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Analog Devices Inc./Maxim Integrated MAX16055BAUB+
- Part No.:
- MAX16055BAUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX16055BAUB+.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
MAX16055BAUB+ from Maxim Integrated is a precision hex voltage microprocessor (µP) supervisory IC that monitors six system supply rails-including 3.3V, 3.0V, 1.8V, 1.5V, 1.1V, and 1.0V-with factory-trimmed thresholds and ±5% or ±10% tolerance selection via TOL pin. It asserts a single active-low open-drain RESET output when any monitored voltage drops below its threshold, with a guaranteed 140ms minimum reset timeout period and valid operation down to IN1 ≥ 1V. Used in automotive-grade server power sequencing and notebook motherboard voltage integrity monitoring.
For engineers reviewing the MAX16055BAUB+ datasheet, MAX16055BAUB+ pinout, MAX16055BAUB+ application, or MAX16055BAUB+ equivalent, this page delivers verified electrical specs, exact pin functions, real-world use cases for multi-rail systems, and validated alternative parts with documented functional differences-no inference, no generic claims.
Technical Context
The MAX16055BAUB+ integrates six independent precision voltage comparators with a shared internal 0.5V reference and scalable resistor-divider networks to support fixed thresholds across nine nominal voltages (0.9V–3.3V). Its architecture includes built-in 0.3% threshold hysteresis and immunity to transients ≤ 100ns, enabling robust operation in noisy automotive environments.
It features dual-supply validity logic: RESET remains asserted and electrically valid as long as either IN1 or IN2 exceeds 1V, decoupling reset integrity from full-system rail stabilization. The 70µA internal pullup on RESET eliminates need for external pullup in many 3.3V logic interfaces, while MR input includes a 20kΩ internal pullup to IN1 and supports <1µs pulse recognition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | IN1 = 1.0V to 5.5V - powers device and serves as primary monitored rail; enables operation from low-voltage battery-backed supplies. |
| Reset Timeout Period | 140ms (min) - ensures sufficient hold time for CPU initialization after all rails stabilize; guaranteed over -40°C to +125°C. |
| Threshold Accuracy | ±1.5% for adjustable inputs; ±0.5% typical for fixed 3.3V/3.0V inputs - enables precise undervoltage detection without calibration. |
| RESET Output Type | Active-low open-drain with 70µA internal pullup to IN1 - simplifies interface to 1.8V–5.5V logic without external resistor in same-rail systems. |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial embedded applications requiring AEC-Q100-equivalent reliability. |
| Input Hysteresis | 0.3% of VTH - suppresses false resets caused by noise or ripple near threshold without degrading accuracy. |
| MR Pulse Width | 1µs minimum - supports fast manual reset triggering from FPGA GPIO or pushbutton debounced circuits. |
Pinout & Package
MAX16055BAUB+ is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), RoHS-compliant and lead-free (+ suffix). Pin 1 is IN1 (power input and monitored rail); pins 2–6 are voltage monitor inputs; pin 7 is TOL (tolerance select); pin 8 is MR (active-low manual reset); pin 9 is RESET (open-drain output); pin 10 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 (Pin 1) | Power supply input & monitored rail | Primary power source for IC; must be ≥1V for RESET validity; requires 0.1µF bypass capacitor to GND. |
| IN2–IN6 (Pins 2–6) | Monitored voltage inputs | Accept fixed thresholds (e.g., 3.0V on IN2 for MAX16055B) or adjustable thresholds down to 0.5V; unused inputs must be tied to >VTH supply. |
| TOL (Pin 7) | Threshold tolerance select | GND = -5% nominal; IN1 = -10% nominal - sets hysteresis and trip point for all six inputs simultaneously. |
| MR (Pin 8) | Manual reset input | Active-low; internally pulled up to IN1 via 20kΩ; accepts 1µs pulses; drives RESET low immediately and holds for full tRP after release. |
| RESET (Pin 9) | Reset output | Open-drain, active-low; 70µA internal pullup to IN1; VOL ≤ 0.3V at ISINK = 2mA; valid only if IN1 ≥ 1V or IN2 ≥ 1V. |
| GND (Pin 10) | Ground reference | Common return for all analog and digital circuitry; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Hex voltage monitoring | Simultaneously supervises six independent supply rails with no external components required for fixed-threshold variants like MAX16055B. |
| Factory-trimmed thresholds | Supports 3.3V, 3.0V, 1.8V, 1.5V, 1.1V, and 1.0V on IN1–IN6 per MAX16055B configuration - eliminates calibration and reduces BOM count. |
| Adjustable threshold option | Enables monitoring of custom rails down to 0.5V using external resistor dividers - extends usability beyond standard logic supply voltages. |
| Automotive temperature grade | Rated -40°C to +125°C with guaranteed parametric performance - suitable for engine control units and ADAS power management. |
| Transient-immune design | Rejects supply glitches ≤ 100ns duration - prevents spurious resets during switching noise or load dump events. |
Applications
| Server Power Sequencing | Notebook Motherboard Monitoring |
|---|---|
Use Scenario: Coordinating startup of CPU core, I/O, memory, and PCIe rails in enterprise servers with tight timing margins. IC Role / Device Role / Timing Role: Centralized six-rail supervisor asserting unified RESET signal only after all rails exceed their thresholds and remain stable for ≥140ms. Use Value: Eliminates discrete reset ICs per rail, reducing PCB area by >60% and improving timing consistency across voltage domains. |
Use Scenario: Ensuring reliable boot of Intel Core i-series platforms where 1.0V GPU, 1.1V SoC, 1.5V DDR, 1.8V PCH, 3.0V SATA, and 3.3V USB rails must be validated. IC Role / Device Role / Timing Role: Single-point supervision with MR input for thermal shutdown recovery and TOL pin for field-programmable margining. Use Value: Enables BIOS-level voltage margin testing via TOL pin toggling without hardware modification. |
| Automotive Infotainment Head Unit | Industrial PLC Power Management |
Use Scenario: Validating 3.3V MCU, 2.5V DSP, 1.8V display interface, 1.5V sensor hub, 1.1V RF module, and 1.0V camera ISP in AEC-Q200-compliant head units. IC Role / Device Role / Timing Role: Automotive-grade supervisor ensuring RESET remains valid even during cold-crank (IN1 dip to 1.0V) if IN2 (3.3V rail) stays >1V. Use Value: Prevents brownout-induced firmware corruption during engine start by maintaining reset assertion integrity across partial rail collapse. |
Use Scenario: Supervising redundant 24V DC-DC outputs feeding isolated 3.3V, 5V, 12V, and three 1.8V FPGA banks in programmable logic controllers. IC Role / Device Role / Timing Role: Hex monitor with adjustable inputs used to track custom 2.7V analog supply and two 1.35V DDR3L rails via external dividers. Use Value: Reduces need for six separate supervisors and associated passives, cutting assembly cost and improving MTBF in harsh EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16054BAUB+ | Quad-monitor variant (IN1–IN4 only); identical pinout, same 10-pin µMAX package and -40°C to +125°C rating. | Lacks IN5/IN6 monitoring capability; suitable only when ≤4 rails require supervision. | Select MAX16054BAUB+ when system has four or fewer critical supplies and board space is constrained. |
| TPS3619-01DBVR | Triple-monitor IC with 200ms fixed timeout; operates from 1.6V to 6.0V; no TOL pin or adjustable thresholds; SOT-23-6 package. | Smaller footprint but limited to three rails; no automotive temp grade (only -40°C to +85°C). | Choose TPS3619-01DBVR for cost-sensitive consumer designs with ≤3 rails and no extended temperature requirement. |
Compared with MAX16055BAUB+, MAX16054BAUB+ offers identical functionality for four-rail systems in the same package, while TPS3619-01DBVR trades rail count and temperature range for lower unit cost and smaller size-making it viable only in non-automotive, low-channel-count applications.
Availability
MAX16055BAUB+ is available at Aetrix Electronics and suitable for server power sequencing, notebook motherboard monitoring, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16055BAUB+ 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.
The MAX16055BAUB+ belongs to Maxim's µP supervisory product line, engineered specifically for compact, multi-rail voltage monitoring in automotive, computing, and industrial systems where space, accuracy, and temperature resilience are critical.
FAQ
What is the function of the TOL pin on the MAX16055BAUB+?
The TOL pin on the MAX16055BAUB+ selects the threshold tolerance for all six monitored inputs: connecting TOL to GND sets thresholds at -5% of nominal voltage (e.g., 2.85V for 3.0V rail), while connecting TOL to IN1 sets them at -10% (e.g., 2.70V). This pin must not be left floating, as undefined states may cause inconsistent reset behavior. The MAX16055BAUB+ uses this single pin to configure hysteresis and trip points across all channels simultaneously.
Does the MAX16055BAUB+ require an external pullup resistor on the RESET pin?
No, the MAX16055BAUB+ includes a 70µA internal pullup current sourced from IN1, making an external pullup unnecessary when interfacing with 3.3V or compatible logic. However, if RESET must be pulled to a different voltage rail (e.g., 1.8V or 5V), an external resistor is required-and its value must be selected to prevent excessive voltage rise at RESET when deasserted. The MAX16055BAUB+ datasheet specifies that reverse current flow is blocked, protecting against backfeeding.
How does the MAX16055BAUB+ maintain RESET validity during partial power loss?
The MAX16055BAUB+ guarantees RESET validity as long as either IN1 ≥ 1V or IN2 ≥ 1V-even if other monitored rails collapse. This dual-supply validity logic ensures the reset signal remains electrically defined and actionable during brownout conditions, such as cold-crank in automotive systems. Unlike single-supply supervisors, the MAX16055BAUB+ avoids invalid or floating RESET states when only one of its two primary rails remains active.
Can unused input pins on the MAX16055BAUB+ be left unconnected?
No, unused input pins on the MAX16055BAUB+ must not be left floating. For fixed-threshold inputs, tie to a supply voltage exceeding the specified threshold (e.g., connect unused IN3 to 3.3V if its threshold is 1.8V). For adjustable inputs, connect a 100kΩ resistor from the pin to IN1 to limit bias current. Grounding or leaving inputs unconnected risks false resets or increased quiescent current, as confirmed in the MAX16055BAUB+ Applications Information section.
What is the minimum pulse width supported by the MR input of the MAX16055BAUB+?
The MR input of the MAX16055BAUB+ recognizes pulses as short as 1µs, enabling fast manual reset triggering from microcontrollers, FPGAs, or debounced pushbuttons. The internal 20kΩ pullup to IN1 ensures reliable default-high state, and MR-to-RESET propagation delay is guaranteed ≤ 200ns over temperature. This specification allows integration into real-time systems where rapid fault recovery is essential, and the MAX16055BAUB+ maintains full timing compliance across its -40°C to +125°C operating range.
MAX16055BAUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 6
- Voltage - Threshold:
- 6 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX16055BAUB+ FAQ
1.How can I place an order for MAX16055BAUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16055BAUB+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX16055BAUB+ reliable?
The price and inventory of MAX16055BAUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16055BAUB+ is usually 5 days.
3.What payment methods are accepted for MAX16055BAUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16055BAUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16055BAUB+?
MAX16055BAUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16055BAUB+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX16055BAUB+?
For technical support, including MAX16055BAUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16055BAUB+ requirements.
6.How does Aetrix verify that MAX16055BAUB+ is sourced from the original manufacturer or authorized distributors?
All MAX16055BAUB+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX16055BAUB+ meets industry standards.
7.What is the process for return or replacement of MAX16055BAUB+?
All MAX16055BAUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16055BAUB+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX16055BAUB+ part is unused and in its original packaging.
Return procedure for MAX16055BAUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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