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Analog Devices Inc./Maxim Integrated MAX14523CATA+T
- Part No.:
- MAX14523CATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX14523CATA+T.pdf
- Description:
- IC CURRENT SWITCH 10% 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
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Product details
Overview
MAX14523CATA+T from Maxim Integrated is a programmable current-limit switch designed for high-reliability load-switching in portable and automotive electronics. It features continuous current-limit operation (not autoretry or latchoff), 70mΩ on-resistance, adjustable 250mA–1.5A current limit via external resistor, and reverse-current blocking - enabling robust SDIO, USB, and GPS port protection.
For engineers reviewing the MAX14523CATA+T datasheet, MAX14523CATA+T pinout, MAX14523CATA+T application, or MAX14523CATA+T equivalent, this page delivers verified electrical parameters, thermal shutdown behavior, FLAG fault signaling timing, and precise TDFN-8 package layout guidance for production-grade integration.
Technical Context
The MAX14523CATA+T implements a fixed-blanking-time continuous current-limit architecture: when output current reaches the programmed threshold, it clamps current without shutting down - maintaining regulated conduction while asserting FLAG after tBLANK (10–25ms). Unlike MAX14523A/B variants, it does not cycle or latch off during overload.
Its internal BiCMOS FET delivers 70mΩ RON at 3.3V with ±10% current-limit accuracy, reverse-current blocking below 2µA, and thermal shutdown activation at +170°C (15°C hysteresis). The open-drain FLAG output signals overcurrent, reverse-current, or thermal fault conditions independently of control logic state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Range | 250mA to 1.5A, set by external SETI resistor - enables precise matching to load requirements without redesign. |
| On-Resistance (RON) | 70mΩ typical at VIN = 3.3V - minimizes dropout voltage (70mV at 1A) and power loss in battery-powered systems. |
| Supply Voltage Range | +1.7V to +5.5V - supports single-cell Li-ion, 3.3V, and 5V rail applications including USB and SDIO ports. |
| FLAG Assertion Delay | tBLANK = 10–25ms - prevents false fault triggering during inrush or transient load spikes. |
| Thermal Shutdown Threshold | +170°C (typ), 15°C hysteresis - protects against sustained short-circuit power dissipation in confined PCB layouts. |
| Reverse-Current Blocking | <2µA leakage when VOUT > VIN + 140mV - eliminates backfeed risk in multi-rail systems like notebook VGA or UTCA platforms. |
| Quiescent Current | 170µA typical - ensures minimal standby power draw in always-on mobile peripherals. |
Pinout & Package
MAX14523CATA+T uses an 8-pin, 3mm × 3mm TDFN-EP package with exposed pad (EP) internally connected to GND for enhanced thermal dissipation. Pin 1 and 6 are No Connect (N.C.) - must be left floating or tied to GND per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 | N.C. | No internal connection - no electrical function; connect to GND or leave unconnected per layout best practice. |
| 2 | FLAG | Open-drain fault indicator - pulls low on overcurrent, reverse-current, thermal shutdown, or SETI-to-GND condition; requires external pullup. |
| 3 | SETI | Current-limit programming input - resistor to GND sets ILIM; open = 0mA limit; grounded = switch disable + FLAG assert. |
| 4 | OUT | Switch output - connects to protected load; bypass with 1µF ceramic capacitor to GND for stability. |
| 5 | IN | Power input - accepts +1.7V to +5.5V; bypass with ≥1µF ceramic capacitor to suppress supply droop during faults. |
| 7 | ON | Active-high enable input - logic high turns switch ON; toggling resets latchoff mode (not applicable to MAX14523C). |
| 8 | GND | Ground reference - primary return path; EP must also connect to large copper ground plane. |
| EP | Exposed Pad | Internally tied to GND - mandatory thermal connection to PCB ground plane for θJA = 41°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous current-limit operation | Maintains regulated output current during overload - avoids system reset cycles required by autoretry/latchoff variants. |
| ±10% accurate current limiting | Enables predictable fault response across temperature (-40°C to +125°C) without calibration overhead. |
| Reverse-current blocking | Prevents backfeed into source rail - critical for shared-bus architectures like UTCA/ATCA and multi-port notebooks. |
| Low 70mΩ RON | Reduces conduction loss and thermal stress - supports 1.5A loads with <105mW dissipation at 3.3V. |
| Integrated thermal shutdown | Self-protects under sustained short-circuit - automatically recovers after 15°C cooldown, eliminating manual intervention. |
Applications
| SDIO Port Protection | USB 2.0 Host Port |
|---|---|
Use Scenario: Protecting SD card slots in automotive infotainment head units from hot-plug surge and card short-circuits. IC Role / Device Role / Timing Role: High-side current-limit switch with continuous clamping and FLAG-driven firmware fault logging. Use Value: Prevents host controller damage while maintaining bus availability - no port reset needed during transient overloads. |
Use Scenario: Power switching for USB peripheral ports in industrial tablets where cable shorts must not disrupt main SoC operation. IC Role / Device Role / Timing Role: Load switch with reverse-current blocking and thermal-aware current regulation. Use Value: Eliminates backfeed into VBUS during peripheral disconnection and sustains regulated 500mA delivery under sustained overload. |
| Notebook VGA Output | GPS Module Power Control |
Use Scenario: Isolating VGA output circuitry from GPU rail in thin-and-light laptops during display hot-unplug events. IC Role / Device Role / Timing Role: Low-RON current limiter with fast 3µs reaction time and 10–25ms blanking window. Use Value: Limits inrush to <1.5A while preserving signal integrity - avoids GPU rail collapse and display flicker. |
Use Scenario: Enabling/disabling GPS receiver modules in telematics units where antenna short-circuits must not drain backup battery. IC Role / Device Role / Timing Role: Programmable 250mA–1.5A switch with ultra-low 0.6µA shutdown reverse current. Use Value: Extends backup battery life by >99% during GPS sleep mode while ensuring instant turn-on capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14523BATA+ | Latches off permanently during overcurrent - requires ON pin toggle or VIN cycle to recover. | Suitable for safety-critical systems requiring hard fault isolation (e.g., automotive ECU power domains). | Select MAX14523BATA+ only if guaranteed fault containment without automatic recovery is required. |
| TPL7407LDR | Fixed 700mA limit, no SETI adjustment; 120mΩ RON; no reverse-current blocking or FLAG output. | Better for cost-sensitive, non-critical loads where programmability and diagnostics are unnecessary. | Choose TPL7407LDR for simple on/off control in consumer accessories with stable load profiles. |
Compared with MAX14523BATA+, MAX14523CATA+ provides uninterrupted power delivery during faults - ideal for user-facing ports. Versus TPL7407LDR, it offers precision current setting, lower RON, and comprehensive fault visibility via FLAG, justifying use in mission-critical embedded designs.
Availability
MAX14523CATA+T is available at Aetrix Electronics and suitable for SDIO port protection, USB 2.0 host power management, and GPS module enable/disable applications requiring stable component supply across automotive (-40°C to +125°C) and industrial operating conditions.
Supply support for MAX14523CATA+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) designs high-performance analog and mixed-signal ICs for demanding environments including automotive, industrial, and communications systems.
The MAX14523 family targets robust load-switching in space-constrained portable and automotive electronics - delivering programmable current limiting, fault diagnostics, and thermal resilience in miniature TDFN packages.
FAQ
What is the key functional difference between MAX14523CATA+T and other MAX14523 variants?
The MAX14523CATA+T operates exclusively in continuous current-limit mode: when overload occurs, it clamps output current at the programmed threshold without turning off. This differs from MAX14523A (autoretry), MAX14523AL (active-low autoretry), and MAX14523B (latchoff). As a result, MAX14523CATA+T maintains uninterrupted power to the load during faults - critical for applications like SDIO or GPS where session continuity matters.
How do I set the current limit for MAX14523CATA+T using the SETI pin?
To set the current limit for MAX14523CATA+T, connect a resistor (RSETI) between the SETI pin and GND. Use the formula ILIM(mA) = 141.4kΩ / (RSETI(kΩ) − 2.48kΩ); valid RSETI range is 91.78kΩ to 563.12kΩ for 1.5A to 250mA limits. For example, 91.78kΩ yields ~1.5A, while 563.12kΩ yields ~250mA. Do not exceed 20pF capacitance on SETI to avoid instability.
Does MAX14523CATA+T provide reverse-current protection, and how does it behave?
Yes, MAX14523CATA+T provides active reverse-current protection: when VOUT exceeds VIN by >140mV, the internal circuit blocks backflow and limits reverse current to <2µA. Unlike forward overcurrent, reverse-current detection asserts FLAG immediately - no blanking delay - and the switch remains on once the condition clears. This prevents battery drain in multi-rail systems such as notebook VGA or UTCA platforms.
What thermal performance can I expect from MAX14523CATA+T in a real PCB layout?
With proper layout - including full connection of the exposed pad (EP) to a large copper ground plane - MAX14523CATA+T achieves θJA = 41°C/W on a four-layer board. Under continuous 1.5A short-circuit at 5.5V, power dissipation reaches ~124mW (70mΩ × 1.5A²), raising junction temperature by ~5.1°C above ambient. Thermal shutdown triggers only if sustained fault power plus ambient exceeds +170°C - making it suitable for enclosed automotive enclosures up to +125°C ambient.
Can MAX14523CATA+T be used in USB Type-C applications?
MAX14523CATA+T is not USB Type-C compliant - it lacks CC logic, VCONN support, and USB PD communication. However, it is well-suited for legacy USB 2.0 Type-A host ports where programmable current limiting (up to 1.5A), reverse-current blocking, and FLAG-based fault reporting are needed. For USB Type-C, pairing MAX14523CATA+T with a dedicated USB-C controller (e.g., MAX14748) is possible but requires external logic coordination.
MAX14523CATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Switch
- Sensing Method:
- -
- Accuracy:
- ±10%
- Voltage - Input:
- 1.7V ~ 5.5V
- Current - Output:
- Adjustable
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX14523CATA+T FAQ
1.How can I place an order for MAX14523CATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14523CATA+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 MAX14523CATA+T reliable?
The price and inventory of MAX14523CATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14523CATA+T is usually 5 days.
3.What payment methods are accepted for MAX14523CATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14523CATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14523CATA+T?
MAX14523CATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14523CATA+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 MAX14523CATA+T?
For technical support, including MAX14523CATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14523CATA+T requirements.
6.How does Aetrix verify that MAX14523CATA+T is sourced from the original manufacturer or authorized distributors?
All MAX14523CATA+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 MAX14523CATA+T meets industry standards.
7.What is the process for return or replacement of MAX14523CATA+T?
All MAX14523CATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14523CATA+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 MAX14523CATA+T part is unused and in its original packaging.
Return procedure for MAX14523CATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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