Monolithic Power Systems Inc. EV1530-Q-00A

Overview

EV1530-Q-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP1530 triple-output DC/DC converter for TFT LCD bias generation, delivering +13V@350mA (VMAIN), +27V@20mA (VGH), and –8.5V@20mA (VGL) from a 2.7–5.5V input, with internal power-on sequencing, 1.4MHz fixed-frequency step-up, and charge-pump–driven linear regulators.

For engineers reviewing the EV1530-Q-00A datasheet, EV1530-Q-00A pinout, EV1530-Q-00A application, or EV1530-Q-00A equivalent, this board enables rapid validation of TFT panel power architecture, output voltage adjustability via external resistor dividers, RDY flag monitoring, EN-controlled enable/disable, and thermal/overcurrent protection behavior under real load conditions.

Technical Context

The EV1530-Q-00A implements a fixed-frequency 1.4MHz boost converter driving both a positive linear regulator (VGH) and a negative linear regulator (VGL) via a charge pump powered from the SW node. Output voltages are set by external resistor dividers referenced to 1.25V FB pins (FB1/FB2/FB3), with independent feedback paths for each rail.

Power sequencing is fully internal: VMAIN powers up first, followed by VGH and VGL in controlled order; shutdown follows reverse sequence. The RDY pin asserts low only after all three outputs reach ≥80% of target, and toggles high within ~15µs upon fault detection, triggering full shutdown after ~6ms if unresolved (CT = 10nF).

Key Specifications

Availability

EV1530-Q-00A is available at Aetrix Electronics and suitable for TFT LCD display development, portable DVD player power validation, and car navigation display prototyping requiring stable component supply, quick-turn evaluation, and reference design traceability.

Supply support for EV1530-Q-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 analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP1530 product line targets TFT-LCD bias power applications, integrating step-up, charge-pump, and linear regulation in one QFN16 package to eliminate discrete bias generator complexity in space-constrained portable displays.

FAQ

What is the purpose of the RDY pin on the EV1530-Q-00A?

The RDY pin is an open-drain status indicator that goes low only after VMAIN, VGH, and VGL all reach ≥80% of their target voltages. It transitions high within ~15µs upon detection of any output fault and triggers full chip shutdown after ~6ms if the fault persists (with CT = 10nF). It is not a power-good signal but a fault-aware sequencing monitor.

Can output voltages be adjusted, and how?

Yes - VMAIN, VGH, and VGL are adjustable via external resistor dividers on FB1, FB2, and FB3. Each uses a 1.25V internal reference. Formulas for R6 (VMAIN), R8 (VGH), and R4 (VGL) are provided in the Quick Start Guide. Resistor values (e.g., R7/R9/R5 = 10kΩ–50kΩ) directly set feedback ratios and thus output levels.

What is the role of the charge pump in this evaluation board?

The charge pump is not a standalone IC but an internal circuit driven by the MP1530's switch node (SW). It generates the higher-voltage rail for the positive linear regulator (VGH) and the inverted rail for the negative linear regulator (VGL), eliminating need for external charge-pump ICs while maintaining tight regulation and sequencing control.

Does the board support automatic startup, and how is enable controlled?

Yes - automatic startup is enabled by default via pull-up resistor R1 on the EN pin. To disable the MP1530, connect EN to GND. No external logic is required for basic operation; EN provides simple hardware-level on/off control synchronized with internal soft-start and sequencing.

What protection features are implemented on this board?

The board inherits MP1530's built-in protections: cycle-by-cycle overcurrent limiting (2.8A switch current limit), thermal shutdown, under-voltage lockout (UVLO), and fault-timed shutdown triggered by RDY behavior. No external protection components are needed - all functions are integrated into the MP1530DQ IC.

Is the EV1530-Q-00A compatible with other MP1530 variants?

Yes - the board is designed specifically for the MP1530DQ (QFN16, 3×3mm), and all schematics, layout, and BOM references match that variant. Other MP1530 packages (e.g., SOIC) are not supported due to footprint and thermal interface differences; mechanical and electrical integration is validated only for the DQ version.