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Analog Devices Inc./Maxim Integrated MAX4786EXS+T
- Part No.:
- MAX4786EXS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX4786EXS+T.pdf
- Description:
- IC CURRENT LIMITING SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,993
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Product details
Overview
MAX4786EXS+T from Maxim Integrated is a 50mA forward/reverse current-limiting load switch in a 4-pin SC70 package, featuring autoretry fault recovery, 0.7Ω on-resistance, 2.3V–5.5V supply range, and 14ms guaranteed blanking time-designed for protecting host power rails in portable USB-peripheral interfaces.
For engineers reviewing the MAX4786EXS+T datasheet, MAX4786EXS+T pinout, MAX4786EXS+T application, or MAX4786EXS+T equivalent, this page delivers verified electrical behavior, autoretry timing (98ms retry), reverse-current protection (120mA), thermal shutdown (+150°C), and SC70-4 terminal mapping to support rapid integration into space-constrained battery-powered systems.
Technical Context
The MAX4786EXS+T implements dual-direction current sensing using internal sense resistors and reference comparators to detect both forward (IN→OUT) and reverse (OUT→IN) overcurrent faults. Its autoretry architecture cycles between 14ms blanking-on and 98ms off-retry intervals until fault clearance-eliminating manual reset requirements.
It integrates undervoltage lockout (2.2V rising threshold), thermal shutdown with 15°C hysteresis, reverse-current protection, and fast current-limit response (<5µs). Unlike latch-off variants (e.g., MAX4785), it does not assert FLAG during faults and lacks an open-drain fault indicator pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit (Forward) | 50mA minimum - guarantees safe power delivery to low-power peripherals without external current-sense circuitry. |
| On-Resistance | 0.7Ω typical at 3.3V - minimizes voltage drop and power loss across IN–OUT path under full load. |
| Blanking Time | 14ms minimum - suppresses false trips during hot-swap transients or capacitive load charging. |
| Retry Time | 98ms typical - defines off-interval duration before autoretry re-enables switch after fault detection. |
| Supply Voltage Range | 2.3V to 5.5V - supports direct integration with Li-ion, USB, and 3.3V/5V system rails without level-shifting. |
| Quiescent Current | 65µA typical at 3.3V - enables ultra-low standby power in always-on subsystems. |
| Shutdown Current | 0.01µA - reduces system leakage when ON pin is driven low, critical for battery longevity. |
Pinout & Package
Package: 4-pin SC70 (2.0mm × 2.1mm, 0.65mm pitch), surface-mount, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Switch Output | Connects to protected load; requires 0.1µF ceramic bypass to GND to suppress turn-off inductive kick. |
| 2 (GND) | Ground Reference | Primary return path for load current and internal bias; must be low-impedance connection to system ground plane. |
| 3 (ON) | Active-High Enable | Logic high (>2.0V) enables switch; logic low (<0.8V) forces shutdown mode with 0.01µA supply current. |
| 4 (IN) | Power Input | Accepts 2.3V–5.5V supply; requires 0.1µF ceramic capacitor to GND near pin to stabilize input during short-circuit events. |
Key Features
| Feature | Design Value |
|---|---|
| Autoretry Fault Recovery | Automatically re-enables switch after 98ms off-interval if overload clears-no microcontroller intervention required. |
| Reverse-Current Protection | Blocks >120mA reverse current (OUT→IN), preventing backfeed into powered-down upstream rails. |
| Thermal Shutdown | Disables switch immediately at +150°C junction temperature, with 15°C hysteresis to prevent oscillation. |
| Undervoltage Lockout | Disables switching below 2.2V VIN to avoid erratic behavior during brown-out or startup ramp-up. |
| Low On-Resistance Drift | RON remains ≤1.3Ω across -40°C to +85°C - ensures consistent voltage regulation across temperature. |
Applications
| USB Peripheral Power Switching | Smartphone Camera Module Control |
|---|---|
|
Use Scenario: Isolating USB-connected accessories (e.g., OTG adapters, card readers) from main SoC rail during insertion/removal. IC Role / Device Role / Timing Role: Load switch enforcing 50mA current limit and 14ms blanking to absorb hot-swap inrush without triggering host overcurrent protection. Use Value: Prevents system reset or port disable due to transient overcurrent, enabling robust plug-and-play operation. |
Use Scenario: Enabling/disabling camera modules with large sensor capacitance and flash LED drivers in mobile handsets. IC Role / Device Role / Timing Role: Current-limited power gate with autoretry that tolerates momentary short-circuit faults during lens actuator startup. Use Value: Eliminates need for manual fault reset in field-deployed devices, improving user experience and field reliability. |
| Portable GPS Receiver Power Management | Wearable Health Sensor Subsystem |
|
Use Scenario: Controlling power to GPS RF front-end and baseband ICs in handheld navigation units operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Low-RON (0.7Ω), low-IQ (65µA) switch providing stable 3.3V rail with reverse-current blocking to preserve battery charge during sleep mode. Use Value: Extends battery runtime by minimizing quiescent loss while ensuring fault resilience against antenna coupling-induced surges. |
Use Scenario: Managing power to ECG/PPG sensor analog front-ends in compact wearable patches with strict size and leakage budgets. IC Role / Device Role / Timing Role: SC70-4 footprint switch delivering precise 50mA current limiting and <0.01µA shutdown current to meet ISO 13485 leakage targets. Use Value: Enables certified medical-grade power sequencing without adding discrete FETs or external current-sense amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4785EXS+T | Latch-off behavior (no autoretry); includes FLAG output; 50mA limit; same SC70-4 package. | Requires ON pin toggle or power cycle to recover from overcurrent; suited for systems with fault logging via FLAG. | Select when fault visibility and deterministic manual reset are prioritized over autonomous recovery. |
| MAX4788EXS+T | 100mA forward current limit; identical autoretry timing and pinout; same SC70-4 package. | Supports higher-power peripherals (e.g., Bluetooth radios, larger sensors); shares identical control interface and layout. | Select when load current exceeds 50mA but autoretry functionality and footprint compatibility are retained. |
Compared with MAX4785EXS+T, the MAX4786EXS+T eliminates FLAG overhead and enables hands-free fault recovery-ideal for unattended embedded nodes. Against MAX4788EXS+T, it trades current capacity for tighter control of low-power peripherals where 50mA suffices and margin matters.
Availability
MAX4786EXS+T is available at Aetrix Electronics and suitable for USB peripheral isolation, smartphone camera module control, portable GPS receiver power management, and wearable health sensor subsystems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX4786EXS+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 consumer applications.
The MAX4785–MAX4788 family was developed specifically for intelligent load switching in space-constrained portable electronics-emphasizing fault resilience, ultra-low quiescent power, and seamless integration with 2.3V–5.5V battery and USB power domains.
FAQ
What is the current-limit threshold of the MAX4786EXS+T?
The MAX4786EXS+T guarantees a forward current-limit threshold of 50mA minimum and a reverse current-limit threshold of 120mA minimum. These values are specified across the full operating temperature range (-40°C to +85°C) and ensure reliable protection against sustained overloads without requiring external sensing components. The MAX4786EXS+T does not include a FLAG output, distinguishing it from latch-off variants like the MAX4785EXS+T.
Does the MAX4786EXS+T have a fault indicator pin like FLAG?
No, the MAX4786EXS+T does not feature a FLAG output pin. Unlike the MAX4785EXS+T or MAX4787EXS+T, which provide an open-drain latched fault signal, the MAX4786EXS+T relies solely on autoretry behavior for fault handling. Its 4-pin SC70 configuration (IN, OUT, ON, GND) omits FLAG entirely-reducing board area and simplifying routing where fault reporting is handled externally or deemed unnecessary.
What is the blanking time and retry time for the MAX4786EXS+T?
The MAX4786EXS+T features a guaranteed minimum blanking time of 14ms and a typical retry time of 98ms. During blanking, the switch remains on to tolerate transient inrush; if overload persists beyond blanking, it turns off for the retry interval, then automatically attempts re-enabling. This autoretry cycle repeats until the fault clears-enabling self-recovery without firmware involvement. The MAX4786EXS+T implements this behavior natively and does not require external timing components.
Can the MAX4786EXS+T be used with a 1.8V supply?
No, the MAX4786EXS+T requires a minimum supply voltage of 2.3V and incorporates undervoltage lockout (UVLO) that disables switching below ~2.2V. At 1.8V, the device remains in shutdown state with ON pin ineffective, and no current flows from IN to OUT. For 1.8V-compatible load switches, consider alternatives such as the MAX16922 or MAX20303, as the MAX4786EXS+T is not rated for operation below its specified 2.3V lower limit.
How does reverse-current protection work in the MAX4786EXS+T?
The MAX4786EXS+T actively monitors reverse current (flow from OUT to IN) and limits it to 120mA minimum. If reverse current exceeds this threshold for longer than the 14ms blanking period, the internal switch opens to block further conduction-preventing backfeed into powered-down upstream supplies. This function operates independently of forward current limiting and requires no external components. Unlike forward faults, reverse faults do not trigger autoretry; the switch remains off until ON is cycled.
MAX4786EXS+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Limiting
- Sensing Method:
- -
- Accuracy:
- -
- Voltage - Input:
- 2.3V ~ 5.5V
- Current - Output:
- 50mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX4786EXS+T FAQ
1.How can I place an order for MAX4786EXS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4786EXS+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 MAX4786EXS+T reliable?
The price and inventory of MAX4786EXS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4786EXS+T is usually 5 days.
3.What payment methods are accepted for MAX4786EXS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4786EXS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4786EXS+T?
MAX4786EXS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4786EXS+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 MAX4786EXS+T?
For technical support, including MAX4786EXS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4786EXS+T requirements.
6.How does Aetrix verify that MAX4786EXS+T is sourced from the original manufacturer or authorized distributors?
All MAX4786EXS+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 MAX4786EXS+T meets industry standards.
7.What is the process for return or replacement of MAX4786EXS+T?
All MAX4786EXS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4786EXS+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 MAX4786EXS+T part is unused and in its original packaging.
Return procedure for MAX4786EXS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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