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Analog Devices Inc./Maxim Integrated MAX14571EUD+
- Part No.:
- MAX14571EUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Surge Suppression Ics
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX14571EUD+.pdf
- Description:
- IC OVP/OVC ADJ HI ACCURACY TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,512
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Product details
Overview
The MAX14571EUD+ from Maxim Integrated is an adjustable overvoltage and overcurrent protection IC designed for high-reliability industrial power rail protection. It features 100mΩ (typ) internal FETs, factory-preset 33V (typ) OVLO and 19.2V (typ) UVLO thresholds, programmable current limiting up to 4.2A, and autoretry fault recovery - deployed in battery-powered equipment, marine systems, and industrial control inputs.
For engineers reviewing the MAX14571EUD+ datasheet, MAX14571EUD+ pinout, MAX14571EUD+ application, or MAX14571EUD+ equivalent, this page delivers verified functional identity, confirmed thermal shutdown behavior at +150°C (typ), exact TSSOP-14 EP package mapping, validated 20.7ms (typ) blanking time, and two manufacturer-confirmed alternative parts with documented functional divergence.
Technical Context
The MAX14571EUD+ implements dual independent enable logic (EN active-high, HVEN active-low with 36V tolerance), automatic internal/external OVLO/UVLO threshold selection based on comparator reference voltage (1.210V typ), and a dedicated SETI pin for resistor-programmed current limit with ±15% accuracy. Its autoretry mode uses fixed 30× ratio between retry and blanking time (600ms / 20.7ms).
It integrates reverse-current blocking (40–160mV threshold), thermal shutdown with 30°C hysteresis, and input debounce (16.7ms typ) to prevent false turn-on during supply ramp-up. The device operates across -40°C to +85°C with junction-to-ambient thermal resistance of 39°C/W on a four-layer board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVLO Threshold | 33V (typ); factory preset; disables output if VIN exceeds threshold to protect downstream circuitry |
| UVLO Threshold | 19.2V (typ); factory preset; disables output if VIN falls below threshold to prevent brownout operation |
| Current Limit Range | 0.7A to 4.2A; set via resistor to SETI; ±15% accuracy ensures predictable short-circuit energy limiting |
| Blanking Time | 20.7ms (typ); prevents false fault assertion during transient inrush or load switching |
| Autoretry Interval | 600ms (typ); enables automatic recovery after fault clearance without host intervention |
| RON | 100mΩ (typ); low conduction loss supports high-efficiency 4.2A continuous operation at ambient temperature |
| Thermal Shutdown | +150°C (typ) junction temperature; latches off only during sustained overload - resumes after 30°C cooldown |
Pinout & Package
Package: 14-pin TSSOP with exposed pad (5mm × 6.5mm, RoHS-compliant). Exposed pad must be soldered to GND plane for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 - IN | High-voltage input terminal | Accepts -40V to +40V; bypassed with 1µF ceramic capacitor for ESD and transient suppression |
| 4 - UVLO | Undervoltage lockout configuration pin | Connect to GND for 19.2V (typ) internal threshold; external resistor divider enables 4.5V–24V adjustment |
| 5 - OVLO | Overvoltage lockout configuration pin | Connect to GND for 33V (typ) internal threshold; external resistor divider enables 6V–36V adjustment |
| 6 - SETI | Current-limit programming input | Resistor to GND sets ILIM (0.7A–4.2A); unconnected = 0A limit; connected to GND = immediate FLAG assert |
| 7 - GND | Signal and power ground reference | Primary return path; EP (exposed pad) is internally tied to GND and must be externally connected |
| 8 - HVEN | High-voltage enable input | Active-low; withstands up to +36V; toggling resets latch-off faults; compatible with 24V control rails |
| 9 - RIEN | Reverse-current enable input | Logic-high enables reverse-current blocking (40–160mV threshold); GND disables blocking for inductive loads |
| 10 - EN | Standard enable input | Active-high; toggling resets fault state; used with HVEN for dual-control redundancy |
| 11 - FLAG | Open-drain fault indicator | Asserts low on OVLO/UVLO trip, thermal shutdown, reverse-current detection, or SETI=GND condition |
| 12, 13, 14 - OUT | Protected output terminal | Drives load through internal FETs; bypassed with 1µF ceramic capacitor; rated -0.3V to +40V |
Key Features
| Feature | Design Value |
|---|---|
| Autoretry fault recovery | Enables self-healing after overcurrent events without system reset - reduces downtime in remote industrial nodes |
| ±3% accurate internal OVLO/UVLO | Eliminates need for precision external resistors in baseline configurations while maintaining tight trip tolerance |
| Reverse-current blocking | Prevents backfeed from capacitive or inductive loads into upstream supplies - critical for hot-swap and battery backup systems |
| Input debounce (16.7ms typ) | Rejects spurious turn-on during slow-ramping 24V supplies or noisy enable signals in factory automation environments |
| HVEN with 36V tolerance | Allows direct connection to industrial 24V control buses without level-shifting - simplifies PLC I/O interface design |
Applications
| Industrial Power Input Protection | Battery-Powered Equipment |
|---|---|
|
Use Scenario: 24V DC input to PLC I/O module exposed to field wiring faults and surge transients. IC Role / Device Role / Timing Role: Primary overvoltage/overcurrent switch controller with autoretry; monitors IN voltage and load current in real time. Use Value: Prevents damage from +40V surges or short circuits while automatically recovering - avoids manual reset in inaccessible installations. |
Use Scenario: Portable test instrument powered by Li-ion pack with variable voltage (8–32V) and risk of accidental short-circuit. IC Role / Device Role / Timing Role: Input protector with programmable current limit and thermal shutdown; acts as smart fuse before main regulator. Use Value: Limits peak fault current to 4.2A and enforces 600ms autoretry window - preserves battery charge and extends usable life under intermittent faults. |
| Marine Navigation Systems | Automated Test Equipment (ATE) |
|
Use Scenario: 12V/24V marine battery input subject to load dump (up to +40V) and reverse polarity during jump-start attempts. IC Role / Device Role / Timing Role: Bidirectional fault protector with reverse-current blocking enabled via RIEN; handles both positive and negative transients. Use Value: Blocks reverse current flow during polarity reversal and clamps overvoltage at 33V - protects sensitive GPS and comms circuitry. |
Use Scenario: ATE power sequencer requiring precise, repeatable current limiting during DUT power-up and fault injection tests. IC Role / Device Role / Timing Role: Programmable current limiter with ±15% accuracy and 20.7ms blanking; FLAG provides deterministic fault signaling to test controller. Use Value: Enables calibrated short-circuit stress testing with known current ceiling and timing - improves test repeatability and failure analysis fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage and overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14572EUD+ | Latch-off (non-recovering) fault response instead of autoretry; same OVLO/UVLO thresholds and RON | Used where permanent shutdown is required after first overcurrent event - e.g., safety-critical subsystems | Select when fault persistence must halt operation until explicit reset; not suitable for self-healing systems |
| TPS26631PWPR | Fixed 36V OVLO, no UVLO, 2.7A max current limit, integrated 1.5A LDO for auxiliary supply | Targeted at USB-C PD and PoE-powered devices needing auxiliary bias - lacks reverse-current blocking and wide UVLO range | Choose when auxiliary 3.3V/5V rail generation is needed alongside protection; avoid when 4.2A or 4.5–24V UVLO is mandatory |
Compared with MAX14571EUD+, MAX14572EUD+ eliminates autoretry for fail-safe shutdown, while TPS26631PWPR trades programmability and reverse-current blocking for integrated auxiliary power - making MAX14571EUD+ uniquely suited for industrial systems requiring adaptive, self-recovering protection across wide input ranges.
Availability
MAX14571EUD+ is available at Aetrix Electronics and suitable for industrial equipment, marine navigation systems, and battery-powered portable instruments requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX14571EUD+ 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 demanding industrial, automotive, and communications applications - emphasizing reliability, precision, and integration.
The MAX14571EUD+ belongs to Maxim's high-accuracy protection IC family, engineered specifically for robust front-end power conditioning in harsh environments where voltage transients, reverse polarity, and thermal stress are common.
FAQ
What is the default overvoltage lockout (OVLO) threshold for the MAX14571EUD+?
The MAX14571EUD+ has a factory-preset internal OVLO threshold of 33V (typical), which activates when the OVLO pin is connected to GND. This value is guaranteed within ±1V (32V to 34V) over temperature and supply variations. External resistor dividers can override this setting to adjust OVLO anywhere from 6V to 36V, but the default remains 33V unless modified.
How does the MAX14571EUD+ respond to an overcurrent fault?
Upon detecting load current exceeding the SETI-programmed limit, the MAX14571EUD+ waits 20.7ms (typical blanking time) before asserting FLAG and turning off the internal FETs. It then remains off for 600ms (typical retry time) before attempting automatic re-enabling - repeating this autoretry cycle until the fault clears. Thermal shutdown at +150°C (typ) also triggers this sequence.
Can the MAX14571EUD+ protect against reverse polarity connections?
Yes - the MAX14571EUD+ supports reverse-polarity protection via its reverse-current blocking feature. When RIEN is pulled high, the device blocks reverse current flow from OUT to IN once the VRIB threshold (40–160mV) is exceeded. This prevents damage from accidental battery reversal or incorrect cabling in field-deployed equipment.
What is the purpose of the HVEN pin on the MAX14571EUD+?
The HVEN pin on the MAX14571EUD+ is an active-low, high-voltage-tolerant enable input rated to +36V. It allows direct interfacing with 24V industrial control signals without level shifting. Driving HVEN low enables normal operation; driving it high disables the FETs. Toggling HVEN also resets latch-type faults - providing hardware-level fault recovery independent of the EN signal.
Does the MAX14571EUD+ require external components for basic operation?
Yes - for reliable operation, the MAX14571EUD+ requires a 1µF ceramic capacitor from IN to GND (for ESD and transient suppression) and another 1µF ceramic capacitor from OUT to GND (for stability). If using factory-preset OVLO/UVLO, OVLO and UVLO pins must be tied to GND. The SETI pin requires a resistor to GND to set current limit; leaving it floating disables current limiting (0A limit).
MAX14571EUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- -
- Technology:
- Internal Switch
- Number of Circuits:
- 1
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP-EP
MAX14571EUD+ FAQ
1.How can I place an order for MAX14571EUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14571EUD+ 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 MAX14571EUD+ reliable?
The price and inventory of MAX14571EUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14571EUD+ is usually 5 days.
3.What payment methods are accepted for MAX14571EUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14571EUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14571EUD+?
MAX14571EUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14571EUD+ 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 MAX14571EUD+?
For technical support, including MAX14571EUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14571EUD+ requirements.
6.How does Aetrix verify that MAX14571EUD+ is sourced from the original manufacturer or authorized distributors?
All MAX14571EUD+ 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 MAX14571EUD+ meets industry standards.
7.What is the process for return or replacement of MAX14571EUD+?
All MAX14571EUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14571EUD+, 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 MAX14571EUD+ part is unused and in its original packaging.
Return procedure for MAX14571EUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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