Monolithic Power Systems Inc. MP2162BGQH-P

Overview

MP2162BGQH-P from Monolithic Power Systems is a 2A, 6V-input synchronous step-down DC/DC converter with Constant-On-Time (COT) control, 1.5MHz switching frequency, 17μA quiescent current, and integrated 100mΩ/60mΩ MOSFETs in a 2.0×1.5mm QFN-8 package. It regulates output down to 0.6V and supports 100% duty cycle in dropout-ideal for powering low-voltage I/O rails in portable instruments.

For engineers reviewing the MP2162BGQH-P datasheet, MP2162BGQH-P pinout, MP2162BGQH-P application, or MP2162BGQH-P equivalent, key selection criteria include its ultra-low IQ for battery longevity, EN/PG pins for power sequencing in multi-rail systems, COT architecture for fast transient response in FPGA/DSP core supplies, and compatibility with low-ESR ceramic output capacitors without external compensation.

Technical Context

The MP2162BGQH-P implements a Constant-On-Time control scheme with input voltage feed-forward to maintain stable ~1.5MHz switching across 2.5–6V input and 0.6–VIN output ranges. Its internal high-side PFET (100mΩ R_DS(on)) and low-side NFET (60mΩ R_DS(on)) enable high efficiency at light and full load.

Fault protection includes cycle-by-cycle current limiting (typ. 3.2A), thermal shutdown at 150°C with 30°C hysteresis, short-circuit hiccup mode recovery, and ±10% power-good window referenced to 0.6V feedback threshold. Soft-start time is fixed at 1.5ms.

Key Specifications

Pinout & Package

MP2162BGQH-P uses an ultra-compact 2.0mm × 1.5mm QFN-8 package with exposed thermal pad (PGND-connected) for enhanced power dissipation in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62864DLCR and RT7297BZSP, MP2162BGQH-P uniquely balances ultra-small 2×1.5mm footprint, 2.5V start-up, integrated PG, and 17μA I_Q-making it optimal for space- and battery-limited portable electronics where rail sequencing and long standby life are mandatory.

Availability

MP2162BGQH-P is available at Aetrix Electronics and suitable for portable medical sensors, FPGA core power, industrial IoT edge nodes, and USB-powered test instruments requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for MP2162BGQH-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 MP2162 belongs to MPS's ultra-compact DC/DC converter product line, engineered specifically for battery-powered and space-constrained applications demanding high efficiency, low quiescent current, and seamless power sequencing.

FAQ

What is the minimum input voltage required for MP2162BGQH-P to start switching?

The MP2162BGQH-P features an under-voltage lockout (UVLO) with a rising threshold of 2.15V to 2.45V (typ. 2.3V). It begins switching only when VIN exceeds this threshold, ensuring stable operation before enabling the power stage. Below this voltage, the device remains fully disabled with <1μA supply current.

Can MP2162BGQH-P operate with 100% duty cycle, and what does that enable?

Yes-the MP2162BGQH-P supports 100% duty cycle operation, allowing the output voltage to track the input down to V_OUT = V_IN. This is essential for maintaining regulation during battery discharge, such as when a 3.7V Li-ion cell drops to 3.3V while powering a 3.3V rail, eliminating the need for a separate LDO post-regulator.

How does the Power Good (PG) pin behave during startup and fault conditions?

The PG pin is an open-drain output with internal 550kΩ pull-up to VIN. It asserts high (pulled to VIN) only when the FB voltage remains within ±10% of 0.6V for ≥50μs. During startup, it remains low until soft-start completes (~1.5ms); during overcurrent or thermal shutdown, it pulls low within microseconds to signal fault.

What is the recommended inductor value range, and why is DCR critical?

MPS recommends 0.68μH to 2.2μH inductors with DC resistance <15mΩ. Low DCR minimizes conduction loss-especially critical at 2A load-while the inductance range balances ripple current (target ~30% of I_LOAD), transient response, and physical size. Higher DCR directly reduces efficiency and increases thermal stress.

Does MP2162BGQH-P require external compensation components?

No-its Constant-On-Time (COT) control architecture eliminates the need for external compensation networks (e.g., type-II/III compensators). Stability is inherent and guaranteed with standard ceramic output capacitors (≥10μF, X5R/X7R), simplifying design and reducing bill-of-materials cost and PCB area.

Is the thermal pad on the QFN-8 package electrically connected, and how should it be handled?

Yes-the exposed thermal pad is internally connected to PGND. It must be soldered to a dedicated PGND copper pour on the PCB using ≥4 thermal vias (0.3mm diameter) to an inner ground plane. This connection is essential to achieve the specified θ_JA = 110°C/W and prevent thermal shutdown under 2A continuous load.