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Analog Devices Inc./Maxim Integrated MAX16028TP+T
- Part No.:
- MAX16028TP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX16028TP+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,714
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Product details
Overview
MAX16028TP+T from Maxim Integrated is a triple-voltage, capacitor-adjustable supervisory and sequencing IC with push-pull outputs, monitoring three independent supply rails (e.g., 3.3V, 2.5V, 1.8V), offering ±1.5% adjustable threshold accuracy down to 0.5V and fixed thresholds with 2.7% accuracy over temperature, used in multivoltage server power-up sequencing.
For engineers reviewing the MAX16028TP+T datasheet, MAX16028TP+T pinout, MAX16028TP+T application, or MAX16028TP+T equivalent, this page delivers verified technical context, real-world timing behavior, package-validated pin functions, and selection-critical alternatives for industrial-grade power management design.
Technical Context
The MAX16028TP+T implements three independent comparator-based voltage monitors with logic-selectable thresholds (9 options via TH1/TH0), each featuring an active-high enable input (EN1–EN3) and capacitor-adjustable delay (CDLY1–CDLY3) using internal 250nA current sources charging external capacitors to 1V for precise timing control.
It integrates a shared active-low reset output (RESET) that deasserts only after all three monitored voltages exceed their thresholds, with reset timeout configurable via CRESET capacitor (or fixed 140ms minimum when tied to VCC), and supports tolerance selection (5%/10%) via TOL pin - all operating across -40°C to +125°C with 2.2V–28V VCC range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Monitored Voltages | Three independent inputs (IN1–IN3) with selectable fixed or adjustable thresholds |
| Output Type | Push-pull OUT1–OUT3 and push-pull RESET - no external pullup required |
| Threshold Accuracy | ±1.5% for adjustable monitors (down to 0.5V); ±2.7% for fixed thresholds over full temperature range |
| Delay Timing | Capacitor-adjustable IN-to-OUT delay (CDLY1–CDLY3) with 35µs base propagation + linear scaling |
| Reset Timeout | Fixed 140ms min (CRESET = VCC) or capacitor-adjustable (0.03ms to >1s) via CRESET pin |
| Operating Range | VCC = 2.2V to 28V; fully specified from -40°C to +125°C |
| Supply Current | 52µA to 80µA typical at VCC = 28V - enables low-power always-on supervision |
Pinout & Package
MAX16028TP+T is housed in a 20-pin, 4mm × 4mm × 0.8mm thin QFN (TQFN) package with exposed pad (EP) internally connected to GND. Pin pitch is 0.5mm; RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 9) | Supply Input | 2.2V–28V main power rail; UVLO activates below 1.9V; bypass with 0.1µF ceramic capacitor |
| IN1–IN3 (Pins 2, 3, 4) | Monitored Inputs | High-impedance (≥500kΩ) analog inputs for voltage supervision; support fixed or resistor-divider-adjusted thresholds |
| OUT1–OUT3 (Pins 15, 16, 14) | Supervisory Outputs | Push-pull, actively driven high/low - directly interface with enable pins of DC-DC regulators without pullups |
| EN1–EN3 (Pins 11, 10, 12) | Enable Inputs | Active-high digital controls; disable respective OUTx independently - critical for staged sequencing |
| CDLY1–CDLY3 (Pins 20, 19, 18) | Delay Capacitor Inputs | Internal 250nA current source charges external capacitor to 1V; sets INx-to-OUTx assertion delay |
| RESET (Pin 8) | System Reset Output | Active-low push-pull output asserting when any INx falls below threshold or ENx goes low |
| CRESET (Pin 13) | Reset Timeout Control | Connect capacitor to GND to set reset timeout; tie to VCC for fixed 140ms minimum |
| TOL (Pin 7) | Tolerance Select | GND = 5% threshold tolerance; VCC = 10% tolerance - configures hysteresis for noise immunity |
| TH0/TH1 (Pins 6, 5) | Threshold Logic Select | Two-pin binary encoding selects one of nine threshold combinations for IN1–IN3 (e.g., 3.3V/2.5V/1.8V) |
| MR (Pin 17) | Manual Reset Input | Active-low; internal 500nA pullup allows direct switch-to-GND connection - no external components needed |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent supervision | Three fully isolated monitor channels (IN1–IN3/OUT1–OUT3) enabling concurrent or daisy-chained sequencing |
| Logic-selectable thresholds | 9 distinct voltage combinations via TH0/TH1 pins - eliminates external resistors for common rail pairs |
| Capacitor-adjustable timing | CDLY1–CDLY3 and CRESET accept standard ceramic capacitors (100pF–100nF) for µs-to-second delay tuning |
| Push-pull outputs | Eliminates need for external pullup resistors on OUT1–OUT3 and RESET - reduces BOM count and layout area |
| Wide VCC operation | 2.2V–28V supply range supports supervision of both low-voltage logic rails and higher intermediate bus voltages |
| Automotive-grade temp range | Full -40°C to +125°C operation with guaranteed performance - suitable for industrial and telecom equipment |
Applications
| Server Power-Up Sequencing | Industrial PLC Power Management |
|---|---|
Use Scenario: Controlled ramp-up of 3.3V, 2.5V, and 1.8V rails in rack-mounted servers to prevent latch-up and ensure proper FPGA/CPU initialization. IC Role / Device Role / Timing Role: MAX16028TP+T acts as a sequencer by asserting OUT1→OUT2→OUT3 with programmable delays, while RESET remains asserted until all rails are stable. Use Value: Prevents system lockup during cold start; eliminates need for discrete RC timers or microcontroller-based sequencing logic. |
Use Scenario: Monitoring redundant 24V, 5V, and 3.3V supplies in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: MAX16028TP+T provides independent enable/disable control per rail via EN1–EN3 and generates fault-triggered RESET to halt I/O operations. Use Value: Enables fast (<100µs) response to undervoltage events on any rail, meeting SIL-2 functional safety requirements for industrial control. |
| Telecom Line Card Supervision | Storage System Power Integrity |
Use Scenario: Ensuring valid power sequencing and continuous monitoring of +12V, +3.3V, and +1.2V supplies powering SERDES, PHY, and memory on telecom line cards. IC Role / Device Role / Timing Role: MAX16028TP+T uses TOL and TH0/TH1 to configure tight 5% thresholds on high-precision rails and asserts RESET if any rail deviates beyond spec. Use Value: Maintains link integrity during brownouts; avoids packet loss by triggering controlled shutdown before data corruption occurs. |
Use Scenario: Managing power sequencing and health monitoring for NVMe SSD controller, DRAM, and flash memory rails in enterprise storage enclosures. IC Role / Device Role / Timing Role: MAX16028TP+T coordinates delayed activation of 1.8V DRAM, 3.3V controller, and 12V flash VPP rails using CDLY1–CDLY3 capacitors. Use Value: Guarantees write-cache flush completion before power removal; prevents NAND corruption during unexpected power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory and sequencing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16027TP+ | Same pinout and functionality but open-drain outputs - requires external pullups for interfacing with 5V/12V enable inputs | Suitable where level-shifting or higher-voltage signaling (>3.3V) is needed at outputs | Select MAX16027TP+ only if open-drain flexibility is required; otherwise MAX16028TP+T reduces component count |
| TPS3808G33DBVR | Single-channel 3.3V supervisor with fixed threshold and no sequencing capability - lacks multi-rail coordination or adjustable delays | Limited to basic reset generation for one rail; cannot replace triple-monitoring or sequencing function | Use only as partial replacement for standalone 3.3V monitoring; not viable for full MAX16028TP+T functional substitution |
Compared with MAX16027TP+, MAX16028TP+T eliminates external pullup resistors and simplifies layout; compared with TPS3808G33DBVR, it delivers full triple-rail coordination, capacitor-timed delays, and logic-selectable thresholds - making it irreplaceable for multivoltage sequencing designs.
Availability
MAX16028TP+T is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC supervision, and telecom line card monitoring requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX16028TP+T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX16025–MAX16030 family was designed specifically for robust, capacitor-programmable power-supply sequencing and supervision in multirail systems - emphasizing accuracy, wide VCC range, and extended temperature reliability.
FAQ
What is the exact pin count and package type of MAX16028TP+T?
MAX16028TP+T uses a 20-pin thin QFN (TQFN) package measuring 4mm × 4mm × 0.8mm with 0.5mm pitch and an exposed thermal pad connected to GND. This matches the ordering code "TP+" and is confirmed in the Maxim datasheet's Ordering Information table and Pin Configurations diagram.
Does MAX16028TP+T support adjustable reset timeout, and how is it configured?
Yes, MAX16028TP+T supports adjustable reset timeout via the CRESET pin: connect a capacitor from CRESET to GND to set timeout from ~0.03ms up to several seconds, calculated as tRP = (0.5V / 500nA) × CCRESET + 35µs. Tying CRESET to VCC yields a fixed 140ms minimum timeout - a key feature confirmed in Electrical Characteristics and Applications Information sections.
How many voltage rails can MAX16028TP+T monitor, and what are the threshold options?
MAX16028TP+T monitors exactly three voltage rails (IN1–IN3) with nine logic-selectable threshold combinations via TH0/TH1 pins - including fixed options like 3.3V/2.5V/1.8V and adjustable modes down to 0.5V. This is explicitly defined in Table 2 (Input-Voltage Threshold Selector) and the Selector Guide.
What output configuration does MAX16028TP+T use, and why does it matter?
MAX16028TP+T features push-pull outputs for OUT1–OUT3 and RESET - meaning it actively drives both high and low states without external pullup resistors. This reduces BOM cost and PCB area versus open-drain alternatives like MAX16027TP+, and is clearly stated in the Selector Guide and Applications Information section.
Can MAX16028TP+T operate across automotive temperature ranges?
Yes, MAX16028TP+T is fully specified from -40°C to +125°C, with all electrical characteristics guaranteed across this range - including threshold accuracy, propagation delay, and supply current. This is documented in Absolute Maximum Ratings, Electrical Characteristics notes, and the Ordering Information table.
MAX16028TP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 9 Selectable Threshold Combinations
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms/Adjustable Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (4x4)
MAX16028TP+T FAQ
1.How can I place an order for MAX16028TP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16028TP+T 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 MAX16028TP+T reliable?
The price and inventory of MAX16028TP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16028TP+T is usually 5 days.
3.What payment methods are accepted for MAX16028TP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16028TP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16028TP+T?
MAX16028TP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16028TP+T 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 MAX16028TP+T?
For technical support, including MAX16028TP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16028TP+T requirements.
6.How does Aetrix verify that MAX16028TP+T is sourced from the original manufacturer or authorized distributors?
All MAX16028TP+T 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 MAX16028TP+T meets industry standards.
7.What is the process for return or replacement of MAX16028TP+T?
All MAX16028TP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16028TP+T, 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 MAX16028TP+T part is unused and in its original packaging.
Return procedure for MAX16028TP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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