Vishay Siliconix SIP12116DB

Overview

SiP12116DB from Vishay Siliconix is a reference board for the SiP12116 - a 3 A, 4.5 V to 15 V input, current-mode constant-on-time (CM-COT) synchronous buck regulator with integrated high-side and low-side MOSFETs, adjustable 0.6 V–5.5 V output, and 600 kHz fixed switching frequency. It supports graphics cards, notebook computers, SSD/HDD power rails, and LCD TV point-of-load conversion.

For engineers reviewing the SiP12116DB datasheet, SiP12116DB application circuit, SiP12116DB layout guidelines, or SiP12116DB component sourcing, this evaluation platform enables rapid validation of the SiP12116's ultrafast transient response, integrated compensation, power-good signaling, and thermal performance in real-world 3 A DC/DC designs.

Technical Context

The SiP12116DB implements the SiP12116 IC in a fully assembled, tested PCB layout optimized per Vishay's recommended design rules: compact LX–PGND–VOUT loop, dedicated AGND plane separation, stacked vias under the DFN10-33C thermal pad, and strategic placement of 3×22 μF ceramic output capacitors plus 100 nF bootstrap capacitor. It validates pre-bias startup, cycle-by-cycle OCP triggering at 4.25 A (typ.), and OTP shutdown at 145 °C with 35 °C hysteresis.

This reference board demonstrates the CM-COT architecture's ability to maintain regulation with minimal external components - no ESR-dependent bulk capacitance, no external compensation network, and only RFB divider tuning required for output voltage setting. The board supports VIN = 12 V ±10 %, VOUT = 1.2 V or 3.3 V configurations, and delivers up to 95 % peak efficiency at full load.

Key Specifications

Availability

SiP12116DB is available at Aetrix Electronics and suitable for graphics card VRM validation, notebook CPU core rail prototyping, SSD power management development, and industrial embedded DC/DC subsystem qualification requiring stable component supply and traceable reference hardware.

Supply support for SiP12116DB 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

Vishay Siliconix is a global leader in discrete semiconductors and integrated power solutions, specializing in high-efficiency, high-density power conversion components with rigorous reliability testing and AEC-Q200-qualified manufacturing.

The SiP12116DB belongs to Vishay's microBUCK product line - purpose-built reference platforms for monolithic synchronous buck regulators targeting space-constrained, high-transient computing and consumer applications where fast load-step response and minimal external parts are critical.

FAQ

What is the SiP12116DB used for?

The SiP12116DB is a fully assembled evaluation board designed to accelerate development and validation of the SiP12116 synchronous buck regulator IC. It provides a proven PCB layout, bill of materials, and test points to verify 3 A load capability, PGOOD signaling, thermal performance, and transient response - eliminating layout risk during early-stage power design.

Does the SiP12116DB support adjustable output voltage?

Yes, the SiP12116DB supports adjustable output voltage via external resistor divider on the FB pin. The board ships with configurations for 1.2 V and 3.3 V outputs using Vishay-recommended RFB values (e.g., 4.53 kΩ top / 1 kΩ bottom for 3.3 V), and users can reconfigure it for any output from 0.6 V to 5.5 V per the SiP12116's feedback reference of 600 mV (typ.).

What protection features of the SiP12116 are demonstrated on the SiP12116DB?

The SiP12116DB validates all key protections of the SiP12116 IC: cycle-by-cycle overcurrent protection (OCP) triggered at ~4.25 A valley current, overtemperature shutdown at 145 °C (with 35 °C hysteresis), and input UVLO activation at ~2.8 V rising edge. These are observable via oscilloscope waveforms on PGOOD, EN, and LX pins during stress testing.

Can the SiP12116DB be used for pre-bias startup evaluation?

Yes, the SiP12116DB supports pre-bias startup evaluation. The SiP12116 IC monitors the FB pin voltage during startup; if the output is already biased above the internal ramp reference, the control logic inhibits switching to prevent negative voltage spikes. This behavior is confirmed in Fig. 11 and Fig. 14 of the SiP12116 datasheet and reproducible on the SiP12116DB with an external bias source applied to VOUT.

Is thermal performance data available for the SiP12116DB?

Yes - the SiP12116DB layout follows Vishay's thermal recommendations: exposed thermal pad soldered to a multi-layer PGND plane with ≥8 thermal vias, minimal copper resistance paths, and optimized LX loop area. Thermal impedance (R_thJA) is specified as 36.3 °C/W for the SiP12116 IC, and board-level IR thermography in the datasheet (p. 7–8) confirms junction temperature remains below 125 °C at 3 A, 12 V_IN, 85 °C ambient.