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Analog Devices Inc./Maxim Integrated MAX14722ATP+
- Part No.:
- MAX14722ATP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Power Management - Specialized
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX14722ATP+.pdf
- Description:
- IC CURRENT LIMIT ADJ 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,592
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Product details
Overview
MAX14722ATP+ from Maxim Integrated is a high-accuracy, adjustable power limiter IC designed for robust overvoltage, undervoltage, and overcurrent protection in industrial power systems. It integrates a 76mΩ nFET, supports input voltage range +5.5V to +60V, provides programmable current limiting from 0.2A to 2A (±15% accuracy), and features dual-stage startup with 1.5× initial current limit. It is used to protect downstream circuitry-such as motion drive controllers or HMI power rails-against faults including reverse-voltage transients up to –60V (with external pFET).
For engineers reviewing the MAX14722ATP+ datasheet, MAX14722ATP+ pinout, MAX14722ATP+ application, or MAX14722ATP+ equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative parts-enabling rapid selection for high-reliability 24V/48V industrial power distribution, motor drive front-end protection, and ruggedized control system design.
Technical Context
The MAX14722ATP+ implements a dual-stage current-limit architecture: during startup, it sustains 1.5× the programmed current limit for 24ms (typ) to rapidly charge large output capacitors, then transitions to steady-state continuous limiting. Its internal control logic coordinates integrated nFET switching, external pFET gate drive (GP pin), reverse-current blocking (–9mV threshold), and thermal foldback at 145°C.
It supports three fault-response modes-autoretry (720ms retry interval), latchoff, and continuous limiting-selected via CLTS1/CLTS2 pins. Overvoltage (OVLO) and undervoltage (UVLO) thresholds are configurable via external resistor dividers (6V–40V OVLO, 5.5V–24V UVLO) or fixed internal defaults (36V OVLO, 12V UVLO), with hysteresis of 6% and 3%, respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +5.5V to +60V - Enables direct use in 24V/48V industrial bus systems without pre-regulation. |
| Integrated FET RON | 76mΩ (typ) - Minimizes conduction loss and self-heating at 2A load (≤304mW dissipation). |
| Programmable Current Limit | 0.2A to 2A (±15% over –40°C to +125°C) - Supports precise ILIM setting for diverse load profiles using single SETI resistor. |
| Startup Current Multiplier | 1.5× programmed limit - Accelerates charging of ≥26mF reservoir capacitors on downstream DC/DC inputs. |
| Reverse-Current Blocking Threshold | –9mV (typ) - Detects reverse flow before damaging backfeed occurs; triggers 2.4ms shutdown with automatic recovery. |
| Operating Temperature Range | –40°C to +125°C - Qualified for under-hood, factory-floor, and enclosed drive cabinet environments. |
| Package | 20-pin TQFN (5mm × 5mm) - High thermal performance (θJA = 32°C/W) with exposed pad for PCB heat sinking. |
Pinout & Package
MAX14722ATP+ is housed in a 20-pin, 5mm × 5mm TQFN package with exposed thermal pad (GND/EP). The package supports high-power dissipation (2500mW at +70°C) and requires connection of the exposed pad to a large copper ground plane per JEDEC JESD51-7 four-layer board standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 2,3,4) | Switch Input / Fault Sensing Node | Primary power input; senses overvoltage/undervoltage; slew rate limited to 30V/µs; bypassed with 1µF ceramic for ESD protection. |
| OUT (Pins 12,13,14) | Switch Output / Protected Power Rail | Delivers regulated, fault-protected output; requires 4.7µF ceramic capacitor placed adjacent to device. |
| GP (Pin 6) | External pFET Gate Driver Output | Drives gate of optional external p-channel MOSFET to enable –60V reverse-voltage tolerance and reverse-current blocking. |
| SETI (Pin 7) | Current-Limit Programming Input | Connects to GND via resistor to set ILIM; open or >30pF capacitance disables startup. |
| FLAG (Pin 8) | Open-Drain Fault Indicator | Asserts low on overcurrent, OVLO/UVLO trip, thermal shutdown, reverse-current event, or VFA exceedance (≥480mV drop). |
| OVLO / UVLO (Pins 9,10) | Configurable Threshold Inputs | Accept external resistor dividers to set OVLO (6–40V) or UVLO (5.5–24V); tied to GND for internal 36V/12V defaults. |
| RIPEN (Pin 16) | Reverse-Current Protection Enable | Internally pulled up; connect ≤10kΩ to GND to disable reverse-blocking function. |
| HVEN (Pin 17) | High-Voltage Enable Input | 60V-tolerant active-low enable; toggling resets fault latches; compatible with PLC-level 24V control signals. |
| CLTS1 / CLTS2 (Pins 18,19) | Current-Limit Mode Select | Set autoretry, latchoff, or continuous mode per Table 2; internally pulled up to 5V; 10kΩ-to-GND pulls low. |
| EN (Pin 20) | Low-Voltage Enable Input | Active-high enable (max 5V); toggling resets faults; used with microcontroller GPIOs or logic-level supervisors. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-stage startup current limiting | 1.5× programmed limit for 24ms enables fast ramp-up of large downstream capacitors without thermal stress. |
| Thermal foldback protection | Reduces current linearly above 145°C junction temperature-maintaining partial functionality while preventing catastrophic failure. |
| Reverse-current blocking with auto-recovery | Shuts off both internal nFET and external pFET for 2.4ms upon –9mV detection, then restarts using dual-stage startup sequence. |
| Configurable fault response modes | Autoretry (720ms cycle), latchoff, or continuous limiting selected via two logic inputs-no firmware required. |
| 60V-tolerant HVEN input | Direct interface to industrial 24V/48V control buses without level-shifting, reducing BOM count and layout complexity. |
Applications
| Industrial Motor Drives | Programmable Logic Controller (PLC) Power Inputs |
|---|---|
Use Scenario: Protecting 48V DC bus feeding servo amplifier modules against input overvoltage surges and reverse battery connection. IC Role / Device Role / Timing Role: Primary front-end protection IC; monitors IN/OUT differential voltage and controls external pFET gate (GP) to block –60V faults. Use Value: Prevents damage to sensitive gate drivers and current-sense amplifiers; eliminates need for discrete TVS + series diode + fuse stack. |
Use Scenario: Securing 24V auxiliary power rail supplying CPU, I/O modules, and communication interfaces in modular PLC chassis. IC Role / Device Role / Timing Role: Adjustable power limiter with programmable UVLO (12V default) and OVLO (36V default) to maintain clean brownout-free operation. Use Value: Ensures deterministic power-on sequencing and prevents lockup during line dips; FLAG output feeds PLC watchdog timer. |
| Human Machine Interface (HMI) Power Distribution | Factory Automation Control Panels |
Use Scenario: Delivering protected 24V power to touchscreen controllers, backlight inverters, and USB peripherals in panel-mounted HMIs. IC Role / Device Role / Timing Role: High-accuracy current limiter (0.2–2A) with ±15% tolerance across –40°C to +125°C for consistent trip behavior in uncooled enclosures. Use Value: Avoids nuisance tripping during cold-start backlight surge; maintains uptime in ambient temperatures exceeding 70°C. |
Use Scenario: Guarding distributed I/O module power inputs against wiring errors, accidental short circuits, and ESD-induced latch-up. IC Role / Device Role / Timing Role: Fault manager with autoretry mode (720ms cycle) and open-drain FLAG signaling to central controller. Use Value: Enables self-clearing faults without operator intervention; reduces mean time to repair (MTTR) by >90% versus manual reset designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable power limiter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14723ATP+ | 2× startup current multiplier (vs. 1.5×), identical pinout, same package and specs otherwise. | Better suited for systems with >50mF output capacitance requiring faster initial charge. | Select MAX14723ATP+ only if measured tSTI < 24ms is insufficient; otherwise MAX14722ATP+ offers optimal balance of speed and thermal margin. |
| TPS26631RGER | Lower RON (42mΩ), fixed 36V OVLO, no UVLO adjustment, no reverse-current blocking, 16-pin WQFN. | Targeted at simpler 24V telecom/datacom supplies where reverse protection is handled externally. | Choose TPS26631RGER for cost-sensitive, space-constrained designs without reverse-voltage risk; MAX14722ATP+ remains superior for full-feature industrial protection. |
Compared with MAX14723ATP+, MAX14722ATP+ reduces peak startup power dissipation by 25% while maintaining compatibility; versus TPS26631RGER, it adds critical reverse-current blocking, UVLO adjustability, and wider OVLO range-justifying its use in harsher industrial environments.
Availability
MAX14722ATP+ is available at Aetrix Electronics and suitable for industrial power systems, motion system drives, human machine interfaces, and high-power control panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX14722ATP+ 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 industrial, automotive, and communications markets.
The MAX14721–MAX14723 family was designed specifically for ruggedized front-end power protection in industrial automation-delivering integrated overvoltage, undervoltage, overcurrent, reverse-current, and thermal protection in a single 5mm × 5mm package.
FAQ
What is the startup current limit behavior of the MAX14722ATP+?
The MAX14722ATP+ applies a 1.5× multiplier to the programmed current limit for 24ms (typ) during startup to rapidly charge large output capacitors. After this interval, it reverts to the steady-state programmed limit. This dual-stage behavior is fixed for MAX14722ATP+ and differs from MAX14721ATP+ (1×) and MAX14723ATP+ (2×). The MAX14722ATP+ does not require configuration to activate this feature-it is inherent to the device variant.
How does the MAX14722ATP+ achieve –60V reverse-voltage protection?
The MAX14722ATP+ achieves –60V reverse-voltage tolerance by driving an external p-channel MOSFET via its GP pin. When VIN falls below VOUT by –9mV (typ), the device turns off both its internal nFET and the external pFET for 2.4ms. This requires a pFET rated for –60V VGS and proper gate resistor selection per the datasheet. The MAX14722ATP+ itself does not withstand –60V directly on IN-external pFET is mandatory for that rating.
Can the MAX14722ATP+ operate without an external pFET?
Yes, the MAX14722ATP+ operates fully without an external pFET: it provides +5.5V to +60V overvoltage/undervoltage/overcurrent protection using its integrated 76mΩ nFET. However, reverse-current blocking and –60V reverse-voltage tolerance require the external pFET connected to the GP pin. If reverse protection is unnecessary, RIPEN can be tied to GND to disable the function, and the GP pin left unconnected.
What are the key differences between MAX14722ATP+ and MAX14721ATP+?
The core difference is startup current behavior: MAX14722ATP+ uses 1.5× the programmed limit during startup, while MAX14721ATP+ uses 1×. All other specifications-including pinout, package, OVLO/UVLO ranges, RON, temperature range, and fault modes-are identical. Both share the same 20-pin TQFN package and are drop-in replacements except where startup surge current headroom is critical.
How is overvoltage lockout configured on the MAX14722ATP+?
Overvoltage lockout on the MAX14722ATP+ is configured via the OVLO pin (Pin 9). Tying OVLO to GND selects the internal 36V (typ) threshold. For custom thresholds between 6V and 40V, connect an external resistor divider from IN to GND with the OVLO pin at the midpoint. The device compares the OVLO voltage to a 0.38V internal reference (VOVLO_SEL) to determine trip point-no additional components beyond the divider are needed.
MAX14722ATP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 1.4mA
- Voltage - Supply:
- 5.5V ~ 58V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (4x4)
MAX14722ATP+ FAQ
1.How can I place an order for MAX14722ATP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14722ATP+ 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 MAX14722ATP+ reliable?
The price and inventory of MAX14722ATP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14722ATP+ is usually 5 days.
3.What payment methods are accepted for MAX14722ATP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14722ATP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14722ATP+?
MAX14722ATP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14722ATP+ 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 MAX14722ATP+?
For technical support, including MAX14722ATP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14722ATP+ requirements.
6.How does Aetrix verify that MAX14722ATP+ is sourced from the original manufacturer or authorized distributors?
All MAX14722ATP+ 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 MAX14722ATP+ meets industry standards.
7.What is the process for return or replacement of MAX14722ATP+?
All MAX14722ATP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14722ATP+, 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 MAX14722ATP+ part is unused and in its original packaging.
Return procedure for MAX14722ATP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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