Monolithic Power Systems Inc. MP2162AGQH-P

Overview

MP2162AGQH-P from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 110mΩ high-side and 60mΩ low-side MOSFETs, delivering up to 2A continuous output current from a 2.5V–6V input while regulating output down to 0.6V. It employs constant-on-time (COT) control for fast transient response, achieves 17μA quiescent current, and features power-good (PG) and enable (EN) pins for sequencing in FPGA and DSP power rails.

For engineers reviewing the MP2162AGQH-P datasheet, MP2162AGQH-P pinout, MP2162AGQH-P application, or MP2162AGQH-P equivalent, key selection criteria include its 1.5MHz switching frequency, ±1.5% VFB accuracy, hiccup-mode short-circuit protection, and compatibility with low-ESR ceramic output capacitors in space-constrained portable instrument designs.

Technical Context

The MP2162AGQH-P uses input-voltage feed-forward COT control to maintain stable 1.5MHz switching across 2.5V–6V input and 0.6V–VIN output ranges, with a fixed 60ns minimum off-time to prevent current runaway. Its internal PFET/NFET pair enables 100% duty-cycle operation in dropout.

It integrates EN logic-level control (1.2V high threshold), open-drain PG with 550kΩ internal pull-up and ±10% trip window, soft-start (1.15ms typical), and cycle-by-cycle over-current protection triggering hiccup recovery during sustained overload or short-circuit events.

Key Specifications

Pinout & Package

MP2162AGQH-P is housed in a QFN-8 package (2.0mm × 1.5mm, 0.75mm height) with exposed thermal pad for enhanced power dissipation. Pin 1 is marked by a dot or notch; the package complies with JEDEC MO-220 and supports reflow soldering per IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2162AGQH-P, MP2161AGQH-Z offers footprint compatibility but insufficient current for demanding loads, while TPS62864DRLR trades COT responsiveness and PG integration for marginally higher switching frequency and no built-in fault signaling-making MP2162AGQH-P optimal for space-constrained, battery-sensitive, and sequenced-power applications.

Availability

MP2162AGQH-P is available at Aetrix Electronics and suitable for wireless networking cards, portable instruments, and battery-powered medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2162AGQH-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2162A product line delivers ultra-small, high-efficiency synchronous buck converters optimized for portable, battery-operated, and space-constrained applications where low IQ, fast transient response, and minimal external components are critical.

FAQ

What is the maximum recommended PCB temperature rise for MP2162AGQH-P at 2A load?

The device has a θJA of 110°C/W on a standard 4-layer board. At 2A output into 1.2V, typical power dissipation is ~250mW. This yields a junction-to-ambient rise of ~27.5°C above ambient, well below the 125°C max operating junction temperature. Thermal relief via the exposed pad and 2oz copper pours is strongly advised for sustained 2A operation.

Can MP2162AGQH-P operate with an input voltage below 2.5V?

No. The absolute minimum operating input voltage is 2.5V per the Recommended Operating Conditions table. Below this, UVLO prevents startup; the rising UVLO threshold is 2.3V typical, but guaranteed operation begins only at 2.5V. Attempting operation at 2.4V may result in unstable regulation or failure to start.

Does MP2162AGQH-P require an external soft-start capacitor?

No. MP2162AGQH-P integrates a factory-trimmed soft-start circuit with a typical ramp time of 1.15ms. No external capacitor is needed or supported; adding one would disrupt the internal timing and potentially cause startup overshoot or failure.

How does the PG pin behave during undervoltage or overvoltage conditions on the output?

PG is an open-drain output pulled up internally to VIN via 550kΩ. It asserts high only when the FB voltage remains within ±10% of 0.6V (i.e., 0.54V–0.66V). If output drops below 0.54V or rises above 0.66V-due to load dump, feedback resistor drift, or short circuit-PG is actively pulled low by an internal NMOS with RDS(on) <400Ω.

Is MP2162AGQH-P compatible with ceramic capacitors having X5R dielectric?

Yes. The datasheet explicitly recommends X5R or X7R ceramic capacitors for both input and output due to their low ESR and stable capacitance over temperature and DC bias. A 10µF, 1206-size, 10V-rated X5R MLCC is validated for use in the typical application circuit on page 1.

What is the minimum off-time limitation and how does it affect light-load efficiency?

The MP2162AGQH-P enforces a fixed 60ns minimum off-time to prevent inductor current runaway during transients. In light-load DCM operation, this limit interacts with propagation delay (~50ns) in zero-current detection. To reliably enter DCM, the calculated CCM off-time must exceed 100ns-achievable with appropriate VIN/VOUT ratios or smaller inductors.

Does MP2162AGQH-P support forced PWM mode or only auto-mode (DCM/PFM)?

MP2162AGQH-P operates exclusively in automatic mode: it uses COT control in CCM at medium-to-heavy loads and transitions to discontinuous conduction mode (DCM) at light loads to minimize IQ. There is no pin or register to force continuous PWM; efficiency optimization is fully autonomous.