Monolithic Power Systems Inc. MP2141NGTF-15-Z

Overview

MP2141NGTF-15-Z from Monolithic Power Systems is a fixed-output 1.5V, 1A synchronous step-down DC/DC converter in SOT563 package, featuring 11µA quiescent current, 2.2MHz switching frequency, and constant-on-time control for fast transient response in battery-powered systems. It integrates 120mΩ P-channel and 80mΩ N-channel MOSFETs, supports 2.3V–5.5V input, and delivers regulated output with hiccup-mode short-circuit protection.

For engineers reviewing the MP2141NGTF-15-Z datasheet, MP2141NGTF-15-Z pinout, MP2141NGTF-15-Z application, or MP2141NGTF-15-Z equivalent, key selection criteria include fixed 1.5V output accuracy (±1% over temperature), power-good signaling, output discharge during shutdown, thermal shutdown at 160°C, and compatibility with low-ESR ceramic capacitors without external compensation.

Technical Context

The MP2141NGTF-15-Z uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 2.2MHz switching across its 2.3V–5.5V input range. Its internal power stage integrates complementary P/N-MOSFETs with on-resistances of 120mΩ/80mΩ, enabling high efficiency in light-load sleep mode and full-load CCM operation.

It implements advanced asynchronous modulation (AAM) with zero-current detection (ZCD) for seamless DCM operation at light loads, and includes dedicated PG (power-good) open-drain output with 90%/85% trip thresholds and 70µs delay-exclusive to fixed-output variants like this part.

Key Specifications

Pinout & Package

SOT563 package: ultra-small 1.6mm × 1.6mm × 0.55mm, 6-pin, lead-free, halogen-free, RoHS-compliant surface-mount package with exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output synchronous buck converter applications.

Compared with MP2141NGTF-15-Z, the TPS62231DRYR trades PG functionality and ultra-low IQ for higher frequency, while the ADP2301ARMZ-1.5-R7 sacrifices current capability, package size, and advanced protection features for legacy SOIC compatibility and simpler thermal management.

Availability

MP2141NGTF-15-Z is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, and low-power industrial controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP2141NGTF-15-Z 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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2141N product line targets ultra-low-power, space-constrained DC/DC conversion in battery-powered and energy-harvesting systems, emphasizing minimal quiescent current, small-footprint packaging, and integrated protection.

FAQ

What is the purpose of the PG pin on MP2141NGTF-15-Z?

The PG (Power Good) pin is an open-drain output that signals when the 1.5V output is within regulation (85–90% of nominal). It requires an external pull-up resistor to VIN and drives low when VOUT drops outside this window, enabling system-level power sequencing or reset generation without additional monitoring circuitry.

Does MP2141NGTF-15-Z require external feedback resistors?

No. Unlike the adjustable MP2141NGTF variant, the MP2141NGTF-15-Z has factory-trimmed internal feedback for fixed 1.5V output. The FB pin is repurposed as PG in this version, eliminating the need for external resistor dividers and reducing BOM count and layout complexity.

How does the output discharge function operate?

When the EN pin is pulled low or left floating, the MP2141NGTF-15-Z activates an internal discharge MOSFET between OUT and GND. This provides a 1kΩ discharge path (typical), rapidly collapsing the output voltage to prevent residual charge from interfering with downstream power sequencing or causing latch-up in connected logic.

Can MP2141NGTF-15-Z operate with input voltage below 2.3V?

No. The absolute minimum operating input voltage is 2.3V per datasheet specifications. Below this, the under-voltage lockout (UVLO) circuit disables the device. At 2.3V input, it can sustain 1.5V output only if load current is reduced to maintain sufficient headroom across the internal MOSFETs' R_DS(ON).

Is thermal derating required for continuous 1A operation in SOT563?

Yes. In still-air conditions on a standard 2-layer PCB, full 1A output requires thermal derating above ~60°C ambient due to the SOT563's θ_JA of 130°C/W. For sustained 1A operation at 85°C ambient, a 4-layer board with thermal vias to inner ground planes or localized copper pour is recommended to maintain junction temperature below 125°C.

What capacitor types are validated for input and output filtering?

The MP2141NGTF-15-Z is characterized and stabilized with X5R or X7R ceramic capacitors. Input: ≥10µF, 0805 or larger; Output: ≥10µF, low-ESR ceramic. Tantalum or aluminum electrolytic caps are not recommended due to ESR and lifetime limitations; if used, a 0.1µF ceramic must be placed in parallel and adjacent to the IC.

Does the part support forced PWM or automatic PFM/PWM mode switching?

No. The MP2141NGTF-15-Z uses constant-on-time control with Advanced Asynchronous Modulation (AAM) for automatic light-load efficiency optimization. It does not offer user-selectable PWM-only mode; instead, it transitions seamlessly between CCM, DCM, and sleep modes based on load current and output ripple, with no external mode-select pin.