Monolithic Power Systems Inc. MP2162GQH-Z

Overview

MP2162GQH-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 100mΩ P-channel and 60mΩ N-channel MOSFETs, delivering up to 2A continuous output current from 2.5V–6V input, regulating down to 0.6V, and featuring 17μA quiescent current and 1.5MHz fixed switching frequency. It serves as a primary power supply for low-voltage I/O rails in portable instrumentation and battery-powered FPGAs.

For engineers reviewing the MP2162GQH-Z datasheet, MP2162GQH-Z pinout, MP2162GQH-Z application, or MP2162GQH-Z equivalent, key selection criteria include its Constant-On-Time (COT) control architecture for fast transient response, EN/PG pins enabling precise power sequencing, ultra-small 2.0×1.5mm QFN-8 package footprint, and compatibility with low-ESR ceramic output capacitors without external compensation.

Technical Context

The MP2162 employs a Constant-On-Time (COT) control scheme with input voltage feed-forward, ensuring stable 1.5MHz switching across 2.5V–6V input and 0.6V–VIN output ranges. Its internal high-side and low-side MOSFETs (100mΩ/60mΩ R_DS(on)) enable >90% efficiency at 2A load with minimal external components.

Fault protection includes cycle-by-cycle over-current limiting (typ. 3.2A), thermal shutdown at 150°C with 30°C hysteresis, short-circuit hiccup mode recovery, and UVLO with 2.3V rising threshold and 260mV hysteresis. The open-drain PG pin features a 550kΩ internal pull-up to VIN and ±10% output regulation window detection.

Key Specifications

Pinout & Package

MP2162GQH-Z is housed in an ultra-compact 2.0mm × 1.5mm, 0.5mm pitch QFN-8 package with exposed thermal pad (PGND-connected) for enhanced thermal performance in space-constrained layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62864DLCR and RT7295BGJ6F, MP2162GQH-Z uniquely balances ultra-low IQ (17μA), integrated PG/EN sequencing, and COT responsiveness in the smallest QFN footprint-making it optimal for space- and battery-limited portable designs requiring deterministic power-up behavior.

Availability

MP2162GQH-Z is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered wireless modules, and FPGA core voltage supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2162GQH-Z 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 synchronous buck regulator product line, engineered specifically for space-constrained, battery-sensitive applications demanding high efficiency at light loads and robust power sequencing capability.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP2162GQH-Z is stable with low-ESR ceramic capacitors ≥10μF. For 1.2V/2A operation, a 22μF X5R 0603 ceramic capacitor with ≤10mΩ ESR meets ripple and stability requirements per the datasheet's COT control loop design. Larger values improve transient response but require verification of soft-start time impact.

Does MP2162GQH-Z support forced PWM mode at light load?

No-the MP2162GQH-Z automatically enters discontinuous conduction mode (DCM) at light load to minimize quiescent current. It does not offer a forced PWM pin or register setting; this behavior is inherent to its proprietary light-load control scheme and contributes to the 17μA IQ specification.

Can the PG pin drive an LED directly without an external transistor?

No-the PG pin is an open-drain output with only 550kΩ internal pull-up to VIN and limited sink current (≥1mA at 0.4V). Driving even a low-current LED (e.g., 2mA) would violate the specified sink voltage limit and cause unreliable assertion; an external NPN/NMOS buffer is required.

What is the maximum achievable output voltage accuracy over temperature and line/load conditions?

Over –40°C to +125°C junction temperature and full line/load range, output voltage accuracy is ±3.5% due to ±3.5% V_FB tolerance, resistor divider ratio error, and layout-induced sense errors. Using 0.5% resistors and Kelvin sensing improves accuracy to ±1.5% typical.

Is the thermal pad (EPAD) electrically connected internally?

Yes-the exposed thermal pad on the MP2162GQH-Z QFN-8 package is internally connected to PGND. It must be soldered to a dedicated PGND copper pour with ≥4 thermal vias to ensure effective heat dissipation and meet the θ_JA = 110°C/W specification.

How does the 60ns minimum off-time affect minimum output voltage at high input voltages?

At VIN = 6V, the 60ns minimum off-time limits the maximum duty cycle to ~90%, constraining the lowest achievable V_OUT to approximately 0.6V (the internal reference). This aligns with the device's 0.6V minimum output specification and ensures stable COT operation across the full input range.