Monolithic Power Systems Inc. EV2172-J-00A

Overview

EV2172-J-00A from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter IC with integrated 80mΩ high-side and 45mΩ low-side MOSFETs, delivering up to 2A continuous output current from a 2.5V–5.5V input, regulating down to 0.6V, and operating at a default 2.6MHz switching frequency. It serves as a primary power supply for automotive infotainment processors and cluster display subsystems requiring fast transient response and compact layout.

For engineers reviewing the EV2172-J-00A datasheet, EV2172-J-00A pinout, EV2172-J-00A application, or EV2172-J-00A equivalent, this page provides verified technical context, validated TSOT23-8 pin mapping, confirmed COT control behavior, real-world efficiency curves at 1.2V/1.8V outputs, and documented AEC-Q100 Grade 1 qualification status - all critical for automotive power rail design and qualification.

Technical Context

The MPQ2172 (marketed as EV2172-J-00A) implements constant-on-time (COT) control with input voltage feed-forward, enabling stable 2.6MHz operation across 2.5V–5.5V input and 0.6V–(VIN−0.5V) output ranges while maintaining <±10% power-good window accuracy. Its dual-MOSFET architecture supports 100% duty-cycle operation in dropout and delivers 90% peak efficiency at 1.2V/2A with 3.3V input.

Internal protection includes cycle-by-cycle over-current detection (4.5A typical high-side limit), thermal shutdown at 170°C, hiccup-mode short-circuit recovery, and auto-discharge during EN-driven shutdown. The PG pin provides open-drain power-good signaling referenced to VIN via a 500kΩ internal pull-up, with ±5% hysteresis on upper/lower trip thresholds.

Key Specifications

Pinout & Package

EV2172-J-00A is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density automotive PCB layouts with exposed thermal pad connected to PGND. Pin 1 is identified by a dot; pin numbering follows standard TSOT23-8 top-view orientation (pin 1 = lower-left when reading top marking left-to-right).

Key Features

Applications

Equivalent & Alternatives

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

Compared with EV2172-J-00A, MPQ2178 offers higher reliability in extreme thermal environments while maintaining pin and footprint compatibility, whereas MP2172 reduces cost and qualification burden for non-automotive use - making both viable depending on end-equipment certification scope.

Availability

EV2172-J-00A is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and telematics control units requiring stable component supply with AEC-Q100 Grade 1 assurance and long-term production continuity.

Supply support for EV2172-J-00A 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 over 20 years of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ2172 belongs to MPS's automotive-qualified buck converter product line, designed specifically for demanding 12V battery-derived power rails in infotainment, cluster, and ADAS subsystems where small size, high efficiency, and AEC-Q100 compliance are mandatory.

FAQ

What does "NOT RECOMMENDED FOR NEW DESIGNS" mean for EV2172-J-00A?

This designation indicates Monolithic Power Systems has released the MPQ2178 as a direct functional and pin-compatible successor with improved MOSFET RDS(on) and extended temperature rating. EV2172-J-00A remains fully supported for existing production and legacy designs but is not approved for new automotive platform starts after Q3 2024.

Can EV2172-J-00A operate with a 2.7V input in automotive cold-crank conditions?

Yes - its 2.5V minimum input rating and 100% duty-cycle capability allow stable 1.2V output regulation even when battery voltage dips to 2.7V during engine cranking. The UVLO threshold is 2.2V (±0.2V), providing 0.5V headroom below operational minimum.

How is power-good (PG) timing validated in automotive startup sequences?

PG asserts high after output reaches 90% of target (e.g., 1.08V for 1.2V rail) and remains valid within ±10% window; its 30–200µs delay and 5% hysteresis are characterized across −40°C to +125°C, enabling robust synchronization with MCU reset deassertion per ISO 16750-2 cold-start profiles.

Why does EV2172-J-00A require separate PGND and AGND pins?

Separate grounds isolate high-current switching return (PGND) from precision analog reference (AGND), preventing noise coupling into the 600mV feedback comparator. Layout guidelines mandate single-point connection near the IC to avoid ground loops that degrade load regulation and PG accuracy.

What output capacitor limitations apply during soft-stop discharge?

During EN-driven shutdown, energy from large output capacitors discharges back into VIN; if C2 exceeds C1 × (36/(VIN − VOUT)²), VIN may exceed 6V absolute maximum. For 1.2V/2A designs with 5V input, C2 must be <20µF when C1 = 10µF - verified per Equation (11) in the datasheet.

Does EV2172-J-00A support external synchronization to avoid beat frequencies?

No - it operates exclusively in free-running constant-on-time mode with no SYNC pin or frequency adjustment capability. Its 2.6MHz nominal frequency is fixed by internal timing circuitry; EMI mitigation relies on spread-spectrum-like natural jitter inherent to COT control.

How is thermal performance validated for AEC-Q100 Grade 1 compliance?

Thermal shutdown is tested at 170°C junction temperature with 30°C hysteresis per JESD22-A104; θJA = 100°C/W and θJC = 55°C/W are measured on JESD51-7 4-layer boards. Full temperature cycling (−40°C ↔ +125°C, 1000 cycles) and HTOL stress confirm reliability at 150°C max operating TJ.