Monolithic Power Systems Inc. MP62170ES-LF-Z

Overview

MP62170ES-LF-Z from Monolithic Power Systems is a single-channel, current-limited power distribution switch with 1.5A continuous load capability, 75mΩ R_DS(ON), and active-low enable logic. It operates from 2.7V to 5.5V input, integrates thermal shutdown and under-voltage lockout, and delivers precise current limiting (typ. 2.3A short-circuit trip) for USB VBUS and portable device power rail protection.

For engineers reviewing the MP62170ES-LF-Z datasheet, MP62170ES-LF-Z pinout, MP62170ES-LF-Z application, or MP62170ES-LF-Z equivalent, key selection criteria include guaranteed 1.5A continuous current, 8ms FLAG deglitch timing, reverse current blocking, SOIC8 package thermal performance (θ_JA = 90°C/W), and compatibility with USB power-distribution and hot-swap systems requiring fault reporting and robust overcurrent recovery.

Technical Context

The MP62170ES-LF-Z implements an integrated N-channel MOSFET power switch with internal current-sense amplifier and charge-pump gate driver. Its constant-current limiting activates at ≥2.5A (ramped load), transitioning to thermal shutdown only if sustained overload raises junction temperature beyond 140°C.

It features an open-drain FLAG output with 8ms deglitch filtering to suppress transient faults, UVLO with 1.95V rising-edge threshold and 250mV hysteresis, and reverse-current blocking that limits leakage to 0.2µA when V_OUT = 5.5V and V_IN = GND - enabling safe sequencing in multi-rail systems.

Key Specifications

Pinout & Package

MP62170ES-LF-Z is housed in an 8-pin SOIC package (5.0mm × 6.2mm, 1.27mm pitch) with no exposed pad. Thermal resistance θ_JA = 90°C/W on standard 4-layer PCB per JESD51-7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and NCP45520MUTBG, MP62170ES-LF-Z uniquely balances 75mΩ conduction loss, 8ms robust FLAG filtering, reverse-current blocking, and SOIC8 thermal performance - making it optimal for USB and portable electronics where fault fidelity and sequencing safety are critical.

Availability

MP62170ES-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot-swap, and notebook subsystem power applications requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP62170ES-LF-Z 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 design centers in the US, China, and Taiwan.

The MP62170/MP62171 product line targets compact, reliable power distribution in portable and interface-sensitive systems - emphasizing accurate current limiting, integrated fault reporting, and robust thermal management without external components.

FAQ

What is the maximum allowable input voltage for MP62170ES-LF-Z?

The absolute maximum IN voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage per Absolute Maximum Ratings. The UVLO circuit disables the switch below 1.95V, ensuring clean startup only within the specified supply window.

Does MP62170ES-LF-Z support reverse current flow from OUT to IN?

Yes - MP62170ES-LF-Z provides reverse current blocking with leakage limited to 0.2µA when V_OUT = 5.5V and V_IN = GND. This feature prevents backfeeding in multi-rail systems where output nodes may be powered before the input rail is active.

How does the FLAG pin behave during thermal shutdown versus overcurrent events?

FLAG asserts low after 8ms deglitch timeout for both overcurrent and thermal shutdown events. It remains low until the fault condition clears and internal circuits reset - no distinction is encoded in the FLAG signal itself; system firmware must correlate timing and context to diagnose root cause.

Can MP62170ES-LF-Z drive capacitive loads up to 100µF without instability?

Yes - the datasheet specifies 3ms typical turn-on time and 10ms turn-off time with CL = 100µF and RL = 5.5Ω. Internal slew-rate control and charge-pump gate drive ensure monotonic V_OUT transitions without ringing, even with large bulk capacitance on the output rail.

Is the EN* pin compatible with 1.8V logic systems?

No - EN* requires a logic high ≥2.0V to disable the device (since it is active-low). With a 1.8V system, EN* will remain asserted (enabled) continuously. A level-shifter or pull-up to ≥2.0V is required for full control in 1.8V logic domains.

What is the thermal shutdown recovery behavior?

After thermal shutdown at 140°C, MP62170ES-LF-Z remains latched off until junction temperature falls to approximately 120°C due to built-in 20°C hysteresis. Recovery is automatic and does not require toggling EN* - output resumes once thermal margin is restored.

How does the current-limiting mechanism respond to rapidly ramped loads?

The current-limit circuit triggers at ≥2.5A for loads with slew rate ≤100A/s. For faster transients, response occurs within 10µs (per Figure 6), entering constant-current mode before thermal accumulation - protecting both load and switch during surge events like hot-plug insertion.