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Analog Devices Inc./Maxim Integrated MAX4915AEUK+T
- Part No.:
- MAX4915AEUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4915AEUK+T.pdf
- Description:
- IC CURRENT LIMITING SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,273
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Product details
Overview
MAX4915AEUK+T from Maxim Integrated is a 200mA autoretry current-limit switch in 5-pin SOT23 package, operating from 2.3V to 5.5V with 0.2Ω on-resistance, 14ms fault-blanking time, and open-drain FLAG output. It protects SDIO ports and USB power rails by automatically cycling during overcurrent faults without host intervention.
For engineers reviewing the MAX4915AEUK+T datasheet, MAX4915AEUK+T pinout, MAX4915AEUK+T application, or MAX4915AEUK+T equivalent, this device delivers verified autoretry behavior, reverse-current protection, low 80µA quiescent current, and guaranteed thermal shutdown at +150°C - critical for portable battery-powered load switching.
Technical Context
The MAX4915AEUK+T integrates forward/reverse current sensing using an internal sense resistor, comparing voltage drop against dual reference thresholds to distinguish fault direction. Its autoretry logic initiates a 210ms–900ms retry cycle after 14ms blanking, enabling self-recovery without microcontroller polling.
It features undervoltage lockout (1.75V–2.25V rising threshold), thermal shutdown with 15°C hysteresis, and reverse-current limiting up to 300mA. The open-drain FLAG output requires external pull-up to IN and remains asserted until overload removal - confirmed in Figure 2 and Table 1 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 200mA min forward limit (guaranteed at VOUT = GND); enables safe SDIO/USB load switching without external fusing |
| On-Resistance | 0.2Ω typ at +25°C (0.5Ω max across -40°C to +85°C); minimizes I²R loss and voltage drop in 3.3V systems |
| Blanking Time | 14ms min fault-blanking period; suppresses false FLAG assertion during hot-swap transients and power-up |
| Supply Range | 2.3V to 5.5V operation; supports single-cell Li-ion (3.0–4.2V) and USB 5V rails without level-shifting |
| Quiescent Current | 80µA typ at VIN = 3.3V; reduces standby power in always-on mobile peripherals |
| Shutdown Current | 0.01µA typ (10nA); enables ultra-low-power disable state when ON = low |
| Reverse Current Limit | 300mA min (VOUT − VIN ≥ 0.5V); prevents backfeed from downstream capacitors into source during fault |
Pinout & Package
MAX4915AEUK+T uses a 5-pin SOT23 package (outline U5+2, footprint 21-0057), with exposed pad not electrically connected. Pin 1 = IN, Pin 2 = GND, Pin 3 = ON, Pin 4 = FLAG, Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input power rail connection | Bypass with 0.1µF ceramic capacitor to GND; must be routed short and low-inductance for fast short-circuit response |
| GND | Power and signal reference ground | Common return path for IN, OUT, ON, and FLAG; connects to system ground plane under device |
| ON | Active-high enable control input | Logic-high ≥1.4V turns switch on; logic-low ≤0.4V forces shutdown (0.01µA IQ); no internal pull-up |
| FLAG | Open-drain fault indicator output | Asserts low during thermal shutdown, UVLO, or post-blanking overcurrent; requires external pull-up to IN |
| OUT | Switched output to load | Bypass with 0.1µF ceramic capacitor to GND; maximum capacitive load limited by tBLANK and IFWD |
Key Features
| Feature | Design Value |
|---|---|
| Autoretry Fault Recovery | Self-cycling operation after 14ms blanking and 210–900ms retry delay eliminates need for host firmware reset handling |
| Reverse Current Protection | 300mA reverse limit prevents backfeed from charged loads into source rail during fault conditions |
| Low Shutdown Reverse Leakage | 0.01µA max reverse shutdown current (VON = 0, VOUT = +5.5V, VIN = +2.3V) preserves source battery life |
| Fast Current-Limit Response | 5µs detection time ensures immediate action against short circuits before damage occurs |
| Thermal Shutdown with Hysteresis | +150°C trip point with 15°C hysteresis prevents oscillation during thermal stress and enables safe cooldown recovery |
Applications
| SDIO Card Power Switching | USB Peripheral Port Protection |
|---|---|
|
Use Scenario: Powering SDIO-based Wi-Fi or Bluetooth modules in smartphones during hot-insertion. IC Role / Device Role / Timing Role: Load switch with autoretry that isolates faulty SDIO cards while maintaining host communication via FLAG status. Use Value: Prevents system reset during card insertion faults and enables automatic recovery without CPU intervention. |
Use Scenario: Providing overcurrent-protected 5V power to USB OTG peripherals in tablets. IC Role / Device Role / Timing Role: Current-limited power gate with 14ms blanking to tolerate USB enumeration surges and 300mA reverse limit to block backfeed. Use Value: Eliminates need for discrete polyfuses and reduces BOM count while meeting USB power delivery robustness requirements. |
| Notebook ExpressCard Slot | GPS Receiver Power Management |
|
Use Scenario: Controlling power to ExpressCard expansion slots with hot-plug capability. IC Role / Device Role / Timing Role: Autoretry-enabled switch that asserts FLAG only after sustained overload, avoiding false triggers during card insertion transients. Use Value: Enables reliable hot-plug operation in industrial notebooks where mechanical wear increases contact bounce risk. |
Use Scenario: Supplying regulated 3.3V to GPS RF front-end modules with high capacitive startup load. IC Role / Device Role / Timing Role: Low-RON (0.2Ω) switch with 14ms blanking to absorb antenna matching network inrush without latching off. Use Value: Ensures GPS module powers up cleanly even with 10µF+ output capacitance, verified per COUT formula in datasheet. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4915AELT+T | Same 200mA autoretry function but in 6-pin µDFN (2mm × 2mm); no N.C. pin; higher thermal dissipation (358mW vs. 571mW) | Preferred for space-constrained PCBs requiring better thermal performance; incompatible pinout with SOT23 layout | Select when board area allows µDFN and junction temperature margin is critical under continuous short-circuit duty. |
| TPS22965DSGR | 2.7V–5.5V, 2A limit, no autoretry (latchoff only), 45mΩ RON, integrated 1.2ms blanking, no reverse current limit | Suitable for higher-current USB-C PD sink paths but lacks reverse protection and autoretry - requires host-level fault management | Choose only if higher current capacity is mandatory and reverse-current blocking and autonomous recovery are handled elsewhere in system design. |
Compared with MAX4915AEUK+T, the MAX4915AELT+T offers identical electrical behavior in a thermally superior package but demands PCB redesign, while the TPS22965DSGR trades autoretry and reverse protection for higher current rating and simpler fault signaling - making MAX4915AEUK+T optimal for compact, self-healing 200mA SDIO/USB applications.
Availability
MAX4915AEUK+T is available at Aetrix Electronics and suitable for SDIO card interfaces, USB peripheral ports, ExpressCard slots, and GPS receiver power management requiring stable component supply across consumer and industrial production cycles.
Supply support for MAX4915AEUK+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 portable applications.
The MAX4915AEUK+T belongs to the MAX4914B/MAX4915A/B/MAX4917A/B family of current-limit switches engineered specifically for robust, low-power load switching in handheld and battery-operated devices.
FAQ
What is the guaranteed current-limit threshold for MAX4915AEUK+T?
The MAX4915AEUK+T guarantees a minimum forward current limit of 200mA when VOUT = GND, with typical value of 300mA. This is specified in the Electrical Characteristics table under "Forward Current Limit" and applies across the full -40°C to +85°C temperature range. The device also guarantees 300mA reverse current limit when VOUT − VIN ≥ 0.5V.
Does MAX4915AEUK+T support reverse-current protection?
Yes, MAX4915AEUK+T provides reverse-current protection with a guaranteed 300mA limit when VOUT exceeds VIN by ≥0.5V. If reverse current persists beyond the 14ms blanking time, the switch opens and FLAG asserts. During shutdown (ON = low), reverse leakage is limited to 0.01µA max - confirmed in the Electrical Characteristics table under "Reverse Shutdown Current".
How does the autoretry feature work in MAX4915AEUK+T?
In MAX4915AEUK+T, after the 14ms blanking time expires during an overcurrent event, the switch turns off and enters a retry phase lasting 210ms–900ms. At the end of retry, it automatically turns on again. If the overload remains, it repeats the cycle; if cleared, it stays on. This behavior is exclusive to the "A" suffix variants and is documented in Figure 2 and the Autoretry section of the datasheet.
What is the recommended external pull-up for the FLAG pin of MAX4915AEUK+T?
The FLAG pin of MAX4915AEUK+T is open-drain and requires an external pull-up resistor to IN. A 10kΩ resistor is commonly used, ensuring sufficient drive strength while minimizing quiescent current. The datasheet specifies FLAG sinks ≥1mA when asserted low, and FLAG leakage is ≤1µA when high - allowing standard pull-up values without compromising noise immunity or power budget.
Can MAX4915AEUK+T operate from a 2.5V supply?
Yes, MAX4915AEUK+T operates from 2.3V to 5.5V, so 2.5V is fully supported. At VIN = 2.5V, the ON input logic-high threshold is 1.4V (min), and undervoltage lockout releases above 1.75V (rising edge). Quiescent current remains 80µA typ, and on-resistance increases modestly - all parameters are guaranteed across the full voltage and temperature range per the datasheet's Absolute Maximum and Electrical Characteristics tables.
MAX4915AEUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Limiting
- Sensing Method:
- -
- Accuracy:
- -
- Voltage - Input:
- 2.3V ~ 5.5V
- Current - Output:
- 200mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4915AEUK+T FAQ
1.How can I place an order for MAX4915AEUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4915AEUK+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 MAX4915AEUK+T reliable?
The price and inventory of MAX4915AEUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4915AEUK+T is usually 5 days.
3.What payment methods are accepted for MAX4915AEUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4915AEUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4915AEUK+T?
MAX4915AEUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4915AEUK+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 MAX4915AEUK+T?
For technical support, including MAX4915AEUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4915AEUK+T requirements.
6.How does Aetrix verify that MAX4915AEUK+T is sourced from the original manufacturer or authorized distributors?
All MAX4915AEUK+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 MAX4915AEUK+T meets industry standards.
7.What is the process for return or replacement of MAX4915AEUK+T?
All MAX4915AEUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4915AEUK+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 MAX4915AEUK+T part is unused and in its original packaging.
Return procedure for MAX4915AEUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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