Monolithic Power Systems Inc. MP8200DT-LF-Z

Overview

MP8200DT-LF-Z from Monolithic Power Systems is a 1.0V fixed-output, ±1% initial accuracy precision shunt voltage regulator in SOT23-3 package. It operates from 1V to 12V input, delivers stable 1.0V reference with <0.5Ω dynamic output resistance and 100µA minimum operating current, and is optimized for low-power instrumentation and battery-powered systems requiring ultra-low-voltage reference stability.

For engineers reviewing the MP8200DT-LF-Z datasheet, MP8200DT-LF-Z pinout, MP8200DT-LF-Z application, or MP8200DT-LF-Z equivalent, key selection criteria include its 1.0V output tolerance, 0.5Ω dynamic impedance, –40°C to +85°C operating range, no-external-capacitor stability, and TRIM pin functionality for ±0.5% output adjustment in precision analog circuits.

Technical Context

The MP8200DT-LF-Z implements a bandgap-based shunt regulation architecture with sharp turn-on behavior and low temperature coefficient (85 ppm/°C). Its internal reference is trimmed at wafer level to achieve ±1% initial accuracy across the full industrial temperature range.

It functions as a two-terminal (cathode/anode) shunt device with a third TRIM terminal enabling external fine-tuning of output voltage. The device maintains regulation without external capacitors and exhibits 4 µV p-p noise (0.1Hz–10Hz) and 10 µs turn-on settling time within 0.1% of final value.

Key Specifications

Pinout & Package

MP8200DT-LF-Z is housed in a surface-mount SOT23-3 package with gull-wing leads, rated for –40°C to +85°C operation and 240°C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision shunt reference applications.

Compared with MP8201DT-LF-Z, the MP8200DT-LF-Z offers proven reliability in legacy systems but lacks the tighter accuracy and lower drift of the newer variant; versus TLV431ACDBVR, it provides true 1.0V fixed output without external components but cannot be adjusted above 1.0V.

Availability

MP8200DT-LF-Z is available at Aetrix Electronics and suitable for battery-powered medical sensors, high-resolution data acquisition systems, and notebook system power management requiring stable component supply across extended product lifecycles.

Supply support for MP8200DT-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 mixed-signal ICs for power management, motor drive, and sensing applications.

The MP8200 belongs to MPS's precision voltage reference product line, engineered specifically for ultra-low-voltage (<1.2V), low-quiescent-current shunt regulation in portable and instrumentation systems.

FAQ

Is MP8200DT-LF-Z still recommended for new designs?

No. Monolithic Power Systems explicitly states "NOT RECOMMENDED FOR NEW DESIGNS" and directs users to MP8201DT-LF-Z. The MP8200DT-LF-Z remains available for legacy production and repair, but MP8201 offers improved accuracy (±0.5%), lower temperature coefficient (50 ppm/°C), and continued long-term support.

Can the TRIM pin be left unconnected?

Yes. Pin 3 (TRIM) is internally disconnected from the reference core and may be left floating or tied to V– without affecting nominal 1.0V output. It is only used when ±0.5% external adjustment is required via potentiometer or DAC-connected resistor network.

What is the maximum power dissipation at 85°C ambient?

At TA = +85°C, maximum continuous power dissipation is 270 mW, calculated as PD(MAX) = (TJ(MAX) – TA)/θJA = (150°C – 85°C)/240°C/W = 0.271 W. This assumes standard PCB layout with 1"² of 1 oz copper.

Does MP8200DT-LF-Z require an external capacitor for stability?

No. The device is internally compensated and remains stable with no external capacitor across its cathode and anode terminals. Adding capacitance may improve noise rejection but is not required for regulation stability per datasheet specifications.

How does dynamic output resistance affect ADC reference performance?

A dynamic resistance of 0.5Ω means a 1mA load transient causes only 0.5mV output shift. For a 12-bit 1.0V full-scale ADC, this corresponds to <0.5 LSB error-critical for maintaining linearity during multiplexed channel switching or digital I/O noise coupling.

What is the forward diode voltage at –1mA reverse current?

The forward diode voltage (anode-to-cathode) is typically 0.65V at –1mA, as specified in Note 5 of the Electrical Characteristics table. This parameter defines the minimum voltage needed to forward-bias the internal ESD protection diodes and informs safe reverse-bias margin design.

Can MP8200DT-LF-Z be used to generate a negative reference?

Yes. By connecting V+ to system ground and V– to a negative rail (e.g., –1.0V), the device regulates a precise –1.0V reference at V– relative to ground. Bias current must be supplied via a resistor from the negative rail to V–, sized to deliver 100µA–10mA.