STMicroelectronics EVAL6932D1.2

Overview

EVAL6932D1.2 from STMicroelectronics is an evaluation board for the L6932D1.2 adjustable ultra-low-dropout linear regulator, designed to deliver up to 2A output current with 1.2V–5V programmable output voltage, 1% regulation accuracy, and 200mΩ typical R_DS(on). It supports input voltages from 2V to 14V and integrates enable, power-good, short-circuit protection, and thermal shutdown-targeted at mobile PC and handheld instrument power rail validation.

For engineers reviewing the EVAL6932D1.2 datasheet, EVAL6932D1.2 pinout, EVAL6932D1.2 application, or EVAL6932D1.2 equivalent, this board enables rapid characterization of L6932D1.2's load/line regulation, dropout behavior, thermal performance, and external resistor-divider stability under real-world PCB layout and transient conditions.

Technical Context

The EVAL6932D1.2 implements the full reference design for the L6932D1.2 IC, featuring dual 10µF TOKIN C34Y5U1E106Z input/output ceramic capacitors, Neohm 5.6kΩ/3.3kΩ 1% feedback resistors, and SO-8 (4+4) footprint alignment. It validates the IC's 200µA quiescent current across load and temperature, and demonstrates stable operation with low-ESR capacitors when using the recommended 1nF–10nF compensation capacitor across R1.

This board directly supports evaluation of the L6932D1.2's key functional blocks: N-channel MOSFET pass element (50mΩ typ.), error amplifier with 1.25V internal reference, open-drain PGOOD comparator (90% V_OUT threshold, 10% hysteresis), and thermal shutdown (150°C trip, 130°C release). It does not integrate DC-DC conversion circuitry-it is a dedicated LDO test platform.

Key Specifications

Availability

EVAL6932D1.2 is available at Aetrix Electronics and suitable for mobile PC power validation, handheld instrument supply testing, and chipset I/O rail qualification requiring stable component supply and documented reference design fidelity.

Supply support for EVAL6932D1.2 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer applications.

The EVAL6932D1.2 belongs to ST's power management evaluation platform family, specifically engineered to accelerate design-in of high-accuracy, low-noise linear regulators in space-constrained portable systems.

FAQ

What is the purpose of the 1nF capacitor shown in Figure 9 of the L6932 datasheet?

The 1nF capacitor placed across the upper resistor (R1) of the feedback divider compensates for loop instability caused by very low-ESR ceramic output capacitors. It introduces a controlled zero to improve phase margin, preventing oscillation-especially critical when regulating higher output voltages (e.g., >3.3V) with the L6932D1.2 adjustable version.

Can EVAL6932D1.2 be used to evaluate fixed-output variants like L6932D1.5?

No-EVAL6932D1.2 is configured exclusively for the adjustable L6932D1.2 variant, with R1/R2 pre-mounted for 1.2V output and ADJ pin routed for external programming. Fixed-output versions (L6932D1.5/L6932D1.8/L6932D2.5) require separate evaluation boards with different feedback networks and no ADJ connection.

What is the thermal resistance of the EVAL6932D1.2 demo board, and how was it measured?

The thermal resistance junction-to-ambient (R_thJA) is 62°C/W, measured on the demoboard with approximately 4 cm² of 2 oz. copper pour acting as a heatsink. This value assumes natural convection and is specified in the "Thermal Data" section of the L6932 datasheet (Rev. 9, page 2).

Does EVAL6932D1.2 include ESD protection or input surge suppression components?

No-the board implements only the minimal reference circuit per Figure 6 of the datasheet: input/output capacitors, feedback resistors, and direct IC connections. It omits TVS diodes, fuses, or series ferrites, placing responsibility for system-level robustness on the user's host design.