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Analog Devices Inc./Maxim Integrated MAX4787EXS+T
- Part No.:
- MAX4787EXS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX4787EXS+T.pdf
- Description:
- IC CURRENT LIMITING SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,748
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Product details
Overview
MAX4787EXS+T from Maxim Integrated is a 100mA forward/reverse current-limiting load switch in a 4-pin SC70 package, featuring 0.7Ω on-resistance, 2.3V–5.5V supply range, and latch-off fault response with FLAG output. It protects host systems during faulty load conditions in portable power rails.
For engineers reviewing the MAX4787EXS+T datasheet, MAX4787EXS+T pinout, MAX4787EXS+T application, or MAX4787EXS+T equivalent, key selection criteria include guaranteed 100mA current limit, 14ms blanking time, thermal shutdown at +150°C, reverse-current protection, and latch-off behavior requiring ON pin reset after overcurrent faults.
Technical Context
The MAX4787EXS+T implements dual-direction current sensing using internal sense resistors and reference comparators to detect both forward (IN→OUT) and reverse (OUT→IN) overcurrent events. Fault detection triggers after a guaranteed 14ms blanking period, eliminating false trips from capacitive load transients.
Upon fault confirmation, it enters latch-off mode-disabling the switch and asserting open-drain FLAG low-requiring active reset via ON pin toggle or VIN cycling. It includes undervoltage lockout (2.2V rising threshold), thermal shutdown (+150°C), and reverse-current protection up to 240mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 100mA forward / 240mA reverse - ensures safe power delivery to sensitive loads without damaging host circuitry |
| On-Resistance | 0.7Ω typical at 3.3V - minimizes voltage drop and power loss in low-voltage portable rails |
| Supply Range | 2.3V to 5.5V - supports single-cell Li-ion, USB, and multi-rail embedded systems |
| Blanking Time | 14ms minimum - suppresses false fault assertions during hot-swap or capacitor charging transients |
| Quiescent Current | 65µA typical - enables ultra-low-power standby in battery-operated devices |
| Latch-Off Current | 8µA typical - reduces system power consumption during sustained fault conditions |
| Shutdown Current | 0.01µA - eliminates leakage when disabled, critical for long-term battery life |
| Thermal Shutdown | +150°C with 15°C hysteresis - provides robust self-protection under continuous short-circuit stress |
Pinout & Package
MAX4787EXS+T is housed in a 4-pin SC70 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. The package is RoHS-compliant and moisture-sensitive level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Switch Output | Connects to load; requires 0.1µF ceramic bypass to GND to suppress turn-off inductive kick |
| 2: GND | Ground Reference | Primary return path for switch current and internal circuitry; must be low-impedance |
| 3: FLAG | Fault Indicator Output | Open-drain output asserted low during latch-off; requires external pullup to IN for proper logic level |
| 4: ON | Active-High Enable Input | Drives high to activate switch; toggling low→high resets latch-off state after fault |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 100mA Forward Current Limit | Enables precise, repeatable load protection without derating across temperature and voltage |
| Latched FLAG Output with Blanking | Prevents nuisance interrupts during hot-plug events while providing unambiguous fault status |
| Reverse-Current Protection (240mA) | Blocks backfeed from powered peripherals into main rail, protecting upstream regulators |
| Thermal Shutdown + Hysteresis | Automatically disables switch at +150°C and re-enables only after cooling by ≥15°C, preventing thermal oscillation |
| Undervoltage Lockout (2.2V) | Disables switching below safe operating voltage, avoiding erratic behavior during brownout or startup |
| 0.01µA Shutdown Current | Eliminates standby drain in always-on systems, extending shelf life of sealed battery-powered devices |
Applications
| Smartphone Power Rail Protection | GPS Module Enable Control |
|---|---|
Use Scenario: Isolating GPS receiver module from main PMIC rail during fault or sleep mode. IC Role / Device Role / Timing Role: Load switch controlling 3.3V power delivery with reverse-current blocking and latch-off fault reporting. Use Value: Prevents GPS module backfeed into baseband processor and enables microcontroller-triggered reset via ON pin after overcurrent event. |
Use Scenario: Enabling/disabling camera flash LED driver IC in handheld devices. IC Role / Device Role / Timing Role: Current-limited power gate with 14ms transient immunity during flash capacitor charge cycles. Use Value: Eliminates false fault trips during high di/dt flash activation while maintaining 100mA compliance for LED driver input stage. |
| USB OTG Peripheral Power Management | PDA Memory Card Slot Protection |
Use Scenario: Controlling VBUS power to USB OTG peripheral when device acts as host. IC Role / Device Role / Timing Role: Bidirectional current-limit switch monitoring both forward (host→peripheral) and reverse (peripheral→host) paths. Use Value: Blocks reverse current from powered peripheral into weak OTG VBUS source and latches off to prevent damage during cable short. |
Use Scenario: Power gating SD/MMC card slot in palmtop computers during suspend/resume. IC Role / Device Role / Timing Role: Low-RON load switch with thermal and UVLO protection for hot-pluggable storage interface. Use Value: Ensures reliable card insertion detection without rail collapse, and prevents latch-off during brief card-insertion inrush. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4787EXK+T | Same 100mA current limit and latch-off behavior, but in 5-pin SC70 with dedicated FLAG pin (pin 3) instead of shared pinout | Requires PCB layout change due to extra pin; used where FLAG routing isolation is critical | Select MAX4787EXK+T only if separate FLAG trace routing is required; otherwise MAX4787EXS+T offers identical functionality in smaller footprint |
| MAX4788EXS+T | Same 100mA current limit and 4-pin SC70 package, but features autoretry instead of latch-off; FLAG not implemented | Auto-recovers from transient faults without MCU intervention; unsuitable where persistent fault indication is required | Choose MAX4788EXS+T for self-healing systems; avoid when fault logging or manual reset is mandatory per safety policy |
Compared with MAX4787EXK+T, MAX4787EXS+T saves board area with identical electrical behavior but no dedicated FLAG pin; compared with MAX4788EXS+T, it trades autoretry for deterministic fault hold and explicit flag signaling-critical for diagnostic-aware portable firmware.
Availability
MAX4787EXS+T is available at Aetrix Electronics and suitable for smartphone power rail protection, GPS module enable control, USB OTG peripheral management, and PDA memory card slot protection requiring stable component supply and long-term industrial availability.
Supply support for MAX4787EXS+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 MAX4785–MAX4788 family was engineered specifically for compact, intelligent load switching in battery-powered handheld devices-emphasizing fault resilience, ultra-low quiescent current, and minimal board footprint.
FAQ
What is the guaranteed current-limit threshold for MAX4787EXS+T?
The MAX4787EXS+T guarantees a forward current limit of 100mA (minimum) and a reverse current limit of 240mA (minimum), tested across -40°C to +85°C. These thresholds are enforced by internal sense-resistor comparison circuits and remain stable over voltage and temperature, making MAX4787EXS+T suitable for precise load protection in portable power domains.
Does MAX4787EXS+T support reverse-current protection?
Yes, MAX4787EXS+T actively monitors reverse current (OUT → IN) and shuts off the switch if reverse current exceeds 240mA for longer than the 14ms blanking period. This prevents backfeed from powered peripherals into the main supply rail-a critical feature in USB OTG and multi-rail handheld architectures using MAX4787EXS+T.
How does the FLAG output behave on MAX4787EXS+T during a fault?
During any confirmed fault (forward/reverse overcurrent, thermal shutdown, or UVLO), MAX4787EXS+T asserts its open-drain FLAG pin low and latches it until the ON pin is cycled. FLAG requires an external pullup resistor to IN and remains high-impedance when no fault is present or when ON is low-enabling direct interfacing with 3.3V microcontrollers in systems using MAX4787EXS+T.
What is the recommended reset method after MAX4787EXS+T enters latch-off?
To reset MAX4787EXS+T from latch-off, drive the ON pin low for ≥100ns, then high again-no power cycle is required. This sequence clears the internal fault latch and restores normal switching. The same reset works whether the fault originated from overcurrent, thermal shutdown, or UVLO, ensuring consistent recovery behavior across all failure modes of MAX4787EXS+T.
Can MAX4787EXS+T operate from a 1.8V supply?
No, MAX4787EXS+T requires a minimum supply voltage of 2.3V and incorporates undervoltage lockout (UVLO) that disables switching below ~2.2V. Attempting to operate below 2.3V will result in undefined behavior or automatic shutdown; for 1.8V systems, consider alternative load switches such as the MAX16910 or MAX20303-not MAX4787EXS+T.
MAX4787EXS+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:
- Obsolete
- Function:
- Current Limiting
- Sensing Method:
- -
- Accuracy:
- -
- Voltage - Input:
- 2.3V ~ 5.5V
- Current - Output:
- 100mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX4787EXS+T FAQ
1.How can I place an order for MAX4787EXS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4787EXS+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 MAX4787EXS+T reliable?
The price and inventory of MAX4787EXS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4787EXS+T is usually 5 days.
3.What payment methods are accepted for MAX4787EXS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4787EXS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4787EXS+T?
MAX4787EXS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4787EXS+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 MAX4787EXS+T?
For technical support, including MAX4787EXS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4787EXS+T requirements.
6.How does Aetrix verify that MAX4787EXS+T is sourced from the original manufacturer or authorized distributors?
All MAX4787EXS+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 MAX4787EXS+T meets industry standards.
7.What is the process for return or replacement of MAX4787EXS+T?
All MAX4787EXS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4787EXS+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 MAX4787EXS+T part is unused and in its original packaging.
Return procedure for MAX4787EXS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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