Monolithic Power Systems Inc. EV5611-QT-00A

Overview

EV5611-QT-00A from Monolithic Power Systems is an evaluation board for the MP5611 triple-output AMOLED display power supply IC, supporting 2.9V–5.2V input and generating AVDD (5.8V/100mA), ELVDD (4.6V/500mA), and ELVSS (−4V/500mA) outputs with one-wire digital voltage programming, independent enable control, and fast discharge. It targets compact smartphone display power design.

For engineers reviewing the EV5611-QT-00A datasheet, EV5611-QT-00A pinout, EV5611-QT-00A application, or EV5611-QT-00A equivalent, this board enables rapid validation of MP5611's triple-rail startup sequencing, OCP threshold configuration via CTRL pin pulses, and fast discharge behavior under system disable conditions.

Technical Context

The EV5611-QT-00A implements a complete reference design for the MP5611GQT TQFN-16 IC, integrating three switching regulators: a boost for AVDD, a boost for ELVDD, and an inverting buck-boost for ELVSS. All outputs support programmable voltage levels and over-current protection thresholds via one-wire digital protocol on the CTRL pin.

It provides dedicated EN_AVDD and CTRL pins for independent AVDD/ELVDD–ELVSS enable control, plus FD pin for active fast discharge. The board includes all required passives-11×10µF ceramic output caps, 2×4.7µH and 1×10µH shielded inductors, and precision feedback resistors-to achieve stable regulation per MP5611's spec limits.

Key Specifications

Availability

EV5611-QT-00A is available at Aetrix Electronics and suitable for AMOLED smartphone development, wearable display prototyping, and embedded display subsystem qualification requiring stable component supply and validated reference design fidelity.

Supply support for EV5611-QT-00A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with core expertise in DC/DC conversion, LED drivers, and display power solutions.

The EV5611-QT-00A belongs to MPS's AMOLED Display Power Evaluation Platform product line, designed to accelerate adoption of their integrated triple-output power ICs in space-constrained mobile and portable display applications.

FAQ

What is the primary function of the EV5611-QT-00A?

The EV5611-QT-00A is a fully assembled evaluation board for the MP5611 triple-output AMOLED power supply IC. It provides hardware validation of AVDD, ELVDD, and ELVSS generation, one-wire voltage/OCP programming, independent enable sequencing, and fast discharge functionality under real-world load and input conditions.

How is output voltage configured on this board?

Voltage configuration uses the one-wire digital interface on the CTRL pin: applying specific numbers of logic-high pulses (per MP5611 datasheet Table 3) sets ELVSS (−1.4V to −6.4V), ELVDD (4.6V to 5.2V), and AVDD (5.0V to 7.7V) with 10mV resolution. Default values are −4V, 4.6V, and 5.8V respectively.

Which pins control power sequencing?

EN_AVDD enables only the AVDD output; CTRL enables both ELVDD and ELVSS outputs; FD enables active fast discharge across all three rails. These pins allow precise, independent timing control of power-up and power-down sequences critical for OLED panel reliability.

Does the board include all necessary external components?

Yes - the EV5611-QT-00A integrates all required components: 11×10µF X7R ceramic output capacitors (Murata GRM21BR71A106KE51L), 2×4.7µH and 1×10µH shielded inductors (MPS MPL-SE4030-4R7 and Toko D63LCB-#A921CY-100M=P3), and precision feedback resistors, eliminating need for additional parts during initial evaluation.

What protections are demonstrated on this board?

The board demonstrates MP5611's full protection suite: VIN UVLO (2.7V typ.), cycle-by-cycle current limit, thermal shutdown (>150°C), short-to-GND protection on all outputs, and programmable OCP on AVDD (90–270mA) and ELVDD (80–650mA), verified under loaded transient conditions.

Can this board be used for production-level testing?

Yes - the EV5611-QT-00A uses production-grade MP5611GQT ICs in TQFN-16 packages and follows MPS-recommended layout practices (including thermal vias, ground plane integrity, and component placement). It supports functional, parametric, and stress testing aligned with final system requirements.