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Analog Devices Inc./Maxim Integrated MAX4995AAUT+T
- Part No.:
- MAX4995AAUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- SOT-23-6
- Datasheet:
-
MAX4995AAUT+T.pdf
- Description:
- IC CURRENT SWITCH 10% SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:6,551
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Product details
Overview
The MAX4995AAUT+T from Maxim Integrated is a programmable current-limit load switch IC designed for fault-protected power delivery in portable and embedded systems. It features 130mΩ (typ) on-resistance, +1.7V to +5.5V supply operation, 50mA–600mA adjustable current limit with ±10% accuracy, autoretry overcurrent response, and reverse-current blocking - enabling robust SDIO/USB port protection in notebook and mobile applications.
For engineers reviewing the MAX4995AAUT+T datasheet, MAX4995AAUT+T pinout, MAX4995AAUT+T application, or MAX4995AAUT+T equivalent, this page delivers verified electrical parameters, package-specific terminal mapping, thermal shutdown behavior, FLAG logic timing, and real-world selection guidance against functionally comparable alternatives.
Technical Context
The MAX4995AAUT+T implements an integrated N-channel MOSFET switch with precision bandgap-referenced current sensing and analog feedback control. Its autoretry fault management uses a fixed 16.3ms blanking time and 524ms retry delay to cycle ON/OFF during sustained overload, reducing average power dissipation by ~97% versus continuous limiting.
It integrates reverse-current detection (110mV threshold), thermal shutdown at +150°C with 15°C hysteresis, and open-drain FLAG assertion for microcontroller fault monitoring. The SETI pin accepts a single resistor to program current limit per the formula ILIM = 29042/(RSETI + 2.48), validated across -40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Range | 50mA to 600mA, set externally via resistor on SETI pin; ±10% accuracy ensures predictable fault trip level. |
| On-Resistance (RON) | 130mΩ (typ) at VIN = 3.3V; enables low dropout voltage (<13mV at 100mA) and minimal power loss. |
| Supply Voltage Range | +1.7V to +5.5V; supports single-cell Li-ion, USB VBUS, and 3.3V/5V system rails without level shifting. |
| Quiescent Current | 170µA (typ) when enabled; critical for battery-powered devices requiring ultra-low standby consumption. |
| Overcurrent Response | Autoretry mode: latches OFF for 524ms after 16.3ms blanking window; prevents latch-up while maintaining system visibility via FLAG. |
| Thermal Protection | Shuts down at +150°C junction temperature with 15°C hysteresis; recovers automatically upon cooling - no manual reset required. |
| Reverse-Current Blocking | Blocks backflow when VOUT > VIN + 110mV (typ); limits reverse leakage to ≤10µA - protects upstream power sources. |
Pinout & Package
MAX4995AAUT+T is housed in a 6-pin SOT23 package (1.6mm × 2.9mm, U6SN+1 outline), RoHS-compliant with lead-free finish. Pin 1 is marked with a dot; exposed pad not present in SOT23 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Switch Output | Drives load; requires 1µF ceramic bypass to GND; connects directly to downstream circuitry (e.g., SDIO card VCC). |
| 2 (GND) | Ground Reference | Primary return path for switch current and internal circuitry; must be low-impedance connection to system ground plane. |
| 3 (SETI) | Current-Limit Programming Input | Analog input accepting resistor-to-GND; sets ILIM per ILIM = 29042/(RSETI + 2.48); capacitance >20pF causes instability. |
| 4 (ON) | Active-High Enable Control | Logic-high (>1.6V) turns switch ON; logic-low (<0.4V) disables output; compatible with 1.8V/3.3V GPIOs. |
| 5 (IN) | Power Input | Accepts +1.7V to +5.5V supply; bypassed with ≥1µF ceramic capacitor to suppress transients during short-circuit events. |
| 6 (FLAG) | Open-Drain Fault Indicator | Pulled low during overcurrent (after blanking), reverse-current, thermal shutdown, or SETI grounded; requires external pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable current limit | 50–600mA range with ±10% accuracy across -40°C to +125°C - eliminates need for multiple fixed-limit parts. |
| Autoretry fault recovery | 16.3ms blanking + 524ms retry cycle reduces average fault power by 97%, preventing thermal runaway in portable designs. |
| Reverse-current blocking | 110mV detection threshold with ≤10µA leakage - safeguards host power rail from backfeeding during hot-swap or battery disconnect. |
| Low quiescent current | 170µA typical supply current in active state - extends battery life in always-on USB/SDIO ports. |
| Integrated thermal shutdown | +150°C trip with 15°C hysteresis and automatic recovery - eliminates need for external thermal sensors or reset circuitry. |
Applications
| SDIO Port Protection | USB Peripheral Power Switching |
|---|---|
|
Use Scenario: Protecting SD card slots in notebooks or tablets from short-circuited cards or ESD-induced latch-up. IC Role / Device Role / Timing Role: Load switch placed between main 3.3V rail and SDIO VCC line; monitors current and asserts FLAG within 5µs of overload. Use Value: Prevents host SoC damage and enables firmware-driven recovery via ON pin toggle, avoiding full system reset. |
Use Scenario: Enabling/disabling power to USB peripherals (e.g., Bluetooth modules, cameras) in smartphones. IC Role / Device Role / Timing Role: Controlled by AP GPIO; provides soft-start-free turn-on (120µs), reverse-current blocking, and fault flagging. Use Value: Eliminates need for discrete FET + sense resistor + comparator solution - saves PCB area and BOM cost. |
| Notebook VGA Port Power Control | GPS Module Hot-Swap Protection |
|
Use Scenario: Isolating VGA port power in ultrabooks to prevent bus contention or inrush damage during docking/undocking. IC Role / Device Role / Timing Role: Acts as intelligent power gate; autoretry mode allows brief shorts (e.g., connector arcing) without latching off. Use Value: Maintains user experience by auto-recovering from transient faults instead of requiring manual reboot or port re-enumeration. |
Use Scenario: Safeguarding GPS receivers in automotive telematics units during ignition cycling or antenna disconnection. IC Role / Device Role / Timing Role: Placed between 3.3V LDO and GPS module; blocks reverse current when module powers up before host MCU. Use Value: Prevents GPS module from back-driving the 3.3V rail and corrupting other peripherals during cold start sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS22965DSGR | Fixed 2A current limit; no programmability; 34mΩ RON; 1.6V–5.5V supply; no reverse-current blocking. | Lacks SETI-based current tuning and reverse-blocking - suitable only where fixed high-current protection suffices. | Select when higher current capacity and lower RON outweigh need for fine-grained fault threshold control. |
| AP22653W5-7 | Adjustable 100mA–2.5A limit; 45mΩ RON; includes soft-start; no thermal shutdown; 2.5V–5.5V supply. | Missing thermal shutdown and reverse-current protection - requires external thermal monitoring in high-power apps. | Choose for cost-sensitive designs needing wide current range and soft-start, but verify thermal margin independently. |
Compared with TPS22965DSGR and AP22653W5-7, the MAX4995AAUT+T uniquely combines precise programmability, reverse-current blocking, and autoretry thermal management in a 6-pin SOT23 footprint - making it optimal for space-constrained, battery-operated SDIO/USB endpoints requiring fail-safe autonomy.
Availability
MAX4995AAUT+T is available at Aetrix Electronics and suitable for SDIO port protection, USB peripheral switching, and notebook VGA power control requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4995AAUT+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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX4995A series was developed specifically for compact, low-power load-switching in portable electronics - emphasizing programmable fault thresholds, minimal quiescent current, and integrated safety features like reverse-current blocking and thermal shutdown.
FAQ
What is the maximum current limit setting for MAX4995AAUT+T?
The MAX4995AAUT+T supports a programmable current limit from 50mA to 600mA using an external resistor on the SETI pin. Setting RSETI below 45.8kΩ yields currents above 600mA, but operation beyond 600mA risks device damage per datasheet absolute maximum ratings. For reliable use, 600mA is the validated upper limit.
Does MAX4995AAUT+T provide reverse-current protection?
Yes, the MAX4995AAUT+T includes integrated reverse-current protection that activates when VOUT exceeds VIN by 110mV (typ). It blocks backflow to ≤10µA and asserts FLAG immediately - without waiting for the blanking timer - ensuring upstream power sources remain isolated during hot-swap or battery disconnect events.
How does the autoretry feature work in MAX4995AAUT+T?
In MAX4995AAUT+T, autoretry initiates after a 16.3ms blanking period during sustained overcurrent. The switch then turns OFF for 524ms (retry time), after which it automatically re-enables. If the fault persists, the cycle repeats; if cleared, normal operation resumes. FLAG remains low throughout the cycle, signaling ongoing fault condition to the host controller.
What package type is used for MAX4995AAUT+T?
The MAX4995AAUT+T uses a 6-pin SOT23 package (outline 21-0058, code U6SN+1), measuring 1.6mm × 2.9mm with gull-wing leads. It is RoHS-compliant and tape-and-reel packaged (indicated by the "T" suffix), optimized for automated assembly in space-constrained portable electronics.
Can MAX4995AAUT+T operate at 1.8V supply voltage?
Yes, the MAX4995AAUT+T operates from +1.7V to +5.5V, making 1.8V fully supported. At 1.8V, the ON pin logic-high threshold remains 1.6V (VIH), ensuring compatibility with 1.8V GPIOs. RON increases slightly (~220mΩ typ), but current-limit accuracy and FLAG functionality remain guaranteed across the full -40°C to +125°C range.
MAX4995AAUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- SOT-6
MAX4995AAUT+T FAQ
1.How can I place an order for MAX4995AAUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4995AAUT+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 MAX4995AAUT+T reliable?
The price and inventory of MAX4995AAUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4995AAUT+T is usually 5 days.
3.What payment methods are accepted for MAX4995AAUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4995AAUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4995AAUT+T?
MAX4995AAUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4995AAUT+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 MAX4995AAUT+T?
For technical support, including MAX4995AAUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4995AAUT+T requirements.
6.How does Aetrix verify that MAX4995AAUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4995AAUT+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 MAX4995AAUT+T meets industry standards.
7.What is the process for return or replacement of MAX4995AAUT+T?
All MAX4995AAUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4995AAUT+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 MAX4995AAUT+T part is unused and in its original packaging.
Return procedure for MAX4995AAUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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