My Inquiry
My Account
Texas Instruments LP3907SQX-PJXIX/NOPB
- Part No.:
- LP3907SQX-PJXIX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LP3907SQX-PJXIX/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,571
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP3907SQX-PJXIX/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 1.2 V/1 A (Buck1) and 3.3 V/600 mA (Buck2), and supports dynamic voltage scaling for FPGA/DSP core power.
For engineers reviewing the LP3907SQX-PJXIX/NOPB datasheet, LP3907SQX-PJXIX/NOPB pinout, LP3907SQX-PJXIX/NOPB application, or LP3907SQX-PJXIX/NOPB equivalent, this device enables precise sequencing, thermal/overcurrent protection, and light-load PFM mode-critical for battery-backed portable instrumentation and low-power embedded processors.
Technical Context
The LP3907SQX-PJXIX/NOPB implements forced PWM mode for both buck regulators, ensuring consistent 2.1-MHz switching frequency and ±3% output accuracy across temperature. Its I²C interface provides independent register access to enable/disable, set output voltages (Buck1: 0.8–2 V; Buck2: 1–3.5 V; LDO1/LDO2: 1–3.5 V), and configure power-on reset delay (010 = 100 ms).
It integrates dedicated analog ground (GND_C), switching grounds (GND_SW1/GND_SW2), and LDO ground (GND_L) to minimize noise coupling. The device uses PMOS pass elements in LDOs (30-mV typical dropout at 50 mA) and synchronous rectification in bucks for up to 96% efficiency at mid-load.
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 | 1.2 V @ 1 A - factory-programmed fixed output; meets FPGA core voltage requirements with ±3% accuracy. |
| Buck2 Output | 3.3 V @ 600 mA - factory-programmed fixed output; powers I/O banks or peripheral interfaces. |
| LDO1 Output | 1.8 V @ 300 mA - factory-programmed; supplies low-noise analog circuitry or memory I/O with 80 µVrms output noise. |
| LDO2 Output | 3.3 V @ 300 mA - factory-programmed; provides clean bias for sensors or communication interfaces. |
| I²C Interface | 400 kHz standard-mode - enables host processor to dynamically adjust outputs, monitor status, and control sequencing. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
LP3907SQX-PJXIX/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-density layout and efficient heat dissipation when the DAP is soldered to PCB ground plane.
| 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-high input initiates factory-configured power-up sequence (010 = 100 ms delay between Buck1/Buck2 activation). |
| nPOR | Open-drain power-good output | Signals valid regulation of Buck1/Buck2; pulled low if either output falls below 94% of target or rises above 85% during turn-off. |
| SW1 / SW2 | Buck switch node outputs | Connect to external 2.2-µH inductors; require low-ESR 10-µF ceramic output capacitors per buck stage. |
| FB1 / FB2 | Feedback inputs | Resistor-divider inputs for adjustable outputs; unused in LP3907SQX-PJXIX/NOPB due to factory-programmed fixed voltages. |
| SDA / SCL | I²C bidirectional data/clock | Supports 400-kHz communication; requires 4.7-kΩ pull-ups to AVDD; enables real-time voltage reconfiguration and fault monitoring. |
| GND_C / GND_SW1 / GND_SW2 / GND_L | Dedicated ground terminals | Separate analog core, buck switching, and LDO grounds reduce noise coupling and improve PSRR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage scaling (DVS) | Enables host-controlled adjustment of Buck1/Buck2 outputs via I²C registers-reducing power consumption during low-performance states. |
| Programmable power-on sequencing | Configurable delay (001/010/011 = 50/100/200 ms) between Buck1 and Buck2 activation prevents inrush current conflicts in multi-rail systems. |
| PWM-to-PFM automatic mode change | Switches to pulse-frequency modulation under light load (<10 mA), reducing quiescent current to 33 µA and maintaining >85% efficiency. |
| Integrated precision reference | Internal 1.2-V bandgap reference with <±1% drift over −40°C to +125°C ensures stable feedback accuracy without external components. |
| Undervoltage lockout (UVLO) | Disables all regulators when VINLDO12 drops below 2.7 V (falling) or 2.9 V (rising), preventing erratic operation during brownout conditions. |
Applications
| FPGA Core Power | DSP Processor Supply |
|---|---|
Use Scenario: Powering Xilinx Spartan-7 or Intel MAX 10 FPGA core logic requiring tightly regulated 1.2 V at up to 1 A. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering stable core voltage with soft-start and dynamic voltage scaling support. Use Value: Eliminates need for discrete buck controller + MOSFET + compensation network; reduces BOM count by 7+ components. |
Use Scenario: Supplying TI C674x DSP core and memory interface with independent 1.2 V (core) and 3.3 V (I/O) rails. IC Role / Device Role / Timing Role: Dual-buck + dual-LDO PMU providing sequenced, monitored, and I²C-adjustable power domains. Use Value: Enables runtime voltage adaptation during algorithm transitions-cutting active power by up to 35% in compute-intensive tasks. |
| Portable Medical Instrumentation | Battery-Backed Data Acquisition |
Use Scenario: Powering ultra-low-noise analog front-end (AFE) and microcontroller in handheld hearing aid or ECG monitor. IC Role / Device Role / Timing Role: LDO1 (1.8 V) supplies AFE bias; LDO2 (3.3 V) powers ADC reference; bucks power digital subsystem. Use Value: 80 µVrms LDO output noise and 45 dB PSRR at 10 kHz ensure <1 LSB error in 16-bit ADC measurements. |
Use Scenario: Maintaining RTC, SRAM, and sensor bias during main power loss in industrial data loggers using coin-cell backup. IC Role / Device Role / Timing Role: Low-quiescent-current LDOs (40 µA on, 30 nA off) sustain critical functions while minimizing battery drain. Use Value: Extends 3-V coin-cell life to >5 years in always-on monitoring mode with 100-ms POR delay preventing false resets. |
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 (2×1.5 A, 1×1 A) + 2×LDO; no I²C, uses hardware pins for configuration; higher IQ (100 µA). | Fixed-output, non-programmable sequencing; suited for cost-sensitive designs where voltage flexibility is not required. | Select when I²C control is unnecessary and higher current per buck is needed-requires redesign of enable logic and feedback networks. |
| LP87332D0RGER | Dual buck (2×1.5 A) + dual LDO; I²C-compatible but supports only 100-kHz mode; lower max input (5.2 V); no nPOR pin. | Lacks open-drain power-good signal and UVLO hysteresis; requires external POR circuit for safety-critical systems. | Choose for newer TI platforms with legacy I²C buses; verify compatibility with existing firmware due to register map differences. |
Compared with TPS65023RSBR and LP87332D0RGER, LP3907SQX-PJXIX/NOPB offers superior light-load efficiency via PFM mode, integrated nPOR with delay, and tighter output accuracy-making it optimal for portable instrumentation demanding precision and configurability.
Availability
LP3907SQX-PJXIX/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP processor supply, portable medical instrumentation, and battery-backed data acquisition requiring stable component supply and long-term lifecycle support.
Supply support for LP3907SQX-PJXIX/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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LP3907 product line targets low-power, multi-rail applications in portable electronics and embedded systems-designed to consolidate discrete power stages into a single programmable PMU with I²C control and robust protection features.
FAQ
What is the default I²C address for LP3907SQX-PJXIX/NOPB?
The LP3907SQX-PJXIX/NOPB uses the WQFN (RTW) package, which has a default I²C address of 0x60 (hexadecimal). This address is hardwired and cannot be changed via pins or registers. Communication must use standard 7-bit addressing with this value to access LP3907SQX-PJXIX/NOPB's control registers for voltage configuration, sequencing, and status monitoring.
Does LP3907SQX-PJXIX/NOPB support dynamic voltage scaling (DVS)?
Yes, LP3907SQX-PJXIX/NOPB supports dynamic voltage scaling via its I²C interface. The device allows real-time adjustment of Buck1 and Buck2 output voltages within their respective ranges (Buck1: 0.8–2 V; Buck2: 1–3.5 V), enabling host processors to reduce power during low-compute states. DVS is implemented through dedicated voltage-control registers accessible over the 400-kHz I²C bus.
What is the purpose of the nPOR pin on LP3907SQX-PJXIX/NOPB?
The nPOR pin on LP3907SQX-PJXIX/NOPB is an open-drain power-good output that signals valid regulation of both Buck1 and Buck2. It is pulled low when either output falls below 85% of its target during turn-off or fails to reach 94% during startup. With an internal 100-kΩ pull-up, nPOR provides system-level reset coordination-ensuring downstream logic remains held until stable power is confirmed.
Can LP3907SQX-PJXIX/NOPB operate with input voltage below 2.8 V?
No, LP3907SQX-PJXIX/NOPB requires a minimum input voltage of 2.8 V across VIN1, VIN2, and VINLDO12 to guarantee proper operation of all regulators and internal circuitry. While LDO1/LDO2 inputs (VINLDO1/VINLDO2) tolerate down to 1.74 V, this applies only when powered from a pre-regulated source like another buck output-not as primary input. Operating below 2.8 V violates recommended conditions and may cause undervoltage lockout or unstable regulation.
How does LP3907SQX-PJXIX/NOPB handle thermal overload?
LP3907SQX-PJXIX/NOPB incorporates thermal shutdown circuitry that disables all regulators when junction temperature exceeds 160°C (typical), with 20°C hysteresis for recovery. This protection is independent of load current and activates based on die temperature sensed internally. Once cooled below 140°C, the device automatically resumes operation-no manual reset is required. Thermal performance depends on PCB copper area and DAP soldering quality.
LP3907SQX-PJXIX/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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LP3907SQX-PJXIX/NOPB FAQ
1.How can I place an order for LP3907SQX-PJXIX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907SQX-PJXIX/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-PJXIX/NOPB reliable?
The price and inventory of LP3907SQX-PJXIX/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-PJXIX/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907SQX-PJXIX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907SQX-PJXIX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907SQX-PJXIX/NOPB?
LP3907SQX-PJXIX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907SQX-PJXIX/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-PJXIX/NOPB?
For technical support, including LP3907SQX-PJXIX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907SQX-PJXIX/NOPB requirements.
6.How does Aetrix verify that LP3907SQX-PJXIX/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907SQX-PJXIX/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-PJXIX/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907SQX-PJXIX/NOPB?
All LP3907SQX-PJXIX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907SQX-PJXIX/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-PJXIX/NOPB part is unused and in its original packaging.
Return procedure for LP3907SQX-PJXIX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP3907SQX-PJXIX/NOPB Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
