Monolithic Power Systems Inc. MP2153GTF-33-P

Overview

MP2153GTF-33-P from Monolithic Power Systems is a fixed-output 3.3V, 3A synchronous step-down DC/DC converter in SOT563 package, featuring 25μA quiescent current, 1.1MHz switching frequency, and integrated 65mΩ/35mΩ MOSFETs. It delivers stable power to low-voltage digital rails in space-constrained portable SSDs and battery-powered instrumentation.

For engineers reviewing the MP2153GTF-33-P datasheet, MP2153GTF-33-P pinout, MP2153GTF-33-P application, or MP2153GTF-33-P equivalent, key selection criteria include its 3.3V ±1% output accuracy over -40°C to +125°C, output discharge capability during shutdown, and compatibility with 1μH inductors and 22μF ceramic output capacitors in ultra-small footprint designs.

Technical Context

The MP2153GTF-33-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across 2.5V–5.5V input range. Its internal high-side P-channel and low-side N-channel MOSFETs (65mΩ/35mΩ) enable up to 3A continuous output at 3.3V with minimal external components.

Fault protection includes cycle-by-cycle current limiting (4A peak), thermal shutdown at 160°C, hiccup-mode short-circuit recovery, and output over-voltage protection triggered at 115% of nominal VOUT. The device enters sleep mode below light load to sustain 25μA IQ, and features EN-controlled sequencing with 150μs turn-on delay.

Key Specifications

Pinout & Package

SOT563 (1.6mm × 1.6mm) ultra-small surface-mount package with wettable flanks for automated optical inspection and robust solder joint reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62865133RQWR and RT7295BGJ6F, MP2153GTF-33-P uniquely combines ultra-low 25μA IQ, output discharge, and PG indication in the smallest SOT563 footprint-making it optimal for space- and battery-life-constrained 3.3V systems where all three features are simultaneously required.

Availability

MP2153GTF-33-P is available at Aetrix Electronics and suitable for solid-state drives, portable instrumentation, and battery-powered IoT nodes requiring stable component supply with guaranteed long-term availability and RoHS-compliant sourcing.

Supply support for MP2153GTF-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 power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2153 product line targets ultra-compact, high-efficiency DC/DC conversion for portable and battery-operated electronics-emphasizing minimal external components, low quiescent current, and robust protection in sub-2mm² packages.

FAQ

What is the recommended input capacitor for MP2153GTF-33-P?

A 10μF X5R/X7R ceramic capacitor placed within 2mm of the VIN and GND pins is required to suppress high-frequency switching noise and prevent input voltage droop during load transients. A 1μF ceramic capacitor in parallel improves high-frequency decoupling. Total effective capacitance must remain ≥10μF at DC bias.

Does MP2153GTF-33-P require an external feedback resistor divider?

No. MP2153GTF-33-P is a fixed-output variant with internal resistor divider set to 3.3V; the FB pin is not connected and must be left floating per datasheet. Using external resistors would disrupt regulation and void output accuracy guarantees.

How does the output discharge function operate during shutdown?

When EN is pulled low, the internal 200Ω discharge FET activates between OUT and GND, actively bleeding the output capacitor to <100mV within 1–2ms. This prevents residual voltage from powering downstream circuitry or causing latch-up during hot-swap events.

What is the thermal performance of MP2153GTF-33-P in SOT563 package?

In standard 2-layer JEDEC test board (63mm×63mm), θJA is 80°C/W. At 3A output into 3.3V with 5V input, typical junction rise is ~25°C above ambient-well below 125°C max operating temperature. For >2A continuous loads, add thermal vias under GND pad to improve heat transfer.

Can MP2153GTF-33-P be used with ceramic output capacitors only?

Yes. The COT control architecture is inherently stable with low-ESR ceramic capacitors. A 22μF X5R/X7R 0805 or 1206 ceramic capacitor is recommended; no electrolytic or tantalum capacitor is needed. Ensure DC bias derating maintains ≥15μF effective capacitance at 3.3V.

What happens during input undervoltage lockout (UVLO)?

When VIN drops below 2.45V (typical rising threshold), the device disables switching and enters shutdown. Hysteresis of 200mV prevents oscillation near threshold. Output discharge remains active until VIN falls below 2.25V, ensuring clean rail collapse.

Is the PG pin compatible with 1.8V logic systems?

No. PG is open-drain with internal pull-down; external pull-up must be to VIN (2.5–5.5V). Minimum sink voltage is 0.4V at 1mA, so interfacing with 1.8V logic requires a level-shifter or voltage divider to avoid violating VIH/VIL thresholds.