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Analog Devices Inc./Maxim Integrated MAX14575CETA+T
- Part No.:
- MAX14575CETA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX14575CETA+T.pdf
- Description:
- IC CURRENT LIMITING 10% 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
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Product details
Overview
MAX14575CETA+T from Maxim Integrated is a programmable current-limit switch IC designed for high-reliability load switching in portable and embedded power rails. It features continuous current-limit protection mode, 32mΩ typical on-resistance, adjustable forward current limit from 250mA to 2.5A via external SETI resistor, +2.3V to +5.5V input voltage range, and operates over –40°C to +85°C. It is used in USB port power management where sustained overload must be safely clamped without latch-off or autoretry interruption.
For engineers reviewing the MAX14575CETA+T datasheet, MAX14575CETA+T pinout, MAX14575CETA+T application, or MAX14575CETA+T equivalent, key selection criteria include continuous current-limit behavior (vs. latch-off or autoretry), reverse-current blocking threshold (25–145mV), FLAG open-drain fault signaling, thermal shutdown at +160°C, and TDFN-EP (2mm × 2mm) package compatibility with high-density PCB layouts.
Technical Context
The MAX14575CETA+T implements a fixed-blanking-time continuous current-limit architecture: when output current reaches the programmed ILIM threshold, the internal FET regulates current continuously rather than disabling or cycling. This avoids system reset events during transient overloads, enabling stable operation in SDXC card power-supply protection and RF PA bias rails.
Its reverse-current protection activates immediately upon VOUT − VIN exceeding 25–145mV, asserting FLAG and blocking backflow to <2µA. Thermal shutdown triggers at +160°C (typ) with ~20°C hysteresis, and the FLAG output requires an external pull-up to indicate overload, reverse current, or thermal fault conditions simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Range | 250mA to 2.5A, set by external RSETI (e.g., 53kΩ → 2.5A); enables precise matching to load requirements without redesign. |
| On-Resistance (RON) | 32mΩ (typ) at VIN = 5.5V; minimizes voltage drop and power loss (e.g., <80mV drop at 2.5A), critical for low-voltage rail integrity. |
| Supply Voltage Range | +2.3V to +5.5V; supports direct integration with Li-ion battery outputs, USB 5V, and regulated 3.3V/2.5V system rails. |
| Reverse Blocking Threshold | 25–145mV (VOUT − VIN); prevents backfeed from higher-voltage downstream loads into source, protecting host power supplies. |
| FLAG Assertion Drop | 345mV (VIN − VOUT); defines minimum voltage differential required before FLAG signals overload, ensuring reliable detection under load. |
| Thermal Shutdown | +160°C (typ), with ~20°C hysteresis; provides fail-safe protection during sustained short-circuit or high-ambient thermal stress. |
| Quiescent Current | 130µA (typ); enables ultra-low standby power consumption in always-on or battery-backed systems. |
Pinout & Package
MAX14575CETA+T is housed in an 8-pin, 2mm × 2mm TDFN-EP package with exposed pad connected to GND for thermal enhancement. The package is RoHS-compliant and optimized for high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | GND | Power and signal reference ground; exposed pad (EP) must be soldered to large PCB ground plane for thermal performance. |
| 2 | SETI | Current-limit programming input; connects to GND via precision resistor (e.g., 53kΩ for 2.5A); floating or >20pF capacitance causes instability. |
| 3, 4 | OUT | Switch output; pins 3 and 4 are internally paralleled and must be tied together externally with 1µF ceramic bypass to GND. |
| 5, 6 | IN | Power input; pins 5 and 6 are internally paralleled and require 1µF ceramic bypass to GND near device for transient stability. |
| 7 | EN | Active-high enable input; logic-high (>1.6V) turns switch ON; logic-low (<0.4V) disables output and reduces supply current to 6–20µA. |
| 1 (FLAG) | FLAG | Open-drain fault indicator; pulled low during overload (after blanking time), reverse current, or thermal shutdown; requires external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous current-limit mode | Unlike latch-off or autoretry variants, MAX14575C maintains regulated output current indefinitely during overload-ideal for applications requiring uninterrupted bias or charging. |
| Reverse-current blocking | Blocks backflow to <2µA when VOUT − VIN > 25–145mV; eliminates need for external blocking diodes in bidirectional power domains. |
| Low RON and quiescent current | 32mΩ RON (typ) and 130µA IQ minimize conduction loss and battery drain-critical for portable media players and modem cards. |
| Integrated thermal shutdown | Self-protection at +160°C with 20°C hysteresis prevents permanent damage during sustained fault conditions without external sensors. |
| Programmable blanking time | Fixed 10–25ms tBLANK rejects false trips from inrush or capacitive load turn-on transients while preserving fast fault response. |
Applications
| USB Port Power Management | SDXC Card Power-Supply Protection |
|---|---|
|
Use Scenario: Protecting USB 5V host ports from short circuits or overcurrent caused by faulty peripheral devices. IC Role / Device Role / Timing Role: High-side current-limit switch that remains active during overload, limiting current to safe level without disconnecting bus. Use Value: Prevents host port shutdown or system reset; maintains enumeration and communication continuity during transient faults. |
Use Scenario: Safely powering SDXC memory cards with large decoupling capacitance and variable load profiles. IC Role / Device Role / Timing Role: Adjustable current limiter with reverse-blocking capability, preventing backfeed from card's internal LDO into host supply. Use Value: Eliminates risk of data corruption or card damage due to uncontrolled inrush or reverse current during hot-plug events. |
| RF Power Amplifier Bias Supply | UTCA/ATCA Platform Load Switching |
|
Use Scenario: Delivering stable bias current to cellular RF PAs subject to rapid modulation-induced current spikes. IC Role / Device Role / Timing Role: Continuous current regulator that clamps peak current without interrupting DC bias path during burst transmission. Use Value: Ensures PA linearity and EVM compliance by avoiding voltage droop or supply collapse during high-PAPR waveforms. |
Use Scenario: Hot-swap power control for modular blade servers in telecom infrastructure with strict inrush and fault containment requirements. IC Role / Device Role / Timing Role: Programmable high-side switch with thermal and reverse-current protection, supporting controlled power-up sequencing. Use Value: Enables graceful degradation during module faults while maintaining backplane integrity and system-level fault isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14575BETA+T | Latch-off overcurrent response (not continuous limit); identical pinout, RON, and voltage range. | Suitable where fault isolation is prioritized over continuity-e.g., non-critical peripherals requiring hard disconnect on fault. | Select MAX14575BETA+T only if system firmware can detect FLAG and manually re-enable EN after fault clearance. |
| TPS2557DRCT | 2.5A fixed current limit (non-adjustable); 42mΩ RON; thermal foldback instead of hard shutdown; different pinout (6-pin WSON). | Better suited for cost-sensitive, fixed-limit applications where board space is constrained and thermal foldback is preferred over shutdown. | Choose TPS2557DRCT when design does not require programmability and can accommodate alternate footprint and thermal behavior. |
Compared with MAX14575BETA+T (latch-off) and TPS2557DRCT (fixed-limit, thermal foldback), MAX14575CETA+T uniquely delivers sustained, programmable current regulation during overload-enabling uninterrupted operation in USB, SDXC, and RF PA bias where continuity is mandatory.
Availability
MAX14575CETA+T is available at Aetrix Electronics and suitable for USB port protection, SDXC card power management, RF power amplifier biasing, and UTCA/ATCA platform load switching requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX14575CETA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX14575 family was designed specifically for robust, programmable load switching in space-constrained portable and infrastructure equipment-emphasizing protection integrity, thermal resilience, and seamless integration with microcontroller-based power sequencing.
FAQ
What is the overcurrent response mode of the MAX14575CETA+T?
The MAX14575CETA+T operates in continuous current-limit mode: when output current reaches the programmed threshold (e.g., 2.5A), it actively regulates current at that level indefinitely-without latching off or retry cycling. This ensures uninterrupted power delivery during sustained overload, distinguishing it from the MAX14575BETA+T (latch-off) and MAX14575AETA+T (autoretry). The behavior is confirmed in the Functional Description and Selector Guide sections of the official datasheet.
How do I set the current limit for MAX14575CETA+T?
To set the current limit for MAX14575CETA+T, connect a precision resistor (RSETI) between the SETI pin and GND. For example, a 53kΩ resistor yields ~2.5A, while 510kΩ sets ~250mA. Use the formula ILIM(A) = P(kΩ)/RSETI(kΩ) − C(kΩ), where P = 135kΩ/V and C = 1.35kΩ per datasheet Table 2. Do not leave SETI floating or connect >20pF capacitance, as this causes instability.
Does MAX14575CETA+T provide reverse-current protection?
Yes, MAX14575CETA+T provides active reverse-current protection: if VOUT − VIN exceeds 25–145mV, the internal circuit blocks backflow to <2µA and asserts the FLAG pin immediately-no blanking delay applies. This protects upstream supplies from being loaded by downstream circuits, eliminating the need for external Schottky diodes in bidirectional power paths.
What is the thermal shutdown behavior of MAX14575CETA+T?
MAX14575CETA+T enters thermal shutdown at +160°C (typical junction temperature), turning off the switch and pulling FLAG low. It remains latched off until the die cools by ~20°C (hysteresis), then automatically resumes normal operation. This behavior is identical across the MAX14575 family and is verified in the Absolute Maximum Ratings and Thermal Protection sections of the datasheet.
Can MAX14575CETA+T be used with a 2.3V supply?
Yes, MAX14575CETA+T is fully specified to operate down to +2.3V input voltage, supporting single-cell Li-ion (2.7–4.2V) and low-voltage logic rails. At 2.3V, RON increases slightly but remains within specification (≤50mΩ max), and all protection features-including current limit accuracy, FLAG assertion, and reverse blocking-remain functional across the full –40°C to +85°C temperature range.
MAX14575CETA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Limiting
- Sensing Method:
- High-Side
- Accuracy:
- ±10%
- Voltage - Input:
- 2.3V ~ 5.5V
- Current - Output:
- Adjustable
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX14575CETA+T FAQ
1.How can I place an order for MAX14575CETA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14575CETA+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 MAX14575CETA+T reliable?
The price and inventory of MAX14575CETA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14575CETA+T is usually 5 days.
3.What payment methods are accepted for MAX14575CETA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14575CETA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14575CETA+T?
MAX14575CETA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14575CETA+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 MAX14575CETA+T?
For technical support, including MAX14575CETA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14575CETA+T requirements.
6.How does Aetrix verify that MAX14575CETA+T is sourced from the original manufacturer or authorized distributors?
All MAX14575CETA+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 MAX14575CETA+T meets industry standards.
7.What is the process for return or replacement of MAX14575CETA+T?
All MAX14575CETA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14575CETA+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 MAX14575CETA+T part is unused and in its original packaging.
Return procedure for MAX14575CETA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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