Monolithic Power Systems Inc. MP2153GTF-Z

Overview

MP2153GTF-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC 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 featuring 25μA quiescent current for ultra-low-power portable SSD and battery-powered systems.

For engineers reviewing the MP2153GTF-Z datasheet, MP2153GTF-Z pinout, MP2153GTF-Z application, or MP2153GTF-Z equivalent, key selection considerations include its COT control architecture for fast transient response, output discharge capability during shutdown, 1.1MHz fixed switching frequency, thermal shutdown at 160°C, and SOT563 package compatibility with space-constrained PCB layouts.

Technical Context

The MP2153GTF-Z implements constant-on-time (COT) control with input voltage feed-forward, enabling stable 1.1MHz operation across its full 2.5V–5.5V input range while maintaining fast load-step response without external compensation. Its internal power stage integrates complementary P/N-channel MOSFETs with 65mΩ/35mΩ R_DS(on), supporting up to 3A continuous output in discontinuous or continuous conduction mode.

It features adaptive light-load operation via Advanced Asynchronous Modulation (AAM), entering sleep mode below ~10mA load to sustain 25μA I_Q; output discharge is activated automatically upon EN deassertion via an internal 200Ω discharge path; over-voltage protection triggers dynamic low-side conduction when V_FB exceeds 115% of 600mV reference, with 10% hysteresis.

Key Specifications

Pinout & Package

SOT563 (1.6mm × 1.6mm) package with wettable flank leads for automated optical inspection and reliable solder joint formation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62865RVL and RT7295BGJ6F, MP2153GTF-Z uniquely combines SOT563 size, 25μA I_Q, and integrated output discharge-making it optimal for space-constrained, battery-critical designs requiring rail cleanup during power-down.

Availability

MP2153GTF-Z is available at Aetrix Electronics and suitable for solid-state drives, portable medical instruments, battery-powered IoT sensors, and multi-function printers requiring stable component supply across extended production lifecycles.

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

The MP2153 belongs to MPS's ultra-compact, low-I_Q DC/DC converter product line, engineered specifically for space- and energy-constrained portable electronics where minimal footprint and maximum battery runtime are primary design drivers.

FAQ

What is the recommended inductor value and saturation current for MP2153GTF-Z?

A 1.0μH shielded power inductor with ≥4.5A saturation current (e.g., Coilcraft XAL5030-102MEB) is recommended per the typical application circuit. This value balances ripple current (≈1.2A pk-pk at 3A load), efficiency (>90% at 1.2V/2A), and physical size constraints of the SOT563 layout. Lower inductance increases ripple and losses; higher inductance reduces ripple but slows transient response.

Does MP2153GTF-Z support adjustable output voltage, and how is it set?

Yes, MP2153GTF-Z is the adjustable version. Output voltage is set using a resistor divider from VOUT to GND, with the FB pin connected to the midpoint. For a 1.2V output, use R1 = 200kΩ and R2 = 200kΩ (V_OUT = 0.6V × (1 + R1/R2)). Feedback resistors should be ≤200kΩ to limit leakage-induced error; 1% tolerance metal-film types are recommended for ±1% regulation accuracy.

How does the output discharge function operate, and when is it active?

Output discharge activates automatically when the EN pin is pulled low or left floating (due to internal 1MΩ pulldown). An internal 200Ω NMOS connects VOUT to GND, discharging the output capacitor within ~1–5ms depending on capacitance. This prevents residual voltage from interfering with system reset sequencing or causing back-powering of upstream circuitry during shutdown.

What thermal derating applies to MP2153GTF-Z at elevated ambient temperatures?

At 85°C ambient, the maximum continuous output current drops to ~2.2A (derated from 3A at 25°C) due to thermal limits. This is based on θ_JA = 80°C/W and T_J(MAX) = 125°C. A 2-layer PCB with 1-in² copper pour under the SOT563 improves heat dissipation; adding thermal vias to inner ground planes further lowers junction temperature by ~15°C at full load.

Is MP2153GTF-Z RoHS-compliant and halogen-free?

Yes, MP2153GTF-Z is fully RoHS-compliant, lead-free, and halogen-free per IEC 61249-2-21. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering up to 260°C peak temperature. Full compliance documentation, including substance declarations and test reports, is available on the MPS website under Quality Assurance.

Can MP2153GTF-Z be used in fixed-output configurations, or is it strictly adjustable?

MP2153GTF-Z is the adjustable version only. Fixed-output variants (e.g., MP2153GTF-12 for 1.2V) exist but use different part numbers and internal feedback networks. The "GTF" suffix denotes SOT563 packaging, while "-Z" indicates tape-and-reel packaging; the base MP2153GTF-Z requires external resistors for voltage setting and does not contain internal feedback dividers.

What protection features are implemented, and how do they behave under fault conditions?

MP2153GTF-Z includes cycle-by-cycle current limiting (4A peak), hiccup-mode short-circuit protection, thermal shutdown (160°C), V_OUT OVP (115% V_FB), and input UVLO (2.45V rising). During overload, it enters hiccup mode: disabling switching, discharging soft-start capacitor, then attempting auto-restart every ~10ms. Thermal shutdown holds until junction cools by 30°C, ensuring robust fault recovery without manual intervention.