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Analog Devices Inc./Maxim Integrated MAX4980ETA+T
- Part No.:
- MAX4980ETA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Power Supply Controllers, Monitors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX4980ETA+T.pdf
- Description:
- IC OVERVOLTAGE PROT CTRLR 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,257
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Product details
Overview
The MAX4980ETA+T from Maxim Integrated is an overvoltage, undervoltage, overcurrent, and lithium-ion battery overcharge protection IC designed for charger input port protection in portable electronics. It integrates an 85mΩ (typ) nFET switch, 5.7V overvoltage lockout, 2.63V undervoltage lockout, 900mA current limit, and 4.4V battery overvoltage trip level - all in a single 8-pin TDFN package.
For engineers reviewing the MAX4980ETA+T datasheet, MAX4980ETA+T pinout, MAX4980ETA+T application, or MAX4980ETA+T equivalent, this device serves as a system-level fault protector for USB-powered Li-ion charging circuits where input fault tolerance, battery safety, and compact footprint are critical.
Technical Context
The MAX4980ETA+T implements dual-stage protection logic: first, input voltage monitoring (OVLO/UVLO) disables the internal nFET if VIN falls below 2.63V or rises above 5.7V; second, active current limiting with 20ms blanking and 160ms autoretry cycles prevents sustained overcurrent faults. Its charge-pump–driven gate control enables full enhancement of the low-RON FET from low-input-voltage sources.
Unlike earlier family members, the MAX4980ETA+T includes a dedicated BAT pin for direct lithium-ion cell voltage monitoring, triggering FET shutdown when VBAT ≥ 4.4V (typ). The SDT pin is omitted - confirming absence of startup debounce indicator functionality per pin configuration and functional diagram.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 28V - supports wide-input USB adapters and legacy wall chargers while tolerating transient surges up to +28V. |
| Overvoltage Lockout (OVLO) | 5.7V (typ), ±0.1V hysteresis - protects downstream circuitry from overvoltage events without false triggering during nominal 5V USB operation. |
| Undervoltage Lockout (UVLO) | 2.63V (typ), ±0.07V hysteresis - ensures stable FET turn-on only after input stabilizes above minimum Li-ion charger operating threshold. |
| Current Limit Threshold | 900mA (typ), -100/+50mA variation over -40°C to +85°C - provides precise short-circuit protection aligned with standard USB 2.0 power delivery limits. |
| Battery Overvoltage Trip | 4.4V (typ), ±0.1V - matches common Li-ion cell full-charge voltage, preventing overcharge damage when integrated into charger path. |
| Switch On-Resistance | 85mΩ (typ) at +25°C, ≤160mΩ max over full temp range - minimizes conduction loss and thermal rise under 900mA load. |
| Thermal Shutdown | +160°C (typ), 10°C hysteresis - safeguards device integrity during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX4980ETA+T is housed in an 8-pin, 2mm × 3mm TDFN-EP package with exposed pad (EP) connected internally to GND. Thermal performance is optimized by soldering EP to a large ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Supply Input | Powers internal charge pump; requires 1µF ceramic bypass to GND near pin for ±15kV HBM ESD protection and stable startup. |
| 2 - | Not Connected (NC) | No internal connection - pin 2 is unassigned in MAX4980/MAX4981; differs from MAX4978/MAX4979's SDT function. |
| 3,6,7 I.C. | Internally Connected | Must be tied to GND externally; not signal pins - connects to internal substrate reference nodes. |
| 4 EN | Active-Low Enable | Drives internal logic; pull low for normal operation, high to disable FET and reduce supply current to 15µA (typ). |
| 5 GND | Ground Reference | Main signal and power return; must be low-impedance connection shared with EP and bypass capacitors. |
| 8 OUT | Protected Output | Drives downstream charger IC or load; FET source is connected internally to IN, drain to OUT - high-side switch topology. |
| BAT (pin 2 not used; BAT is pin 2 in MAX4980/MAX4981 per Pin Description table) | Battery Monitor Input | Directly monitors Li-ion cell voltage; triggers FET shutdown if VBAT ≥ 4.4V - requires 1µF ceramic bypass to GND for ESD robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 85mΩ nFET Switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and board space in portable charger designs. |
| Triple Fault Protection | Simultaneous detection of overvoltage (5.7V), undervoltage (2.63V), and overcurrent (900mA) - prevents cascading failures in USB-powered systems. |
| Lithium-Ion Battery Overcharge Monitoring | Dedicated BAT pin with 4.4V threshold enables direct cell voltage supervision without external comparator or ADC. |
| Autoretry Current Limiting | 20ms blanking + 160ms retry cycle allows temporary inrush currents (e.g., capacitor charging) while enforcing hard current limit on persistent faults. |
| Charge-Pump Gate Drive | Enables full FET enhancement from inputs as low as 2.3V - ensures reliable turn-on even with drooping USB sources or long cables. |
Applications
| USB-Powered Smartphones | Portable Media Players |
|---|---|
|
Use Scenario: USB wall adapter or PC port supplies 5V to smartphone charging circuit, subject to cable-induced transients and misconnected higher-voltage adapters. IC Role / Device Role / Timing Role: High-side protection switch placed between USB connector and PMIC charger input; responds within 5µs to overvoltage/overcurrent events. Use Value: Prevents permanent damage to charger IC and battery from 12V/24V adapter mismatches and shorted USB cables - validated to withstand +28V faults. |
Use Scenario: MP3 player draws burst current during audio decode and flash write, risking overcurrent on weak USB ports. IC Role / Device Role / Timing Role: Current-limiting switch upstream of DC-DC converter; enforces 900mA ceiling with 20ms blanking to absorb inrush. Use Value: Maintains system uptime during transient overloads while blocking sustained shorts - autoretry avoids latching shutdown during normal operation. |
| Digital Still Cameras | Tablet Charging Circuits |
|
Use Scenario: DSLR or mirrorless camera uses USB-C for fast charging but lacks native overvoltage resilience due to high-voltage sensor and processor rails. IC Role / Device Role / Timing Role: Input protector isolating USB interface from main battery charging path; monitors both VIN and BAT independently. Use Value: Guarantees battery remains disconnected if cell voltage reaches 4.4V, eliminating risk of thermal runaway during overnight charging. |
Use Scenario: Tablet with dual-input charging (USB + proprietary adapter) requires unified protection against polarity reversal, overvoltage, and battery overcharge. IC Role / Device Role / Timing Role: Single-chip solution handling input validation (OVLO/UVLO), current limiting, and battery voltage supervision in one footprint. Use Value: Reduces protection circuit area by >40% vs. discrete FET + comparator + reference solution - critical for slim tablet edge designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage and battery overcharge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4981ETA+T | 1950mA current limit (vs. 900mA); identical OVLO/UVLO/BAT thresholds and pinout. | Targeted at higher-power USB PD or dual-cell charging systems requiring greater current headroom. | Select MAX4981ETA+T when system peak load exceeds 900mA and thermal margin supports higher RON dissipation. |
| TPS259211DRCR | No battery overvoltage monitoring; 5.85V OVLO (fixed), 1.7A current limit, integrated FET, but lacks BAT pin and 4.4V cutoff. | Suitable for general USB port protection without Li-ion cell supervision - requires external battery protection circuitry. | Choose TPS259211DRCR only if battery overcharge protection is handled elsewhere; MAX4980ETA+T is required when BAT monitoring is mandatory. |
Compared with MAX4981ETA+T and TPS259211DRCR, the MAX4980ETA+T uniquely balances 900mA current capability with integrated 4.4V battery overvoltage cutoff in the same 2mm × 3mm footprint - making it optimal for space-constrained single-cell USB-charged devices where battery safety is non-negotiable.
Availability
MAX4980ETA+T is available at Aetrix Electronics and suitable for USB-powered smartphones, portable media players, digital still cameras, and tablet charging circuits requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX4980ETA+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4978–MAX4981 family was engineered specifically for portable device charger input protection - integrating fault detection, current limiting, and battery supervision into minimal-area packages for space- and safety-critical designs.
FAQ
What protection functions does the MAX4980ETA+T provide?
The MAX4980ETA+T provides four coordinated protection functions: overvoltage lockout at 5.7V (typ), undervoltage lockout at 2.63V (typ), overcurrent limiting at 900mA (typ), and lithium-ion battery overcharge protection at 4.4V (typ). All functions act independently to disable the internal 85mΩ nFET switch, ensuring robust fault containment in USB-powered portable systems.
Does the MAX4980ETA+T include a startup debounce timer?
No, the MAX4980ETA+T does not include a startup debounce timer or SDT output. Unlike MAX4978/MAX4979, the MAX4980ETA+T omits pin 2 functionality - confirmed by pin description, functional diagram, and ordering table. Its 160ms startup delay is internal to the charge pump and not signaled externally.
Can the MAX4980ETA+T be used without the BAT pin connection?
Yes, the MAX4980ETA+T operates fully as an overvoltage/overcurrent protector without BAT connection. However, battery overcharge protection is disabled - the FET remains on regardless of cell voltage. To enable 4.4V battery cutoff, BAT must be connected directly to the Li-ion cell terminal with a 1µF ceramic bypass capacitor to GND.
What is the thermal performance of the MAX4980ETA+T in its TDFN package?
The MAX4980ETA+T in its 2mm × 3mm TDFN-EP package has a junction-to-ambient thermal resistance (θJA) of 60°C/W and junction-to-case (θJC) of 10.8°C/W when mounted on a 4-layer board per JEDEC JESD51-7. With EP soldered to a large ground plane, it sustains 900mA continuous current at +85°C ambient without thermal shutdown.
How does the MAX4980ETA+T handle short-circuit faults?
Upon detecting current ≥900mA, the MAX4980ETA+T initiates a 20ms blanking period. If overcurrent persists, the FET turns off for 160ms (autoretry time), then automatically re-enables. This cycle repeats until the fault clears - preventing latch-up while allowing brief inrush currents typical of capacitive loads downstream of the MAX4980ETA+T.
MAX4980ETA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Overvoltage Protection Controller
- Voltage - Input:
- 2.3V ~ 28V
- Voltage - Supply:
- -
- Current - Supply:
- 130 µA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX4980ETA+T FAQ
1.How can I place an order for MAX4980ETA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4980ETA+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 MAX4980ETA+T reliable?
The price and inventory of MAX4980ETA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4980ETA+T is usually 5 days.
3.What payment methods are accepted for MAX4980ETA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4980ETA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4980ETA+T?
MAX4980ETA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4980ETA+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 MAX4980ETA+T?
For technical support, including MAX4980ETA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4980ETA+T requirements.
6.How does Aetrix verify that MAX4980ETA+T is sourced from the original manufacturer or authorized distributors?
All MAX4980ETA+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 MAX4980ETA+T meets industry standards.
7.What is the process for return or replacement of MAX4980ETA+T?
All MAX4980ETA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4980ETA+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 MAX4980ETA+T part is unused and in its original packaging.
Return procedure for MAX4980ETA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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