Monolithic Power Systems Inc. EVL2193-C-00B

Overview

EVL2193-C-00B from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2193 synchronous step-down converter, a monolithic DC/DC regulator with integrated MOSFETs, 2.5V–5.5V input range, 3A continuous output current, 1.1MHz switching frequency, and 25µA quiescent current in WLCSP-6 package. It supports adjustable output down to 0.6V and features constant-on-time (COT) control for fast transient response.

For engineers reviewing the EVL2193-C-00B datasheet, EVL2193-C-00B schematic, EVL2193-C-00B test results, or EVL2193-C-00B bill of materials, this board enables rapid validation of MP2193 performance in low-voltage, high-efficiency power delivery for portable and space-constrained applications.

Technical Context

The EVL2193-C-00B implements the MP2193 IC in a fully assembled, tested layout with optimized component selection-including MPS MPL-AL4020-1R0 inductor and 22µF X5R ceramic capacitors-to achieve stable 1.2V/3A output at 82.7% typical efficiency (5V_IN, 1.2V_OUT). COT control eliminates external compensation and ensures robust regulation across line and load variations.

Board-level design includes EN pin control, FB voltage divider (R1/R2/R3), thermal-aware PCB stack-up, and accessible test points for VIN, VOUT, SW, and GND. Shutdown current is measured at <1µA when EN = 0V, and UVLO thresholds are characterized over –60°C to +100°C.

Key Specifications

Availability

EVL2193-C-00B is available at Aetrix Electronics and suitable for portable medical devices, wearable sensors, battery-powered microcontrollers, and low-power industrial controllers requiring stable component supply and rapid power architecture validation.

Supply support for EVL2193-C-00B 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 expertise in DC/DC conversion, LED drivers, and motor control solutions since 1997.

The MP2193 product line targets ultra-small, high-efficiency buck converters for space- and power-constrained applications such as wearables, hearables, and compact IoT edge nodes-emphasizing low IQ, fast transient response, and minimal external component count.

FAQ

What is the default output voltage of the EVL2193-C-00B?

The board is configured for 1.2V output by default using R1 = 100kΩ and R2 = R3 = 200kΩ in the feedback divider. This setting complies with common processor core voltage requirements and can be recalculated using V_OUT = 0.6V × (1 + R2/R3) for other values.

Can the EVL2193-C-00B operate below 2.5V input?

No. The MP2193 IC has a minimum input voltage of 2.5V per its datasheet specification. Operation below this threshold may cause UVLO activation or unregulated output. For sub-2.5V applications, alternative regulators like MP2153 or MP2172 should be evaluated.

Is the EN pin actively driven or pulled up on the board?

The EN pin is pulled high to VIN through a 100kΩ resistor (not shown in schematic but confirmed in BOM and layout files), enabling automatic startup when input is applied. A test point allows external TTL-level control for sequencing verification.

What inductor is used, and why is it critical?

The board uses MPS MPL-AL4020-1R0 (1.0µH, 8.6A saturation current, 11mΩ DCR). Its low DCR minimizes conduction loss, while the ISAT rating ensures no core saturation at 3A peak current, preserving COT loop stability and efficiency.

Does the board include input/output capacitors rated for full 3A ripple current?

Yes. Two 22µF/10V X5R 0805 ceramics (Murata GRM21BR61A226ME51L) are placed at both input and output. Their combined ESR and ESL meet MP2193's COT stability requirements and handle RMS ripple current up to 1.5A without exceeding temperature limits.

How is thermal performance validated on this board?

Thermal imaging and ambient derating curves (Figure 7) confirm ≤40°C case rise at 3A/5V_IN/1.2V_OUT. The 4-layer PCB uses internal copper planes and thermal vias under U1 to dissipate heat from the WLCSP-6 package, supporting continuous operation up to 85°C ambient.