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Analog Devices Inc./Maxim Integrated MAX20315EWC+T
- Part No.:
- MAX20315EWC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- 12-WFBGA, WLBGA
- Datasheet:
-
MAX20315EWC+T.pdf
- Description:
- IC CURRENT SWITCH 5% 12WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
The MAX20315EWC+T from Maxim Integrated is a programmable current-limit switch with active-low enable control, continuous current-limit fault response, 10mΩ typical on-resistance, 2.5V–5.5V input range, and adjustable 500mA–6A current limit. It operates in portable RF power amplifier supply paths, USB port power switching, and SDXC card protection circuits.
For engineers reviewing the MAX20315EWC+T datasheet, MAX20315EWC+T pinout, MAX20315EWC+T application, or MAX20315EWC+T equivalent, this page delivers verified electrical parameters, WLP package layout, thermal shutdown behavior, reverse-current blocking timing, and real-world load-switching design implications - all specific to the MAX20315EWC+T variant.
Technical Context
The MAX20315EWC+T implements a BiCMOS-based current-sense architecture with SETI-pin resistor programming, fixed 12–18ms blanking time, and open-drain FLAG output asserting on overcurrent (after blanking), reverse-current detection, or thermal shutdown. Its continuous current-limit mode sustains regulated output current during overload without latching off.
It features dual reverse-current protection thresholds: accurate blocking triggers at 1–25mV (VOUT–VIN) with 128µs debounce, and fast blocking at 40–110mV with 3µs response. Thermal self-limitation activates at +130°C (typ), reducing average current before full thermal shutdown at +150°C (typ) with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.5V to +5.5V - supports single-cell Li-ion, USB 2.0/3.0, and 3.3V/5V system rails without external regulation. |
| Adjustable Current Limit | 500mA to 6A - set via external SETI-to-GND resistor; ±5% accuracy for 2A–6A range ensures precise load protection. |
| On-Resistance (RON) | 10mΩ (typ) - minimizes voltage drop and power loss (e.g., <60mV drop at 6A), critical for high-current portable loads. |
| Thermal Shutdown Threshold | +150°C (typ) with +20°C hysteresis - prevents permanent damage; device auto-restarts after die cools below +130°C. |
| Reverse Current Blocking | Triggers at VOUT–VIN ≥1mV (accurate mode) or ≥40mV (fast mode); blocks within 128µs or 3µs - protects source from backfeed during hot-swap or battery switchover. |
| Enable Polarity | Active-low EN - compatible with low-voltage GPIOs asserting logic '0' to activate switch; matches common PMIC sequencing requirements. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and mobile end-equipment environments including smartphones and UTCA platforms. |
Pinout & Package
The MAX20315EWC+T uses a 12-bump wafer-level package (WLP), 1.68mm × 1.48mm, 0.4mm pitch, with bumps on bottom. Thermal resistance θJA = 72.82°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | FLAG | Open-drain fault indicator - pulls low on overcurrent (post-blanking), reverse-current event, or thermal shutdown; requires external pullup. |
| A2 | SETI | Current-limit programming input - connect resistor to GND to set 500mA–6A limit; unconnected yields uncontrolled <100mA limit. |
| A3 | GND | Power ground reference - must be low-impedance connection; shared return path for IN, OUT, SETI, and FLAG pullup. |
| A4 | EN | Active-low enable - drive low to turn ON switch; high disables output; no internal pullup - external control required. |
| B1, B4, C1, C4 | IN | Power input terminal - connect to source rail; bypass with ≥1µF ceramic capacitor placed ≤5mm away to suppress transients. |
| B2, B3, C2, C3 | OUT | Switched output terminal - connects to load; bypass with ≥1µF ceramic capacitor near device to stabilize voltage during load steps. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous current-limit mode | Sustains regulated output current during overload instead of latching off - enables automatic recovery when fault clears, ideal for transient-heavy RF PA bias rails. |
| Accurate reverse-current blocking | Detects VOUT–VIN ≥1mV and blocks within 128µs - prevents backfeed from partially charged batteries or auxiliary supplies into main rail during hot-plug events. |
| Thermal self-limitation | Reduces average current automatically when die reaches +130°C - maintains safe operation without shutdown under sustained high-power dissipation on thermally constrained PCBs. |
| Programmable blanking time | Fixed 12–18ms window before FLAG assertion - ignores benign inrush currents (e.g., large load capacitors), preventing false fault trips during power-up. |
| Current monitoring via SETI | Voltage at SETI pin linearly tracks output current (VSETI = IOUT × P + C); enables real-time load diagnostics without adding sense resistors or amplifiers. |
Applications
| RF Power Amplifier Bias Supply | USB Type-A Port Power Switching |
|---|---|
|
Use Scenario: Supplies bias voltage to LTE/5G power amplifiers during transmit bursts, where rapid load current surges occur. IC Role / Device Role / Timing Role: High-side current-limit switch with continuous fault response and fast (<3µs) reverse blocking - isolates PA from VBAT during antenna tuning or mismatch events. Use Value: Prevents VBAT droop and source contamination during PA load transients; 10mΩ RON ensures <30mV drop at 3A, preserving amplifier efficiency. |
Use Scenario: Enables/disables +5V power to downstream USB peripherals while protecting host controller from short-circuited cables or faulty devices. IC Role / Device Role / Timing Role: Programmable load switch with ±5% current-limit accuracy and 12ms blanking - tolerates USB enumeration inrush without false tripping. Use Value: Adjustable 500mA–6A limit accommodates USB 2.0 (500mA) and USB 3.0 (900mA) specs; reverse blocking prevents backfeed from bus-powered hubs. |
| SDXC Card Power Protection | UTCA/ATCA Shelf Management Power Control |
|
Use Scenario: Controls 3.3V supply to SDXC memory cards during insertion/ejection, guarding against hot-swap faults and ESD-induced shorts. IC Role / Device Role / Timing Role: Low-RON current limiter with thermal shutdown and FLAG reporting - provides visible fault indication to baseband processor during card initialization. Use Value: 6A capability handles worst-case SDXC peak loads; 1.68mm × 1.48mm WLP fits tight space behind card slot; -40°C to +85°C rating ensures field reliability. |
Use Scenario: Manages 12V or 3.3V power domains for blade servers in telecom chassis, coordinating with shelf manager via FLAG and EN signals. IC Role / Device Role / Timing Role: Industrial-grade current-limit switch with latchoff-free continuous mode and thermal self-regulation - supports hot-swap compliance without manual reset. Use Value: Continuous current limiting avoids system reboot on transient overloads; FLAG output feeds directly into IPMI fault logging; WLP package reduces footprint vs. QFN alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20313EWC+T | Same WLP package and 12-bump layout; active-high EN instead of active-low; identical continuous current-limit behavior and RON. | Requires high-asserted enable signal - better suited for systems with active-high PMIC outputs or GPIOs lacking open-drain capability. | Select when existing control logic drives EN high to enable; pin-compatible but EN polarity differs - verify level-shifting or inverter needs. |
| TCK12AG,TL | 12V-rated, 2.7A max current limit, 20mΩ RON, SOT-23-6 package; no SETI programming - fixed 2.7A limit; includes soft-start. | Lacks programmability and reverse-current blocking; rated for higher input voltage but lower current and less precision. | Choose for cost-sensitive 12V industrial loads where 2.7A fixed limit suffices and soft-start is preferred over adjustable foldback. |
Compared with MAX20315EWC+T, MAX20313EWC+T offers identical protection and thermal behavior but requires active-high enable signaling, while TCK12AG,TL trades programmability and reverse blocking for higher voltage rating and integrated soft-start in a larger, non-WLP package.
Availability
The MAX20315EWC+T is available at Aetrix Electronics and suitable for RF power amplifier biasing, USB port power management, and SDXC card protection requiring stable component supply across industrial temperature ranges and high-volume portable production.
Supply support for MAX20315EWC+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 communications applications.
The MAX20313–MAX20316 family targets high-reliability load-switching in space-constrained mobile and infrastructure equipment, emphasizing programmable protection, thermal resilience, and minimal board area via WLP packaging.
FAQ
What is the enable polarity configuration of the MAX20315EWC+T?
The MAX20315EWC+T features an active-low enable (EN) input: driving EN low turns the switch ON, while driving EN high disables the output. This matches common power-sequencing controllers that assert low-enable signals. Unlike the MAX20313EWC+T (active-high), no external inverter is needed if the host system provides active-low control - a key differentiator confirmed in the Ordering Information table.
How does the MAX20315EWC+T respond during an overcurrent event?
The MAX20315EWC+T enters continuous current-limit mode during overcurrent: it regulates output current at the programmed ILIM value (e.g., 3A) rather than latching off. FLAG asserts after the 12–18ms blanking time if VIN–VOUT exceeds 70mV. Recovery is automatic once load current falls below the folded-back limit - no EN toggle or power cycle required, unlike the latchoff-mode MAX20314/MAX20316 variants.
What is the minimum and maximum current limit range supported by the MAX20315EWC+T?
The MAX20315EWC+T supports a programmable forward current limit from 500mA to 6A, set by an external resistor (RSETI) between SETI and GND. Table 2 in the datasheet confirms 680Ω yields 6.0A (typ), and 8350Ω yields 0.5A (typ). Accuracy is ±5% for limits between 2A and 6A; values below 2A are not specified to that tolerance.
Does the MAX20315EWC+T provide reverse-current protection, and how fast does it respond?
Yes, the MAX20315EWC+T provides dual-mode reverse-current protection: accurate blocking triggers at VOUT–VIN ≥1mV with 128µs debounce, and fast blocking activates at ≥40mV with 3µs response. Both modes disable the FET and assert FLAG. This prevents backfeed from auxiliary supplies or charged capacitors into the main rail - critical for USB OTG and battery-backed systems.
What package type and thermal characteristics apply to the MAX20315EWC+T?
The MAX20315EWC+T uses a 12-bump wafer-level package (WLP), 1.68mm × 1.48mm, 0.4mm pitch, with θJA = 72.82°C/W on a four-layer board. Its junction-to-ambient thermal resistance enables operation up to +85°C ambient with 1098.4mW max power dissipation at +70°C, derating linearly above that. The compact WLP footprint suits ultra-thin mobile PCBs where QFN or SOIC packages are prohibitive.
MAX20315EWC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Switch
- Sensing Method:
- -
- Accuracy:
- ±5%
- Voltage - Input:
- 2.5V ~ 5.5V
- Current - Output:
- 20mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WLP (1.65x1.45)
MAX20315EWC+T FAQ
1.How can I place an order for MAX20315EWC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20315EWC+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 MAX20315EWC+T reliable?
The price and inventory of MAX20315EWC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20315EWC+T is usually 5 days.
3.What payment methods are accepted for MAX20315EWC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20315EWC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20315EWC+T?
MAX20315EWC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20315EWC+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 MAX20315EWC+T?
For technical support, including MAX20315EWC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20315EWC+T requirements.
6.How does Aetrix verify that MAX20315EWC+T is sourced from the original manufacturer or authorized distributors?
All MAX20315EWC+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 MAX20315EWC+T meets industry standards.
7.What is the process for return or replacement of MAX20315EWC+T?
All MAX20315EWC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20315EWC+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 MAX20315EWC+T part is unused and in its original packaging.
Return procedure for MAX20315EWC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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