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Texas Instruments LP3907SQX-JXQX/NOPB
- Part No.:
- LP3907SQX-JXQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LP3907SQX-JXQX/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,779
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Product details
Overview
LP3907SQX-JXQX/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, supports auto-mode PWM-to-PFM switching, and targets FPGA/DSP core and I/O rail sequencing in battery-powered portable electronics.
For engineers reviewing the LP3907SQX-JXQX/NOPB datasheet, LP3907SQX-JXQX/NOPB pinout, LP3907SQX-JXQX/NOPB application, or LP3907SQX-JXQX/NOPB equivalent, this device enables precise dynamic voltage scaling, flexible power-on reset with delay, thermal/overcurrent protection, and low-noise analog supply generation for mixed-signal SoC subsystems.
Technical Context
The LP3907SQX-JXQX/NOPB implements dual independent buck regulators with 2.1-MHz fixed-frequency PWM operation and automatic transition to PFM mode under light load to sustain >90% efficiency down to 100 µA. Its LDOs use PMOS pass devices with 30-mV typical dropout at 50 mA and 45-dB PSRR at 10 kHz.
I²C communication operates at 400 kHz with dedicated SDA/SCL pins, supporting register-level control of output voltages (Buck1: 0.8–2 V; Buck2: 1–3.5 V; LDO1/LDO2: 1–3.5 V), enable states, sequencing delays, and POR thresholds. The device features integrated nPOR open-drain output with 50-ms default delay and 94%/85% rising/falling voltage detection windows.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports single-cell Li-ion, USB, and regulated intermediate rails without external pre-regulation. |
| Buck1 Output | 1.2 V @ 1 A - factory-default setting per J-column Table 3; programmable from 0.8 V to 2 V with ±3% accuracy. |
| Buck2 Output | 3.3 V @ 600 mA - factory-default setting per J-column Table 3; programmable from 1 V to 3.5 V with ±3% accuracy. |
| LDO1 Output | 2.6 V @ 300 mA - factory-default setting per J-column Table 3; 30-mV typical dropout enables high-efficiency low-voltage biasing. |
| LDO2 Output | 3.3 V @ 300 mA - factory-default setting per J-column Table 3; supports I/O rail regulation with 80 µVrms output noise. |
| Switching Frequency | 2.1 MHz - enables use of compact 2.2-µH inductors and 10-µF ceramic output capacitors for space-constrained layouts. |
| I²C Interface | 400 kHz standard-mode - allows host processor to configure all regulators, monitor status flags, and adjust sequencing timing. |
Pinout & Package
LP3907SQX-JXQX/NOPB is packaged in a 24-pin WQFN (RTW) with 4.00 mm × 4.00 mm body and exposed thermal pad (DAP). The package supports high-power dissipation (RθJA = 32.7°C/W) and requires PCB thermal vias under the DAP for optimal junction temperature control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Buck1 input power | Accepts 2.8–5.5 V; minimum input must exceed Buck1 VOUT by ≥1 V for regulation. |
| SW1 | Buck1 switch node | Connects to external 2.2-µH inductor and 10-µF output capacitor; high dv/dt node requiring tight layout. |
| FB1 | Buck1 feedback input | Resistor-divider input setting VOUT; internal reference = 0.6 V; supports programmable output via I²C. |
| ENSW1 | Buck1 enable control | Active-high digital input; overrides I²C control when asserted; logic threshold: VIH ≥1.2 V, VIL ≤0.4 V. |
| VIN2 | Buck2 input power | Independent input rail; supports separate battery or DC source for isolated power domains. |
| SW2 | Buck2 switch node | Connects to second 2.2-µH inductor and 10-µF output capacitor; electrically isolated from SW1. |
| FB2 | Buck2 feedback input | Resistor-divider input; identical 0.6-V reference and I²C programmability as FB1. |
| ENSW2 | Buck2 enable control | Active-high digital enable; independent of ENSW1 for asymmetric sequencing control. |
| VINLDO1 | LDO1 input power | Accepts 1.74–5.5 V; enables LDO operation from buck outputs or low-voltage sources. |
| LDO1 | LDO1 regulated output | Delivers 2.6 V @ 300 mA; 30-mV dropout allows 2.63-V minimum input at full load. |
| ENLDO1 | LDO1 enable control | Active-high logic input; enables/disables LDO1 independently of I²C or other regulators. |
| VINLDO2 | LDO2 input power | Separate input for LDO2; supports different source than VINLDO1 for noise isolation. |
| LDO2 | LDO2 regulated output | Delivers 3.3 V @ 300 mA; 80 µVrms output noise suitable for analog/RF circuitry. |
| ENLDO2 | LDO2 enable control | Active-high enable; supports staggered power-up of LDO rails relative to bucks. |
| SCL / SDA | I²C clock/data | 400-kHz bidirectional interface; supports multi-device addressing (default address 0x3C for WQFN). |
| nPOR | Power-on reset output | Open-drain signal pulled low until both Buck1 and Buck2 reach 94% of target; 50-ms default delay. |
| GND_SW1 / GND_SW2 | Switch ground returns | Dedicated low-impedance ground paths for buck NMOS FETs; must be routed separately from analog ground. |
| GND_L / GND_C | LDO and core grounds | Isolated ground pins minimize noise coupling between LDO outputs and internal analog blocks. |
| VINLDO12 / AVDD | Analog power supplies | Provide clean 2.8–5.5 V bias to internal reference, I²C buffers, and control logic; decoupling required. |
| DAP | Thermal pad | Internally connected to GND; requires ≥6 thermal vias to inner ground plane for RθJB = 11.2°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage scaling (DVS) | Independent I²C-programmable output voltages for each buck and LDO enable real-time SoC performance/power tuning. |
| Auto-mode PWM-to-PFM transition | Maintains >90% efficiency at loads as low as 100 µA without manual mode switching or external control logic. |
| Flexible power-on sequencing | Configurable enable delays (001/010/100 codes) and nPOR assertion timing support custom startup order across 4 rails. |
| Integrated protection suite | Includes thermal shutdown (160°C), overcurrent limiting (1.5 A Buck1 / 1 A Buck2), UVLO (2.7–2.9 V), and short-circuit current limit (500 mA per LDO). |
| Low-noise analog supply | AVDD and VINLDO12 inputs power internal 0.6-V reference and I²C interface with <80 µVrms output noise on LDO2. |
Applications
| FPGA Core Power | DSP I/O Supply |
|---|---|
|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core logic operating at 1.2 V with dynamic DVFS demands. IC Role / Device Role / Timing Role: LP3907SQX-JXQX/NOPB Buck1 delivers 1.2 V @ 1 A with I²C-adjustable voltage during frequency scaling events. Use Value: Enables real-time voltage reduction during low-activity periods, cutting dynamic power by up to 44% (P ∝ V²) without compromising timing margins. |
Use Scenario: Supplying 3.3-V I/O banks for TI C6748 DSP interfacing with ADCs, DACs, and memory peripherals. IC Role / Device Role / Timing Role: LP3907SQX-JXQX/NOPB LDO2 provides low-noise 3.3 V with 45-dB PSRR at 10 kHz to suppress switching noise from adjacent bucks. Use Value: Maintains <80 µVrms output noise and <0.15%/V line regulation, preventing spurious tones in 16-bit audio signal chains. |
| Hearing Aid Front-End | Battery-Backed Measurement Unit |
|
Use Scenario: Powering ultra-low-power analog front-end (AFE) and ARM Cortex-M0+ MCU in Class-D hearing aids. IC Role / Device Role / Timing Role: LP3907SQX-JXQX/NOPB Buck2 supplies 3.3 V @ 600 mA to RF transceiver and sensor interface; LDO1 powers 2.6-V AFE bias rails. Use Value: Auto-mode operation sustains >85% efficiency at 50–200 µA sleep currents, extending coin-cell life beyond 14 days per charge. |
Use Scenario: Providing stable 1.2-V and 3.3-V rails for portable gas chromatography sensors operating from Li-SOCl₂ primary cells. IC Role / Device Role / Timing Role: LP3907SQX-JXQX/NOPB uses UVLO (2.7 V) and nPOR to hold system in reset until battery reaches safe operating voltage post cold-start. Use Value: Prevents brownout-induced data corruption during 10–30-second battery stabilization phase after deep discharge recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple buck + dual LDO; 2.5–5.5 V input; no I²C; fixed 1.2/1.8/2.85 V outputs; 3-MHz switching. | Fixed-output, non-programmable architecture; suited for cost-sensitive designs where voltage flexibility is unnecessary. | Select when deterministic startup timing and minimal firmware overhead outweigh need for DVS or custom sequencing. |
| LP87332D0RGER | Dual buck + dual LDO; 2.5–5.5 V input; I²C interface; 1.8/3.3 V defaults; 2.2-MHz switching; integrated watchdog. | Includes hardware watchdog and GPIOs; lacks nPOR with delay function and has lower LDO current (250 mA vs 300 mA). | Select when system-level fault recovery and GPIO expansion are prioritized over precise POR delay control and maximum LDO drive. |
Compared with TPS65023RSBR and LP87332D0RGER, LP3907SQX-JXQX/NOPB uniquely combines I²C-programmable DVS, configurable nPOR delay, and 300-mA LDOs with 30-mV dropout-making it optimal for portable SoC platforms requiring runtime voltage adaptation and robust battery-backed startup behavior.
Availability
LP3907SQX-JXQX/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O supply, hearing aid front-end, battery-backed measurement units, and portable medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for LP3907SQX-JXQX/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 energy-efficient IC design.
The LP3907 product line was engineered for low-power, multi-rail power sequencing in portable FPGAs, DSPs, and microprocessors-emphasizing I²C configurability, thermal resilience, and seamless integration with battery-operated systems.
FAQ
What is the default output voltage configuration of LP3907SQX-JXQX/NOPB?
The LP3907SQX-JXQX/NOPB is factory-configured with Buck1 set to 1.2 V, Buck2 to 3.3 V, LDO1 to 2.6 V, and LDO2 to 3.3 V, as specified in Table 3 of the SNVS511U datasheet. These values are stored in one-time-programmable registers and can be modified via I²C commands during system initialization. All outputs maintain ±3% accuracy across temperature and load conditions.
Does LP3907SQX-JXQX/NOPB support dynamic voltage scaling (DVS) for real-time performance adjustment?
Yes, LP3907SQX-JXQX/NOPB supports full dynamic voltage scaling via its 400-kHz I²C interface. Each buck and LDO output voltage is individually programmable-Buck1 from 0.8 V to 2 V, Buck2 from 1 V to 3.5 V, and both LDOs from 1 V to 3.5 V-enabling runtime adjustments to match SoC workload demands without hardware changes.
How does the nPOR function operate on LP3907SQX-JXQX/NOPB, and what is its delay behavior?
The nPOR pin on LP3907SQX-JXQX/NOPB is an open-drain output that remains low until both Buck1 and Buck2 outputs reach ≥94% of their target voltages. Its default delay is 50 ms, determined by the EN_T pin code (010 per Table 3). The delay is programmable via I²C register settings and provides synchronized reset assertion for downstream logic after stable power delivery.
What thermal management provisions are required for LP3907SQX-JXQX/NOPB in a 24-pin WQFN package?
LP3907SQX-JXQX/NOPB in the RTW WQFN package requires connection of the DAP thermal pad to a solid inner-layer ground plane using ≥6 thermal vias (0.3-mm diameter, 0.5-mm pitch). This achieves RθJB = 11.2°C/W, enabling continuous 1-A Buck1 operation at 85°C ambient. Without proper DAP grounding, junction temperature may exceed 125°C under full load.
Can LP3907SQX-JXQX/NOPB operate with input voltages below 2.8 V, and what are the limitations?
LP3907SQX-JXQX/NOPB supports VIN as low as 1.74 V on LDO input pins (VINLDO1/VINLDO2) per Section 7.6, but buck operation requires VIN ≥2.8 V per Section 7.3. Operating Buck1/Buck2 below 2.8 V violates recommended conditions and risks loss of regulation, reduced efficiency, and potential instability due to insufficient headroom for the 0.6-V feedback reference and internal biasing.
LP3907SQX-JXQX/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:
- 2.6V, 300mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 2.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LP3907SQX-JXQX/NOPB FAQ
1.How can I place an order for LP3907SQX-JXQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907SQX-JXQX/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 LP3907SQX-JXQX/NOPB reliable?
The price and inventory of LP3907SQX-JXQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3907SQX-JXQX/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907SQX-JXQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907SQX-JXQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907SQX-JXQX/NOPB?
LP3907SQX-JXQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907SQX-JXQX/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 LP3907SQX-JXQX/NOPB?
For technical support, including LP3907SQX-JXQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907SQX-JXQX/NOPB requirements.
6.How does Aetrix verify that LP3907SQX-JXQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907SQX-JXQX/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 LP3907SQX-JXQX/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907SQX-JXQX/NOPB?
All LP3907SQX-JXQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907SQX-JXQX/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 LP3907SQX-JXQX/NOPB part is unused and in its original packaging.
Return procedure for LP3907SQX-JXQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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