STMicroelectronics L6932D2.5TR

Overview

L6932D2.5TR from STMicroelectronics is a 2A ultra-low-dropout linear regulator with fixed 2.5V output, 2V–14V input range, 200mΩ R_DS(on), 1% voltage accuracy, and integrated enable and power-good functions. It delivers stable I/O supply for processors and chipsets in mobile PCs and handheld instruments.

For engineers reviewing the L6932D2.5TR datasheet, L6932D2.5TR pinout, L6932D2.5TR application, or L6932D2.5TR equivalent, key selection criteria include dropout performance at 2A, thermal behavior in SO-8 (4+4), quiescent current under light load, and PGOOD threshold hysteresis for system sequencing.

Technical Context

The L6932D2.5TR uses an internal 50mΩ N-channel MOSFET to achieve ultra-low dropout, enabling efficient 2.5V generation from inputs as low as 2V. Its error amplifier references a 1.25V bandgap and compares feedback against a precision 0.9×V_REF threshold for PGOOD assertion.

Current limiting is implemented by sensing voltage across the internal MOSFET's R_DS(on), delivering a fixed 2.5A limit with ±8% tolerance. Thermal shutdown activates at 150°C with 20°C hysteresis, and the EN pin supports logic-level control with 0.65V typical threshold.

Key Specifications

Pinout & Package

Package: SO-8 (4+4), surface-mount, 5.0mm × 4.0mm body, 1.27mm pitch, 1.65mm max height per JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with TSM108225DCQ and MCP1825-2502E/DB, the L6932D2.5TR uniquely balances wide 2–14V input compatibility, integrated PGOOD, and 200mΩ R_DS(on) - making it optimal for mobile platforms needing robust sequencing and battery-to-bus versatility.

Availability

L6932D2.5TR is available at Aetrix Electronics and suitable for motherboard power delivery, mobile PC I/O rails, and handheld instrument reference supplies requiring stable component supply and full traceability.

Supply support for L6932D2.5TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The L6932 series targets high-current, low-dropout regulation in space-constrained portable electronics, emphasizing thermal resilience, sequencing capability, and compatibility with legacy 2.5V logic families.

FAQ

What is the minimum input voltage required for 2.5V output at 2A?

The L6932D2.5TR maintains regulation down to 2V input, but at 2A load, dropout is determined by R_DS(on). With 200mΩ max, minimum input is 2.5V + (2A × 0.2Ω) = 2.9V for guaranteed 2.5V output. Below that, output drops linearly with input.

How does the PGOOD function behave during startup and fault conditions?

PGOOD asserts high only after V_OUT reaches ≥90% of 2.5V (≥2.25V) and remains high until V_OUT falls below that threshold. During short-circuit or thermal shutdown, PGOOD pulls low within microseconds, providing immediate fault indication to host controllers.

Can the L6932D2.5TR be used with ceramic output capacitors?

Yes, but caution is required: low-ESR ceramics may cause instability in the adjustable version. For the fixed 2.5V variant, 10µF X5R/X7R ceramics are validated per ST's demo board design; avoid NP0/C0G below 4.7µF due to insufficient phase margin.

What thermal derating applies when operating at 60°C ambient temperature?

With R_TH(J-A) = 62°C/W on standard demo board, maximum allowable power dissipation is (150°C − 60°C)/62°C/W = 1.45W. At 2.5V output, this limits usable input voltage to ≤3.6V for full 2A load - higher inputs require heatsinking or reduced current.