Monolithic Power Systems Inc. MP6402DN-EF-LF

Overview

MP6402DN-EF-LF from Monolithic Power Systems is a dual-channel, high-PSRR (60dB at 100Hz) linear regulator delivering up to 500mA per channel with ±1.5% output voltage accuracy and integrated reset monitoring on OUT2. It operates from 2.5V–5.5V input, supports fixed output voltages (e.g., 1.8V/2.5V), and includes programmable reset delay via external capacitor. Used in portable GPS and wireless devices for stable dual-rail power with system-level reset coordination.

For engineers reviewing the MP6402DN-EF-LF datasheet, MP6402DN-EF-LF pinout, MP6402DN-EF-LF application, or MP6402DN-EF-LF equivalent, this page provides verified technical context, SOIC8E package details, reset timing design guidance, LDO noise performance (15µVRMS), and real-world selection criteria for dual-output power management in space-constrained embedded systems.

Technical Context

The MP6402 integrates two independent P-channel MOSFET-based LDOs with separate current limiting and thermal shutdown circuits. Each channel delivers regulated output with dropout voltage as low as 260mV at 500mA load and maintains ±1.5% accuracy across –40°C to +125°C junction temperature.

Its dedicated reset circuit monitors only OUT2 voltage, asserting an open-drain active-low RESET signal when VOUT2 falls below 92.5% of nominal value. Reset delay is set externally via capacitor on ExtCap pin (e.g., 3300pF yields 1.4–2.8ms delay), and thermal shutdown engages at 150°C with hysteresis recovery at 130°C.

Key Specifications

Pinout & Package

MP6402DN-EF-LF uses the SOIC8E package (exposed pad, 8-pin, 3.9mm × 4.9mm), optimized for thermal dissipation in compact PCB layouts. The exposed pad must be soldered to a ground plane for effective heat transfer and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-LDO-with-reset applications.

Compared with XC6223D182MR-G and RT9013-18PB, MP6402DN-EF-LF uniquely combines dual 500mA outputs, ±1.5% accuracy, programmable reset delay, and 60dB PSRR in one SOIC8E package-enabling compact, robust power sequencing without external support components.

Availability

MP6402DN-EF-LF is available at Aetrix Electronics and suitable for portable GPS receivers, wireless communication modules, and Blu-ray player logic boards requiring stable component supply across automotive and industrial temperature ranges.

Supply support for MP6402DN-EF-LF 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 two decades of leadership in DC-DC converters, LDOs, and motor drivers.

The MP6402 belongs to MPS's precision dual-LDO product line, designed specifically for space-constrained embedded systems needing coordinated power and reset management without external supervision circuitry.

FAQ

What is the maximum allowable input voltage for MP6402DN-EF-LF?

The absolute maximum input voltage is 6V, but the recommended operating range is 2.5V to 5.5V. Exceeding 5.5V risks violating safe operating area limits, especially at high ambient temperatures or heavy loads, and may trigger thermal shutdown prematurely.

Can OUT1 and OUT2 be set to the same voltage, such as 1.8V/1.8V?

Yes-per Table 1 in the datasheet, code "E" configures both outputs to 1.8V. However, the reset circuit monitors only OUT2, so identical voltages are acceptable only when both rails require synchronized reset behavior and OUT2 remains the designated monitored rail.

How does the ExtCap pin affect reset timing accuracy?

Reset delay time depends linearly on external capacitance: T_D ≈ 0.1 + 6.0 × C₄(nF) ms. Stray capacitance and capacitor leakage directly impact accuracy; use X7R/X5R ceramics with ≤100pA leakage and minimize PCB trace length to ExtCap for ±10% timing tolerance.

Is the RESET pin compatible with 1.8V logic systems?

Yes-the RESET pin is open-drain with VOL ≤ 0.2V at 2mA sink current, allowing direct interface to 1.8V, 2.5V, or 3.3V logic families when pulled up to the target VCC. No level-shifting circuitry is required.

Does MP6402DN-EF-LF support reverse current blocking?

No-it lacks integrated reverse current protection. If OUT2 voltage exceeds IN (e.g., during hot-swap or backup battery scenarios), current can flow backward through the pass FET. External Schottky diodes or ideal diode controllers are required for reverse-blocking applications.

What is the minimum recommended output capacitor for stable operation?

A 3.3µF ceramic capacitor with ESR < 0.5Ω is the minimum specified for stability. Larger values (up to 10µF) improve load transient response and reduce output noise, but do not degrade stability-no series resistance or tantalum alternatives are needed.

How does thermal shutdown interact with the RESET signal?

Thermal shutdown forces RESET to assert low immediately, independent of OUT2 voltage. This provides fail-safe system reset during overtemperature faults, ensuring controlled shutdown even if the monitored rail remains within specification during thermal stress.