Monolithic Power Systems Inc. MP8110DK-LF-P

Overview

MP8110DK-LF-P from Monolithic Power Systems is a precision high-side current-sense amplifier operating from 2.5V to 40V supply, featuring 1.4V–40V input common-mode range independent of VCC, 400µV typical input offset voltage, and dual buffered outputs (OUT1 for resistive loads, OUT2 for capacitive loads). It enables accurate battery discharge monitoring in portable electronics with minimal ground-path interference.

For engineers reviewing the MP8110DK-LF-P datasheet, MP8110DK-LF-P pinout, MP8110DK-LF-P application, or MP8110DK-LF-P equivalent, key selection criteria include its wide common-mode range for deep-discharge battery sensing, ultra-low 12µA quiescent current, dual-output architecture for mixed-load interfacing, and MSOP-8 package suitability for space-constrained portable designs.

Technical Context

The MP8110 implements a precision current-sense amplifier with integrated P-channel MOSFET control and dual output buffers. Its differential input stage maintains accuracy across 1.4V–40V common-mode voltage while rejecting supply variations via 97dB PSRR at 100Hz.

It supports two distinct output paths: OUT1 delivers up to 500µA into resistive loads with rail-to-rail swing (VCC – 0.15V), while OUT2 sources up to 5mA into capacitive loads with extended swing (VCC – 1V), enabling simultaneous analog signal conditioning and fast transient response.

Key Specifications

Pinout & Package

MP8110DK-LF-P is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.0mm height), optimized for high-density portable PCB layouts and thermally efficient operation (θJA = 150°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current-sense amplifier applications.

Compared with INA219BIDR and MAX4080TASA+, MP8110DK-LF-P uniquely balances ultra-low 12µA supply current, dual analog outputs for mixed-signal interfacing, and 1.4V–40V common-mode range - making it optimal for battery-powered systems requiring both precision DC monitoring and dynamic transient response without MCU overhead.

Availability

MP8110DK-LF-P is available at Aetrix Electronics and suitable for portable PCs, smart battery packs, and energy management systems requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.

Supply support for MP8110DK-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 core expertise in DC-DC conversion, LED drivers, and precision analog sensing solutions.

The MP8110 belongs to MPS's precision current-sense amplifier product line, engineered specifically for high-side battery current monitoring in space- and power-constrained portable electronics where ground-path integrity and deep-discharge operation are critical.

FAQ

What is the maximum sense resistor voltage drop supported by MP8110DK-LF-P?

The MP8110DK-LF-P supports a maximum differential input voltage of 5V across RG1–RG2, but practical design limits V_SENSE to ≤250mV to maintain accuracy and avoid exceeding absolute maximum ratings. At 100mV sense voltage, current measurement error remains within ±5% due to input offset and gain tolerance.

Can MP8110DK-LF-P operate with a 1.8V supply?

No - MP8110DK-LF-P requires a minimum supply voltage of 2.5V per its Absolute Maximum Ratings and Recommended Operating Conditions. Operation below 2.5V is not characterized and may result in undefined behavior or failure to enable internal bias circuits.

How does the dual-output architecture improve system design?

OUT1 provides low-noise, high-precision DC output for battery fuel gauging and slow-control loops, while OUT2 delivers fast transient response for real-time load event detection and protection triggering. This eliminates need for external op-amps or signal conditioning stages.

Is the MSOP-8 package thermally adequate for continuous 5mA OUT2 loading?

Yes - with θ_JA = 150°C/W and max power dissipation of 800mW at T_A = 70°C, the MSOP-8 package safely handles 5mA into typical capacitive loads at V_CC ≤ 24V, resulting in <100mW junction power and <15°C temperature rise above ambient.

Does MP8110DK-LF-P require external compensation components?

No external compensation is required for basic operation. The datasheet recommends optional 100pF CGS capacitor between RG1 and RG2 for noise filtering, and 100pF COUT on OUT1/OUT2 for stability with capacitive loads - but these are application-specific, not mandatory.

What is the function of the NC pin (Pin 2) in the MSOP-8 package?

Pin 2 is internally unconnected and must remain electrically floating. Grounding or driving this pin may introduce parasitic coupling or leakage paths that degrade common-mode rejection and offset performance - it should be left unpopulated or tied to ground only if required by PCB stack-up rules.

How does the shutdown feature interact with output states?

When SHDN is pulled high (>0.9V), both OUT1 and OUT2 enter high-impedance state, and supply current drops to ≤6µA. Outputs do not actively drive low - external pull-downs may be needed if downstream circuitry requires defined logic levels during shutdown.