مدونة الشركة حول Supply ADI Power Management:Circuit Monitors,Supervisors & Resets

Supply ADI Power Management:Circuit Monitors,Supervisors & Resets

ADI circuit monitors, voltage monitors and microprocessor resetters are core components for the reliability of power supply systems. They are primarily used for power-on reset, under-voltage / undervoltage detection, watchdog programme monitoring, manual reset and multi-rail power supply fault alarms. They are widely used in industrial automation, automotive electronics, telecommunications base stations, medical equipment, IoT terminals, AI edge control boards and humanoid robot control units, and are capable of preventing abnormal crashes, data loss and malfunctions in MCUs, FPGAs and processors caused by power fluctuations or programme runaway.

I. Details of ADI’s Monitoring and Reset Product Series

ADI’s product range in this category includes the ADM General-Purpose Monitoring and Reset Series, the MAX Classic Monitoring Circuit Series, the LTC Ultra-Low-Power Voltage Monitoring Series, and multi-channel power sequencing and system monitors. The functional spectrum is clearly defined, covering everything from extremely simple single-channel reset to multi-channel precision monitoring.

1. ADM Basic Monitoring and Reset Series

Representative models: ADM809, ADM810, ADM705/ADM706/ADM707/ADM708, ADM6316–ADM6322, ADM6821–ADM6825, ADM1810–ADM1818

The ADM809 and ADM810 are the most commonly used, extremely simple single-channel voltage monitoring reset ICs. They require no external components, feature a SOT-23 micro-package, and have preset fixed thresholds. They output a reset signal upon power-up or when undervoltage is detected, making them suitable for space-constrained, low-cost main control boards.

The ADM63xx series integrates a watchdog timer and a manual reset input, with selectable thresholds ranging from 2.5 V to 5 V. Multiple settings are available for reset delay and watchdog timeout periods, and a full range of push-pull and open-drain output versions is available. Compatible with mainstream 3.3 V and 5 V MCU systems, these are designed for humanoid robot control boards and industrial sensor nodes.

The ADM705–ADM708 series supports maintaining a reset output even at supply voltages as low as 1V, and features built-in watchdog and power failure detection, making them suitable for applications with stringent reliability requirements regarding power loss, such as industrial control PLCs and communications boards.

The ADM1810–ADM1818 series emphasises low power consumption and manual reset input, with selectable output levels, making them suitable for battery-powered portable devices and IoT wireless modules.

2. MAX Classic Microprocessor Monitoring Circuit Series

Representative models: MAX706, MAX791, MAX6443–MAX6452, MAX16056–MAX16059, MAX6747/MAX6750/MAX6751

The MAX706 is an industry-standard, multi-functional monitoring chip that integrates reset, an independent watchdog, a 1.25 V reference fault detector and a manual reset function across four channels. It can be used for low battery warning and multi-channel auxiliary power detection, and is widely adopted in industrial equipment and upgrades to legacy platforms.

The MAX16056–MAX16059 series features ultra-low quiescent current in the nanoampere range, with typical power consumption of just 125 nA, making it suitable for devices with lithium-ion batteries in long-term standby mode and remote data acquisition terminals; it supports watchdog, undervoltage reset and manual reset triggering.

Some models in the MAX644x series are AEC-Q100 automotive-grade certified, offering stable operation across a wide temperature range; they are designed for automotive domain controllers and in-vehicle sensor power monitoring. The MAX67xx series supports capacitively configurable watchdog timeout windows, allowing flexible adaptation to different software watchdog cycles.

3. LTC Ultra-Low-Power Precision Voltage Monitor Series

Representative models: LTC2965, LTC2966

These are ultra-low-power voltage monitors featuring high-precision threshold detection and ultra-low quiescent current. They can simultaneously monitor multiple independent voltage rails, support window comparison and fault flag outputs, and are suitable for high-density AI computing boards, Low Earth Orbit (LEO) satellite payloads, and power health monitoring in precision instruments. They are ideal for high-reliability applications with dual constraints on power consumption and detection accuracy, and are suitable for monitoring servo power rails in humanoid robots.

4. Multi-Channel Power System Monitors and Sequence Management Devices

Representative models: Multi-channel power monitoring devices such as the MAX20484, which support synchronous monitoring of 3 to 5 power supplies, clock monitoring and watchdog coordination. These devices not only perform under-voltage reset but also enable multi-rail power-up sequencing control and fault reporting. They are used in server power supplies, high-end industrial controllers and complex robotic main control chassis.

II. Procurement, Selection and Buyer’s Guide

1. Key Selection Criteria

1. Number of monitoring channels

Single power supply, simple MCU control: prioritise ADM809, ADM810, ADM682x;

Requires a watchdog to prevent programme runaway: select ADM63xx, MAX706, MAX67xx;

For synchronous monitoring of multiple power rails and battery early warning: MAX791, LTC2965/LTC2966, MAX20484;

2. Reset Threshold and Target Supply Voltage

Prioritise matching the system’s main rail voltage (1.8V/2.5V/3.3V/5V); ensure you distinguish between industrial-standard thresholds and automotive-grade thresholds; The higher the threshold accuracy, the more suitable the device is for use with precision analogue front-ends.

3. Reset output type

Push-pull output: High drive capability; connects directly to the MCU’s reset pin;

Open-drain output: Suitable for ‘AND’ logic on multi-chip reset lines; requires an external pull-up resistor; selected when multiple devices share a reset bus.

Also confirm whether the reset is active-high or active-low to avoid level mismatches.

4. Reset Delay and Watchdog Timeout

The reset delay determines the duration of the power-up stabilisation period, preventing false resets during the power-up ramp-up phase; the watchdog timeout must exceed the maximum software feeding interval, with a margin to prevent frequent false resets.

5. Power Consumption Grade

Battery-powered, passive sensor nodes: select nA-grade low-power models from the MAX16056 series;

Industrial control boards and robot controllers with continuous mains power supply, where power consumption constraints are less stringent: prioritise general-purpose ADM63xx and MAX706 devices.

6. Environmental Grade and Certification

General consumer and general industrial applications: commercial temperature range;

Automotive ADAS and in-vehicle control: AEC-Q100-certified models must be selected, such as the automotive-grade version of the MAX6444;

Aerospace and specialised high-reliability applications: Prioritise the LTC series of precision monitors, and verify specifications for radiation resistance and wide temperature ranges.

7. Package Selection

SOT-23, SOT-143: Compact surface-mount packages, suitable for high-volume SMT mass production; SOIC: Compatible with traditional through-hole components, facilitating manual debugging and repair.

2. Procurement Considerations

- Distinguish between discontinued models and recommended new replacements; ADI is gradually phasing out some early MAX models, so new projects should prioritise the ADM series to ensure long-term availability;

- Automotive-grade, industrial-grade and commercial-grade part numbers are clearly distinguished by their suffixes and must not be used interchangeably;

- Before placing bulk orders, it is recommended to request samples to verify reset timing and immunity to interference under power jitter, and to confirm compatibility with the host MCU’s reset circuit;

- Complementary solutions: For multi-channel monitoring scenarios, these can be combined with ADI isolators, reference voltage sources and hot-swap devices to build a complete power protection chain.

III. Mingjiada Electronics | ADI Circuit Monitors, Supervisors and Resetters: Supply Quality and Delivery Assurance

Shenzhen Mingjiada Electronics is a long-standing component service provider specialising in the full range of ADI analogue and power devices. We offer a stable supply of the complete ADI ADM, MAX and LTC series of power monitoring, reset and voltage monitoring devices, covering general commercial, industrial and automotive-grade models, suitable for projects such as humanoid robots, automated equipment, automotive ADAS, telecommunications and AI servers.

Supply Capabilities

1. Comprehensive model coverage with mainstream items always in stock: popular monitoring and reset ICs such as the ADM809, ADM810, ADM6316, MAX706, MAX16057 and LTC2965 are held in stock on a long-term basis. We also source hard-to-find and end-of-life models, supporting one-stop BOM fulfilment, and can simultaneously supply other ADI components for signal chains, isolation and power management;

2. Distinction between supply and buy-back services: Brand-new, original ADI watchdog reset ICs form the core of our supply portfolio; we also provide buy-back services for obsolete or surplus chips from the same series, helping customers utilise their project inventory.

Quality Control System

1. Targeted control of supply channels; all sources are traced and verified; we guarantee genuine, original products and reject refurbished, re-polished or loose new components;

2. Upon receipt, we conduct visual inspections, serial number verification and random electrical testing, whilst cross-referencing against the original manufacturer’s datasheets to verify thresholds and key reset timing parameters; for automotive-grade components, we additionally verify AEC-Q100 marking and batch traceability documentation, and can provide original manufacturer COCs and factory test reports to meet the audit requirements for industrial and automotive projects;

3. We adhere to ISO quality control processes, maintain batch retention records and support end-to-end traceability.

Delivery and Technical Service Advantages

1. Warehouse layout: A coordinated dual-warehouse system in Shenzhen and Hong Kong enables rapid dispatch of in-stock models, with priority given to small-batch samples and R&D prototyping; in-stock orders are delivered within short lead times, whilst forward orders have fixed delivery dates. We monitor the original manufacturer’s production schedules in real time to mitigate the risk of delivery date fluctuations;

2. Technical FAE Support: We assist customers with BOM component selection and substitution, as well as the evaluation of reset circuit reference designs. We provide selection recommendations for servo power supply monitoring in humanoid robots and multi-rail industrial control power supply monitoring scenarios, helping to avoid pitfalls in threshold, delay and output level selection;

3. Order Flexibility: We cater to R&D samples, small-to-medium batch trial production and large-volume long-term orders, flexibly supporting customer needs at different stages whilst providing stable, long-term order fulfilment services.

IV. Summary of Typical Application Scenarios

- Industrial PLCs, variable frequency drives and remote I/O modules: ADM63xx, MAX706 (watchdog + power failure monitoring)

- In-vehicle control and sensor power supplies: AEC-Q100-certified MAX644x series

- Battery-powered IoT and wireless data acquisition terminals: MAX16056 nanoampere-level low-power monitor

- Humanoid robot main control and servo drive boards: LTC2965, ADM63xx multi-rail power supply monitoring + watchdog reset

- AI computing boards, server auxiliary power supply monitoring: MAX20484 multi-rail power system monitor

- Portable medical devices: ADM18xx low-power manual reset monitoring circuit