Monolithic Power Systems Inc. MP2152GQFU-18-P

Overview

MP2152GQFU-18-P from Monolithic Power Systems is a fixed-output 1.8V, 2A synchronous step-down DC/DC converter in a 1.2mm×1.6mm UTQFN package, featuring 25μA quiescent current, 1.1MHz switching frequency, and integrated 75mΩ/45mΩ MOSFETs. It delivers high efficiency across 2.5–5.5V input for battery-powered portable devices requiring stable low-voltage rail generation.

For engineers reviewing the MP2152GQFU-18-P datasheet, MP2152GQFU-18-P pinout, MP2152GQFU-18-P application, or MP2152GQFU-18-P equivalent, key selection considerations include its fixed 1.8V output with ±1% FB accuracy, output discharge capability, VOUT OVP (115% threshold), hiccup-mode short-circuit protection, and EN-controlled power sequencing in space-constrained designs.

Technical Context

The MP2152GQFU-18-P employs constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across its 2.5–5.5V input range and 1.8V output. Its internal high-side P-FET (75mΩ) and low-side N-FET (45mΩ) enable up to 2A continuous output with minimal external components.

It integrates output discharge via an internal MOSFET, supports EN-based power sequencing with 150μs turn-on delay, and provides VOUT over-voltage protection triggered at 115% of nominal (2.07V), followed by dynamic regulation using low-side conduction until recovery to 105% (1.89V).

Key Specifications

Pinout & Package

MP2152GQFU-18-P uses a 6-pin UTQFN package (1.2mm × 1.6mm, 0.4mm pitch) with wettable flank leads for automated optical inspection. Thermal pad exposed on bottom enhances heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output buck converter applications.

Compared with TPS62260DRVR and ADP2302ARMZ-1.8-R7, MP2152GQFU-18-P uniquely balances 2A capability, ultra-low 35μA quiescent current, and 1.2×1.6mm UTQFN packaging-making it optimal for space- and energy-constrained portable electronics where both peak current and standby efficiency are critical.

Availability

MP2152GQFU-18-P is available at Aetrix Electronics and suitable for wireless networking cards, battery-powered portable instruments, and low-voltage I/O system power requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MP2152GQFU-18-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP2152 product line targets ultra-compact, high-efficiency power management for portable and battery-operated systems, emphasizing low IQ, small footprint, and robust protection features in sub-2mm² packages.

FAQ

Does MP2152GQFU-18-P require external feedback resistors?

No. MP2152GQFU-18-P is a fixed-output variant with internal resistor divider set to 1.8V; no external FB resistors are needed. This simplifies layout, eliminates resistor tolerance errors, and reduces bill-of-materials count compared to adjustable versions like MP2152GQFU.

What is the purpose of the PG pin, and how must it be connected?

The PG (power good) pin is an open-drain output that asserts high when VOUT is within –10% to +15% of 1.8V (1.62–2.07V). It requires an external pull-up resistor (100–500kΩ) to VIN. PG enables system-level power sequencing and boot validation by signaling stable 1.8V rail presence to host controllers or PMICs.

How does output discharge operate, and when is it active?

Output discharge activates automatically when EN is pulled low or floats. An internal MOSFET connects OUT to GND through a ~200Ω path, rapidly discharging the output capacitor. This ensures clean power-down behavior required for proper reset sequencing in microcontrollers and memory devices.

Can MP2152GQFU-18-P operate with input voltage below 2.5V?

No. The absolute minimum operating input voltage is 2.5V per datasheet specifications. Under-voltage lockout (UVLO) disables the device below ~2.3V rising threshold, and operation below 2.5V is not characterized or guaranteed. For sub-2.5V inputs, consider alternative regulators with lower VIN minima.

Is thermal derating required for 2A continuous output in the UTQFN package?

Yes. At TA = +85°C, maximum continuous output current drops to ~1.6A due to thermal limits (θJA = 65°C/W, TJ(max) = 125°C). Full 2A operation is rated for TA ≤ +60°C with adequate PCB copper area (≥2 cm² 2oz copper under thermal pad) per EV2152-QFU-00A demo board guidelines.

What protection features are implemented, and how do they behave under fault?

MP2152GQFU-18-P implements cycle-by-cycle current limiting, thermal shutdown (160°C), hiccup-mode short-circuit protection, and VOUT OVP (115% trigger). During short circuit, it disables switching, discharges SS capacitor, and retries soft-start every ~10ms until fault clears-limiting average power and preventing thermal runaway.