Monolithic Power Systems Inc. MP2164GG-P

Overview

MP2164GG-P from Monolithic Power Systems is a synchronous step-down DC-DC converter IC with integrated 32mΩ high-side and 20mΩ low-side MOSFETs, delivering up to 3A continuous output current from a 2.5V–5.5V input. It features constant-on-time (COT) control, 2.3MHz switching frequency, 0.6V feedback reference, and MODE pin for forced PWM or auto-PFM operation - optimized for single-cell Li+-powered portable devices.

For engineers reviewing the MP2164GG-P datasheet, MP2164GG-P pinout, MP2164GG-P application, or MP2164GG-P equivalent, key selection criteria include light-load efficiency (>80% at 10mA), thermal shutdown (150°C), hiccup-mode short-circuit protection, QFN-12 (2×2mm) package compatibility, and stable operation with low-ESR ceramic output capacitors.

Technical Context

The MP2164GG-P implements a constant-on-time (COT) control architecture with input voltage feed-forward, enabling fast transient response and near-constant 2.3MHz switching across its 2.5V–5.5V input range. Its internal 0.6V reference and precision feedback comparator regulate output down to 0.6V with ±0.5% typical VFB accuracy.

It integrates dual power MOSFETs (32mΩ PCH / 20mΩ NCH), soft-start (1.2ms), open-drain power-good (PG) with 5% UV/OV hysteresis, and programmable MODE pin logic (≥1.2V = forced PWM; ≤0.4V/floating = auto-PFM). Protection includes cycle-by-cycle current limiting (5A typ), thermal shutdown (150°C), and hiccup-mode SCP.

Key Specifications

Pinout & Package

MP2164GG-P is housed in a thermally enhanced QFN-12 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. Dual PGND pins (1, 12) and dual IN pins (10, 11) reduce PCB layout impedance and improve thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with TPS62864DLCR and RTQ2134BGQW, MP2164GG-P uniquely combines MODE-selectable PFM/PWM, 0.6V output capability, hiccup-mode SCP, and full integration in a 2×2mm QFN - making it optimal for battery-powered portable systems prioritizing size, light-load efficiency, and autonomous fault handling.

Availability

MP2164GG-P is available at Aetrix Electronics and suitable for smartphone power management, wireless module design, portable SSD development, and low-voltage I/O system power requiring stable component supply across production lifecycles.

Supply support for MP2164GG-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 leadership in DC-DC conversion technology.

The MP2164 belongs to MPS's high-frequency synchronous buck converter product line, designed specifically for space- and efficiency-critical portable electronics powered by single-cell lithium batteries.

FAQ

What is the minimum output voltage supported by MP2164GG-P?

The MP2164GG-P supports output voltages as low as 0.6V, set by its internal feedback reference voltage. This is achieved using an external resistor divider on the FB pin, with R1 ≥10kΩ recommended for stability. The datasheet confirms 0.6V ±1% reference accuracy over temperature and line conditions.

How does the MODE pin affect efficiency and EMI performance?

When MODE ≥1.2V, the device operates in forced PWM mode - delivering constant 2.3MHz switching and predictable EMI spectrum, ideal for noise-sensitive RF sections. When MODE ≤0.4V or floating, it enters auto-PFM mode, skipping pulses at light loads to achieve >80% efficiency at 10mA while reducing average switching frequency and EMI energy.

Can MP2164GG-P operate in 100% duty cycle during dropout?

Yes - the MP2164GG-P supports 100% duty cycle operation when VIN approaches VOUT, maintaining regulation without dropout. This is enabled by its COT architecture and internal gate drive design, allowing seamless transition into dropout while sustaining output voltage down to VIN – VDROP (typically <200mV at 3A).

What is the recommended input capacitor configuration?

A 22µF X5R/X7R ceramic capacitor placed close to the IN and PGND pins is recommended. For higher-output-voltage applications (e.g., 3.3V), a second 10µF ceramic in parallel improves high-frequency decoupling. The datasheet specifies RMS current rating should exceed half the maximum load current (≥1.5A RMS for 3A output).

Does MP2164GG-P require external compensation components?

No - the MP2164GG-P uses constant-on-time (COT) control with built-in voltage feed-forward, eliminating the need for external compensation networks. Stability is ensured with standard 22µF ceramic output capacitors (ESR <10mΩ), simplifying layout and reducing BOM count.

How does the power-good (PG) pin behave during startup and fault conditions?

PG is an open-drain output pulled low when FB voltage deviates by >5% from 0.6V (UV or OV). During startup, PG asserts high ~1.2ms after EN is enabled and VOUT reaches regulation. Under short-circuit, PG pulls low within microseconds and remains low until hiccup recovery completes and regulation is restored.

Is thermal pad soldering required for reliable operation at 3A?

Yes - the exposed thermal pad (pin 13) must be soldered to a dedicated PCB thermal plane with ≥4 thermal vias (0.3mm diameter) to inner ground layers. Without proper thermal pad connection, junction temperature exceeds 125°C at 3A/25°C ambient, triggering thermal shutdown per θJA = 80°C/W specification.