STMicroelectronics E-L6932D1.8

Overview

E-L6932D1.8 from STMicroelectronics is a 2A ultra-low-dropout linear regulator in SO-8 (4+4) package, delivering fixed 1.8V output with ±1% regulation accuracy across 2V–14V input range. It features 200mΩ max R_DS(on), 200µA quiescent current, short-circuit protection, thermal shutdown at 150°C, and integrated Power Good and Enable functions-used for chipset and RAM supply in mobile PCs and handheld instruments.

For engineers reviewing the E-L6932D1.8 datasheet, E-L6932D1.8 pinout, E-L6932D1.8 application, or E-L6932D1.8 equivalent, key selection criteria include dropout voltage under 2A load, thermal resistance (62°C/W), PGOOD threshold (90% V_OUT), EN logic compatibility, and SO-8 (4+4) layout constraints for high-density PCBs.

Technical Context

The L6932D1.8 integrates an internal 50mΩ N-channel MOSFET to achieve ultra-low dropout operation, enabling efficient 2.5V-to-1.8V conversion at 2A in portable systems. Its error amplifier references a stable 1.25V bandgap and drives the pass transistor via a charge pump, supporting fast transient response and tight line/load regulation (≤5mV/15mV respectively).

Power management is implemented through dual-stage protection: current limiting at 2.3–2.7A (±8%) sensed directly across the MOSFET, and thermal shutdown with 20°C hysteresis. The open-drain PGOOD pin asserts low when V_OUT falls below 90% of nominal, providing system-level power sequencing feedback.

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. Thermal resistance junction-to-ambient is 62°C/W on demo board (4 cm² copper area).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and NCP1117ST18T3G, E-L6932D1.8 uniquely combines 2A output, ±1% accuracy, integrated EN/PGOOD, and ultra-low R_DS(on) in a single SO-8 (4+4) footprint-making it optimal for space-constrained, high-current, sequenced power domains in mobile computing platforms.

Availability

E-L6932D1.8 is available at Aetrix Electronics and suitable for mobile PC core supply, PCMCIA card power, and motherboard memory termination requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for E-L6932D1.8 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, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components since 1987.

The L6932 series was developed specifically for high-current, low-dropout point-of-load regulation in portable and embedded computing systems-emphasizing thermal efficiency, integration of power sequencing functions, and robustness in battery-powered environments.

FAQ

What is the minimum input voltage required for E-L6932D1.8 to maintain regulation at 2A?

The minimum input voltage is 2.0V, but practical dropout at 2A depends on R_DS(on). With 200mΩ max R_DS(on), dropout is ≤400mV at 2A, so Vin ≥ 2.2V ensures regulation. At 1.8V output, 2.2V input yields only 400mV headroom-designers must verify thermal limits using Z_THJA = 62°C/W and ambient temperature.

Can E-L6932D1.8 be used in adjustable mode?

No-E-L6932D1.8 is the fixed 1.8V variant. Only the L6932D1.2 version supports adjustment from 1.2V to 5V via external resistors on the ADJ pin. Using E-L6932D1.8 with external feedback risks instability and violates the fixed-output design; the ADJ pin must remain unconnected or grounded per datasheet guidelines.

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

PGOOD is an open-drain output that remains high-impedance until V_OUT reaches 90% of 1.8V (≥1.62V), then pulls low only if V_OUT drops below that threshold. During startup, it transitions from high-Z to active-low only after valid regulation is achieved; during overcurrent or thermal shutdown, it asserts low within microseconds to signal fault condition to host controllers.

What PCB layout practices are critical for thermal performance of E-L6932D1.8?

Four GND pins (5–8) must connect to a solid internal or bottom-layer ground plane with multiple vias (≥6 per pin) to minimize thermal resistance. The IN and OUT pads require ≥10mm² copper area each; thermal pad under the package (if present) should be soldered and thermally stitched to inner ground layers. Avoid narrow traces-use ≥0.5mm width for all high-current paths.