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Texas Instruments LP3907SQ-PFX6W/NOPB
- Part No.:
- LP3907SQ-PFX6W/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LP3907SQ-PFX6W/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,304
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Product details
Overview
LP3907SQ-PFX6W/NOPB from Texas Instruments is a programmable power management IC integrating two synchronous buck converters (1 A @ 1 V, 600 mA @ 3.3 V) and two 300-mA LDOs (2.65 V and 3.2 V), all controlled via 400-kHz I²C interface. It operates from 2.8 V to 5.5 V input, features forced PWM mode, thermal/overcurrent protection, and supports FPGA/DSP core and I/O rail sequencing in space-constrained portable electronics.
For engineers reviewing the LP3907SQ-PFX6W/NOPB datasheet, LP3907SQ-PFX6W/NOPB pinout, LP3907SQ-PFX6W/NOPB application, or LP3907SQ-PFX6W/NOPB equivalent, this device delivers verified dual-buck + dual-LDO integration with I²C programmability, precise voltage accuracy (±3%), and validated thermal performance in WQFN-24 package for low-power embedded systems requiring dynamic voltage scaling and power-on reset coordination.
Technical Context
The LP3907SQ-PFX6W/NOPB implements two independent synchronous buck regulators with 2.1-MHz fixed-frequency PWM operation and forced PWM mode (no PFM transition), enabling stable light-load regulation without frequency modulation artifacts. Each buck includes internal compensation, soft-start, and ±3% output voltage accuracy over temperature and line/load variations.
Its dual LDOs use PMOS pass devices with 30-mV typical dropout at 50 mA, supporting 1 V–3.5 V programmable outputs (2.65 V and 3.2 V per Table 3), while the integrated 400-kHz I²C interface enables real-time register access for voltage setting, enable control, sequencing delay (010 = 100 ms), and UVLO configuration - all coordinated through a single serial 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 V/5 V rails without external pre-regulation. |
| Buck1 Output | 1.0 V @ 1 A - fixed factory-programmed output for low-voltage FPGA/DSP core supply with ±3% accuracy. |
| Buck2 Output | 3.3 V @ 600 mA - fixed factory-programmed output for peripheral I/O or interface rail with ±3% accuracy. |
| LDO1 Output | 2.65 V @ 300 mA - factory-set analog or auxiliary rail with 30-mV typical dropout enabling efficient low-headroom operation. |
| LDO2 Output | 3.2 V @ 300 mA - factory-set rail optimized for sensor interfaces or level-shifting circuits with tight load regulation (0.011%/mA). |
| I²C Interface | 400 kHz standard-mode - enables host microcontroller to configure voltages, enable states, sequencing delays, and monitor status registers without additional GPIOs. |
| Switching Frequency | 2.1 MHz - allows use of compact 2.2-µH inductors and 10-µF ceramic output capacitors, reducing board area and EMI filtering burden. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
LP3907SQ-PFX6W/NOPB uses the RTW 24-pin WQFN package (4.00 mm × 4.00 mm, 0.5-mm pitch) with exposed thermal pad (DAP) for enhanced heat dissipation. The pinout is fully validated per TI SNVS511U datasheet Section 6 (RTW top view) and supports standard PCB layout practices for mixed-signal PMUs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Buck1 input power | Accepts 2.8–5.5 V; must be decoupled with ≥10 µF ceramic capacitor near pin for stability and transient response. |
| SW1 | Buck1 switch node | Connects to 2.2-µH inductor and 10-µF output capacitor; requires tight loop layout to minimize EMI and switching losses. |
| FB1 | Buck1 feedback input | Resistor divider from VOUT1 sets 1.0 V output; high-impedance input enables precision voltage programming. |
| VIN2 | Buck2 input power | Independent input path; may share VIN1 or use separate source for isolation or sequencing control. |
| SW2 | Buck2 switch node | Drives 3.3 V output; same inductor/capacitor requirements as SW1 but sized for 600 mA max current. |
| FB2 | Buck2 feedback input | Factory-configured for 3.3 V; external resistor network not required unless reprogramming is needed via I²C. |
| VINLDO1 | LDO1 input power | Supplies 2.65 V LDO; minimum input is 1.74 V, enabling direct connection to Buck1 or Buck2 outputs. |
| LDO1 | LDO1 regulated output | Delivers 2.65 V @ 300 mA with <30 mV dropout; suitable for noise-sensitive analog circuitry. |
| ENLDO1 | LDO1 enable control | Active-high logic input; can be driven directly by MCU GPIO or controlled via I²C register bit. |
| VINLDO2 | LDO2 input power | Supplies 3.2 V LDO; shares same 1.74 V min input spec, allowing flexible sourcing from system rails. |
| LDO2 | LDO2 regulated output | Provides 3.2 V @ 300 mA with low PSRR (45 dB @ 10 kHz) and 80 µVrms output noise for clean biasing. |
| ENLDO2 | LDO2 enable control | Independent enable signal; supports staggered power-up or dynamic rail disable for power gating. |
| SCL / SDA | I²C clock/data | 400-kHz bidirectional interface; requires 10-kΩ pull-ups to AVDD; enables full register read/write for all regulators. |
| nPOR | Power-on reset output | Open-drain signal asserting low until both Buck1 and Buck2 reach ≥94% of target; includes 100-ms delay (010 code). |
| DAP | Thermal pad | Internally connected to GND; soldering improves θJA from 32.7°C/W to ≤25°C/W in typical 2-layer layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output voltages | Eliminates external resistor networks for Buck1 (1.0 V), Buck2 (3.3 V), LDO1 (2.65 V), and LDO2 (3.2 V), reducing BOM count and layout complexity. |
| Forced PWM mode | Ensures constant 2.1-MHz switching frequency across full load range - critical for EMI predictability and avoiding audible noise in portable devices. |
| Integrated power-on sequencing | Configurable delay (010 = 100 ms) between Buck1/Buck2 activation and nPOR assertion enables safe FPGA core/I/O power-up order without external timers. |
| Ultra-low shutdown current | 10 nA (0.01 µA) quiescent current when all regulators disabled - extends battery life in always-on sensor nodes or backup systems. |
| Thermal and overcurrent protection | Auto-recovering shutdown at 160°C and cycle-by-cycle peak-current limiting (1.5 A Buck1 / 1 A Buck2) prevent damage during fault conditions. |
| High-accuracy reference | ±3% output voltage tolerance over –40°C to +125°C ensures reliable operation in industrial and automotive-adjacent environments. |
Applications
| FPGA Core Power | DSP I/O Supply |
|---|---|
|
Use Scenario: Powering Xilinx Spartan-7 or Intel MAX 10 FPGA core logic operating at 1.0 V. IC Role / Device Role / Timing Role: LP3907SQ-PFX6W/NOPB delivers tightly regulated 1.0 V @ 1 A with fast transient response and ±3% accuracy to meet FPGA core voltage tolerance. Use Value: Eliminates need for discrete buck controller + MOSFET + compensation network, reducing solution size by >40% versus discrete implementation. |
Use Scenario: Supplying 3.3 V I/O banks for TI C6748 DSP in portable test equipment. IC Role / Device Role / Timing Role: LP3907SQ-PFX6W/NOPB provides 3.3 V @ 600 mA with programmable enable timing to coordinate with core rail power-up. Use Value: Factory-set 3.3 V output and I²C control allow seamless integration into existing firmware without hardware modification. |
| Hearing Aid Audio Bias | Electronic Measurement Unit |
|
Use Scenario: Generating ultra-low-noise 2.65 V bias for MEMS microphone preamplifiers in Class I hearing aids. IC Role / Device Role / Timing Role: LP3907SQ-PFX6W/NOPB's LDO1 delivers 2.65 V @ 300 mA with 80 µVrms noise and 30-mV dropout, minimizing headroom loss. Use Value: Replaces discrete LDO + filter stages, achieving >15 dB lower output noise than standard 300-mA LDOs at 10–100 kHz. |
Use Scenario: Powering 3.2 V ADC reference and 1.0 V digital core in handheld multimeter with battery backup. IC Role / Device Role / Timing Role: LP3907SQ-PFX6W/NOPB supplies both rails simultaneously with coordinated nPOR signaling to ensure clean system reset. Use Value: Integrated UVLO (2.7 V–2.9 V) and thermal shutdown prevent brownout-induced measurement errors during battery depletion. |
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 600-mA bucks + dual 260-mA LDOs; 2.5–5.5 V input; no factory-programmed outputs - requires external resistors for all voltages. | Supports higher total current (1.8 A bucks) but lacks fixed 1.0 V/3.3 V/2.65 V/3.2 V configuration; needs I²C initialization for every power cycle. | Select when flexible voltage selection across multiple designs is prioritized over BOM reduction and startup simplicity. |
| LP87332D0RGER | Dual 3-A bucks + dual 300-mA LDOs; 2.8–5.5 V input; supports dynamic voltage scaling via I²C; 2.2-MHz switching. | Higher current capability suits more demanding processors; however, default outputs differ (0.6–1.52 V bucks, 0.9–3.6 V LDOs) and require full register configuration. | Choose when scaling core voltage under software control is required, and 1.0 V/3.3 V factory defaults are not mandatory. |
Compared with TPS65023RSBR and LP87332D0RGER, LP3907SQ-PFX6W/NOPB offers immediate plug-and-play operation with zero external components for its four factory-programmed rails, significantly reducing validation time and layout risk for cost-sensitive, volume-sensitive portable electronics where fixed 1.0 V/3.3 V/2.65 V/3.2 V rails are standardized.
Availability
LP3907SQ-PFX6W/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O supply, and hearing aid audio bias applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP3907SQ-PFX6W/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 integrated PMUs.
The LP3907 product line was designed specifically for low-power FPGAs, microprocessors, and DSPs requiring compact, I²C-programmable multi-rail power solutions with factory-configured outputs and robust protection features.
FAQ
What are the factory-programmed output voltages of the LP3907SQ-PFX6W/NOPB?
The LP3907SQ-PFX6W/NOPB has four factory-programmed outputs: Buck1 delivers 1.0 V at up to 1 A, Buck2 delivers 3.3 V at up to 600 mA, LDO1 delivers 2.65 V at up to 300 mA, and LDO2 delivers 3.2 V at up to 300 mA. These values are fixed per TI's orderable addendum and do not require external resistor networks or I²C configuration to operate.
Does the LP3907SQ-PFX6W/NOPB support dynamic voltage scaling (DVS)?
No - the LP3907SQ-PFX6W/NOPB is configured in forced PWM mode per Table 3 and does not support automatic DVS. Its output voltages are factory-fixed and cannot be adjusted via I²C registers; DVS capability requires alternative parts like LP87332D0RGER.
What is the purpose of the nPOR pin on the LP3907SQ-PFX6W/NOPB?
The nPOR pin on the LP3907SQ-PFX6W/NOPB is an open-drain power-on reset output that remains low until both Buck1 and Buck2 reach ≥94% of their target voltages, then asserts high after a 100-ms delay (010 code). It provides synchronized system reset signaling for host processors or FPGAs.
Can the LP3907SQ-PFX6W/NOPB operate with input voltage below 2.8 V?
No - the absolute minimum input voltage for LP3907SQ-PFX6W/NOPB is 2.8 V per Recommended Operating Conditions (Section 7.3). While LDO inputs (VINLDO1/VINLDO2) tolerate as low as 1.74 V, the main VIN1/VIN2 pins require ≥2.8 V to maintain regulation, efficiency, and protection functionality.
Is the thermal pad (DAP) of the LP3907SQ-PFX6W/NOPB required to be connected to ground?
Yes - the DAP on the LP3907SQ-PFX6W/NOPB must be soldered to a PCB thermal pad connected to GND for reliable thermal performance. Though not electrically mandatory for basic operation, omitting DAP connection degrades θJA from 32.7°C/W to >50°C/W, risking thermal shutdown above 400 mW dissipation in ambient conditions.
LP3907SQ-PFX6W/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:
- 1V, 1A
- Voltage/Current - Output 2:
- 3.3V, 600mA
- Voltage/Current - Output 3:
- 2.65V, 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)
LP3907SQ-PFX6W/NOPB FAQ
1.How can I place an order for LP3907SQ-PFX6W/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907SQ-PFX6W/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 LP3907SQ-PFX6W/NOPB reliable?
The price and inventory of LP3907SQ-PFX6W/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3907SQ-PFX6W/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907SQ-PFX6W/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907SQ-PFX6W/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907SQ-PFX6W/NOPB?
LP3907SQ-PFX6W/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907SQ-PFX6W/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 LP3907SQ-PFX6W/NOPB?
For technical support, including LP3907SQ-PFX6W/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907SQ-PFX6W/NOPB requirements.
6.How does Aetrix verify that LP3907SQ-PFX6W/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907SQ-PFX6W/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 LP3907SQ-PFX6W/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907SQ-PFX6W/NOPB?
All LP3907SQ-PFX6W/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907SQ-PFX6W/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 LP3907SQ-PFX6W/NOPB part is unused and in its original packaging.
Return procedure for LP3907SQ-PFX6W/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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