Monolithic Power Systems Inc. MP2162AGQHT-P

Overview

MP2162AGQHT-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, regulating output as low as 0.6V with ±1.5% V_FB accuracy, and operating at a default 1.5MHz switching frequency for compact filter design - deployed in portable instruments and FPGA core power rails.

For engineers reviewing the MP2162AGQHT-P datasheet, MP2162AGQHT-P pinout, MP2162AGQHT-P application, or MP2162AGQHT-P equivalent, key selection criteria include its 17μA quiescent current in light-load operation, EN-controlled power sequencing capability, open-drain PG output with ±10% regulation window, and stable operation with low-ESR ceramic output capacitors.

Technical Context

The MP2162AGQHT-P employs constant-on-time (COT) control with input-voltage feed-forward to maintain near-constant 1.5MHz switching frequency across input (2.5V–6V) and output (0.6V–VIN) ranges, enabling fast transient response without external compensation. Its internal power stage integrates matched P-channel and N-channel MOSFETs with R_DS(on) of 110mΩ and 60mΩ respectively.

It features cycle-by-cycle over-current protection triggering hiccup-mode recovery during short-circuit events, thermal shutdown at 150°C with 30°C hysteresis, and a dedicated analog ground (AGND) pin isolated from power ground (PGND) to minimize noise coupling into the 0.6V reference feedback path.

Key Specifications

Pinout & Package

TQFN-8 (2.0mm × 1.5mm × 0.75mm) package with exposed thermal pad; RoHS-compliant, halogen-free, and lead-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6286418RTER and RT7295BGJ8F, the MP2162AGQHT-P uniquely combines ultra-low 17μA quiescent current, 2.5V minimum input, adjustable output down to 0.6V, and full power sequencing support (EN + PG + OUT sense) in a 2.0×1.5mm footprint - making it optimal for space- and battery-constrained multi-rail embedded systems.

Availability

MP2162AGQHT-P is available at Aetrix Electronics and suitable for portable instruments, FPGA power delivery, wireless sensor nodes, and low-voltage I/O systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP2162AGQHT-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MP2162A belongs to MPS's high-efficiency, low-I_Q DC/DC converter product line, designed specifically for battery-powered and space-constrained embedded systems requiring fast transient response and minimal external components.

FAQ

What is the maximum recommended PCB trace length between VIN and the input capacitor?

Maximum recommended trace length from VIN pin to the 10μF input capacitor is 2mm with ≥0.3mm width and direct connection to the thermal pad. Longer traces increase high-frequency ringing and reduce EMI performance due to added inductance in the input current loop.

Can MP2162AGQHT-P operate with a 1.0μH inductor at 5V input and 1.2V/2A output?

Yes - the datasheet specifies 1.0μH as the standard inductor value in its typical application circuit (Figure 4). At 1.2V/2A output, peak inductor current remains below 2.6A, well within the 3.2A current limit, and ripple current stays at ~30% of full load, ensuring stable CCM operation.

How does the PG pin behave during startup and fault conditions?

PG remains low until V_OUT reaches 90% of target (e.g., 1.08V for 1.2V setpoint); it then pulls high via internal 550kΩ resistor to VIN. If V_FB drops outside ±10% of 0.6V due to overload or short circuit, PG immediately sinks to ground with <400Ω R_DS(on).

Is the AGND pin required to be connected separately from PGND?

Yes - AGND must connect to the analog ground plane and tie to PGND at a single point near the IC's thermal pad. Separating AGND from noisy PGND paths prevents switching noise from modulating the 0.6V reference and degrading output voltage accuracy.

Does MP2162AGQHT-P support forced PWM mode or only auto-mode?

No - MP2162AGQHT-P operates exclusively in automatic mode: it uses COT control with proprietary light-load DCM entry and exit. There is no pin or register to force continuous conduction mode; efficiency optimization is fully autonomous across 100μA–2A load range.

What is the minimum off-time specification and why does it matter?

The minimum off-time is 60ns - a hard limit preventing inductor current runaway during large load transients. It ensures stable operation even when V_IN/V_OUT ratio approaches unity, and guarantees minimum time for low-side FET turn-off before next high-side pulse.

Can the EN pin be driven directly by a 1.8V GPIO without level shifting?

No - EN logic high threshold is 1.2V minimum, but guaranteed operation requires ≥1.5V per datasheet test condition. A 1.8V GPIO meets this requirement; however, ensure source impedance <10kΩ to overcome the internal 1MΩ pulldown and avoid slow rise/fall times that cause erratic enable behavior.