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Analog Devices Inc./Maxim Integrated MAX4995BAVB+T
- Part No.:
- MAX4995BAVB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Current Regulation/Management
- Package:
- 10-UFQFN
- Datasheet:
-
MAX4995BAVB+T.pdf
- Description:
- IC CURRENT SWITCH 10% 10UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,741
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Product details
Overview
MAX4995BAVB+T from Maxim Integrated is a programmable current-limit load switch IC with latch-off fault response, designed for power-path protection in portable and space-constrained systems. It features 130mΩ (typ) on-resistance, 50mA–600mA adjustable current limit, ±10% accuracy, and operates from +1.7V to +5.5V - enabling robust SDIO, USB, and notebook VGA port protection.
For engineers reviewing the MAX4995BAVB+T datasheet, MAX4995BAVB+T pinout, MAX4995BAVB+T application, or MAX4995BAVB+T equivalent, key selection considerations include latch-off behavior (vs. autoretry/continuous), UTQFN-10 package footprint, reverse-current blocking, thermal shutdown at +150°C, and FLAG output assertion at 650mV dropout.
Technical Context
The MAX4995BAVB+T implements a precision analog current-sense amplifier driving an internal N-channel MOSFET, with fixed blanking time (10–22.6ms) before fault latching. Its latch-off response requires explicit reset via ON pin toggle or VIN cycling - unlike autoretry or continuous-limit variants in the same family.
It integrates reverse-current blocking (110mV threshold), thermal shutdown (+150°C, 15°C hysteresis), and open-drain FLAG signaling for overload, reverse voltage, or overtemperature events - all operating across –40°C to +125°C without external components beyond RSETI and bypass capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Range | 50mA to 600mA, set by resistor from SETI to GND; enables precise load protection tuning |
| On-Resistance (RON) | 130mΩ (typ) at VIN = 3.3V; minimizes voltage drop and power loss in high-current paths |
| Supply Voltage Range | +1.7V to +5.5V; supports single-cell Li-ion, USB, and 3.3V/5V system rails |
| Fault Response Mode | Latch-off - disables output until ON pin toggled or VIN cycled; prevents uncontrolled retry cycles |
| FLAG Assertion Threshold | 650mV (VIN – VOUT); triggers early warning before thermal stress or excessive I²R loss |
| Quiescent Current | 170µA (typ); enables low-power standby in battery-operated devices |
| Thermal Shutdown | +150°C junction temperature with 15°C hysteresis; protects against sustained short-circuit damage |
| Reverse-Current Blocking | 110mV (typ) detection threshold; blocks backfeed from OUT to IN, critical for multi-rail isolation |
Pinout & Package
MAX4995BAVB+T is housed in a 10-pin, 1.4mm × 1.8mm UTQFN package with exposed pad (EP) connected to GND for thermal and electrical integrity. Pin pitch is 0.4mm; land pattern follows Maxim outline 21-0028 (V101A1CN+1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10 | IN | Power input; requires ≥1µF ceramic bypass to GND to suppress transients during short-circuit events |
| 2 | FLAG | Open-drain fault indicator; sinks current when overload, reverse voltage, or thermal shutdown occurs |
| 3 | ON | Active-high enable input; must be driven high to activate switch; toggling resets latch-off state |
| 4 | GND | Ground reference for all internal circuits and EP connection point for thermal dissipation |
| 5 | SETI | Current-limit programming node; connects to GND via resistor (e.g., 94.2kΩ → 300mA); capacitance ≤20pF only |
| 6, 9 | N.C. | No-connect pins; not internally bonded; must remain floating or grounded per layout guidelines |
| 7, 8 | OUT | Switched output; requires ≥1µF ceramic bypass to GND; connects to protected load (e.g., SDIO card) |
Key Features
| Feature | Design Value |
|---|---|
| Latch-off fault response | Prevents uncontrolled cycling during persistent faults - eliminates thermal runaway risk in USB/SDIO hot-plug scenarios |
| ±10% current-limit accuracy | Ensures consistent trip point across voltage, temperature, and process variation - critical for reliable system-level fault budgeting |
| Reverse-current blocking | Blocks >10µA backfeed when VOUT > VIN + 110mV - maintains rail isolation in multi-source power architectures |
| 170µA quiescent supply current | Minimizes standby power draw in always-on ports (e.g., GPS, cellular baseband), extending battery life |
| 130mΩ on-resistance (typ) | Reduces conduction loss to <0.4V at 3A - supports high-current loads while meeting thermal limits in UTQFN |
| –40°C to +125°C operation | Validated for automotive cabin, industrial edge, and ruggedized portable applications without derating |
Applications
| SDIO Port Protection | USB 2.0 Power Switching |
|---|---|
Use Scenario: Protecting host controller from short-circuit or overcurrent events during SD card insertion/removal in handheld devices. IC Role / Device Role: Load switch with latch-off response isolates faulty SDIO card, preventing bus collapse and host damage. Use Value: Eliminates need for manual reset or power cycle - system recovers instantly upon user correction and ON pin reassertion. | Use Scenario: Enabling/disabling VBUS power to downstream USB peripherals in notebooks or docking stations. IC Role / Device Role: Programmable current limiter ensures compliance with USB 2.0 500mA max draw while blocking reverse current from peripherals. Use Value: Prevents backfeed into host during peripheral hot-unplug and avoids false overcurrent trips due to cable capacitance. |
| Notebook VGA Port Isolation | GPS Module Power Control |
Use Scenario: Safely powering external VGA monitors via mini-DP or HDMI-to-VGA adapters with legacy analog signal chains. IC Role / Device Role: High-accuracy current switch enforces 300mA limit to prevent adapter-induced overloads on GPU display outputs. Use Value: Maintains stable video output under transient shorts (e.g., bent pins, ESD-damaged cables) without disrupting GPU operation. | Use Scenario: Managing power to standalone GPS receivers in asset trackers or telematics units with intermittent satellite lock. IC Role / Device Role: Low-quiescent, latch-off load switch enables firmware-controlled GPS activation while blocking antenna-induced reverse currents. Use Value: Extends battery runtime in sleep mode and prevents GPS RF front-end damage from antenna coupling during power-down. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limit switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4995AAVB+T | Autoretry fault response instead of latch-off; identical pinout, package, and current range | Suitable where automatic recovery is preferred (e.g., non-critical USB hubs), but risks repeated thermal stress during persistent faults | Select MAX4995AAVB+T only if system firmware cannot manage fault reset - MAX4995BAVB+T offers safer deterministic control. |
| TCK3221B,EL | Fixed 2.1A current limit; no RSETI programming; smaller 1.2mm × 1.2mm WLCSP package | Targeted at high-current, space-constrained applications (e.g., smartphone PMIC rails); lacks FLAG output and reverse-blocking | Choose TCK3221B,EL only for fixed-current, ultra-small-footprint needs - MAX4995BAVB+T provides design flexibility and full fault visibility. |
Compared with MAX4995AAVB+T (autoretry) and TCK3221B,EL (fixed-limit WLCSP), MAX4995BAVB+T uniquely balances programmability, latch-off safety, and comprehensive fault reporting in a thermally optimized UTQFN - making it optimal for host-controlled, mission-critical load switching.
Availability
MAX4995BAVB+T is available at Aetrix Electronics and suitable for SDIO port protection, USB power management, and notebook VGA isolation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4995BAVB+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 MAX4995 family targets compact, high-reliability load-switching in portable electronics - emphasizing programmable protection, minimal external components, and extended temperature operation.
FAQ
What fault response mode does the MAX4995BAVB+T use, and how is it reset?
The MAX4995BAVB+T uses a latch-off fault response: when overcurrent exceeds the programmed limit for longer than the blanking time (10–22.6ms), the switch disables and remains off until explicitly reset. Reset is achieved by toggling the ON pin (high→low→high) or cycling the input supply voltage. This behavior prevents uncontrolled retry cycles that could cause thermal damage - a key distinction from the autoretry mode used in MAX4995AAVB+T.
How do I set the current limit for the MAX4995BAVB+T?
The current limit for MAX4995BAVB+T is set using a resistor (RSETI) connected between the SETI pin and GND. The relationship is defined by ILIM(mA) = 29042 / (RSETI(kΩ) + 2.48). For example, a 94.2kΩ resistor yields ~300mA. RSETI values from 45.8kΩ (602mA) to 576kΩ (50mA) are supported. Capacitance on SETI must not exceed 20pF to avoid instability - confirmed in the MAX4995BAVB+T datasheet Figure 12 and Table 2.
Does the MAX4995BAVB+T provide reverse-current protection, and how does it work?
Yes, the MAX4995BAVB+T provides reverse-current protection. When VOUT exceeds VIN by more than 110mV (typ), the internal circuit blocks backflow to <10µA and asserts FLAG immediately - without waiting for blanking time. The switch re-enables and FLAG deasserts when VOUT falls below the threshold by ~10mV. This feature is critical for isolating powered peripherals (e.g., USB devices) from host rails and is validated across –40°C to +125°C per MAX4995BAVB+T Electrical Characteristics.
What is the purpose of the FLAG output on the MAX4995BAVB+T?
The FLAG output on MAX4995BAVB+T is an open-drain fault indicator that goes low under four conditions: (1) current limiting is active, (2) reverse current is detected (VOUT > VIN + 110mV), (3) thermal shutdown activates (+150°C), or (4) SETI is shorted to GND. It requires an external pullup resistor and enables host microcontrollers to detect and log faults in real time - a core diagnostic capability absent in simpler load switches. FLAG timing and thresholds are fully characterized in the MAX4995BAVB+T datasheet Figures 18 and 20.
Can the MAX4995BAVB+T operate across the full industrial temperature range?
Yes, the MAX4995BAVB+T is fully specified and tested from –40°C to +125°C ambient temperature. All key parameters - including on-resistance (130mΩ typ), current-limit accuracy (±10%), quiescent current (170µA typ), and thermal shutdown (+150°C) - are guaranteed across this range per the Absolute Maximum Ratings and Electrical Characteristics tables. This makes MAX4995BAVB+T suitable for under-hood automotive modules, industrial gateways, and ruggedized portable equipment without derating.
MAX4995BAVB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Switch
- Sensing Method:
- -
- Accuracy:
- ±10%
- Voltage - Input:
- 1.7V ~ 5.5V
- Current - Output:
- Adjustable
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UTQFN (1.4x1.8)
MAX4995BAVB+T FAQ
1.How can I place an order for MAX4995BAVB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4995BAVB+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 MAX4995BAVB+T reliable?
The price and inventory of MAX4995BAVB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4995BAVB+T is usually 5 days.
3.What payment methods are accepted for MAX4995BAVB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4995BAVB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4995BAVB+T?
MAX4995BAVB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4995BAVB+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 MAX4995BAVB+T?
For technical support, including MAX4995BAVB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4995BAVB+T requirements.
6.How does Aetrix verify that MAX4995BAVB+T is sourced from the original manufacturer or authorized distributors?
All MAX4995BAVB+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 MAX4995BAVB+T meets industry standards.
7.What is the process for return or replacement of MAX4995BAVB+T?
All MAX4995BAVB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4995BAVB+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 MAX4995BAVB+T part is unused and in its original packaging.
Return procedure for MAX4995BAVB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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