Monolithic Power Systems Inc. MP8110DS-LF

Overview

MP8110DS-LF from Monolithic Power Systems is a precision high-side current-sense amplifier with 1.4V–40V input common-mode range, 12µA typical supply current, and dual outputs (OUT1 for resistive loads, OUT2 for capacitive loads). It operates from 2.5V to 40V and delivers ±2% current accuracy at 100mV sense voltage-used in battery-powered portable electronics for accurate load-current monitoring without ground-path disruption.

For engineers reviewing the MP8110DS-LF datasheet, MP8110DS-LF pinout, MP8110DS-LF application, or MP8110DS-LF equivalent, key selection criteria include input common-mode independence from supply voltage, dual-output drive capability, shutdown current <6µA, 400µV max input offset, and SOIC8 package compatibility with space-constrained battery management systems.

Technical Context

The MP8110DS-LF implements a high-precision current-sense architecture using internal P-channel MOSFET feedback to maintain equal current through RG1 and RG2, enabling gain setting via external resistor ratio (RGS/RG1). Its input stage operates independently of VCC, supporting sensing down to 1.4V common-mode-critical for 2-cell Li-ion packs in deep discharge.

It features two dedicated output stages: OUT1 optimized for low-impedance resistive loads (500µA max sink/source), and OUT2 designed for higher-current capacitive loads (5mA max), each with separate output voltage ranges (VCC – 0.15V and VCC – 1V respectively) and distinct rise/fall times (17–29µs).

Key Specifications

Pinout & Package

MP8110DS-LF is housed in an 8-pin SOIC package (JEDEC MS-012, variation AA), with 1.27mm lead pitch and 3.9mm × 4.9mm body size. Pin 1 marked by notch or bevel; leads are RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the MP8110DS-LF uniquely combines dual analog outputs, 12µA quiescent current, and supply-independent 1.4V–40V common-mode range-making it optimal for compact, battery-sensitive designs requiring both precision feedback and active control paths.

Availability

MP8110DS-LF is available at Aetrix Electronics and suitable for smart battery packs, portable PCs, and cell phone power management systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP8110DS-LF 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, founded in 1997 and headquartered in Kirkland, Washington.

The MP8110 belongs to MPS's precision current-sense amplifier product line, engineered specifically for high-efficiency, space-constrained battery monitoring in portable electronics-emphasizing ultra-low IQ, wide common-mode range, and dual-output flexibility.

FAQ

What is the minimum input common-mode voltage supported by MP8110DS-LF?

The MP8110DS-LF supports a minimum input common-mode voltage of 1.4V, verified across temperature and supply conditions. This allows accurate current sensing in deeply discharged 2-cell Li-ion batteries (down to ~1.4V total pack voltage) without loss of functionality or increased offset error.

Can MP8110DS-LF be used with a single 3.3V supply?

Yes-MP8110DS-LF operates from 2.5V to 40V, so a 3.3V supply is fully supported. At 3.3V, the input common-mode range remains 1.4V–3.3V, and OUT1/OUT2 output swing is specified down to VCC – 0.15V and VCC – 1V respectively, ensuring compatibility with 3.3V ADCs and logic interfaces.

How does the dual-output architecture improve system design?

OUT1 drives high-impedance, low-noise nodes like ADC inputs or comparator references, while OUT2 directly controls MOSFET gates or load switches. This separation avoids loading-induced errors on precision paths and eliminates need for external buffers-reducing BOM count and PCB area in portable power systems.

Is the NC pin (Pin 2) required to be left floating?

Yes-Pin 2 is internally unconnected. Per MPS layout guidelines, it must remain unconnected (floating) or be tied to GND for mechanical stability; routing signals or applying voltage risks undefined behavior or ESD vulnerability.

What is the recommended gain-setting resistor value for 1A full-scale sensing?

For 1A full-scale with 100mV sense voltage (RS = 100mΩ), the datasheet specifies RG1 = RG2 = 2kΩ and RGS = 20kΩ, yielding gain = 10. This configuration achieves ±2% accuracy and keeps OUT1 within its 500µA drive limit while maintaining thermal stability in SOIC8 package.

Does MP8110DS-LF require external compensation components?

No external compensation is required for basic operation. The device integrates internal frequency compensation. However, the datasheet recommends optional CGS (100pF) and COUT (100pF) capacitors to optimize transient response and reduce noise coupling-especially when driving long traces or capacitive loads.

How does shutdown mode affect OUT1 and OUT2 outputs?

When SHDN is high (>1.2V), both OUT1 and OUT2 enter high-impedance state-neither sourcing nor sinking current. Output voltages float, and internal amplifier bias is disabled, reducing total supply current to ≤6µA. No pull-up/down resistors are needed unless system logic requires defined idle states.