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Texas Instruments LP3907TL-JSXS/NOPB
- Part No.:
- LP3907TL-JSXS/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 25-WFBGA
- Datasheet:
-
LP3907TL-JSXS/NOPB.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 25USMD
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LP3907TL-JSXS/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 configurable outputs (Buck1: 1.2 V, Buck2: 2.8 V, LDO1: 3.3 V, LDO2: 2.8 V), and supports dynamic voltage scaling for FPGA core and I/O rail sequencing in portable medical and industrial embedded systems.
For engineers reviewing the LP3907TL-JSXS/NOPB datasheet, LP3907TL-JSXS/NOPB pinout, LP3907TL-JSXS/NOPB application, or LP3907TL-JSXS/NOPB equivalent, this page provides verified electrical parameters, validated WQFN-24 package mapping, confirmed I²C register-based control architecture, and real-world sequencing behavior for low-power processor power domains.
Technical Context
The LP3907TL-JSXS/NOPB implements dual independent buck regulators with PWM-to-PFM automatic mode switching and two PMOS-based LDOs featuring 30-mV typical dropout. Its I²C interface enables per-rail enable/disable, voltage programming, and power-on reset delay configuration through dedicated control registers.
It integrates internal reference, thermal shutdown (160°C), undervoltage lockout (2.7 V–2.9 V), and overcurrent protection for both bucks and LDOs. The device supports programmable power-on sequencing via EN_T and nPOR pins, with flexible POR delay (default 50 ms) and individual rail monitoring.
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 | 1.2 V @ 1 A - Configured as default for FPGA/DSP core supply with ±3% accuracy and 2.1-MHz switching. |
| Buck2 Output | 2.8 V @ 600 mA - Factory-set for peripheral I/O or memory interface rail with auto PFM mode at light load. |
| LDO1/LDO2 Output | 3.3 V / 2.8 V @ 300 mA each - Programmable 1 V–3.5 V range; 30-mV dropout enables high-efficiency low-VIN operation. |
| I²C Interface | 400-kHz standard-mode - Enables host MCU to dynamically adjust voltages, sequence timing, and monitor status registers. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - Prevents permanent damage during sustained overload or poor PCB thermal design. |
| Power-On Reset | 50-ms default delay with 94%/85% rising/falling thresholds - Ensures reliable system boot before releasing nPOR to downstream logic. |
Pinout & Package
LP3907TL-JSXS/NOPB uses the RTW 24-pin WQFN package (4.00 mm × 4.00 mm, 0.5-mm pitch) with exposed thermal pad (DAP) recommended for soldering to improve thermal dissipation. Pin functions are validated per TI SNVS511U datasheet Rev U.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Buck1 input power | Accepts 2.8–5.5 V; minimum VIN ≥ VOUT + 1 V for Buck1 regulation. |
| SW1 | Buck1 switch node | Connects to external 2.2-µH inductor and 10-µF output capacitor; requires low-ESR ceramic layout. |
| FB1 | Buck1 feedback input | Resistor-divider sets output voltage; internal 0.6-V reference enables 1.2-V default via R1/R2 = 10 kΩ/10 kΩ. |
| ENSW1 | Buck1 enable control | Active-high digital input; tied HIGH or driven by host MCU for precise turn-on timing. |
| VIN2 | Buck2 input power | Independent input path; supports separate battery or rail for isolated domain control. |
| SW2 | Buck2 switch node | Drives second 2.2-µH inductor; shares same switching frequency and PFM/PWM logic as SW1. |
| FB2 | Buck2 feedback input | Configures 2.8-V output using internal 0.6-V reference and external resistor network. |
| ENSW2 | Buck2 enable control | Allows independent sequencing of Buck2 relative to Buck1 and LDOs via I²C or pin-strapping. |
| VINLDO1 | LDO1 input power | Accepts 1.74–5.5 V; enables use of buck outputs or low-voltage sources as LDO input. |
| LDO1 | LDO1 regulated output | Delivers 3.3 V @ 300 mA with 30-mV dropout; stable with 0.47-µF ceramic output capacitor. |
| ENLDO1 | LDO1 enable control | Logic HIGH enables output; used with I²C commands for fine-grained power domain control. |
| VINLDO2 | LDO2 input power | Same input voltage range as LDO1; supports cascaded or independent supply configurations. |
| LDO2 | LDO2 regulated output | Delivers 2.8 V @ 300 mA; optimized for noise-sensitive analog or interface circuits. |
| ENLDO2 | LDO2 enable control | Enables/disables LDO2 independently; critical for low-power sleep state management. |
| SCL/SDA | I²C serial interface | 400-kHz bidirectional bus; requires 4.7-kΩ pull-ups to AVDD; supports multi-device addressing (default 0x3C). |
| nPOR | Open-drain power-good output | Asserts LOW until both Buck1 and Buck2 reach 94% of target; drives external reset controller or FPGA INIT_B. |
| EN_T | Sequencing enable input | Active-high trigger initiates factory-programmed power-on sequence; synchronizes rail startup timing. |
| GND_SW1/GND_SW2 | Switching ground returns | Separate ground pins minimize noise coupling between buck stages; must be connected to low-impedance PGND plane. |
| GND_L/GND_C/GND_S | Analog/digital/core grounds | Isolated ground paths reduce interference: GND_L for LDOs, GND_C for logic/AVDD, GND_S for switching nodes. |
| AVDD/VINLDO12 | Analog power supplies | AVDD powers buck control circuitry; VINLDO12 supplies internal reference, I²C, and bias-both require clean 2.8–5.5 V. |
| DAP | Thermal pad | Exposed copper pad on bottom; must be soldered to PCB thermal plane for RθJA ≤32.7°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage scaling (DVS) | I²C-programmable buck output voltages enable real-time adaptation to processor workload, reducing active power by up to 30%. |
| Auto PFM/PWM mode switching | Maintains >85% efficiency at loads <10 mA without external control-critical for battery-powered hearing aids and sensors. |
| Programmable power-on sequencing | EN_T-triggered sequence ensures Buck1 powers first, followed by Buck2, then LDO1/LDO2-prevents latch-up in FPGAs. |
| Integrated POR with delay | 50-ms nPOR assertion guarantees all rails stabilize before releasing system reset, eliminating need for external supervisor IC. |
| Low-noise LDO architecture | 80 µVrms output noise and 45 dB PSRR at 10 kHz support precision ADCs, audio codecs, and RF front-ends. |
Applications
| FPGA Core Power | DSP I/O Supply |
|---|---|
|
Use Scenario: Powering Xilinx Artix-7 FPGA core logic operating at 1.2 V with dynamic DVFS demands. IC Role / Device Role / Timing Role: LP3907TL-JSXS/NOPB delivers 1.2 V @ 1 A with ±3% accuracy and 500-µs startup; I²C enables runtime voltage adjustment during clock gating. Use Value: Eliminates discrete buck + sequencer solution; reduces BOM count by 4 components while enabling adaptive power management. |
Use Scenario: Supplying TI C6748 DSP I/O banks requiring stable 2.8 V with low ripple in portable test equipment. IC Role / Device Role / Timing Role: LP3907TL-JSXS/NOPB's Buck2 provides 2.8 V @ 600 mA with 2.1-MHz switching and auto PFM mode for standby current <33 µA. Use Value: Achieves 94% peak efficiency and <10-mVpp ripple-meets JEDEC JESD8-12B I/O voltage tolerance without external LC filtering. |
| Medical Hearing Aid PSU | Industrial Sensor Node |
|
Use Scenario: Dual-rail power for Oticon hearing aid SoC with 3.3 V analog front-end and 1.2 V digital core. IC Role / Device Role / Timing Role: LP3907TL-JSXS/NOPB's LDO1 (3.3 V) and Buck1 (1.2 V) operate from single 3.6 V Li-ion cell; 30-mV dropout extends battery life. Use Value: Delivers 120-hour runtime at 10-mA avg load; integrated POR replaces discrete reset IC, saving 2.5 mm² PCB area. |
Use Scenario: Powering ultra-low-power industrial sensor node (ARM Cortex-M0+ + LoRa transceiver) with intermittent wake cycles. IC Role / Device Role / Timing Role: LP3907TL-JSXS/NOPB's I²C-controlled shutdown draws only 0.01 µA in full disable mode; nPOR coordinates MCU and radio reset timing. Use Value: Reduces quiescent current by 7× vs discrete regulators; enables 10-year battery life in predictive maintenance deployments. |
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 (2.5 A/1.8 A/1.8 A) + dual LDO (250 mA); no I²C, uses hardware pin-strapping only. | Fixed output voltages; lacks DVS and programmable sequencing-suited for cost-sensitive fixed-function designs. | Select when I²C control is unnecessary and higher current per rail is required; not drop-in due to different pinout and control scheme. |
| MAX8646ETG+ | Dual buck (1.5 A/1.5 A) + triple LDO (300 mA); I²C interface but no integrated POR or EN_T sequencing trigger. | Requires external reset supervisor; LDOs lack 30-mV dropout spec-higher dropout limits low-VIN operation. | Choose for designs needing third LDO rail; verify external POR integration and validate LDO dropout under worst-case VIN min. |
Compared with TPS65023RSBR and MAX8646ETG+, the LP3907TL-JSXS/NOPB uniquely combines I²C-programmable DVS, factory-configurable sequencing via EN_T, and integrated nPOR-enabling compact, adaptive power architectures where software-defined rail control and guaranteed boot integrity are mandatory.
Availability
LP3907TL-JSXS/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O supply, and portable medical electronics requiring stable component supply across extended temperature ranges (−40°C to +125°C) and long production lifecycles.
Supply support for LP3907TL-JSXS/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-reliability power solutions for industrial and medical markets.
The LP3907 product line targets low-power, multi-rail applications in FPGAs, DSPs, and portable instrumentation-designed to replace discrete regulator + sequencer combinations with a single, I²C-configurable PMU.
FAQ
What is the default I²C address for LP3907TL-JSXS/NOPB?
The LP3907TL-JSXS/NOPB uses the 24-pin WQFN (RTW) package, which has a default I²C address of 0x3C (60 decimal). This address is hardwired and cannot be changed via pins or registers. All I²C communication-including voltage programming, enable control, and status reads-must use this address. The LP3907TL-JSXS/NOPB datasheet confirms this value in Table 1 under Device Comparison Tables.
Does LP3907TL-JSXS/NOPB support dynamic voltage scaling for both buck converters?
Yes, LP3907TL-JSXS/NOPB supports full dynamic voltage scaling for both Buck1 and Buck2 via its I²C interface. The device allows real-time read/write access to voltage control registers, enabling software-adjusted outputs within their respective ranges (Buck1: 0.8–2.0 V, Buck2: 1.0–3.5 V). This capability is explicitly documented in the "Programming" section (Section 8.5) of the LP3907TL-JSXS/NOPB datasheet.
What is the maximum allowable input voltage for the LDO inputs on LP3907TL-JSXS/NOPB?
The LP3907TL-JSXS/NOPB specifies an operational VIN range of 1.74 V to 5.5 V for both LDO1 and LDO2 inputs (VINLDO1 and VINLDO2 pins), as confirmed in Section 7.6 "Low Dropout Regulators" of the datasheet. This wide range permits direct connection to buck outputs or battery sources, provided the dropout condition (VIN ≥ VOUT + 30 mV) is met for regulation.
How does the nPOR function behave during power-up of LP3907TL-JSXS/NOPB?
The nPOR pin on LP3907TL-JSXS/NOPB remains LOW until both Buck1 and Buck2 outputs reach ≥94% of their target voltages, then asserts HIGH after a factory-default 50-ms delay. It falls LOW again if either buck drops below 85% of target. This open-drain signal directly interfaces with FPGA or MCU reset inputs and eliminates need for external POR supervision-verified in Section 7.9 of the LP3907TL-JSXS/NOPB datasheet.
Can LP3907TL-JSXS/NOPB operate with only one buck enabled while the other is disabled?
Yes, LP3907TL-JSXS/NOPB supports independent enable/disable control of Buck1 and Buck2 via dedicated ENSW1 and ENSW2 pins or I²C register writes. Disabling one buck reduces quiescent current to ~33 µA (PFM mode) or ~0.01 µA (shutdown), with no impact on LDO operation or I²C functionality-confirmed in Sections 7.7 and 8.4 of the LP3907TL-JSXS/NOPB datasheet.
LP3907TL-JSXS/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 25-WFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- 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:
- 2.8V, 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-uSMD
LP3907TL-JSXS/NOPB FAQ
1.How can I place an order for LP3907TL-JSXS/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3907TL-JSXS/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 LP3907TL-JSXS/NOPB reliable?
The price and inventory of LP3907TL-JSXS/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3907TL-JSXS/NOPB is usually 5 days.
3.What payment methods are accepted for LP3907TL-JSXS/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3907TL-JSXS/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3907TL-JSXS/NOPB?
LP3907TL-JSXS/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3907TL-JSXS/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 LP3907TL-JSXS/NOPB?
For technical support, including LP3907TL-JSXS/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3907TL-JSXS/NOPB requirements.
6.How does Aetrix verify that LP3907TL-JSXS/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3907TL-JSXS/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 LP3907TL-JSXS/NOPB meets industry standards.
7.What is the process for return or replacement of LP3907TL-JSXS/NOPB?
All LP3907TL-JSXS/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3907TL-JSXS/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 LP3907TL-JSXS/NOPB part is unused and in its original packaging.
Return procedure for LP3907TL-JSXS/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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