Monolithic Power Systems Inc. MP2153DGTF-P

Overview

MP2153DGTF-P from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 65mΩ high-side and 35mΩ low-side MOSFETs, delivering up to 3A continuous output current across a 2.5V–5.5V input range while regulating output down to 0.6V. It employs constant-on-time (COT) control for fast transient response and features fast output discharge, 1% FB accuracy, and 25μA quiescent current-enabling efficient power delivery in space-constrained SSD and portable battery-powered systems.

For engineers reviewing the MP2153DGTF-P datasheet, MP2153DGTF-P pinout, MP2153DGTF-P application, or MP2153DGTF-P equivalent, key selection considerations include its SOT563 package footprint, 1.1MHz switching frequency, EN-controlled power sequencing, thermal shutdown at 160°C, and compatibility with standard 1μH shielded inductors and 22μF ceramic output capacitors.

Technical Context

The MP2153DGTF-P uses constant-on-time (COT) control with VIN feed-forward to maintain stable 1.1MHz switching frequency across input and output voltage variations. Its internal P-channel HS-FET and N-channel LS-FET enable synchronous rectification with 65mΩ/35mΩ R_DS(ON), supporting CCM, DCM, and advanced asynchronous modulation (AAM) modes for light-load efficiency.

Operation includes fast output discharge via an internal 13Ω discharge path when EN is deasserted, cycle-by-cycle over-current protection with 6A peak HS-FET limit, hiccup-mode short-circuit recovery, and dual-stage OVP: dynamic FB-based regulation (115% V_FB) followed by absolute VIN OVP at 6.1V.

Key Specifications

Pinout & Package

SOT563 (1.6mm × 1.6mm, 0.5mm pitch) ultra-small package with wettable flank leads for automated optical inspection. Thermal resistance θ_JA = 80°C/W on 2-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RT6220BGQW and TPS62865ARGTR, the MP2153DGTF-P uniquely balances 3A capability, 1.1MHz operation, adjustable output, and integrated fast discharge in a 1.6mm² SOT563 package-making it optimal for compact, battery-sensitive, and dynamically loaded applications where simplicity and reliability are prioritized over programmability or ultra-high current.

Availability

MP2153DGTF-P is available at Aetrix Electronics and suitable for solid-state drives, portable medical instruments, USB-C peripherals, and industrial handheld scanners requiring stable component supply with consistent parametric performance and long-term manufacturability.

Supply support for MP2153DGTF-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP2153 series belongs to MPS's low-I_Q, high-efficiency synchronous buck converter product line, designed specifically for space-constrained, battery-powered, and thermally sensitive applications demanding fast transient response and robust protection.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP2153DGTF-P requires ≥22μF ceramic output capacitance (X5R/X7R dielectric) with low ESR to ensure stability and limit output ripple. Using less than 22μF risks instability under full load, especially at V_OUT ≥2.5V; the datasheet confirms 22μF achieves <15mV peak-to-peak ripple at 3A with 1μH inductor and 1.1MHz switching.

Does the MP2153DGTF-P support forced PWM mode?

No-the MP2153DGTF-P does not support forced PWM mode. It operates in COT-controlled auto-frequency mode with AAM and sleep modes for light-load efficiency. There is no pin or register to disable discontinuous conduction; PWM-like behavior occurs only in heavy-load CCM, governed by t_ON = 0.91μs × V_OUT/V_IN.

Can the EN pin be driven by a microcontroller GPIO without level shifting?

Yes-EN accepts 0V (off) or ≥1.2V (on) logic levels, making it directly compatible with 1.8V, 3.3V, and 5V GPIO outputs. The internal 1MΩ pulldown ensures reliable turn-off when GPIO is high-impedance or floating, and EN input current remains ≤1.2μA at 2V, minimizing MCU drive burden.

How does the fast output discharge function interact with external pull-down resistors?

The internal 13Ω discharge FET activates only when EN = 0V and V_OUT > 0.1V. External pull-down resistors on the output rail will parallel the internal path, reducing effective discharge resistance and accelerating discharge-but may increase static power loss during normal operation if improperly sized.

Is the MP2153DGTF-P qualified for automotive applications?

No-the MP2153DGTF-P is rated for industrial temperature range (–40°C to +125°C junction), but it is not AEC-Q200 qualified or specified for automotive use. It lacks automotive-specific documentation such as PPAP support, zero-defect screening, or extended reliability testing required for under-hood or infotainment systems.

What is the maximum achievable output voltage accuracy across temperature and line/load conditions?

Over –40°C to +125°C and full line/load range, output voltage accuracy is dominated by the ±1% FB reference (591–609mV) and resistor divider tolerance. With 1% R1/R2, total V_OUT error is typically ±1.5%, verified in Figure 7's reference voltage vs. temperature plot showing <±0.5mV drift from –40°C to +125°C.

Does the device require a soft-start capacitor?

No-soft-start is fully internal with a fixed 0.5ms ramp time. No external capacitor is needed or supported; adding one would disrupt the built-in timing and potentially cause start-up overshoot or failure to regulate.