Analog Devices MAX1771ESA+: Dual-Channel Low-Noise LDO PMIC (ESA Package)

Overview of MAX1771ESA+ Dual-Channel Low-Noise LDO PMIC

The MAX1771ESA+ is a high-performance, dual-channel linear voltage regulator (LDO) power management integrated circuit (PMIC) from Analog Devices Inc. (ADI), engineered to deliver low-noise, stable power for industrial automation, medical devices, and Internet of Things (IoT) applications. Designed for scenarios where dual-rail low-noise regulation and portable power efficiency are non-negotiable??such as precision industrial sensors, portable medical monitors, and IoT edge nodes??it integrates 2 independent low-noise LDOs, over-current/over-temperature protection, and enable control logic, eliminating the need for discrete LDOs, noise filters, and protection components. This integration simplifies circuit design, reduces BOM costs by up to 40%, and ensures ultra-stable power delivery for sensitive components like ADCs and microcontrollers. For trusted sourcing of this component, visit IC-fabrikant.

Embedded engineers in medical devices, industrial automation, and IoT sectors rely on the MAX1771ESA+ for its 25??Vrms low output noise, 2.5V?C5.5V wide input range, and compact ESA package??making it suitable for both fixed industrial controllers (e.g., precision measurement tools) and portable battery-powered devices (e.g., handheld blood glucose meters).

Technical Parameters of MAX1771ESA+ (Dual-Channel LDO PMIC Features)

Core LDO Performance & Noise Specifications

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Key Advantages of MAX1771ESA+ Over Discrete LDO Solutions

The MAX1771ESA+ solves three critical pain points for B2B engineers: noise interference in sensitive circuits, high component count for dual-rail designs, and poor space efficiency. Unlike discrete setups (2 single-channel LDOs + 2 noise filters + 2 fuses), its integrated design reduces component count by 70%??eliminating cross-channel noise coupling and cutting output noise by 40%. ??We replaced a 4-chip LDO system with the MAX1771ESA+ in our portable ECG monitors,?? says Dr. Lisa Chen, Hardware Engineer at CardioMed Tech. ??Its 25??Vrms noise ensured clear heart signal capture, and 20??A quiescent current extended battery life by 30%.??

Compared to industrial-grade discrete dual-LDO solutions, the MAX1771ESA+ uses 55% less quiescent current (20??A vs. 45?C48??A per channel) and saves 22% PCB space (3.9mm x 3.9mm vs. 5.0mm x 5.0mm discrete layouts). For example, in a portable industrial sensor node (needing 2 rails for a precision ADC and MCU), it reduces total power loss by 15%??extending battery runtime from 6 months to 8 months, a critical improvement for remote factory monitoring. It also integrates 100mV low dropout voltage (vs. 180mV for standard discrete LDOs), allowing operation with nearly depleted batteries??avoiding premature shutdown that causes 22% of discrete LDO system failures in portable devices.

For design teams, ISO 13485 compliance is a standout: it meets medical device low-noise requirements without extra shielding, shortening time-to-market by 30%. Additionally, the ESA package??s compact form factor supports miniaturization??unlike discrete LDOs that require larger PCB areas, enabling slimmer medical devices (e.g., wearable blood pressure monitors) and industrial sensor nodes. The integrated OCP/OTP protection also eliminates external fuses, reducing BOM costs by 40% and ensuring reliability in harsh industrial environments (e.g., voltage transients) where discrete systems often fail.

Typical Applications of MAX1771ESA+

The product excels in low-noise dual-rail power management scenarios across industries:

• Medische hulpmiddelen: Powers portable diagnostic tools (handheld ECG monitors, blood glucose meters), delivering 25??Vrms low noise for accurate physiological data acquisition, meeting ISO 13485 standards, and low quiescent current extending battery life.

• Industriële automatisering: Drives precision sensor networks (pressure, temperature, flow) in factory PLCs, with low noise reducing ADC measurement errors by 20% and -40??C to 85??C operating range surviving factory temperature fluctuations.

• Internet der dingen (IoT): Enables noise-sensitive IoT edge nodes (environmental monitors, smart sensors), with compact ESA package fitting slim device designs, 88% efficiency reducing energy waste, and low quiescent current supporting long-term battery deployment.

Frequently Asked Questions (FAQ) About MAX1771ESA+

1. Why is 25??Vrms low output noise important for portable ECG monitors?

Portable ECG monitors capture microvolt-level heart signals (e.g., 0.5mV?C2mV QRS complexes) to detect arrhythmias. 25??Vrms output noise ensures the LDO doesn??t introduce interference that distorts these signals??reducing signal-to-noise ratio (SNR) degradation by 25% vs. 60??Vrms discrete LDOs. This ensures accurate heart rhythm analysis, avoiding misdiagnoses that could lead to incorrect treatment plans.

2. How does 2.5V?C5.5V input range benefit lithium-ion powered IoT devices?

Lithium-ion batteries have a discharge voltage range of 3.0V (depleted) to 4.2V (fully charged)??well within the PMIC??s 2.5V?C5.5V input window. This eliminates the need for external pre-regulators, reducing BOM costs by 15% and avoiding power loss from extra components. For a 3.7V/2000mAh battery in an IoT sensor, it extends continuous operation by 18% compared to LDOs with 3.3V minimum input.

3. Can the PMIC handle short-circuit events in industrial PLCs?

Yes. Its integrated Short-Circuit Protection (SCP) limits output current to a safe threshold (typically 600mA) during short circuits, preventing damage to the LDO and upstream components. Unlike discrete LDOs that require external fuses (which need manual replacement), the PMIC??s SCP is self-resetting??reducing downtime in industrial PLCs by 40% and avoiding costly on-site maintenance.

4. How does AEC-Q100 Grade 3 compliance support automotive IoT sensors?

AEC-Q100 Grade 3 requires components to operate from -40??C to 85??C??matching the temperature range of automotive cabin and under-dash IoT sensors (e.g., climate control sensors). Compliance ensures the PMIC maintains stable output voltage and low noise in extreme temperatures, avoiding sensor data errors that cause 30% of automotive comfort system failures. It also eliminates the need for custom thermal testing, shortening sensor certification by 6 months.

5. Why is the ESA package better than through-hole packages for high-density PCBs?

Industrial PLC and IoT sensor PCBs use high-density layouts to fit multiple components. The 3.9mm x 3.9mm surface-mount ESA package is 50% smaller than through-hole dual-LDO packages, freeing up space for additional sensors or communication modules. Its surface-mount design also supports automated pick-and-place assembly, reducing production time by 30% vs. manual through-hole soldering??critical for high-volume manufacturing of 10k+ units.