Texas Instruments LP8725TLE-D/NOPB

Overview

LP8725TLE-D/NOPB from Texas Instruments is a programmable power management unit (PMU) integrating two 600-mA step-down DC-DC converters (configurable up to 800 mA), three digital LDOs (300 mA each), two low-noise analog 300-mA LDOs, and two low-input/low-output regulators - all controlled via I²C interface for dynamic voltage scaling and configurable power-on sequencing in multimedia processor subsystems.

For engineers reviewing the LP8725TLE-D/NOPB datasheet, LP8725TLE-D/NOPB pinout, LP8725TLE-D/NOPB application, or LP8725TLE-D/NOPB equivalent, key selection criteria include output voltage configurability across seven regulated rails, thermal shutdown protection, ±2% output voltage accuracy, and support for both SUB_PMU and stand-alone PMU configurations via CONFIG pin wiring.

Technical Context

The LP8725TLE-D/NOPB implements dual buck converters with 4-MHz switching frequency enabling use of compact 1-µH inductors, and supports Dynamic Voltage Scaling (DVS) for BUCK1 via dedicated DVS pin or serial interface. Startup sequence is programmable and determined by DEFSEL pin state (VIN1 or GND), defining default voltages and enable order across BUCKs, LILOs, and LDOs.

It features two independent ground paths (GNDB1/GNDB2) for buck converters, separate input pins per regulator domain (VINB1/VINB2 for bucks; VIN1/VIN2/VIN3 for LDOs; VINLILO1/VINLILO2 for LILOs), and fault detection that asserts RESET_N on unmasked output short-circuit events - all within a 30-bump DSBGA package with 0.5-mm pitch.

Key Specifications

Pinout & Package

LP8725TLE-D/NOPB uses a 30-bump DSBGA package (0.5 mm pitch) with bottom-side ball layout. Pin functions are defined by physical position and CONFIG pin state (SUB_PMU vs. PMU mode).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power management applications.

Compared with LP8725TLE-C/NOPB and LP8725TLE-B/NOPB, the LP8725TLE-D/NOPB provides balanced default activation - enabling BUCK1, BUCK2, LDO3, LILO1, and LILO2 while disabling LDO1, LDO2, LDO4, and LDO5 - offering flexibility for mixed-signal subsystems requiring selective rail bring-up without full I²C configuration.

Availability

LP8725TLE-D/NOPB is available at Aetrix Electronics and suitable for mobile camera modules, handheld multimedia SoCs, portable navigation devices, and wireless audio transceivers requiring stable component supply and long-term production continuity.

Supply support for LP8725TLE-D/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 broad industrial and consumer design expertise.

The LP8725 series is part of TI's Power Management Unit portfolio, designed specifically for efficient, highly integrated power delivery to multimedia processors and modular subsystems in space- and performance-constrained portable electronics.

FAQ

What is the primary function of the LP8725TLE-D/NOPB in a portable electronics design?

The LP8725TLE-D/NOPB serves as a multi-rail programmable power management unit, integrating two 600-mA buck converters, five 300-mA LDOs, and two LILO regulators to supply and sequence power for multimedia processors or subsystems. Its I²C interface and configurable startup order make LP8725TLE-D/NOPB ideal for camera modules and handheld SoCs where compact size and flexible rail control are essential.

How does the CONFIG pin affect the operation of the LP8725TLE-D/NOPB?

The CONFIG pin (E2) determines whether LP8725TLE-D/NOPB operates as a SUB_PMU (CONFIG=GND) or full PMU (CONFIG=VIN1). In SUB_PMU mode, EN/PWR_ON acts as an enable signal and B2_EN controls BUCK2; in PMU mode, PWR_ON initiates sequencing and PS_HOLD maintains system power. This pin also selects the I²C slave address (e.g., 0x78 vs. 0x79), directly impacting LP8725TLE-D/NOPB system integration.

What are the default output voltages and enable states for the LP8725TLE-D/NOPB at power-on?

With DEFSEL=VIN1, LP8725TLE-D/NOPB defaults to BUCK1=1.3 V, BUCK2=1.8 V, LDO3=1.8 V, LILO1=3.0 V, and LILO2=3.0 V - all enabled - while LDO1, LDO2, LDO4, and LDO5 remain disabled. With DEFSEL=GND, the same voltages apply but LDO5 defaults to 1.2 V OFF. These settings reduce inrush current and allow selective rail activation without I²C writes, a key behavior distinguishing LP8725TLE-D/NOPB from other variants.

Does the LP8725TLE-D/NOPB support dynamic voltage scaling, and how is it implemented?

Yes, LP8725TLE-D/NOPB supports Dynamic Voltage Scaling (DVS) for BUCK1 via the dedicated DVS pin (C2) or I²C register control. When DVS=1, BUCK1 outputs the BUCK1_V1 voltage; when DVS=0, it outputs BUCK1_V2. This hardware-based DVS path enables real-time voltage adjustment synchronized with processor DVFS requests - critical for optimizing power efficiency in LP8725TLE-D/NOPB-based multimedia platforms.

What thermal protection features does the LP8725TLE-D/NOPB include, and how do they respond to overtemperature conditions?

LP8725TLE-D/NOPB incorporates thermal shutdown protection that triggers at T_SD +160°C. Upon detection, the device immediately disables all outputs and asserts RESET_N to signal fault condition to the host processor. Recovery requires cycling EN/PWR_ON or PS_HOLD - no automatic restart - ensuring safe thermal cooldown before resuming operation. This behavior is consistent across all LP8725TLE-D/NOPB operating modes and protects against sustained overload or inadequate PCB thermal design.