Monolithic Power Systems Inc. MP62341DS-1-LF-Z

Overview

MP62341DS-1-LF-Z from Monolithic Power Systems is a dual-channel, current-limited power distribution switch with active-low enable inputs, 1A continuous per channel, 85mΩ R_DS(ON), and integrated output discharge (100Ω path). It operates from 2.7V to 5.5V input and delivers precise current limiting (1.1–2.2A trip range) with thermal shutdown at 140°C for USB power distribution and hot-swap applications.

For engineers reviewing the MP62341DS-1-LF-Z datasheet, MP62341DS-1-LF-Z pinout, MP62341DS-1-LF-Z application, or MP62341DS-1-LF-Z equivalent, key selection criteria include guaranteed 1A per channel current limit, dual independent FLAG outputs with 8ms deglitch, reverse current blocking, and SOIC8 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The MP62341DS-1-LF-Z integrates two independent high-side N-channel MOSFET switches with matched current-sense amplifiers and thermal sensing circuitry. Each channel features separate EN* (active-low) control and open-drain FLAG* fault reporting with internal 8ms deglitch filtering.

Its UVLO triggers at 1.95V (rising), hysteresis is 250mV, and it provides under-voltage lockout, reverse current blocking, and output discharge activation only when disabled - not during normal operation or short-circuit events.

Key Specifications

Pinout & Package

MP62341DS-1-LF-Z is housed in an 8-pin SOIC package without exposed pad (JEDEC MS-012 AA), footprint-compatible with standard SOIC-8 land patterns and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDR and NCP45520MUTBG, MP62341DS-1-LF-Z uniquely combines dual-channel integration, per-rail FLAG reporting, guaranteed 1A current limit, and built-in discharge in a single SOIC8 package - reducing component count, PCB area, and firmware overhead for USB and hot-swap designs.

Availability

MP62341DS-1-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot-swap, and notebook subsystem power gating requiring stable component supply, full RoHS compliance, and industrial temperature support.

Supply support for MP62341DS-1-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, and global manufacturing partnerships.

The MP6234x series targets compact, reliable power distribution in portable and embedded systems - delivering integrated protection, low quiescent current, and robust fault handling without external components.

FAQ

What is the difference between MP62341DS-1-LF-Z and MP62340DS-1-LF-Z?

The MP62341DS-1-LF-Z is the active-low enable variant (EN1*, EN2*) of the MP62340 family, explicitly designated in the ordering table as the "Active Low Dual" version. The MP62340DS-1-LF-Z does not exist as a distinct part - the base part number MP62340-1 refers to the same active-low device. The -Z suffix denotes tape-and-reel packaging, and -LF indicates lead-free RoHS compliance.

Does MP62341DS-1-LF-Z support 3.3V-only operation?

Yes. MP62341DS-1-LF-Z operates across 2.7V to 5.5V input, making it fully compatible with 3.3V systems. At 3.3V, its typical R_DS(ON) remains ≤130mΩ (–40°C to +85°C), delivering <430mW conduction loss at 1A, well within SOIC8 thermal limits with standard PCB copper.

Can FLAG1 and FLAG2 be wire-OR'd together?

No. FLAG1 and FLAG2 are independent open-drain outputs with no internal isolation diodes. Wire-OR'ing would cause cross-talk: a fault on one channel could falsely assert the other FLAG if pull-up resistors differ or leakage paths exist. Each FLAG requires its own pull-up and MCU interrupt pin for accurate fault attribution.

Is output discharge active during thermal shutdown?

No. Output discharge activates only when the device is disabled - either via EN* high or IN falling below UVLO (1.95V). During thermal shutdown, the switch remains latched off but discharge is inactive; the output capacitor discharges only through the load or external paths.

What is the maximum capacitive load supported on OUT1/OUT2?

The datasheet validates performance with 100μF output capacitance and 5.5Ω load. For larger loads (e.g., 470μF), turn-off time extends to ~10ms and inrush current rises - but remains within safe operating area if input bulk capacitance ≥10μF is used and slew rate is limited by series resistance or layout inductance.

Does MP62341DS-1-LF-Z require external compensation?

No. MP62341DS-1-LF-Z is fully self-contained with internal current-sense amplifiers, thermal sensors, UVLO comparators, and deglitch timers. No external capacitors, resistors, or feedback networks are required for basic operation, current limiting, or fault reporting.

How is reverse current blocking implemented?

Reverse current blocking is achieved via internal circuitry that disables the body diode conduction path when IN = GND and OUTx > 0V. This prevents backfeed from powered peripherals into a shut-down or disconnected host supply, verified down to 0.2μA leakage at V_OUT = 5.5V.