Monolithic Power Systems Inc. MP2152GTF-25-P

Overview

MP2152GTF-25-P from Monolithic Power Systems is a fixed-output 2.5V, 2A synchronous step-down DC/DC converter in SOT563 package, featuring 25μA quiescent current, 1.1MHz switching frequency, and integrated 75mΩ/45mΩ power MOSFETs. It delivers stable low-voltage power for battery-powered microcontrollers and I/O rails with output discharge, VOUT OVP, and hiccup-mode short-circuit protection.

For engineers reviewing the MP2152GTF-25-P datasheet, MP2152GTF-25-P pinout, MP2152GTF-25-P application, or MP2152GTF-25-P equivalent, key selection considerations include its fixed 2.5V output accuracy (±1% over temperature), EN-controlled sequencing, thermal shutdown at 160°C, and compatibility with minimal external components including 1µH inductor and 22µF output capacitor.

Technical Context

The MP2152GTF-25-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across 2.5V–5.5V input range while enabling fast transient response without loop compensation. Its internal architecture integrates high-side P-FET (75mΩ) and low-side N-FET (45mΩ), eliminating external MOSFETs and gate drivers.

It operates in advanced asynchronous mode (AAM) at light loads, using zero-current detection (ZCD) to force discontinuous conduction mode and reduce switching losses. Output discharge is activated automatically during shutdown via an internal 200Ω resistor, and power good (PG) signaling-available only on fixed-output variants-is implemented as an open-drain output with 150μs delay and ±5% window tolerance.

Key Specifications

Pinout & Package

SOT563 (2.1mm × 1.6mm × 0.55mm) thermally enhanced package with exposed pad for improved heat dissipation; rated for 1.5W continuous power dissipation at TA = +25°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62840DRVR and RTQ2134BGQW, MP2152GTF-25-P uniquely combines 2.5V fixed output, 2.5V minimum input, integrated output discharge, and PG signaling in a 2.1mm × 1.6mm package - making it optimal for space-constrained, battery-deep-discharge, and sequenced-power applications where all four features are required simultaneously.

Availability

MP2152GTF-25-P is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered medical wearables, low-voltage I/O rails, and multi-function printer logic supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2152GTF-25-P 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 expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP2152 belongs to MPS's ultra-low-IQ synchronous buck converter product line, designed specifically for energy-sensitive portable, medical, and IoT applications where extended battery life, small solution size, and robust protection features are mandatory.

FAQ

What is the exact output voltage tolerance of MP2152GTF-25-P over temperature?

The MP2152GTF-25-P delivers 2.5V output with ±1% accuracy at +25°C and ±1.5% over the full –40°C to +125°C junction temperature range, as confirmed by electrical characterization data in the Rev. 1.01 datasheet (page 5, "OUT voltage (MP2152XXX-25)" table). This includes both initial tolerance and thermal drift.

Does MP2152GTF-25-P require an external feedback resistor divider?

No. MP2152GTF-25-P is a fixed-output variant with internal resistor divider set to 2.5V; the FB pin is not connected externally and must be left unpopulated or floating. Only adjustable versions (e.g., MP2152GTF) require external R1/R2 networks.

Can MP2152GTF-25-P operate with input voltage below 2.5V?

No. The absolute minimum operating input voltage is 2.5V per the Recommended Operating Conditions table (page 4). Attempting to operate below this causes under-voltage lockout activation at ~2.3V rising threshold, preventing regulation.

What is the purpose of the PG pin, and how should it be terminated?

The PG pin is an open-drain power-good indicator that pulls low when VOUT deviates outside ±5% of 2.5V (i.e., <2.375V or >2.625V). It requires an external pull-up resistor (100–500kΩ) to VIN; typical rise/fall delay is 150μs, and sink capability is rated to 0.4V at 1mA.

How does output discharge behave during EN deactivation?

When EN is pulled low, the MP2152GTF-25-P activates an internal 200Ω discharge path between OUT and GND, reducing VOUT from 2.5V to <100mV within 1ms (typical) - verified in Figure 11's "EN Shutdown IOUT = 0A" waveform (page 11). No external components are needed.

Is thermal derating required for 2A continuous output in SOT563 package?

Yes. At TA = +25°C, maximum continuous output is 2A; however, ambient temperature rise requires derating per the "Output Current Derating vs. Ambient Temperature" curve (page 9). At 60°C ambient, max output drops to ~1.6A due to θJA = 80°C/W and thermal shutdown at 160°C junction.

Does MP2152GTF-25-P support forced PWM or automatic PFM/PWM mode switching?

It uses advanced asynchronous mode (AAM) with zero-current detection (ZCD) to automatically transition between CCM and DCM based on load. There is no user-controllable mode select; light-load efficiency is optimized via AAM, not forced PWM.