Monolithic Power Systems Inc. MP5006EQ-LF-Z

Overview

MP5006EQ-LF-Z from Monolithic Power Systems is a programmable current-limit power switch IC designed for hot-swap and load protection in 5V systems. It integrates a 44mΩ DMOS FET, adjustable 1.2–3.7A current limit (via external resistor), 1.1ms default output slew rate (dv/dt pin), under-voltage lockout (3.2–4.0V), and over-voltage clamping (5.0–5.9V). Used in SSDs and laptop peripheral rails to prevent inrush damage and short-circuit faults.

For engineers reviewing the MP5006EQ-LF-Z datasheet, MP5006EQ-LF-Z pinout, MP5006EQ-LF-Z application, or MP5006EQ-LF-Z equivalent, this page delivers verified electrical specs, thermal shutdown behavior, enable/fault pin logic, ILIMIT resistor mapping, and QFN10 package layout guidance - all critical for robust 5V rail protection design.

Technical Context

The MP5006EQ-LF-Z implements a sense-FET-based current-limit architecture with internal charge-pump gate drive enabling low R_DS(on) (44mΩ typ.) and fast trip response (<100μs). Its bi-directional Enable/Fault pin combines input control (0.5V/2.5V thresholds) and open-drain fault reporting with automatic thermal retry cycling.

UVLO (3.6V typ.) and output voltage clamping (5.4V typ.) operate independently of enable state; dv/dt-controlled ramp time scales linearly with external capacitor (1.1ms to 23.5ms); current limit is set by resistor between +ILIMIT and –ILIMIT pins per Table 1 (e.g., 24Ω → 1.55A hold / 3A trip).

Key Specifications

Pinout & Package

MP5006EQ-LF-Z uses a thermally enhanced QFN10 (3mm × 3mm) package with exposed VIN pad for low-θ_JA (50°C/W) and high-current routing. The 10-pin layout prioritizes power path integrity: VOUT pins (1–5) are paralleled for low-inductance output, VIN (11) connects to exposed pad, and GND (10) provides reference return.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259211RGER and RT9711CGQW, MP5006EQ-LF-Z uniquely combines programmable slew rate, resistor-adjustable current limit, and thermal auto-retry in a single QFN10 package - making it optimal for space-constrained, self-healing 5V load-protection applications.

Availability

MP5006EQ-LF-Z is available at Aetrix Electronics and suitable for hot-swap card insertion, SSD power rail protection, and laptop USB-C peripheral hub designs requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.

Supply support for MP5006EQ-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 expertise in DC/DC conversion, load switching, and motor control.

The MP5006 belongs to MPS's programmable load switch product line, engineered specifically for robust 5V rail protection in computing and storage systems where inrush control, fault autonomy, and thermal resilience are critical.

FAQ

What is the default output rise time when the dv/dt pin is left unconnected?

When the dv/dt pin is left floating (no external capacitor), the internal circuit provides a default rise time of 1.1ms (typical), measured from 10% to 90% of VOUT. This value is guaranteed across temperature and input voltage per datasheet Rev. 0.92, Section "dv/dt Circuit Rise Time".

How does the Enable/Fault pin behave during thermal shutdown?

During thermal shutdown, the Enable/Fault pin is actively driven low by internal circuitry. After die temperature falls below the hysteresis threshold (~155°C), the pin releases and is pulled high by an internal 25μA current source - enabling automatic retry without external intervention.

Can MP5006EQ-LF-Z operate with a 12V input supply?

No - absolute maximum VIN is 22V, but recommended operating range is strictly 4V to 10V. At 12V input, the internal overvoltage clamp (5.4V typ.) cannot protect downstream 5V logic, and UVLO may not engage reliably. Operation outside 4–10V violates recommended conditions and risks functional failure.

What is the minimum hold current achievable with an external ILIMIT resistor?

Using a 100Ω resistor between +ILIMIT and –ILIMIT yields a hold current of 0.38A (min), per Table 1 in the datasheet. This setting is valid across –20°C to +85°C ambient and maintains stable current limiting without latch-up or oscillation.

Is an external pull-up resistor required on the Enable/Fault pin?

No - the Enable/Fault pin features an internal 25μA pull-up current source. When enabled and fault-free, it rises to ~5V (clamped) without external components. An external pull-up is unnecessary and may interfere with fault signaling.

How does the MP5006 respond to a short circuit at VOUT?

Upon short detection, MP5006 immediately limits current to the programmed hold level (e.g., 1.55A at 24Ω), dissipating up to 7.75W. If thermal shutdown triggers (175°C), it cycles: disable → cool → auto-retry. Each cycle is visible as Enable/Fault pin toggling low-high-low.

What PCB layout practices are critical for thermal performance?

Key practices include: (1) connecting the exposed VIN pad to a large copper pour with ≥4 thermal vias; (2) placing R_LIMIT within 2mm of ILIMIT pins; (3) routing VOUT pins (1–5) in parallel with wide traces; and (4) keeping dv/dt and GND traces short and direct - per Figure 4 in datasheet Rev. 0.92.