MPM1517SJ Complete Datasheet: Specs, Pinout & Notes

3 July 2026 61

The MPM1517SJ module is a compact DC/DC power module rated for a headline output capability of 15 V at up to 1.7 A continuous from a single package. This module is ideal for regulated rails where board space and low external parts count are critical. This reference summarizes electrical limits, pinout, and practical integration tips to accelerate prototype-to-production decisions.

Overview & Key Specifications

The MPM1517SJ is a fully packaged switching regulator designed for point-of-load applications. It integrates switching elements and control circuitry, requiring only minimal external capacitors.

ParameterTypical / Note
Input Voltage Range4.5 V – 18 V (Verify absolute limits)
Nominal Output Voltage15 V (Single Output)
Max Output Current1.7 A Continuous (Thermal Limited)
Efficiency80–92% (Load/Vin dependent)
Switching FrequencyInternal Fixed (Refer to EMI plan)
Thermal LimitsDerating required above rated junction temp
MPM1517SJ VIN EN VOUT GND

Pinout & Mechanical Details

Mapping pads correctly is essential for thermal management and signal integrity. High-current traces for VIN and VOUT should be as short as possible.

PinNameFunction / Notes
1VINInput supply; use low-ESR decoupling
2GNDPower return; tie to ground plane via thermal vias
3VOUTRegulated 15 V output; monitor load current
4ENEnable input; TTL logic compatible
—Thermal PadConnect to large copper area for heat dissipation

Typical Circuits & BOM Highlights

A standard implementation requires minimal external components. X7R ceramic capacitors are recommended for the input to handle switching currents effectively.

PartRoleNotes
Input CapDecouplingCeramic X7R, Rated > 25V
Output CapStabilityLow-ESR, place close to VOUT pin
Ferrite BeadEMI SuppressionOptional; place on VIN line

Summary & Integration Checklist

The MPM1517SJ provides a compact 15 V solution but requires careful attention to thermal routing and decoupling. Key takeaways include:

  • Headline capability: 15 V output at 1.7 A—prioritize PCB copper for continuous high-load operation.
  • Layout: Follow recommended pad dimensions and place thermal vias under the module.
  • Stability: Use specific low-ESR output capacitors to prevent oscillation.
  • Testing: Capture switching waveforms and perform load-step tests during prototyping.

FAQ

What is the maximum output current for this module?
The module’s rated maximum continuous output current is 1.7 A; however, actual allowable continuous current depends on PCB thermal management and ambient conditions. Verify by measuring case temperature and following datasheet derating curves.
Which capacitors are required for stable operation?
Use manufacturer-specified ceramic input capacitors (X7R) with adequate voltage headroom and a low-ESR output capacitor placed close to the VOUT pin. Incorrect ESR can cause instability.
How should I debug instability or oscillation?
Start with scope captures of the switching node and output under step loads. Ensure decoupling is present and that layout keeps loop areas small. Improving grounding and thermal connections often resolves noise issues.
What are the recommended thermal management practices?
Integrate large copper pours on both top and bottom layers, connected by multiple thermal vias directly under the module's ground pad. This maximizes heat transfer to the ambient environment.

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