My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX14573EUD+
- Part No.:
- MAX14573EUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Surge Suppression Ics
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX14573EUD+.pdf
- Description:
- IC OVP/OCP ADJ PROTECT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:642
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX14573EUD+ from Maxim Integrated is a continuous-current-limit overvoltage and overcurrent protection IC designed for high-reliability industrial power rails. It features 100mΩ (typ) internal FETs, factory-preset 33V OVLO and 19.2V UVLO thresholds, ±15% current-limit accuracy up to 4.2A, and thermal shutdown at +150°C - deployed in battery-powered marine equipment and 24V industrial control systems.
For engineers reviewing the MAX14573EUD+ datasheet, MAX14573EUD+ pinout, MAX14573EUD+ application, or MAX14573EUD+ equivalent, this page delivers verified functional behavior, validated pin roles, confirmed thermal and fault-timing parameters, and real-world design implications for continuous-fault handling in harsh-voltage environments.
Technical Context
The MAX14573EUD+ implements a continuous current-limit architecture: when load current exceeds the SETI-programmed threshold, it clamps output current without latching off or entering autoretry cycles. Its dual enable inputs (EN and HVEN) operate independently - HVEN tolerates up to +36V and supports high-voltage system-level control, while EN provides standard logic-level activation.
Protection logic integrates four concurrent fault monitors: overvoltage (OVLO), undervoltage (UVLO), reverse current (via RIEN-controlled blocking), and thermal shutdown. All thresholds are internally referenced to a 1.21V (typ) bandgap, enabling stable operation across -40°C to +85°C with ±3% factory-trimmed OVLO/UVLO accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Lockout (OVLO) | 33V (typ) factory preset; adjustable 6V–36V via external resistor divider - sets hard cutoff voltage before FET turn-off. |
| Undervoltage Lockout (UVLO) | 19.2V (typ) factory preset; adjustable 4.5V–24V - prevents operation below safe rail voltage for downstream circuitry. |
| Current Limit Range | 0.7A–4.2A programmable via SETI-to-GND resistor; ±15% accuracy ensures predictable short-circuit current capping. |
| FET On-Resistance | 100mΩ (typ) at VIN ≥ 8V, ILOAD = 100mA - minimizes conduction loss and self-heating during sustained loads. |
| Thermal Shutdown Threshold | +150°C (typ) junction temperature - disables output until die cools by ~30°C, then resumes continuous limiting. |
| Reverse Current Blocking | Activates at VOUT − VIN ≥ 40mV; blocks >400nA leakage above 160mV - protects against backfeed in inductive-load applications. |
| FLAG Output | Open-drain fault indicator asserting low on OVLO/UVLO trip, thermal shutdown, reverse-current detection, or SETI = GND. |
Pinout & Package
Package: 14-pin TSSOP with exposed pad (5mm × 6.5mm); RoHS-compliant, thermally enhanced for industrial ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 - IN | High-voltage input terminal | Accepts -40V to +40V fault transients; bypassed with 1µF ceramic capacitor for ESD and hot-plug stability. |
| 4 - UVLO | Undervoltage threshold programming node | Connect to GND for 19.2V (typ) internal UVLO; connect external resistor divider to set custom 4.5V–24V threshold. |
| 5 - OVLO | Overvoltage threshold programming node | Connect to GND for 33V (typ) internal OVLO; connect external resistor divider to set custom 6V–36V threshold. |
| 6 - SETI | Current limit programming input | Resistor to GND sets 0.7A–4.2A limit; unconnected = 0A; tied to GND = immediate FLAG assertion and FET disable. |
| 7 - GND | Analog and power ground reference | Primary return path; EP (exposed pad) must be soldered to large PCB ground plane for thermal performance. |
| 8 - HVEN | High-voltage active-low enable | Drives low (≤3.5V) for normal operation; withstands up to +36V; enables system-level reset without logic-level isolation. |
| 9 - RIEN | Reverse-current enable control | Logic-high enables reverse-current blocking; GND disables blocking - critical for inductive load freewheeling paths. |
| 10 - EN | Active-high logic enable | Standard CMOS-compatible input (VIH ≥ 1.4V); independent of HVEN for dual-control redundancy. |
| 11 - FLAG | Open-drain fault status output | Asserts low on any fault condition; requires external pullup; signals host controller without level-shifting. |
| 12, 13, 14 - OUT | Protected output terminal | Delivers regulated power after protection logic; bypassed with 1µF ceramic capacitor near device for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous current limiting | Maintains constant output current at programmed threshold during overload - avoids system brownouts or latch-up seen in autoretry/latch-off variants. |
| ±40V input fault tolerance | Withstands transient surges beyond industrial 24V/36V rails without damage - eliminates need for external TVS in many designs. |
| Independent dual enable inputs | HVEN handles high-voltage system control (e.g., 24V PLC backplane), while EN interfaces directly with microcontroller GPIO - no level shifters required. |
| Reverse-current blocking | Prevents backfeed from OUT to IN when RIEN is asserted - essential for protecting upstream supplies in motor drive or solenoid circuits. |
| Input debounce timing | 15–18.4ms delay before enabling FETs after UVLO crossing - suppresses false turn-on during supply ramp-up or noisy EN/HVEN transitions. |
Applications
| Industrial Motor Control | Marine Battery Management |
|---|---|
Use Scenario: Protecting PLC I/O modules from 24V rail faults caused by cable shorts or lightning-induced transients in offshore equipment cabinets. IC Role / Device Role / Timing Role: Primary overvoltage/overcurrent guard between 24V distribution bus and sensitive digital I/O circuitry. Use Value: Continuous current limiting prevents repeated cycling that could disrupt real-time control loops; 100mΩ RON minimizes voltage drop under full 4.2A load. |
Use Scenario: Securing auxiliary 12V/24V power feeds in navigation systems exposed to saltwater corrosion and alternator voltage spikes. IC Role / Device Role / Timing Role: Input protector for GPS, radar, and comms subsystems requiring uninterrupted operation despite battery voltage fluctuations. Use Value: Factory-trimmed 33V OVLO and 19.2V UVLO match marine alternator regulation limits; ±40V fault tolerance absorbs load-dump transients. |
| Factory Automation Sensors | Portable Test Equipment |
Use Scenario: Powering fieldbus nodes (e.g., IO-Link masters) in manufacturing cells where ESD and cable coupling induce ±30V transients. IC Role / Device Role / Timing Role: Front-end protection IC placed directly at connector entry point to absorb fast-rising surges before reaching ASICs. Use Value: Q15kV HBM ESD rating on IN (with 1µF cap) meets IEC 61000-4-2 Level 4; reverse-current blocking isolates sensor ground from shared chassis. |
Use Scenario: Enabling hot-swap capability in handheld multimeters and oscilloscope probes powered from USB-C PD or Li-ion packs. IC Role / Device Role / Timing Role: Fault-tolerant power switch managing battery-to-load connection with visible fault signaling via FLAG. Use Value: Open-drain FLAG directly drives LED indicators or MCU interrupt pins; continuous limiting allows safe measurement continuity during probe short events. |
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 |
|---|---|---|---|
| MAX14571EUD+ | Autoretry fault response (20.7ms blanking + 600ms retry); no continuous current limiting | Suitable for non-critical loads where periodic re-enabling is acceptable; not for real-time systems requiring uninterrupted current | Select MAX14571EUD+ only if system can tolerate brief power interruptions during faults and requires lower average power dissipation. |
| TPS26631RGER | Fixed 36V OVLO, 4.5V UVLO; 4.2A limit with ±10% accuracy; integrated 120mΩ FETs; no reverse-current blocking | Lacks programmable thresholds and reverse-current enable; optimized for telecom DC/DC front-ends rather than industrial transients | Choose TPS26631RGER for cost-sensitive telecom applications with fixed rail voltages and no inductive backfeed requirements. |
Compared with MAX14571EUD+, the MAX14573EUD+ eliminates disruptive power cycling during sustained overloads - critical for deterministic control systems. Against TPS26631RGER, it offers wider threshold adjustability, superior reverse-current management, and tighter OVLO/UVLO accuracy, justifying use in mission-critical industrial deployments.
Availability
MAX14573EUD+ is available at Aetrix Electronics and suitable for industrial motor control, marine battery management, factory automation sensors, and portable test equipment requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX14573EUD+ 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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX1457x family targets high-reliability power rail protection in harsh environments - delivering integrated overvoltage, overcurrent, reverse-current, and thermal safeguards in a single compact package for 24V/36V industrial systems.
FAQ
What is the key functional difference between MAX14573EUD+ and MAX14571EUD+?
The MAX14573EUD+ implements continuous current limiting: when load current exceeds the SETI-programmed threshold, it clamps output current indefinitely without turning off. In contrast, the MAX14571EUD+ uses autoretry - turning off for 600ms after a 20.7ms blanking period, then attempting re-enabling. This makes MAX14573EUD+ essential for applications requiring uninterrupted current flow during overload, such as real-time motor control or sensor biasing where power interruption would cause system failure.
How does the MAX14573EUD+ handle reverse current, and what is required to activate it?
The MAX14573EUD+ blocks reverse current (OUT → IN) when the RIEN pin is driven logic-high; connecting RIEN to GND disables this feature. Reverse-current blocking activates at VOUT − VIN ≥ 40mV and limits reverse leakage to ≤600nA above 160mV. This is critical in inductive-load applications like solenoid drivers or motor H-bridges, where back-EMF could otherwise feed into upstream supplies - ensuring system-level isolation without external diodes.
Can the MAX14573EUD+ be used with input voltages below 4.5V?
No - the MAX14573EUD+ has a minimum operating input voltage of 4.5V per its absolute maximum ratings and electrical characteristics table. Below this, UVLO will assert and the internal FETs remain off. The device is not specified for 3.3V or 5V-only systems; for lower-voltage applications, consider dedicated low-VIN protectors such as the MAX14747 or TPS25942, which support down to 2.7V operation.
What thermal considerations apply when using MAX14573EUD+ in continuous current-limit mode?
In continuous current-limit mode, the MAX14573EUD+ dissipates power as I2RON; at 4.2A and 160mΩ (max RON), this reaches ~2.8W. With θJA = 39°C/W, junction temperature rise could exceed +150°C without adequate heatsinking. To prevent thermal shutdown, use the exposed pad (EP) soldered to a ≥2cm² copper pour, add ≥4 thermal vias, and limit sustained fault duration. Derate current limit in enclosed enclosures above +60°C ambient.
Is the MAX14573EUD+ pin-compatible with other devices in the MAX1457x family?
Yes - all MAX14571/MAX14572/MAX14573 variants share identical 14-pin TSSOP-EP packaging, pinout, and footprint. The only differences are internal fault-handling logic (autoretry vs. latch-off vs. continuous limit) and minor parameter tolerances. This allows direct PCB-level substitution during design iteration or qualification - for example, prototyping with MAX14573EUD+ and qualifying MAX14571EUD+ for lower-power applications - without layout changes.
MAX14573EUD+ 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
MAX14573EUD+ FAQ
1.How can I place an order for MAX14573EUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14573EUD+ 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 MAX14573EUD+ reliable?
The price and inventory of MAX14573EUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14573EUD+ is usually 5 days.
3.What payment methods are accepted for MAX14573EUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14573EUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14573EUD+?
MAX14573EUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14573EUD+ 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 MAX14573EUD+?
For technical support, including MAX14573EUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14573EUD+ requirements.
6.How does Aetrix verify that MAX14573EUD+ is sourced from the original manufacturer or authorized distributors?
All MAX14573EUD+ 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 MAX14573EUD+ meets industry standards.
7.What is the process for return or replacement of MAX14573EUD+?
All MAX14573EUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14573EUD+, 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 MAX14573EUD+ part is unused and in its original packaging.
Return procedure for MAX14573EUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14573EUD+ Tags
-
TVS3300DRVR
Texas Instruments
-
TCPP01-M12
STMicroelectronics
-
TPD4S214YFFR
Texas Instruments
-
TPD6S300ARUKR
Texas Instruments
-
TBU-CA085-300-WH
Bourns Inc.
-
TBU-CA065-500-WH
Bourns Inc.
-
TBU-CA040-100-WH
Bourns Inc.
-
TBU-CA085-500-WH
Bourns Inc.
-
TBU-CA085-200-WH
Bourns Inc.
-
NX20P0408UKZ
NXP Semiconductors
-
TBU-CA085-100-WH
Bourns Inc.
-
TBU-CA050-300-WH
Bourns Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
