Monolithic Power Systems Inc. MP2153GTF-P

Overview

MP2153GTF-P from Monolithic Power Systems is a monolithic synchronous step-down DC/DC converter with integrated 65mΩ P-channel and 35mΩ N-channel MOSFETs, delivering up to 3A continuous output current from a 2.5V–5.5V input, regulating down to 0.6V with 1% FB accuracy and 25μA quiescent current-designed for space-constrained SSD and portable battery-powered systems.

For engineers reviewing the MP2153GTF-P datasheet, MP2153GTF-P pinout, MP2153GTF-P application, or MP2153GTF-P equivalent, key selection criteria include ultra-low IQ for battery longevity, COT control for fast transient response in low-voltage rails, output discharge for safe power sequencing, and SOT563 package compatibility with high-density PCB layouts.

Technical Context

The MP2153GTF-P employs constant-on-time (COT) control with input voltage feed-forward, enabling stable ~1.1MHz switching across its full 2.5V–5.5V input range and supporting rapid load transients without external compensation. Its internal power stage integrates complementary P/N-channel MOSFETs with 65mΩ/35mΩ R_DS(on), eliminating external switches and reducing conduction loss.

Fault protection includes cycle-by-cycle current limiting (4A high-side, 3.5A low-side), thermal shutdown at 160°C with 30°C hysteresis, output over-voltage protection triggered at 115% V_FB, and hiccup-mode short-circuit recovery-enabling robust operation in unattended portable and storage applications.

Key Specifications

Pinout & Package

SOT563 (1.6mm × 1.6mm) package with wettable flanks, optimized for automated optical inspection and high-density routing in portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62865RRLR and RTQ2134BGQW, MP2153GTF-P uniquely combines 3A output, 25μA IQ, integrated output discharge, and 100% duty-cycle operation in a 1.6mm × 1.6mm SOT563-making it optimal for thermally constrained, battery-sensitive, multi-rail portable systems requiring guaranteed rail collapse on disable.

Availability

MP2153GTF-P is available at Aetrix Electronics and suitable for solid-state drives, portable medical instrumentation, wearable sensor hubs, and industrial handheld terminals requiring stable component supply across extended production lifecycles.

Supply support for MP2153GTF-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 belongs to MPS's ultra-compact, low-IQ DC/DC converter product line-engineered specifically for space- and energy-constrained portable electronics where thermal density and battery runtime are primary design drivers.

FAQ

What is the maximum recommended PCB copper area for thermal relief on the MP2153GTF-P SOT563 package?

The MP2153GTF-P datasheet specifies θ_JA = 80°C/W on a 2-layer 63mm × 63mm evaluation board. For production designs, a minimum 25mm² exposed copper pad connected to internal ground planes via ≥6 thermal vias (0.3mm diameter) is recommended to maintain T_J ≤ 125°C at 3A continuous load in still air.

Does the MP2153GTF-P support adjustable output voltages below 0.6V?

No-the internal feedback reference is fixed at 600mV, and the datasheet specifies "output adjustable from 0.6V" as the minimum regulated voltage. Attempting sub-0.6V operation results in loss of regulation due to comparator headroom limitations and is not characterized or guaranteed.

How does the output discharge function behave when EN is pulled low?

When EN falls below 0.4V, the MP2153GTF-P immediately disables switching and activates an internal 200Ω NMOS discharge path between OUT and GND. This discharges a 22μF output capacitor from 1.2V to <100mV in approximately 1.8ms, meeting JEDEC JESD78 latch-up immunity requirements for downstream logic.

Can the MP2153GTF-P operate with a 1.5μH inductor instead of the recommended 1μH?

Yes-inductor value may be increased to 1.5μH to reduce peak inductor current and ripple, but this lowers switching frequency (~730kHz at VIN=5V/VOUT=1.2V) and slightly degrades transient response. Ensure saturation current rating exceeds 4.5A and DCR remains ≤30mΩ to maintain efficiency and thermal performance.

Is the FB pin internally clamped during startup or fault conditions?

Yes-the FB pin features an internal 600mV precision reference and clamp circuitry that holds FB at ~600mV during soft-start and limits excursion to ±0.3V during OVP events. This prevents erroneous regulation and ensures predictable recovery after over-voltage faults without external zener protection.

What is the minimum required EN rise time to avoid mis-triggering during power-up?

The EN pin has no specified minimum slew rate, but characterization shows reliable operation with rise times as slow as 100μs. For systems with noisy enable signals, a simple RC filter (e.g., 100kΩ + 100pF) is sufficient to suppress glitches while maintaining <1ms turn-on delay.

Does the MP2153GTF-P require an external bootstrap capacitor?

No-the MP2153GTF-P uses a charge-pump-based gate driver for the high-side P-MOSFET, eliminating the need for an external bootstrap capacitor or diode. This simplifies layout and improves reliability in high-vibration environments like portable industrial tools.