Monolithic Power Systems Inc. MPM3630GQV-P

Overview

MPM3630GQV-P from Monolithic Power Systems is a fully integrated synchronous step-down DC/DC module with internal MOSFETs, inductor, and input/output capacitors, delivering 3A continuous output current across a 4.5V–18V input range. It operates at a fixed 1.4MHz switching frequency, features power-good (PG) indication, thermal shutdown, over-current protection with hiccup mode, and supports external frequency synchronization from 1MHz to 2MHz - used in space-constrained industrial and telecom power rails.

For engineers reviewing the MPM3630GQV-P datasheet, MPM3630GQV-P pinout, MPM3630GQV-P application, or MPM3630GQV-P equivalent, key selection criteria include its QFN20 (3×5×1.6mm) package with integrated magnetics, 0.6V adjustable output, 50mΩ/22mΩ HS/LS R_DS(on), and PG open-drain signaling for system power sequencing validation.

Technical Context

The MPM3630GQV-P implements a high-frequency synchronous buck architecture with three operating modes: Advanced Asynchronous Modulation (AAM) for light-load efficiency, Discontinuous Conduction Mode (DCM), and Continuous Conduction Mode (CCM). Its internal 5V VCC regulator powers control circuitry across the full input range, and the error amplifier compares FB voltage against a 600mV reference to regulate output via COMP voltage-controlled PWM duty cycle.

Enable/SYNC pin provides dual functionality: logic-level enable/disable and external clock synchronization (1–2MHz); PG pin asserts after 110μs when VFB exceeds 92% of reference and de-asserts after 26μs when VFB falls below 81% of reference. Thermal shutdown activates at 150°C with 20°C hysteresis, and OCP uses cycle-by-cycle peak current limiting followed by valley-current-triggered hiccup recovery during sustained overload.

Key Specifications

Pinout & Package

The MPM3630GQV-P is housed in a thermally enhanced QFN20 package (3mm × 5mm × 1.6mm) with exposed thermal pad (PGND-connected) and 0.5mm pitch. Pin 1 is marked by a dot; pins 10, 15, 19, and 20 are no-connect (NC) and must remain floating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPSM84624 and LTM4622, the MPM3630GQV-P offers the smallest total solution size due to full integration of inductor and capacitors, lowest component count for single-output 3A designs, and fastest time-to-market for space-constrained industrial and medical applications.

Availability

MPM3630GQV-P is available at Aetrix Electronics and suitable for industrial controls, medical imaging subsystems, and telecom remote radio units requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MPM3630GQV-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPM3630 product line targets compact, high-efficiency DC/DC conversion for resource-constrained applications - designed specifically to replace discrete buck regulators and LDOs in industrial, medical, and communications equipment where board space and time-to-market are critical.

FAQ

What is the minimum output voltage achievable with MPM3630GQV-P?

The MPM3630GQV-P supports output voltages down to 0.6V, set by the internal 600mV feedback reference and an external resistor divider. The datasheet confirms guaranteed operation from 0.6V to VIN × D_MAX (≤90%), with recommended use up to 5.5V for optimal thermal performance and ripple control.

Does MPM3630GQV-P require external input or output capacitors?

Yes - although the module integrates an inductor and two internal capacitors, it requires external input and output ceramic capacitors. A minimum 22µF low-ESR X5R/X7R ceramic capacitor is required at the IN pin, and ≥22µF (typically 2×22µF) is recommended at the OUT pin to ensure stability and meet ripple specifications across load transients.

How does the EN/SYNC pin function in synchronization mode?

When an external 1–2MHz clock is applied to EN/SYNC, the MPM3630GQV-P aligns its internal oscillator's rising edge to the external clock's rising edge after a 2.2ms delay. The external clock must have high-time ≥250ns and low-time ≥100ns; no pull-up resistor is needed since EN has an internal 1.1MΩ pull-down.

What thermal performance can be expected with standard 4-layer PCB layout?

With a standard JEDEC 4-layer PCB (2oz copper, thermal vias under exposed pad), the MPM3630GQV-P achieves θ_JA = 46°C/W and θ_JC = 10°C/W. At 3A load and 12V_IN/3.3V_OUT, junction temperature rise is ~65°C above ambient, allowing full-rated output up to +85°C ambient without derating.

Is there over-voltage protection on the output?

No - the MPM3630GQV-P does not implement dedicated output over-voltage protection. The PG pin only monitors undervoltage (VFB < 81% of 600mV) and does not respond to over-voltage conditions. System-level OVP must be implemented externally using a supervisor IC or Zener clamp if required.

Can the MPM3630GQV-P operate with input voltage below 4.5V?

No - the absolute minimum input voltage is 4.5V per recommended operating conditions. Below this, UVLO prevents startup; the rising threshold is 4.1V ±0.2V, with 740mV hysteresis. Operation at 4.0V or lower will result in no regulation or intermittent enable behavior.

What is the purpose of the NC pins (10, 15, 19, 20)?

Pins 10, 15, 19, and 20 are no-connect (NC) terminals - they are electrically isolated from internal circuitry and must remain unconnected and floating. Routing traces or placing vias on these pins violates the keep-out zone defined in the QFN20 mechanical drawing and may compromise thermal or electrical performance.