Monolithic Power Systems Inc. MP2167AGQE-P

Overview

MP2167AGQE-P from Monolithic Power Systems is a 2.7V–6V input, 6A synchronous buck converter with configurable switching frequency (300kHz–2.2MHz), integrated 35mΩ/25mΩ MOSFETs, and selectable AAM/FCCM operation modes. It delivers regulated output down to 0.606V with internal compensation and supports portable instruments, battery-powered devices, and industrial supplies requiring high efficiency in compact space-constrained designs.

For engineers reviewing the MP2167AGQE-P datasheet, MP2167AGQE-P pinout, MP2167AGQE-P application, or MP2167AGQE-P equivalent, key selection criteria include light-load efficiency mode selection (AAM vs FCCM), SYNC clock compatibility up to 2.2MHz, thermal shutdown behavior at 170°C, PG indicator timing (40–180μs delay), and QFN-14 wettable flank package suitability for automated optical inspection.

Technical Context

The MP2167AGQE-P employs peak current-mode control with internal compensation, enabling fast transient response and cycle-by-cycle over-current protection using valley current detection. Its dual-mode operation-AAM for ultra-low IQ (42μA) at light loads and FCCM for fixed-frequency, low-ripple regulation-is selected via the MODE pin voltage threshold (0.4V/1.2V).

Switching is governed by an adjustable oscillator tied to the FREQ/SYNC pin, supporting resistor-based frequency setting or external synchronization up to 2.2MHz. The functional block integrates UVLO (2.5V rising), OVP (115% of VFB), SCP with auto-recovery, and thermal shutdown with 25°C hysteresis-all without external components beyond feedback resistors and soft-start capacitor.

Key Specifications

Pinout & Package

MP2167AGQE-P is housed in a wettable flank QFN-14 (3mm × 3mm) package optimized for solder joint inspection and thermal performance (θJA = 39°C/W on EVB). The exposed thermal pad must be connected to PGND for optimal power dissipation and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2167AGQE-P, MP2164GQ-Z trades configurability for lower cost and simpler layout, while TPS62864DLCR offers tighter frequency tolerance but increases design complexity and footprint - making MP2167AGQE-P optimal for space-constrained, battery-sensitive, and multi-rail synchronized applications.

Availability

MP2167AGQE-P is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLCs, and USB-C peripheral power management requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for MP2167AGQE-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 power management ICs, with emphasis on integration, efficiency, and miniaturization for portable and industrial applications.

The MP2167A product line targets compact, high-current DC-DC conversion in battery-powered and space-constrained systems, delivering integrated power stages, advanced light-load control, and robust protection in thermally enhanced QFN packages.

FAQ

What is the minimum output voltage achievable with MP2167AGQE-P?

The MP2167AGQE-P regulates down to 0.606V ±10mV, set by its internal reference. This enables direct generation of core voltages for modern low-power MCUs and FPGAs (e.g., 0.8V, 1.0V, 1.2V) using standard resistor dividers without external amplification.

How does the MODE pin affect efficiency and output ripple?

When MODE is pulled low (<0.4V), AAM mode reduces switching frequency under light loads, cutting IQ to 42μA and maximizing battery life-but increases output ripple. When MODE is high (>1.2V), FCCM enforces fixed frequency and delivers <1% VOUT ripple at all loads, ideal for noise-sensitive analog circuits.

Can MP2167AGQE-P synchronize to an external clock above 1MHz?

Yes - the FREQ/SYNC pin accepts external clocks from 300kHz to 2.2MHz. At 2.2MHz, it maintains stable operation with tight jitter control, enabling phase-shifted multi-rail designs that reduce input capacitor RMS current by up to 40%.

What thermal derating applies at 125°C ambient?

With θJA = 39°C/W on the EVB, junction temperature rise at 6A is ~234°C - exceeding 150°C max. Derating is required: at 125°C ambient, max continuous current drops to ~3.8A to maintain TJ ≤ 150°C, per PD(MAX) = (150 − 125)/39 ≈ 0.64W.

Is the PG signal compatible with 1.8V logic interfaces?

PG is an open-drain output with internal pull-up to VIN. When VIN ≥ 3.3V, PG high-level voltage exceeds 2.4V - compatible with 3.3V logic. For 1.8V systems, an external pull-down or level shifter is required, as PG does not sink below 300mV at 1mA load.

Does MP2167AGQE-P support 100% duty cycle operation?

Yes - the controller supports 100% duty cycle, allowing VOUT to approach VIN during low-dropout conditions (e.g., 2.7V input → 2.6V output). This avoids dropout-induced brownouts in battery-powered systems nearing end-of-discharge.

What is the recommended PCB layout practice for the AGND and PGND planes?

AGND and PGND must be separated on the top layer and joined at a single point near the IC's ground pins (pins 3, 4, and 6). PGND carries high di/dt switching currents and must route directly to input/output capacitor negatives; AGND serves analog circuitry and must avoid crossing PGND traces.