Monolithic Power Systems Inc. MPM3570EGLD

Overview

MPM3570EGLD from Monolithic Power Systems is a fully integrated, synchronous step-down power module with integrated inductor, delivering 0.3A output current across a 4.5V–75V input range and adjustable 1.0V–12.0V output voltage (default 3.3V). It features ultra-low EMI compliance to CISPR25 Class 5, 25µA shutdown quiescent current, and thermal shutdown at 175°C - deployed in automotive infotainment power rails where high-voltage transient resilience and compact footprint are critical.

For engineers reviewing the MPM3570EGLD datasheet, MPM3570EGLD pinout, MPM3570EGLD application, or MPM3570EGLD equivalent, key selection criteria include its LGA8 (10mm×10mm×4.2mm) package integration, FB pin regulation to 1.0V, POK open-drain indicator with 90%/84% V_FB-REF thresholds, and non-latch OCP/UVLO protection for robust operation in harsh environments.

Technical Context

The MPM3570EGLD implements a fixed-frequency, current-mode synchronous buck architecture with internal high-side and low-side MOSFETs, integrated 22µH power inductor, and on-die compensation. Its control loop uses a reference-based feedback comparator with internal soft-start ramp (1.4ms typical) and zero-current detection for light-load efficiency optimization.

EMI suppression is achieved via integrated input filtering, optimized switching edge rates, and layout-aware internal routing - enabling CISPR25 Class 5 compliance with only a minimal external π-filter (10µF + 2.2µH + 22µF). The POK signal provides precise power-good monitoring referenced to 90% of V_FB-REF, while EN operates with 1.6V rising threshold and 400mV hysteresis for reliable remote enable/disable sequencing.

Key Specifications

Pinout & Package

LGA8 package (10mm × 10mm × 4.2mm), thermally enhanced with exposed ground paddle; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RECOM R-78E5.0-0.3 and TI TPSM84203, the MPM3570EGLD uniquely combines 75V input tolerance, adjustable output, POK/EN interfaces, and automotive-grade EMI compliance in a surface-mount LGA package - making it the sole option for compact, high-voltage, programmable POL in safety-critical embedded systems.

Availability

MPM3570EGLD is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, and telecom remote PHY units requiring stable component supply across extended temperature and voltage ranges.

Supply support for MPM3570EGLD 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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPM3570EGLD belongs to MPS's ultra-low-EMI power module product line, engineered specifically for automotive and industrial applications demanding high input voltage resilience, compact integration, and regulatory emissions compliance without external shielding.

FAQ

What is the recommended input capacitor configuration for MPM3570EGLD?

Use ≥4.7µF X7R/X7S ceramic capacitors rated ≥100V (e.g., Murata GRM32DC72A475KE01) placed adjacent to the VIN pin. For optimal EMI performance, add a 10µF + 2.2µH + 22µF π-filter to meet CISPR25 Class 5. Avoid Y5V/Z5U dielectrics due to severe capacitance loss under bias and temperature.

How is output voltage adjusted on the MPM3570EGLD?

Output voltage is set by connecting an external resistor between FB and VOUT (for VOUT < 3.3V) or between FB and GND (for VOUT > 3.3V). The FB pin is regulated to 1.0V; equations in the datasheet calculate RFB1 or RFB2 values. Default 3.3V uses internal 1.2MΩ/523kΩ divider - no external resistors needed.

Does MPM3570EGLD support remote enable/disable sequencing?

Yes. The EN pin accepts active-high logic (1.6V rising threshold, 400mV hysteresis) and features internal pull-up, allowing direct connection to microcontroller GPIO or floating for default-enable operation. An internal 6.5V Zener clamp protects against overvoltage - drive with ≤6V logic signals only.

What thermal derating applies to MPM3570EGLD at elevated ambient temperatures?

At 100°C ambient, maximum output current drops to ~0.2A (per thermal derating curve on page 7 of datasheet). Derating depends on PCB copper area, airflow, and input/output voltage differential. For 0.3A continuous operation above 85°C, use ≥40cm² 2-layer FR4 with thermal vias to inner ground planes.

Can MPM3570EGLD be used in safety-critical automotive applications?

Yes - it operates from –40°C to +125°C, includes non-latch OCP, UVLO, and thermal shutdown with 20°C hysteresis, and meets CISPR25 Class 5 EMI requirements. However, it is not AEC-Q200 qualified; for ASIL-B/C systems, additional system-level fault handling and redundancy must be implemented.

What is the purpose of the POK pin and how should it be interfaced?

POK is an open-drain output that goes HIGH when VOUT reaches ≥90% of target and LOW when ≤84%. It requires an external pull-up resistor (typically 10kΩ to VOUT or system rail) to generate a logic-level signal for microcontroller reset or status monitoring. Its 40µs deglitch time rejects brief transients.

Is the integrated inductor shielded and what is its saturation current?

Yes - the integrated 22µH inductor is shielded and rated for ≥0.45A saturation current (per Figure 1 block diagram and thermal testing data). This provides margin above the 0.3A continuous rating, supporting peak loads and ensuring stable operation under transient conditions without core saturation.