STMicroelectronics L6932D1.2

Overview

L6932D1.2 from STMicroelectronics is an adjustable ultra-low-dropout linear regulator delivering up to 2A output current with 1.2V to 5V programmable output, 200mΩ typical R_DS(on), 1% voltage accuracy, and operation from 2V to 14V input. It integrates an internal N-channel MOSFET, enable control, power-good monitoring, thermal shutdown, and short-circuit protection-designed for I/O and core supply in mobile PC and handheld instrument power rails.

For engineers reviewing the L6932D1.2 datasheet, L6932D1.2 pinout, L6932D1.2 application, or L6932D1.2 equivalent, this page provides verified technical context, SO-8 (4+4) package mapping, load/line regulation performance, thermal impedance data, and design-meaning specifications for low-noise, high-accuracy DC-DC conversion in space-constrained portable systems.

Technical Context

The L6932D1.2 uses an internal 50mΩ N-channel MOSFET as the pass element, enabling dropout voltages as low as (V_OUT − V_IN) = 150mV at 2A for V_OUT = 1.2V. Its error amplifier references a stable 1.25V internal bandgap and compares feedback from the ADJ pin via external resistor divider to regulate output precisely.

Power-good detection is implemented with an open-drain output that asserts low when V_OUT falls below 90% of the programmed value, with 10% hysteresis. Thermal shutdown activates at 150°C junction temperature with 20°C hysteresis, and current limiting is fixed at 2.5A ±8%, sensed directly across the MOSFET's R_DS(on).

Key Specifications

Pinout & Package

Package: SO-8 (4+4), surface-mount, 5.0mm × 4.0mm body, 1.27mm pitch, 1.75mm max height. Thermal resistance R_thJA = 62°C/W on demo board with 4 cm² copper area.

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 L6932D1.2 uniquely balances 2A output, 1.2V–5V adjustability, SO-8 thermal performance, and integrated PGOOD/EN-making it optimal for compact, multi-rail portable power designs where flexibility and current capability are primary constraints.

Availability

L6932D1.2 is available at Aetrix Electronics and suitable for mobile PC motherboard power delivery, handheld instrument analog subsystems, and PCMCIA interface regulation requiring stable component supply across extended product lifecycles.

Supply support for L6932D1.2 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 analog, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

The L6932 series belongs to ST's high-performance linear regulator product line, engineered specifically for low-dropout, high-current portable applications where thermal efficiency, accuracy, and integration of enable/power-good functions are critical.

FAQ

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

The L6932D1.2 achieves ultra-low dropout: at 2A load and 25°C, V_IN(MIN) = V_OUT + (I_OUT × R_DS(on)) ≈ 1.2V + (2A × 0.2Ω) = 1.6V. However, the absolute minimum specified operating input is 2V per datasheet-ensuring guaranteed regulation, thermal margin, and stability across temperature and process variation.

Can ceramic capacitors be used on the output without instability?

Yes, but with caution: multilayer ceramic capacitors (MLCCs) introduce a zero in the control loop via ESR×C_OUT. For high-output-voltage settings (e.g., >3.3V), low-ESR MLCCs may cause oscillation. The datasheet recommends adding a 1nF–10nF capacitor in parallel with the upper resistor (R1) of the ADJ divider to restore phase margin.

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 its target value, then pulls low only if V_OUT drops below that threshold. During startup, it transitions from high-Z to active-low only after regulation is established-providing clean power-valid signaling for sequenced system boot.

Is the L6932D1.2 RoHS-compliant and halogen-free?

Yes-per STMicroelectronics' official product change notification (PCN) and packaging data sheet, the L6932D1.2 in SO-8 package is RoHS-compliant (2011/65/EU) and halogen-free (IEC 61249-2-21), with lead-free matte tin terminations and compliant molding compound.