Texas Instruments LP3907TLX-JSXS/NOPB

Overview

LP3907TLX-JSXS/NOPB from Texas Instruments is a programmable power management unit (PMU) integrating two synchronous buck converters (1 A @ 0.8–2 V, 600 mA @ 1–2.8 V) and two 300-mA LDOs (1–3.3 V, 2.8 V), all controlled via 400-kHz I²C interface. It supports dynamic voltage scaling, programmable power-on sequencing, and operates from 2.8 V to 5.5 V input - optimized for FPGA core and I/O rail power in portable medical and test equipment.

For engineers reviewing the LP3907TLX-JSXS/NOPB datasheet, LP3907TLX-JSXS/NOPB pinout, LP3907TLX-JSXS/NOPB application, or LP3907TLX-JSXS/NOPB equivalent, this page delivers verified electrical specs, validated WQFN-24 package mapping, confirmed I²C register control architecture, thermal shutdown behavior at 160°C, and real-world use cases in battery-backed measurement units and hearing aids.

Technical Context

The LP3907TLX-JSXS/NOPB implements dual independent buck regulators with PWM-to-PFM automatic mode switching, 2.1-MHz fixed-frequency operation, and ±3% output voltage accuracy. Its LDOs feature 30-mV typical dropout and 45-dB PSRR at 10 kHz, powered by dedicated analog rails (AVDD, VINLDO12) and isolated ground paths (GND_C, GND_L, GND_SW1/2).

Control logic includes an open-drain nPOR signal with 50-ms delay, programmable UVLO (2.7–2.9 V), and I²C-addressable registers enabling per-rail enable/disable, voltage setting, and sequencing configuration. Thermal protection engages at 160°C with 20°C hysteresis, and shutdown current is 0.01 µA when all blocks are disabled.

Key Specifications

Pinout & Package

LP3907TLX-JSXS/NOPB is housed in a 24-pin WQFN (RTW) package with 0.5-mm pitch and thermally enhanced exposed die attach pad (DAP). The DAP must be soldered to a PCB thermal plane for reliable operation above 500 mW dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMU applications.

Compared with TPS65023RSBR and MAX8646ETE+, the LP3907TLX-JSXS/NOPB uniquely combines 1-A buck capability, factory-configured 1.2-V/2.8-V outputs, integrated nPOR with delay, and thermal shutdown hysteresis - making it optimal for space-constrained, battery-operated FPGA and DSP platforms demanding both flexibility and reliability.

Availability

LP3907TLX-JSXS/NOPB is available at Aetrix Electronics and suitable for FPGA core power, peripheral I/O power, hearing aid DSP supply, electronic measurement units, and battery-backed equipment requiring stable component supply across industrial temperature range (−40°C to +125°C).

Supply support for LP3907TLX-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 over 90 years of innovation in high-reliability power solutions.

The LP3907TLX-JSXS/NOPB belongs to TI's low-power PMU product line, designed specifically for portable and battery-operated systems requiring tightly regulated, sequenced, and dynamically scalable power rails for FPGAs, DSPs, and mixed-signal SoCs.

FAQ

What is the default output voltage configuration of LP3907TLX-JSXS/NOPB?

The LP3907TLX-JSXS/NOPB is factory-programmed with Buck1 set to 1.2 V @ 1 A, Buck2 to 2.8 V @ 600 mA, LDO1 to 3.3 V @ 300 mA, and LDO2 to 2.8 V @ 300 mA. These values are stored in nonvolatile configuration registers and can be modified via I²C commands during system operation or boot sequence.

Does LP3907TLX-JSXS/NOPB support automatic power-on sequencing?

Yes, LP3907TLX-JSXS/NOPB includes programmable power-on sequencing controlled through its I²C interface. The default sequence delay (010 = 50 ms) between Buck1, Buck2, LDO1, and LDO2 is configurable via register address 0x12, enabling safe startup for FPGAs and processors with strict voltage ramp requirements.

What package type and thermal characteristics apply to LP3907TLX-JSXS/NOPB?

LP3907TLX-JSXS/NOPB uses the RTW 24-pin WQFN package (4.0 mm × 4.0 mm) with exposed DAP. Its junction-to-ambient thermal resistance (RθJA) is 32.7°C/W, and junction-to-board (RθJB) is 11.2°C/W - requiring minimum 200 mm² copper pour under the DAP for full 1-A buck operation at 85°C ambient.

Can LP3907TLX-JSXS/NOPB operate with input voltage below 2.8 V?

No - LP3907TLX-JSXS/NOPB has a hard input voltage limit of 2.8 V minimum per Recommended Operating Conditions. Attempting operation below this threshold disables regulation, triggers undervoltage lockout (UVLO), and forces all outputs into shutdown regardless of enable pin states.

How does the nPOR function behave during brownout conditions on LP3907TLX-JSXS/NOPB?

During brownout, LP3907TLX-JSXS/NOPB asserts nPOR low when either Buck1 or Buck2 output falls below 85% of its target voltage. The pin remains low until both outputs recover to ≥94% of target and hold for the programmed delay period - ensuring robust reset signaling even during partial rail collapse.