Texas Instruments LP8725TLX-D/NOPB

Overview

LP8725TLX-D/NOPB from Texas Instruments is a programmable power management unit (PMU) integrating two 600–800 mA step-down DC-DC converters, three digital LDOs (300 mA each), two analog LDOs (300 mA), and two low-input/low-output (LILO) regulators - all in a 30-bump DSBGA package. It supports dynamic voltage scaling (DVS), I²C-based register control, and configurable power-on sequencing for multimedia processors and subsystems.

For engineers reviewing the LP8725TLX-D/NOPB datasheet, LP8725TLX-D/NOPB pinout, LP8725TLX-D/NOPB application, or LP8725TLX-D/NOPB equivalent, key selection considerations include output voltage configurability across seven regulated rails, thermal shutdown protection, ±2% output accuracy, 10 µVrms analog LDO noise, and dual-mode operation (SUB_PMU or stand-alone PMU).

Technical Context

The LP8725TLX-D/NOPB implements a dual-buck architecture with 4-MHz switching frequency enabling use of compact 1-µH inductors. Its I²C-compatible serial interface allows full register access for voltage programming, startup sequence definition, and DVS control - with two default configurations selected via the DEFSEL pin.

It operates in multiple modes: STANDBY (serial interface active only), IDLE (full regulation enabled), SLEEP (ultra-low ground current), and configurable SHUTDOWN. Power sequencing is programmable in time steps of ~64 µs, with typical startup delays of 30 ms after EN/PWR_ON assertion and rail-specific enable timing per register-defined order.

Key Specifications

Pinout & Package

LP8725TLX-D/NOPB uses a 30-bump DSBGA package (0.5 mm pitch), bottom-side ball layout with five rows (A–F) and six columns (1–5), plus one additional ball at position F6. Pin functions are defined per TI SNVS618G datasheet Rev. May 2013.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP8725TLX-D/NOPB, LP8725TLX-C/NOPB offers tighter default rail activation scope but identical register programmability, while LP8725TLX-B/NOPB further reduces default active outputs - both require identical PCB layout but differ in factory-configured startup behavior and default voltage sets.

Availability

LP8725TLX-D/NOPB is available at Aetrix Electronics and suitable for smartphone application processors, tablet camera modules, portable media players, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.

Supply support for LP8725TLX-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 decades of automotive, industrial, and consumer design expertise.

The LP8725TLX-D/NOPB belongs to TI's LP87xx family of highly integrated PMUs, designed specifically for power-constrained multimedia processors and subsystems requiring multi-rail sequencing, low noise, and flexible configuration.

FAQ

What is the primary function of the LP8725TLX-D/NOPB in a system?

The LP8725TLX-D/NOPB serves as a programmable power management unit that integrates two high-efficiency buck converters, five digital LDOs, two analog LDOs, and two LILO regulators. Its primary function is to deliver precisely sequenced, low-noise, and dynamically scalable power to multimedia processors and their associated subsystems - such as camera modules or audio codecs - while minimizing external component count and PCB area.

How does the CONFIG pin affect the operation of the LP8725TLX-D/NOPB?

The CONFIG pin on the LP8725TLX-D/NOPB determines its system role: when tied to GND, it configures the device as a SUB_PMU for peripheral modules (e.g., camera), assigning B2_EN and EN functions; when tied to VIN1, it configures it as a stand-alone PMU for main processors, assigning PS_HOLD and PWR_ON functions. This hardware-selectable mode defines pin behavior, slave I²C addresses, and power-up timing - no firmware change required.

Can the LP8725TLX-D/NOPB support dynamic voltage scaling for processor cores?

Yes, the LP8725TLX-D/NOPB supports dynamic voltage scaling (DVS) for BUCK1 via both register control and the dedicated DVS pin. When DVS=1, BUCK1 outputs BUCK1_V1; when DVS=0, it outputs BUCK1_V2 - enabling real-time voltage adjustment during processor DVFS transitions. This feature is fully supported in both SUB_PMU and PMU configurations and requires no external circuitry beyond the DVS control signal.

What protection features are built into the LP8725TLX-D/NOPB?

The LP8725TLX-D/NOPB includes thermal shutdown protection (triggering at TSD+160°C), undervoltage lockout (UVLO), and fault detection that asserts RESET_N upon BUCK or LDO output short-circuit or overcurrent - provided the respective outputs are not masked in configuration registers. These protections operate independently of I²C communication and remain active in all operational modes including STANDBY and SLEEP.

Is the LP8725TLX-D/NOPB pin-compatible with other variants like LP8725TLX-B/NOPB?

No, the LP8725TLX-D/NOPB is not pin-compatible with LP8725TLX-B/NOPB or other LP8725 variants. While all share the same 30-bump DSBGA package and mechanical footprint, their default power-up behavior, register defaults, and factory-programmed startup sequences differ significantly - e.g., LP8725TLX-D/NOPB enables LDO3 and LILO1/LILO2 by default, whereas LP8725TLX-B/NOPB disables them. PCB design must match the exact variant's functional expectations.