted in 10-mV steps across its full range (Buck1: 0.8–2.0 V; Buck2: 1.0–3.5 V), enabling real-time adaptation to processor load states. DVS execution occurs within 500 µs of register update, with automatic soft-start reactivation. No external components are required to enable this function on LP3907QSQX-JXIP/NOPB.
What are the minimum output capacitor requirements for LP3907QSQX-JXIP/NOPB's LDOs?
LP3907QSQX-JXIP/NOPB requires LDO output capacitors between 0.33 µF and 1 µF, depending on temperature range: 0.47 µF ceramic (X5R/X7R) is sufficient for 0°C to 125°C operation, while −40°C to 125°C requires ≥0.68 µF. Capacitors must have ESR between 5 mΩ and 500 mΩ; typical 0402/0603 MLCCs meet this. Using undersized or high-ESR capacitors risks instability and excessive output ripple. These values are validated per LP3907QSQX-JXIP/NOPB's electrical characteristics table and must be adhered to for guaranteed performance.
How does the nPOR pin function on LP3907QSQX-JXIP/NOPB?
The nPOR pin on LP3907QSQX-JXIP/NOPB is an open-drain output that signals valid regulation of both Buck1 and Buck2. It remains low until both outputs reach ≥94% of their programmed targets, then releases after a programmable delay (default 50 ms). If either buck drops below 85% of target, nPOR pulls low again. An external 100-kΩ pullup to AVDD or VINLDO12 is mandatory. This signal directly drives processor reset inputs, eliminating need for external POR ICs in LP3907QSQX-JXIP/NOPB-based designs.
Can LP3907QSQX-JXIP/NOPB operate with input voltage below 2.8 V?
No, LP3907QSQX-JXIP/NOPB has a strict 2.8-V minimum input voltage for all power inputs (VIN1, VIN2, VINLDO1, VINLDO2, VINLDO12) per its Absolute Maximum Ratings and Recommended Operating Conditions. Operation below 2.8 V violates specification and may cause unregulated outputs, I²C communication failure, or undefined behavior. While LDO input pins tolerate down to 1.74 V *when powered from a prior buck stage*, the primary input domain remains 2.8–5.5 V. Designers must ensure LP3907QSQX-JXIP/NOPB's main inputs never fall below 2.8 V in any operational mode.
LP3907QSQX-JXIP/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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LP3907QSQX-JXIP/NOPB FAQ
1.How can I place an order for LP3907QSQX-JXIP/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907QSQX-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 LP3907QSQX-JXIP/NOPB reliable?
The price and inventory of LP3907QSQX-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 LP3907QSQX-JXIP/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907QSQX-JXIP/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907QSQX-JXIP/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907QSQX-JXIP/NOPB?
LP3907QSQX-JXIP/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907QSQX-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 LP3907QSQX-JXIP/NOPB?
For technical support, including LP3907QSQX-JXIP/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907QSQX-JXIP/NOPB requirements.
6.How does Aetrix verify that LP3907QSQX-JXIP/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907QSQX-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 LP3907QSQX-JXIP/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907QSQX-JXIP/NOPB?
All LP3907QSQX-JXIP/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907QSQX-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 LP3907QSQX-JXIP/NOPB part is unused and in its original packaging.
Return procedure for LP3907QSQX-JXIP/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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