STMicroelectronics E-L6932D1.2TR

Overview

E-L6932D1.2TR from STMicroelectronics is an adjustable ultra-low-dropout linear regulator delivering up to 2A output current with 1.2V to 5V programmable output, 200mΩ R_DS(on), 200µA quiescent current, and ±1% voltage regulation accuracy over load and temperature - used in mobile PC I/O rail generation and chipset supply.

For engineers reviewing the E-L6932D1.2TR datasheet, E-L6932D1.2TR pinout, E-L6932D1.2TR application, or E-L6932D1.2TR equivalent, key selection criteria include dropout performance at 2A, thermal shutdown hysteresis (20°C), PGOOD open-drain threshold (90% V_OUT), EN logic compatibility, and SO-8 (4+4) layout constraints for high-density portable designs.

Technical Context

The L6932D1.2TR integrates a 50mΩ N-channel MOSFET pass element and precision 1.25V reference to enable low-dropout operation down to (V_IN – V_OUT) = 0.3V at 2A. Its error amplifier drives the MOSFET gate via charge pump, supporting stable regulation across 2V–14V input while maintaining 5mV line regulation and 15mV load regulation.

Internal protection includes foldback current limiting (2.3–2.7A), thermal shutdown at 150°C with 20°C hysteresis, and open-drain PGOOD monitoring with 10% hysteresis. The ADJ pin enables precise external resistor-divider programming of V_OUT, while EN provides logic-level on/off control referenced to VIN.

Key Specifications

Pinout & Package

Package: SO-8 (4+4), surface-mount, 1.27mm pitch, 5.0mm × 4.0mm body, 1.75mm max height per JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable LDO regulator applications.

Compared with TPS7A4700RGWR and ADM7172ACPZ-R7, the E-L6932D1.2TR uniquely combines 14V input tolerance, 2A output, PGOOD, EN, and thermal hysteresis in SO-8 - making it optimal for ruggedized portable digital systems requiring full-feature LDO control.

Availability

E-L6932D1.2TR is available at Aetrix Electronics and suitable for mobile PC I/O rail supply, handheld instrument core logic, and chipset voltage regulation requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for E-L6932D1.2TR 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, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

The L6932 series targets portable and space-constrained applications requiring high-current, low-dropout linear regulation with integrated protection - specifically engineered for mobile computing, handheld instrumentation, and embedded motherboard power domains.

FAQ

What is the minimum input voltage required for 1.2V output at 2A?

The L6932D1.2TR achieves 1.2V output at 2A with as little as 1.5V input due to its ultra-low R_DS(on) of 200mΩ, resulting in only ~300mV dropout. However, the absolute minimum specified input is 2V per datasheet - below which regulation and protection features are not guaranteed. For reliable 2A operation, maintain VIN ≥ (1.2V + 0.3V) = 1.5V, but design with VIN ≥ 2V to ensure full specification compliance.

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

The PGOOD pin is an open-drain output that remains high-impedance until V_OUT reaches 90% of its programmed value, then pulls low if V_OUT drops below that threshold. During startup, it asserts after regulation is established (typically within tens of microseconds). Under short-circuit or thermal shutdown, PGOOD goes low immediately - providing real-time fault signaling without external circuitry for system monitoring or sequencing logic.

Can the L6932D1.2TR be used with ceramic output capacitors?

Yes, but with caution: multilayer ceramic capacitors (MLCCs) offer low ESR but can cause instability in the L6932D1.2TR's feedback loop, especially at higher output voltages (>3.3V). To ensure stability, add a 1nF–10nF capacitor in parallel with the upper resistor (R1) of the ADJ divider, as recommended in ST's application note. Tantalum or polymer capacitors (10µF, low-ESR) are preferred for unconditional stability in most designs.

What is the thermal performance limitation in continuous 2A operation?

With the SO-8 (4+4) package on a standard 2oz copper demo board (R_THJA ≈ 62°C/W), continuous 2A operation is only feasible when (V_IN – V_OUT) ≤ 0.75V - e.g., 3.3V→2.5V (0.8V drop → 1.6W dissipation → ΔT = 99°C → T_J = 159°C exceeds limit). For safe 2A DC use, keep dropout ≤ 0.6V or enhance PCB copper area/thermal vias to reduce R_THJA below 40°C/W.