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Analog Devices Inc./Maxim Integrated MAX4830ELT+T
- Part No.:
- MAX4830ELT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- 6-WFDFN
- Datasheet:
-
MAX4830ELT+T.pdf
- Description:
- IC CURRENT LIMITING 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,841
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Product details
Overview
The MAX4830ELT+T from Maxim Integrated is a latchoff-mode, 50mA forward-current-limited analog power switch with reverse-current protection, 5mA no-load detection (NOLD), and open-drain fault flag (FFLG) outputs. It operates from +2.3V to +5.5V, features 1.4Ω typical on-resistance at +25°C, 14ms guaranteed blanking time, and −40°C to +85°C operation - designed for load-switching in portable battery-powered systems.
For engineers reviewing the MAX4830ELT+T datasheet, MAX4830ELT+T pinout, MAX4830ELT+T application, or MAX4830ELT+T equivalent, key selection criteria include its 50mA current-limit threshold, latchoff (non-autoretry) behavior after overcurrent, 5mA NOLD trip point, thermal shutdown at +150°C, and µDFN-6 (1mm × 1.5mm) package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4830ELT+T implements a fixed-threshold current-limit architecture using internal sense-resistor comparison against dual reference voltages to detect forward- and reverse-current faults. Fault detection triggers after a guaranteed 14ms blanking period, after which the device enters latchoff mode - requiring ON pin toggle or VIN cycling to reset.
It integrates undervoltage lockout (UVLO) with 2.2V rising-edge threshold and 100mV hysteresis, reverse-current limiting up to 120mA, and thermal shutdown at +150°C with 15°C hysteresis. The NOLD output asserts low when load current falls below 5mA, with 60µs assertion delay and immediate deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current Limit | 50mA minimum - ensures consistent overcurrent cutoff across temperature and voltage range |
| No-Load Threshold | 5mA - enables precise detection of disconnected or ultra-low-power loads |
| On-Resistance | 1.4Ω typical at +25°C - limits I²R loss and voltage drop under 50mA load |
| Supply Voltage Range | +2.3V to +5.5V - supports Li-ion, USB, and multi-rail portable power domains |
| Blanking Time | 14ms minimum - suppresses false FFLG assertion during hot-swap transients or startup |
| Operating Temperature | −40°C to +85°C - qualified for industrial and consumer portable environments |
| Quiescent Current | 65µA - minimizes standby power draw in always-on subsystems |
Pinout & Package
Package: 6-pin µDFN (1mm × 1.5mm), RoHS-compliant, bottom-exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | High-side input node; requires 0.1µF ceramic bypass to GND for stability during short-circuit events |
| 2 GND | Ground Reference | Primary return path for load current and internal bias; must be low-impedance connection to system ground plane |
| 3 OUT | Switched Output | Drives load; requires 0.1µF ceramic bypass to GND to suppress turn-off inductive kick |
| 4 FFLG | Open-Drain Fault Flag | Pulled low during forward/reverse overcurrent, thermal shutdown, or UVLO; requires external pullup to IN |
| 5 NOLD | Open-Drain No-Load Flag | Pulled low when load current < 5mA; requires external pullup to ≤ +5.5V supply |
| 6 ON | Active-High Enable | Logic-high (>2.0V) enables switch; logic-low forces shutdown mode (0.01µA IQ) |
Key Features
| Feature | Design Value |
|---|---|
| Latchoff Fault Response | Guarantees non-recurring shutdown after overcurrent - eliminates uncontrolled retry cycles in safety-critical or thermally constrained designs |
| Reverse-Current Protection | 120mA limit prevents backfeed from downstream capacitors or powered peripherals into the source rail |
| 5mA No-Load Detection | Enables firmware-driven port presence sensing without external current-sense resistors or ADC overhead |
| Thermal Shutdown with Hysteresis | +150°C trip with 15°C hysteresis prevents oscillation near thermal limit and allows safe cooldown before recovery |
| Undervoltage Lockout | 2.2V rising-edge threshold with 100mV hysteresis blocks erratic switching during brownout or battery sag conditions |
Applications
| GPS Systems | Cell Phones |
|---|---|
Use Scenario: Power management for GPS receiver modules during intermittent location polling. IC Role / Device Role / Timing Role: Load switch isolating GPS RF section to reduce standby current and prevent backfeed from GPS LNA bias networks. Use Value: 5mA NOLD flag confirms module disconnection; 50mA limit protects host PMIC from antenna-tuned short-circuit faults. | Use Scenario: Controlled power delivery to camera flash LED drivers or SIM card interfaces. IC Role / Device Role / Timing Role: High-side current-limited switch enabling/disabling auxiliary rails with fault visibility via FFLG. Use Value: 14ms blanking avoids false trips during flash capacitor charging transients; latchoff prevents thermal runaway in compact chassis. |
| Digital Still Cameras | MP3 Players |
Use Scenario: Isolation of image sensor interface circuitry during sleep mode. IC Role / Device Role / Timing Role: Power gate for CMOS image sensor's analog front-end, with NOLD confirming sensor removal or cable disconnect. Use Value: 1.4Ω RON minimizes voltage droop during high-current sensor startup; −40°C to +85°C rating supports outdoor use. | Use Scenario: Supply control for audio codec or microSD card slot. IC Role / Device Role / Timing Role: Fault-protected load switch providing clean enable/disable sequencing and real-time current status. Use Value: FFLG alerts host MCU of SD card short-circuit or ESD event; 65µA quiescent current extends battery life between playback sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4826ELT+T | Same latchoff mode, 50mA limit, but 10mA NOLD threshold and 0.7Ω RON | Less sensitive no-load detection; better for higher-load portable peripherals where 10mA idle current is acceptable | Select MAX4826ELT+T if lower on-resistance is prioritized over fine-grained no-load detection |
| MAX4830EVKIT# | Evaluation kit with onboard test points, jumper-configurable load, and FFLG/NOLD monitoring LEDs | Not a direct replacement - used for prototyping and validation of MAX4830ELT+T-based designs | Use MAX4830EVKIT# to verify timing, fault response, and layout sensitivity before production deployment |
Compared with MAX4826ELT+T, the MAX4830ELT+T trades lower on-resistance for tighter 5mA no-load detection and higher RON, making it preferable for ultra-low-power presence sensing; compared with MAX4830EVKIT#, it is the production-grade silicon component requiring board-level integration and external pullups.
Availability
MAX4830ELT+T is available at Aetrix Electronics and suitable for GPS receivers, cellular handsets, digital cameras, and portable audio devices requiring stable component supply, guaranteed current limiting, and compact µDFN packaging.
Supply support for MAX4830ELT+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 MAX4826–MAX4831 product line delivers integrated current-limit switches with configurable fault response modes, targeting space- and power-constrained portable electronics needing robust load protection without external sensing components.
FAQ
What is the guaranteed current-limit threshold for the MAX4830ELT+T?
The MAX4830ELT+T guarantees a forward-current limit of 50mA minimum across its full operating temperature range (−40°C to +85°C) and supply voltage range (+2.3V to +5.5V). This threshold is set by internal precision current-sense circuitry and does not require external components. The device enters latchoff mode if this limit is exceeded for longer than the 14ms blanking time. The MAX4830ELT+T also limits reverse current to 120mA.
Does the MAX4830ELT+T support autoretry functionality?
No, the MAX4830ELT+T uses latchoff-mode fault response, not autoretry. When an overcurrent condition persists beyond the 14ms blanking time, the switch turns off and remains latched off until the ON pin is toggled low-then-high or the input supply voltage is cycled below the UVLO threshold (~2.2V). This behavior is confirmed in the Ordering Information table and Functional Description section of the MAX4830ELT+T datasheet.
What is the no-load detection threshold for the MAX4830ELT+T, and how is it signaled?
The MAX4830ELT+T asserts its NOLD output low when load current falls below 5mA - a tighter threshold than earlier family members like the MAX4826ELT+T (10mA). NOLD is an open-drain output requiring an external pullup resistor to a supply ≤ +5.5V. It features a 60µs assertion delay to reject noise but deasserts immediately when load current rises above threshold. This function is active only when the switch is enabled (ON = high) and no fault is present.
What package type and footprint does the MAX4830ELT+T use?
The MAX4830ELT+T is packaged in a 6-pin µDFN (1mm × 1.5mm) with an exposed thermal pad on the bottom. Its package code is L611+1, outline number 21-0147. The pinout is standardized across the MAX4826–MAX4831 family: IN (1), GND (2), OUT (3), FFLG (4), NOLD (5), ON (6). Land patterns must follow Maxim's recommended footprint for thermal performance and solder reliability.
How does the MAX4830ELT+T handle reverse current flow?
The MAX4830ELT+T actively limits reverse current (from OUT to IN) to 120mA maximum. If reverse current exceeds this threshold for longer than the 14ms blanking time, the device shuts off and pulls FFLG low - identical to forward overcurrent response. Reverse-current protection prevents backfeed from downstream capacitors or externally powered loads into the source rail, enhancing system-level robustness in multi-rail architectures.
MAX4830ELT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- 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:
- 6-µDFN (1.5x1)
MAX4830ELT+T FAQ
1.How can I place an order for MAX4830ELT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4830ELT+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 MAX4830ELT+T reliable?
The price and inventory of MAX4830ELT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4830ELT+T is usually 5 days.
3.What payment methods are accepted for MAX4830ELT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4830ELT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4830ELT+T?
MAX4830ELT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4830ELT+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 MAX4830ELT+T?
For technical support, including MAX4830ELT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4830ELT+T requirements.
6.How does Aetrix verify that MAX4830ELT+T is sourced from the original manufacturer or authorized distributors?
All MAX4830ELT+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 MAX4830ELT+T meets industry standards.
7.What is the process for return or replacement of MAX4830ELT+T?
All MAX4830ELT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4830ELT+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 MAX4830ELT+T part is unused and in its original packaging.
Return procedure for MAX4830ELT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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