Monolithic Power Systems Inc. MP62171ES-1-LF-P

Overview

MP62171ES-1-LF-P from Monolithic Power Systems is a single-channel, active-high enable, current-limited power distribution switch with 1.5A continuous load current capability, 75mΩ R_DS(ON), and 2.7V–5.5V input range. It integrates over-current protection with 2.3A typical short-circuit trip, thermal shutdown at 140°C, and reverse current blocking-designed for USB VBUS power control in portable electronics.

For engineers reviewing the MP62171ES-1-LF-P datasheet, MP62171ES-1-LF-P pinout, MP62171ES-1-LF-P application, or MP62171ES-1-LF-P equivalent, key selection criteria include guaranteed 1.5A continuous current limit, 8ms FLAG deglitch time to suppress false fault reporting, active-high EN logic compatibility with standard microcontrollers, and SOIC8 package suitability for space-constrained USB power rail designs.

Technical Context

The MP62171ES-1-LF-P implements an integrated N-channel MOSFET power switch with internal current-sense amplifier and charge-pump gate driver. Its constant-current limiting activates when output load exceeds ~2.3A (typ), transitioning from linear regulation to stable current sink mode without latch-off.

Thermal protection operates independently: junction temperature exceeding 140°C triggers automatic shutdown with 20°C hysteresis, while under-voltage lockout (UVLO) disables operation below 1.95V (rising edge) to prevent erratic switching during brown-out conditions.

Key Specifications

Pinout & Package

MP62171ES-1-LF-P is housed in an 8-pin SOIC package (body size 4.90mm × 3.90mm, lead pitch 1.27mm) with no exposed thermal pad. Pin assignments are validated per MPS Rev.0.9 datasheet and functional block diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22965DRLR and AP22653AW5-7, MP62171ES-1-LF-P uniquely combines reverse current blocking, UVLO, and 8ms deglitch in a single SOIC8 footprint-enabling robust, self-contained USB VBUS control without external components.

Availability

MP62171ES-1-LF-P is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral switching, and notebook PC subsystem power requiring stable component supply across industrial temperature ranges (-20°C to +85°C).

Supply support for MP62171ES-1-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 power ICs, with design centers in the US, China, and Taiwan.

The MP6217x series belongs to MPS's protected power switch product line, engineered specifically for reliable, current-limited load switching in portable and USB-powered systems where fault containment and thermal resilience are critical.

FAQ

What is the maximum allowable continuous current for MP62171ES-1-LF-P at 85°C ambient?

The device delivers 1.5A continuously at TA = +85°C in SOIC8 package, verified by thermal resistance θJA = 90°C/W and maximum junction temperature of 150°C. Derating is not required within this specification limit, as internal current limiting and thermal shutdown ensure safe operation even under sustained overload.

Does MP62171ES-1-LF-P require an external pull-up resistor on the FLAG pin?

Yes - FLAG is an open-drain output and requires an external pull-up resistor (typically 10kΩ to VIN) to generate a valid logic-high signal during normal operation. The internal circuit pulls FLAG low only during deglitched over-current or thermal fault events, making external bias essential for proper fault reporting.

Can MP62171ES-1-LF-P be used with a 3.3V input supply?

Yes - its 2.7V–5.5V input range fully supports 3.3V operation. At VIN = 3.3V, R_DS(ON) remains ≤130mΩ (max), delivering ≥1.2A continuous current while maintaining UVLO disable threshold (1.95V) and EN logic compatibility (2V high/0.8V low).

How does the 8ms FLAG deglitch time affect short-circuit response?

The 8ms deglitch window prevents false FLAG assertion during brief transients (e.g., capacitive inrush). True short circuits sustaining >2.3A for ≥8ms trigger FLAG low; faster events are ignored. This balances responsiveness with noise immunity, eliminating need for external RC filtering in most USB applications.

Is reverse current blocking active during device disable?

Yes - reverse current blocking functions whenever the device is disabled (EN low) or powered off (VIN < UVLO threshold). With VIN = GND and VOUT = 5.5V, reverse leakage is limited to 0.2µA, protecting upstream supplies from backfeed without requiring external diodes.

What is the thermal shutdown recovery behavior?

Upon reaching 140°C junction temperature, MP62171ES-1-LF-P shuts off the output MOSFET and holds OFF until die temperature falls to ~120°C (20°C hysteresis). Recovery is automatic and does not require EN toggling or power cycle, enabling graceful self-recovery after transient overloads.