Monolithic Power Systems Inc. MPM3606AGQV-P

Overview

MPM3606AGQV-P from Monolithic Power Systems is a fully integrated synchronous step-down DC/DC module with internal MOSFETs, inductor, VCC and bootstrap capacitors, delivering 0.6A continuous output current across a 4.5V–21V input range. It features power-good indication, thermal shutdown, over-current protection with hiccup mode, and adjustable output voltage down to 0.8V - deployed in space-constrained industrial controls and medical imaging power rails.

For engineers reviewing the MPM3606AGQV-P datasheet, MPM3606AGQV-P pinout, MPM3606AGQV-P application, or MPM3606AGQV-P equivalent, key selection criteria include its QFN20 (3×5×1.6mm) package footprint, integrated magnetics reducing external component count to five, fast load transient response, and power-save mode operation for light-load efficiency in battery-adjacent or low-power subsystems.

Technical Context

The MPM3606AGQV-P implements a high-frequency (1.5–2.5 MHz) synchronous buck topology with three operating modes: Advanced Asynchronous Modulation (AAM) for light loads, Discontinuous Conduction Mode (DCM), and Continuous Conduction Mode (CCM). Its internal 4.9V LDO powers control circuitry across the full input range, and the error amplifier uses a 0.798V reference with integrated compensation.

Protection logic includes cycle-by-cycle over-current detection triggering valley-current-limited hiccup mode upon sustained overload, thermal shutdown at 150°C with 20°C hysteresis, and UVLO with 3.9V rising threshold and 675mV hysteresis. The open-drain PG pin asserts after 35µs when FB exceeds 90% of VREF and deasserts within 80µs if FB falls below 83% of VREF.

Key Specifications

Pinout & Package

MPM3606AGQV-P is housed in a thermally enhanced QFN20 package (3mm × 5mm × 1.6mm) with exposed thermal pad. Pin 1 is marked by dot; pins 10, 15, 19, and 20 are no-connect and must remain floating. SW (pins 4–6) and OUT (pins 7–9) require large copper pours and multiple vias for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSM1052-33, MPM3606AGQV-P offers programmable output and power-good signaling at the cost of slightly larger footprint; versus MPM3610AGQV-P, it delivers lower conduction loss and better light-load efficiency at reduced current rating - enabling optimal trade-off between thermal performance and system-level power budget.

Availability

MPM3606AGQV-P is available at Aetrix Electronics and suitable for industrial controls, medical imaging equipment, and telecom line cards requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MPM3606AGQV-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 MPM3606A series belongs to MPS's integrated power module product line, engineered to eliminate magnetics design complexity and accelerate time-to-market for space-constrained, high-reliability power conversion in industrial and medical applications.

FAQ

What is the minimum output voltage achievable with MPM3606AGQV-P?

The device supports output voltages down to 0.8V, set by the feedback resistor divider using the internal 0.798V reference. Below 0.8V, regulation accuracy degrades due to comparator offset and noise; for stable operation, 0.8V is the validated lower limit per datasheet testing and characterization.

Can MPM3606AGQV-P operate with a 24V input?

No - the absolute maximum input voltage is 28V, but recommended operating range is strictly 4.5V to 21V. Applying 24V violates the specified operating condition and risks premature failure due to overstress on internal MOSFETs and gate drivers, as confirmed by absolute maximum ratings and thermal derating curves.

Is an external bootstrap capacitor required?

No. The MPM3606AGQV-P integrates both the bootstrap capacitor and charging circuitry. Pin 11 (BST) is internally connected and must remain unconnected - adding an external capacitor may disrupt internal regulation and cause startup failure or erratic switching behavior.

How does the power-good (PG) signal behave during thermal shutdown?

During thermal shutdown, the PG pin is pulled low immediately - independent of FB voltage - providing unambiguous fault indication. This behavior is explicitly defined in the Operation section and verified in thermal stress testing, ensuring reliable system-level fault detection and safe shutdown sequencing.

What is the purpose of the NC pins, and can they be grounded?

Pins 10, 15, 19, and 20 are designated "No Connect" and must remain electrically floating. Grounding or connecting them risks internal latch-up, parasitic current paths, or degraded thermal performance - the datasheet mandates floating per absolute maximum ratings and functional block diagram validation.

Does MPM3606AGQV-P support pre-biased output start-up?

Yes - the device implements monotonic pre-bias start-up. When the output is held at a non-zero voltage before enable, the internal soft-start circuit synchronizes ramp-up to avoid reverse current flow, as verified in typical performance waveforms and confirmed in the Operation section under "Pre-Bias Start-Up".

What is the maximum allowable output capacitance?

No hard upper limit is specified, but stability analysis shows phase margin remains >45° with up to 100µF ceramic output capacitance. Larger values increase soft-start time and may affect transient response; the recommended 22µF value balances ripple reduction and control loop robustness per design examples.