Monolithic Power Systems Inc. MP6219DN-LF-P

Overview

MP6219DN-LF-P from Monolithic Power Systems is a programmable current-limit power distribution switch designed for 5V USB and peripheral power rail protection. It integrates a 44mΩ N-channel MOSFET, supports adjustable current limit up to 2A via external resistor (RPRGM), and delivers thermal shutdown, UVLO (3.6V typ), overvoltage clamping (6.65V typ), and 1.1ms soft-start. Used in notebook PC power sequencing and USB port current management.

For engineers reviewing the MP6219DN-LF-P datasheet, MP6219DN-LF-P pinout, MP6219DN-LF-P application, or MP6219DN-LF-P equivalent, key selection criteria include programmable trip/hold current thresholds, EN/FAULT bidirectional fault signaling, SOIC8E exposed-pad thermal performance, and compatibility with heavy capacitive loads requiring inrush control.

Technical Context

The MP6219DN-LF-P implements a sense-FET–based current-limit architecture where RPRGM sets both trip (3.0A max) and hold (2.0A typ) currents. Its charge-pump gate driver enables full enhancement of the internal 44mΩ FET at 5V input, eliminating external bias requirements.

Thermal shutdown (175°C) is latched and reset only by pulling EN/FAULT low or cycling VIN below UVLO (3.6V). The EN/FAULT pin operates as a three-level interface: low (disable/clear fault), mid (thermal fault signal), high (enable), with 28µA internal pull-up-no external resistor needed.

Key Specifications

Pinout & Package

MP6219DN-LF-P is housed in an SOIC8E package with exposed thermal pad (8-pin, 150 mil width), optimized for PCB heat dissipation via soldered thermal vias under the pad. θ_JA = 50°C/W on 4-layer JEDEC board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable current-limit power switch applications.

Compared with MP5075GQ, MP6219DN-LF-P offers simpler resistor-based programming and analog fault signaling but lacks digital configurability and lower R_DS(on); versus TPS2557DRCT, it provides superior system-level protection (OV clamp, thermal latch, bidirectional fault bus) at the cost of slightly higher conduction loss.

Availability

MP6219DN-LF-P is available at Aetrix Electronics and suitable for USB power distribution, notebook PC power sequencing, and heavy capacitive load management requiring stable component supply and long-term industrial availability.

Supply support for MP6219DN-LF-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MP6219 belongs to MPS's programmable power switch product line, engineered for robust 5V rail protection in computing and peripheral interfaces where analog simplicity, thermal resilience, and UL safety compliance are critical.

FAQ

What is the maximum continuous current MP6219DN-LF-P can sustain without thermal shutdown?

At ambient temperature of 25°C with proper PCB thermal design (SOIC8E θ_JA = 50°C/W), MP6219DN-LF-P sustains 2A continuously with only +8.8°C temperature rise. Sustained 2A hold current is thermally safe; however, short-circuit conditions (5V × 2A = 10W) will trigger thermal shutdown unless heatsinking is added.

How does the EN/FAULT pin indicate thermal fault?

During thermal shutdown, the EN/FAULT pin is actively driven to a mid-level voltage (0.80–2.0V, typically ~1.6V), distinct from low (disable) and high (enable). This allows monitoring circuits to detect thermal events without additional sensors or ADC channels.

Can MP6219DN-LF-P be used with input voltages other than 5V?

The device is optimized for 5V ±10% (4.5–5.5V) operation per recommended conditions. Absolute maximum input is 8V, but UVLO (3.2–4.0V), overvoltage clamp (5.95–7.35V), and R_DS(on) derating above 5.5V make operation outside 4.5–5.5V non-recommended for reliable performance.

What is the role of the N.C. pin (Pin 6)?

Pin 6 is a true no-connect terminal with no internal bond wire or circuit connection. It must remain unconnected on PCB layout-neither tied to GND nor left floating with traces-to avoid unintended coupling or mechanical stress on the package.

How is current limit set, and what resistor value yields 2A hold current?

Hold current is set by resistor RPRGM between IPRGM (Pin 5) and OUT. Per datasheet Table 1, a 24Ω resistor yields 2.0A hold current and 3.0A trip current at VIN = 5V. Resistor tolerance directly impacts current accuracy; 1% metal-film is recommended.

Does MP6219DN-LF-P require an external pull-up on EN/FAULT?

No. The EN/FAULT pin includes a 28µA internal current source that pulls the pin high when not driven externally. This eliminates the need for an external pull-up resistor, simplifying layout and reducing component count in multi-device fault-bus configurations.

Is MP6219DN-LF-P RoHS compliant and lead-free?

Yes. The "-LF" suffix denotes lead-free and RoHS-compliant packaging. The device meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.