Monolithic Power Systems Inc. MP2152GTF-33-P

Overview

MP2152GTF-33-P from Monolithic Power Systems is a fixed-output 3.3V, 2A synchronous step-down DC/DC converter in SOT563 package, featuring 25μA quiescent current, 1.1MHz switching frequency, and integrated 75mΩ/45mΩ power MOSFETs. It delivers stable regulation from 2.5V–5.5V input for low-power portable systems requiring ultra-low standby consumption and fast transient response.

For engineers reviewing the MP2152GTF-33-P datasheet, MP2152GTF-33-P pinout, MP2152GTF-33-P application, or MP2152GTF-33-P equivalent, key selection criteria include its fixed 3.3V output with ±1% FB accuracy, output discharge capability during shutdown, VOUT over-voltage protection (115% threshold), hiccup-mode short-circuit protection, and EN-controlled power sequencing in space-constrained battery-powered designs.

Technical Context

The MP2152GTF-33-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across its 2.5V–5.5V input range while enabling fast load-transient response. Its internal high-side P-MOSFET (75mΩ) and low-side N-MOSFET (45mΩ) support continuous 2A output with 100% duty-cycle capability for low-dropout operation.

Fault management includes cycle-by-cycle current limiting (2.8A P-FET peak), thermal shutdown at 160°C with 30°C hysteresis, output discharge via internal MOSFET (200Ω), and dynamic VOUT OVP regulation that activates when FB exceeds 115% of 600mV reference-pulling low-side on until current drops to –1.5A.

Key Specifications

Pinout & Package

SOT563 (1.6mm × 1.6mm × 0.55mm) thermally enhanced package with exposed pad for improved heat dissipation; rated 1.5W continuous power dissipation at +25°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS622313DRYR and ADP2303ARDZ-3.3-R7, the MP2152GTF-33-P uniquely balances ultra-low 30μA IQ, integrated output discharge, and hiccup-mode SCP in a 1.6mm×1.6mm package-making it optimal for battery longevity and fail-safe behavior in portable electronics, unlike the TI part's missing discharge or the ADI part's higher IQ and wider input range.

Availability

MP2152GTF-33-P is available at Aetrix Electronics and suitable for wireless networking cards, portable medical instruments, battery-powered industrial sensors, and low-voltage I/O system power requiring stable component supply across extended production lifecycles.

Supply support for MP2152GTF-33-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 over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP2152 product line targets ultra-low-power portable and battery-operated systems, emphasizing minimal quiescent current, small footprint, and robust protection features for next-generation wearables, IoT endpoints, and space-constrained embedded devices.

FAQ

What is the maximum allowable input voltage for MP2152GTF-33-P?

The absolute maximum input voltage is 6.5V, but the recommended operating range is strictly 2.5V to 5.5V. Exceeding 5.5V risks triggering absolute VIN OVP at 6.1V, which halts switching until input drops below 5.7V. For USB-powered designs, use a 5.5V-rated input capacitor and avoid unregulated 6V wall adapters.

Does MP2152GTF-33-P require external feedback resistors?

No. The "-33" suffix denotes a factory-trimmed fixed 3.3V output; FB pin is internally connected to the 600mV reference and must be left unconnected. External resistors are only required for adjustable versions (e.g., MP2152GTF). Connecting resistors to FB on the -33 variant will disrupt regulation.

How does the power good (PG) signal behave during startup and fault conditions?

PG asserts high (via external pull-up) only when VOUT reaches and maintains 3.3V within ±10%/+15% tolerance for ≥150μs. During startup, PG remains low until soft-start completes (~0.5ms). Under over-voltage (>3.795V) or undervoltage (<2.97V), PG pulls low immediately via internal MOSFET with <400Ω R_DS(ON).

Can MP2152GTF-33-P operate with 100% duty cycle, and what is the minimum input voltage for regulation?

Yes-it supports true 100% duty cycle, allowing regulation down to VIN = VOUT = 3.3V. Minimum functional input is 2.5V, but regulation is only guaranteed above the UVLO rising threshold of 2.45V. Below 2.45V, the device shuts down; hysteresis of 200mV ensures clean restart at 2.65V.

What is the thermal performance of the SOT563 package under 2A load?

At 2A output and 5V input, junction temperature rise is ~45°C above ambient on a 2-layer 1oz copper PCB (per EV2152-TF-00A demo board). With θ_JA = 80°C/W, max ambient for 125°C T_J is 80°C. For higher ambient, reduce load current or add thermal vias under the exposed pad.

Is output discharge active during EN-driven shutdown only, or also during input UVLO?

Output discharge is active only when EN is pulled low (or left floating, due to internal 1MΩ pull-down). It is not triggered during input UVLO-when VIN drops below 2.45V, the device simply stops switching and holds VOUT via output capacitor, with no intentional discharge path.

What inductor value is recommended, and why is shielding critical?

A 1.0µH shielded metal-alloy inductor (e.g., Wurth 74437324010) is recommended. Shielding is mandatory because unshielded inductors radiate strong magnetic fields at 1.1MHz, coupling into adjacent analog traces and causing noise in ADCs or RF receivers-verified in MPS application note AN-107.