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Analog Devices Inc./Maxim Integrated MAX17561AUD+
- Part No.:
- MAX17561AUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Power Management - Specialized
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX17561AUD+.pdf
- Description:
- IC OVERVOLTAGE PROTECTOR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,206
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Product details
Overview
The MAX17561AUD+ from Maxim Integrated is an adjustable overvoltage and overcurrent protection IC designed for industrial power rail protection. It features 100mΩ (typ) internal FETs, programmable current limiting from 0.7A to 4.2A with ±15% accuracy, factory-preset OVLO at 33V (typ), and operates across –40°C to +125°C in a 14-pin TSSOP package. It is used in battery-powered systems requiring robust fault recovery under short-circuit conditions.
For engineers reviewing the MAX17561AUD+ datasheet, MAX17561AUD+ pinout, MAX17561AUD+ application, or MAX17561AUD+ equivalent, key selection criteria include autoretry-mode current-limit behavior, reverse-current blocking threshold of 30–70mV, thermal shutdown at +150°C (with 30°C hysteresis), and compatibility with –40V to +40V input fault tolerance.
Technical Context
The MAX17561AUD+ implements autoretry-mode overcurrent protection: after a 20.7ms (typ) blanking time, it asserts FLAG and disables output for 600ms (typ) before re-enabling. Its dual enable inputs-EN (active-high) and HVEN (36V-tolerant active-low)-allow flexible system-level control and fault reset without power cycling.
It integrates precision bandgap reference (1.210V typ), external resistor-programmable OVLO (6–36V) and UVLO (4.5–24V), and reverse-current enable (RIEN) logic that blocks OUT→IN flow when grounded. The device uses internal FETs with RON stable across temperature and supply voltage, enabling consistent power delivery during transient faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcurrent Protection Mode | Autoretry: 20.7ms blanking + 600ms retry cycle enables self-recovery from temporary shorts |
| Current Limit Range | 0.7A to 4.2A via SETI-to-GND resistor; ±15% accuracy ensures predictable trip thresholds |
| OVLO Threshold | Factory preset 33V (typ); externally adjustable 6V–36V supports wide input rail flexibility |
| UVLO Threshold | Factory preset 19.2V (typ); externally adjustable 4.5V–24V prevents brownout operation |
| RON (FET) | 100mΩ (typ) at ILOAD = 100mA, VIN ≥ 8V - minimizes conduction loss and thermal rise |
| Reverse Blocking Threshold | 30–70mV (VOUT–VIN) - fast detection of reverse current flow |
| Operating Temp Range | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| Input Fault Tolerance | –40V to +40V on IN pin - withstands severe positive/negative transients without damage |
Pinout & Package
Package: 14-pin TSSOP-EP (5mm × 6.5mm), exposed pad connected to GND for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, IN | Input voltage rail connection | Accepts –40V to +40V; bypassed with 0.47µF ceramic capacitor for ESD and transient immunity |
| 4, UVLO | Undervoltage lockout threshold select | Connect to GND for 19.2V (typ) internal threshold; resistor divider enables custom UVLO setting |
| 5, OVLO | Overvoltage lockout threshold select | Connect to GND for 33V (typ) internal threshold; resistor divider enables custom OVLO setting |
| 6, SETI | Current limit programming input | Resistor to GND sets 0.7–4.2A limit; <1V (typ) forces FET off and asserts FLAG |
| 7, GND | Power and signal reference ground | Common return path; EP must be soldered to same GND plane with multiple thermal vias |
| 8, HVEN | High-voltage enable input | 36V-tolerant active-low control; toggling resets latched faults or initiates power-up sequence |
| 9, RIEN | Reverse current enable | Ground to activate reverse-current blocking; logic-high disables protection for bidirectional use |
| 10, EN | Active-high enable input | Standard CMOS-compatible control; used with HVEN per Table 1 for precise switch state management |
| 11, FLAG | Open-drain fault indicator | Pulled low on OVLO/UVLO trip, overcurrent timeout, thermal shutdown, or SETI undervoltage |
| 12–14, OUT | Protected output rail | Delivers regulated power to load; bypassed with 1µF ceramic capacitor placed ≤5mm from pins |
Key Features
| Feature | Design Value |
|---|---|
| Autoretry overcurrent response | Enables automatic recovery from intermittent faults without host intervention or power cycle |
| Reverse-current blocking | 30–70mV detection threshold with sub-2µs response time prevents backfeed into source |
| Dual enable architecture | HVEN (36V-tolerant) + EN (CMOS) allows safe sequencing and fault reset in mixed-voltage systems |
| Thermal shutdown with hysteresis | +150°C trip / +120°C release prevents oscillation during sustained overload conditions |
| Input debounce timing | 15–18.4ms delay prevents false turn-on during noisy or slow-ramping supply startup |
| ESD robustness | ±15kV HBM on IN (with 0.47µF bypass) meets industrial IEC 61000-4-2 surge immunity requirements |
Applications
| Industrial Power Supplies | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Protecting PLC I/O modules from field-wiring faults including reverse polarity, hot-swap surges, and cable-induced transients. IC Role / Device Role / Timing Role: Primary front-end protection IC; monitors VIN continuously and disables output within microseconds upon OVLO/UVLO or overcurrent detection. Use Value: Eliminates need for discrete TVS diodes and fuse-based protection, reducing BOM count and board space while improving MTBF. | Use Scenario: Safeguarding portable multimeters and handheld oscilloscopes during accidental probe misconnection or battery reversal. IC Role / Device Role / Timing Role: Standby-mode protector; remains enabled only when EN/HVEN signals confirm valid system state, minimizing quiescent drain. Use Value: Prevents catastrophic damage from user-induced faults while maintaining >10-year shelf life via ultra-low shutdown current (9µA typ). |
| Marine Navigation Systems | Consumer Audio Amplifiers |
Use Scenario: Securing GPS/chartplotter power inputs exposed to 24V marine battery fluctuations, load-dump spikes, and salt-mist corrosion-induced leakage paths. IC Role / Device Role / Timing Role: Fault-isolation switch; blocks reverse current during alternator dropout and asserts FLAG for system-level logging and diagnostics. Use Value: Ensures uninterrupted operation during engine cranking dips and prevents data corruption due to brownout-induced MCU resets. | Use Scenario: Protecting Class-D amplifier rails against speaker wire shorts, ESD events, and accidental DC coupling during setup. IC Role / Device Role / Timing Role: In-line current limiter; limits peak fault current to 4.2A while maintaining audio signal integrity via low RON and minimal voltage drop. Use Value: Avoids audible pop/click artifacts during fault clearing and enables silent recovery without muting circuitry or microcontroller involvement. |
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 |
|---|---|---|---|
| MAX17562AUD+ | Latch-off overcurrent response instead of autoretry; no retry cycle - stays off until EN/HVEN toggle or power cycle | Suitable where permanent fault isolation is required (e.g., safety-critical subsystems) | Select MAX17562AUD+ when system firmware cannot handle repeated fault assertions or when hardware interlock is mandatory |
| TPS26631PWPR | Fixed 36V OVLO, no UVLO adjustment; 0.9A–4.5A current limit; integrated charge pump for low RON | Optimized for USB PD and PoE-powered devices; lacks reverse-current enable and –40V input tolerance | Choose TPS26631PWPR for cost-sensitive consumer designs with standard 24V/36V rails and no negative fault exposure |
Compared with MAX17562AUD+, the MAX17561AUD+ provides autonomous fault recovery without host intervention; compared with TPS26631PWPR, it offers wider fault voltage range (–40V to +40V), programmable UVLO, and dedicated reverse-current control - critical for harsh industrial and marine deployments.
Availability
MAX17561AUD+ is available at Aetrix Electronics and suitable for industrial power supplies, battery-powered test equipment, marine navigation systems, and consumer audio amplifiers requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX17561AUD+ 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.
The MAX17561AUD+ belongs to the MAX1756x family of adjustable overvoltage/overcurrent protectors, engineered specifically for robust front-end power rail hardening in environments with frequent electrical transients and wide input voltage variation.
FAQ
What is the default overvoltage lockout threshold for the MAX17561AUD+?
The MAX17561AUD+ has a factory-preset internal overvoltage lockout (OVLO) threshold of 33V (typical), activated when the OVLO pin is connected to GND. This value is guaranteed between 32V and 34V over temperature. External resistor dividers can adjust the threshold from 6V to 36V if the OVLO pin voltage exceeds 0.50V - the external select threshold.
How does the MAX17561AUD+ respond to an overcurrent condition?
Upon detecting current exceeding the programmed limit, the MAX17561AUD+ waits 20.7ms (typical blanking time), then asserts FLAG and turns off the internal FETs for 600ms (typical retry time) before automatically re-enabling. This autoretry behavior repeats until the fault clears, enabling self-recovery without host action - a key differentiator from latch-off alternatives like the MAX17562AUD+.
Can the MAX17561AUD+ block reverse current flow from OUT to IN?
Yes - the MAX17561AUD+ includes reverse-current blocking with a 30–70mV detection threshold (VOUT–VIN). When the RIEN pin is grounded, the device actively blocks reverse current flow within ≤2.0µs. If RIEN is pulled high, reverse-current protection is disabled, allowing bidirectional operation where needed.
What is the purpose of the SETI pin on the MAX17561AUD+?
The SETI pin on the MAX17561AUD+ programs the overcurrent limit using a resistor to GND. A 12kΩ resistor sets ~1A; values from ~2.75kΩ to 16.2kΩ configure 4.2A down to 0.7A. If SETI is unconnected, the current limit defaults to 0A; if pulled below 1V (typ), the FETs disable and FLAG asserts - providing fail-safe configuration detection.
Does the MAX17561AUD+ require external components for basic operation?
Yes - minimum external components include: a 0.47µF ceramic capacitor from IN to GND (for ESD and transient suppression), a 1µF ceramic capacitor from OUT to GND (for stability), and pullup resistors on FLAG and EN/HVEN as needed. Optional resistors on OVLO/UVLO and SETI enable full programmability, but connecting OVLO/UVLO to GND activates factory presets.
MAX17561AUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 490µA
- Voltage - Supply:
- 4.5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP-EP
MAX17561AUD+ FAQ
1.How can I place an order for MAX17561AUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17561AUD+ 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 MAX17561AUD+ reliable?
The price and inventory of MAX17561AUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17561AUD+ is usually 5 days.
3.What payment methods are accepted for MAX17561AUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17561AUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17561AUD+?
MAX17561AUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17561AUD+ 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 MAX17561AUD+?
For technical support, including MAX17561AUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17561AUD+ requirements.
6.How does Aetrix verify that MAX17561AUD+ is sourced from the original manufacturer or authorized distributors?
All MAX17561AUD+ 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 MAX17561AUD+ meets industry standards.
7.What is the process for return or replacement of MAX17561AUD+?
All MAX17561AUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17561AUD+, 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 MAX17561AUD+ part is unused and in its original packaging.
Return procedure for MAX17561AUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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