Texas Instruments LP8725TLX-A/NOPB

Overview

LP8725TLX-A/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 (LILO) regulators - all managed via I²C interface for dynamic voltage scaling and configurable power-on sequencing in multimedia processor subsystems.

For engineers reviewing the LP8725TLX-A/NOPB datasheet, LP8725TLX-A/NOPB pinout, LP8725TLX-A/NOPB application, or LP8725TLX-A/NOPB equivalent, key selection criteria include its 30-bump DSBGA package (0.5 mm pitch), ±2% output voltage accuracy across buck and LDO rails, 10 μV_rms analog LDO noise, thermal shutdown protection, and support for SUB_PMU or stand-alone PMU configurations via CONFIG pin wiring.

Technical Context

The LP8725TLX-A/NOPB implements dual synchronous buck converters operating at 4 MHz with small 1-µH inductors, enabling compact high-efficiency power delivery. Its I²C-compatible serial interface allows full register control of output voltages, startup/shutdown sequences, and Dynamic Voltage Scaling (DVS) for BUCK1 using external DVS pin or register bit.

It supports two distinct operational modes: SUB_PMU (CONFIG=GND) with EN/PWR_ON control and automatic STANDBY entry, and PMU mode (CONFIG=VIN1) with PS_HOLD and PWR_ON sequencing. Power-on reset initializes registers per DEFSEL configuration (VIN1 or GND), defining default voltages and startup order across 12 regulated outputs.

Key Specifications

Pinout & Package

LP8725TLX-A/NOPB uses a 30-bump DSBGA package (0.5 mm pitch) with bottom-side ball layout. Pin functions are defined by physical location and CONFIG/DEFSEL wiring; no internal multiplexing alters terminal roles across variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP8725TLX-A/NOPB, LP8725-A/NOPB delays buck activation until software intervention, while LP8725-C/NOPB removes DEFSEL dependency entirely - offering trade-offs between flexibility, safety, and simplicity in production firmware flow.

Availability

LP8725TLX-A/NOPB is available at Aetrix Electronics and suitable for mobile multimedia processors, camera subsystems, and portable handheld products requiring stable component supply with long-term lifecycle assurance.

Supply support for LP8725TLX-A/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 for high-reliability applications.

The LP8725TLX-A/NOPB belongs to TI's integrated PMU product line, engineered specifically for power-constrained multimedia and portable systems requiring multi-rail sequencing, low noise, and flexible configuration without external components.

FAQ

What is the package type and pin count of the LP8725TLX-A/NOPB?

The LP8725TLX-A/NOPB uses a 30-bump DSBGA package with 0.5 mm ball pitch. It has 30 terminals arranged in a 5×6 grid on the bottom side, as confirmed in the official TI SNVS618G datasheet connection diagrams and pin descriptions. This compact package supports high-density portable PCB layouts while maintaining thermal performance through exposed die pad contact.

How does the CONFIG pin determine LP8725TLX-A/NOPB operating mode?

The CONFIG pin (E2) sets LP8725TLX-A/NOPB into either SUB_PMU mode (CONFIG=GND) or PMU mode (CONFIG=VIN1). In SUB_PMU mode, EN/PWR_ON acts as the enable trigger and the device enters STANDBY automatically when disabled. In PMU mode, PWR_ON initiates power-up and PS_HOLD sustains operation - enabling full SoC-level power control without host processor intervention during boot.

What are the default output voltages for LP8725TLX-A/NOPB when DEFSEL = VIN1?

When DEFSEL is tied to VIN1, LP8725TLX-A/NOPB defaults to Setup 1: BUCK1 = 1.0 V / 1.2 V (DVS-selectable), BUCK2 = 1.8 V, LDO1 = 2.8 V, LDO2 = 1.8 V, LDO3 = 3.3 V, LDO4 = 3.3 V, LDO5 = 2.8 V, LILO1 = 1.2 V, and LILO2 = 1.2 V - all enabled at power-on. These values are specified in Table 3 of the SNVS618G datasheet.

Does LP8725TLX-A/NOPB support dynamic voltage scaling, and how is it implemented?

Yes, LP8725TLX-A/NOPB supports Dynamic Voltage Scaling (DVS) for BUCK1 via both register control (REG 0x00<2>) and the dedicated DVS pin (C2). When DVS=1, BUCK1 outputs the V1 voltage; when DVS=0, it outputs V2. The external DVS pin allows hardware-level real-time voltage switching synchronized with processor frequency changes - critical for energy-efficient multimedia workloads.

What protection features are integrated into the LP8725TLX-A/NOPB?

LP8725TLX-A/NOPB integrates thermal shutdown (>125°C), undervoltage lockout (UVLO), and fault detection that asserts RESET_N if BUCK1, BUCK2, or LDO1 is shorted or pulled low. It also includes active pull-down on FB1/FB2 during disable and internal 500 kΩ pull-down resistors on EN, B2_EN, and LDO3_EN pins - ensuring predictable behavior during power transitions and system resets.