Monolithic Power Systems Inc. MP2153GTF-15-Z

Overview

MP2153GTF-15-Z from Monolithic Power Systems is a fixed-output 1.5V, 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 logic rails in portable SSDs and battery-powered instrumentation.

For engineers reviewing the MP2153GTF-15-Z datasheet, MP2153GTF-15-Z pinout, MP2153GTF-15-Z application, or MP2153GTF-15-Z equivalent, key selection criteria include fixed 1.5V output accuracy (±1%), output discharge capability, EN-controlled sequencing, thermal shutdown at 160°C, and compatibility with 1μH inductors and 22μF ceramic output capacitors.

Technical Context

The MP2153GTF-15-Z 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 enable up to 3A continuous output with 100% duty-cycle capability for low-dropout operation.

Fault protection includes cycle-by-cycle current limiting (4A peak), hiccup-mode short-circuit response, VOUT over-voltage protection (115% VFB threshold), and thermal shutdown with 30°C hysteresis. The device enters sleep mode at light loads to sustain 25μA IQ while regulating average VFB to 600mV.

Key Specifications

Pinout & Package

SOT563 (1.6mm × 1.6mm) ultra-small surface-mount package with exposed pad for thermal enhancement. Pin 1 = GND, Pin 2 = SW, Pin 3 = VIN, Pin 4 = EN, Pin 5 = FB (not used in fixed-VOUT version), Pin 6 = OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62840DRVR and RTQ2134BGQW, MP2153GTF-15-Z uniquely combines 3A capability, guaranteed 1.5V ±1% accuracy, and integrated output discharge in a manufacturable SOT563 package-making it optimal for cost-sensitive, high-reliability portable systems requiring deterministic rail collapse.

Availability

MP2153GTF-15-Z is available at Aetrix Electronics and suitable for solid-state drives, portable instrumentation, and battery-powered medical sensors requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MP2153GTF-15-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 power management ICs, founded in 1997 and headquartered in Kirkland, Washington.

The MP2153 product line targets ultra-compact, low-IQ DC/DC conversion for space-constrained portable and battery-operated electronics-emphasizing integration, thermal efficiency, and ease of use without external compensation.

FAQ

What is the recommended input capacitor for MP2153GTF-15-Z?

A 10μF X5R/X7R ceramic capacitor placed within 2mm of VIN and GND pins is required to suppress high-frequency switching noise and prevent input voltage droop during load transients. A 1μF ceramic in parallel improves high-frequency decoupling. Total effective capacitance must exceed 8μF at DC bias.

Does MP2153GTF-15-Z require external feedback resistors?

No. As a fixed-output variant, MP2153GTF-15-Z has internal resistor divider set to 1.5V; the FB pin is not connected and must remain unpopulated or floating. External resistors would disrupt regulation and are strictly prohibited.

How does the output discharge function operate?

When EN is pulled low, an internal 200Ω NMOS switch connects OUT to GND, discharging the output capacitor. Discharge completes in <1ms for a 22μF capacitor, ensuring rapid rail collapse to prevent latch-up or data corruption in downstream logic.

Can MP2153GTF-15-Z operate at 100% duty cycle?

Yes. The device supports 100% duty-cycle operation down to VIN – VDROP (≈2.5V), enabling dropout-free regulation when input voltage approaches output voltage-critical for single-cell Li-ion or Li-poly battery systems.

What thermal derating applies at 85°C ambient?

At TA = 85°C, maximum continuous output current reduces to ~2.4A due to θJA = 80°C/W and TJ(MAX) = 125°C. Derating follows linear interpolation: IOUT(MAX) = 3A × (1 − (TA − 25)/100). Forced airflow or copper pour improves margin.

Is there a power-good indicator on this part?

No. MP2153GTF-15-Z omits the PG pin found on UTQFN-fixed variants (e.g., MP2153GQFU-15). Power status must be inferred from EN state or monitored externally using a voltage supervisor on the 1.5V rail.

What inductor value is validated for 3A operation?

A 1.0μH shielded power inductor with ≥3.5A saturation current and ≤27mΩ DCR is validated per MPS EV2153-TF-00A evaluation board. Inductor selection directly impacts efficiency, thermal rise, and transient response-deviations require revalidation.