Monolithic Power Systems Inc. EV2141N-TF-00A

Overview

EV2141N-TF-00A from Monolithic Power Systems is a 1A synchronous step-down DC/DC converter with 11µA quiescent current, 2.2MHz switching frequency, and 2.3V–5.5V input range. It delivers fixed 1.2V output in a tiny SOT-23-6 package and integrates 120mΩ high-side and 80mΩ low-side MOSFETs for high efficiency in space-constrained battery-powered systems.

For engineers reviewing the EV2141N-TF-00A datasheet, EV2141N-TF-00A pinout, EV2141N-TF-00A application, or EV2141N-TF-00A equivalent, key selection criteria include ultra-low I_Q, fixed-output simplicity, thermal shutdown behavior, EN-controlled sequencing, and compatibility with low-ESR ceramic output capacitors in portable power rails.

Technical Context

The EV2141N-TF-00A implements a Constant-On-Time (COT) control architecture enabling fast load-transient response without external compensation. Its internal power stage supports 100% duty cycle operation for dropout conditions and includes hiccup-mode short-circuit protection.

It features an enable (EN) pin for precise power sequencing and a dedicated Power Good (PG) signal indicating regulated output status-both critical for multi-rail embedded systems requiring deterministic startup timing and fault reporting.

Key Specifications

Pinout & Package

EV2141N-TF-00A is housed in a thermally enhanced SOT-23-6 package (2.9mm × 2.8mm × 1.3mm), with exposed pad for improved heat dissipation in compact PCB layouts.

Key Features

Applications

Availability

EV2141N-TF-00A is available at Aetrix Electronics and suitable for wireless networking cards, portable medical sensors, and industrial handheld scanners requiring stable component supply across production lifecycles.

Supply support for EV2141N-TF-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 over two decades of leadership in DC/DC conversion and motor control solutions.

The MP2141 series targets ultra-low-power, space-constrained applications such as wearables, IoT edge nodes, and portable instrumentation-emphasizing minimal external components, robust protection, and seamless integration into multi-rail power architectures.

FAQ

What is the function of the PG pin on EV2141N-TF-00A?

The PG (Power Good) pin is an open-drain output that goes high when the regulated 1.2V output is within ±7.5% tolerance. It sinks ≤10µA when asserted and requires an external pull-up resistor (typically 10kΩ to VCC). This signal enables system-level power sequencing and fault detection in multi-rail designs.

Can EV2141N-TF-00A operate with input voltage below 2.3V?

No. The absolute minimum input voltage is 2.3V per the datasheet. Operation below this threshold disables regulation and may cause uncontrolled dropout or latch-up. For sub-2.3V inputs, consider the MP2151 (1.8V–5.5V range) or MP2161 (0.9V–5.5V with external bias).

Does EV2141N-TF-00A require external feedback resistors?

No. EV2141N-TF-00A is the fixed 1.2V output variant and contains internal resistor divider network. External feedback resistors are only required for adjustable versions like MP2141NGTF (0.6V–5.5V programmable via R1/R2).

What thermal derating applies at 1A load in SOT-23-6 package?

At 25°C ambient and 1A load with 2-layer PCB (2oz Cu, 1in² copper pour under EPAD), junction temperature rise is ~45°C. Derating begins above 85°C ambient; full 1A output is guaranteed up to 85°C case temperature with proper thermal layout per MPS AN-107.

Is the EN pin internally pulled down?

Yes. The EN pin has an internal 1.2MΩ pull-down resistor to GND. A logic-high signal ≥1.2V is required to enable the device. This ensures default-disabled state during power-up and prevents unintended start-up in noisy environments.

How does hiccup-mode protection behave during sustained short circuit?

Upon short-circuit detection, EV2141N-TF-00A enters hiccup mode: it shuts down for ~35ms, then attempts restart. If fault persists, it repeats the cycle. This limits average power dissipation to <150mW, preventing thermal damage while maintaining automatic recovery capability.