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Analog Devices Inc./Maxim Integrated MAX16914AUB+
- Part No.:
- MAX16914AUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX16914AUB+.pdf
- Description:
- IC BATT PROTECTION 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
The MAX16914AUB+ from Maxim Integrated is an automotive-grade overvoltage switch-off controller that monitors input voltage and drives two external p-channel MOSFETs to protect downstream circuitry from load dumps up to +44V, reverse-battery events down to -75V, and cold-crank undervoltage conditions. It operates from 4.5V to 19V, delivers 29µA quiescent current at +25°C, and features active-low open-drain OV output for fault indication.
For engineers reviewing the MAX16914AUB+ datasheet, MAX16914AUB+ pinout, MAX16914AUB+ application, or MAX16914AUB+ equivalent, this device serves as a critical front-end protection controller in automotive power distribution modules, battery management systems, and industrial power supplies where robust transient tolerance and ultra-low standby power are mandatory.
Technical Context
The MAX16914AUB+ implements a dedicated overvoltage switch-off architecture: TERM is internally shorted to VCC, enabling direct monitoring of the supply rail (VCC) against a user-programmable threshold set via the SET pin and external resistor divider. When VCC exceeds the programmed threshold, GATE2 is pulled to VCC to rapidly turn off the external P2 MOSFET and isolate the load.
Reverse-battery protection is enforced by differential sensing between SENSE IN and SENSE OUT - the IC turns off GATE1 when VSENSE OUT − VSENSE IN > 25mV (back-charge detection) and blocks GATE1 entirely under negative input bias. Shutdown control (SHDN) disables both gate drivers and reduces total supply current to 6µA while preserving reverse-battery blocking capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 19V - supports full automotive battery range including cold-crank (≥4.5V start) and nominal 12V/24V systems. |
| Overvoltage Threshold | User-programmable via SET/TERM resistor divider - enables precise trip points (e.g., 22V) for load dump survival without fixed internal limits. |
| Quiescent Current | 29µA at +25°C - meets stringent automotive module sleep-mode requirements (e.g., ISO 16750-2 Class D). |
| Shutdown Current | 6µA - ensures minimal battery drain during vehicle off-state while maintaining reverse-battery blocking. |
| Fault Tolerance | +44V transient on VCC/SENSE OUT/OV/SHDN/TERM; −75V on SENSE IN - withstands ISO 7637-2 Pulse 5a load dump and reverse polarity events. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive placement per AEC-Q100 Grade 0. |
| Thermal Protection | 170°C shutdown with 20°C hysteresis - prevents thermal runaway during sustained overvoltage or high-current faults. |
Pinout & Package
MAX16914AUB+ is housed in a 10-pin µMAX® package (U10+2 outline, RoHS-compliant), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. The package supports surface-mount reflow and is rated for automotive temperature cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Bypassed with ≥0.1µF ceramic capacitor; powers internal regulators and gate drivers; monitored for overvoltage detection. |
| GATE1 (Pin 2) | P1 MOSFET gate driver | Drives source-connected pFET for ideal diode/reverse-battery protection; clamped to prevent VGS overstress above 10V VCC. |
| SENSE IN (Pin 3) | Differential sense input (input side) | Monitors battery-side voltage; used with SENSE OUT to detect back-charge (VOUT > VIN) and reverse polarity. |
| SHDN (Pin 4) | Active-low shutdown input | Pulled low to disable GATE2, disconnect input from output, and reduce supply current to 6µA; internally sunk at 0.5µA. |
| OV (Pin 5) | Open-drain overvoltage indicator | Asserts low when VCC exceeds programmed threshold; requires external pullup (e.g., 45kΩ to VCC) for logic-level signaling. |
| GND (Pin 6) | Ground reference | Primary return path for all internal circuits and gate-drive currents; must be low-impedance connection to system ground plane. |
| SET (Pin 7) | Overvoltage threshold programming input | Accepts voltage from resistor divider (TERM–GND); 1.20V rising threshold with 4% hysteresis sets precise trip point. |
| TERM (Pin 8) | Divider termination output | Internally connected to VCC in MAX16914AUB+ - completes resistor divider network for VCC-referenced overvoltage detection. |
| SENSE OUT (Pin 9) | Differential sense input (output side) | Monitors load-side voltage; paired with SENSE IN to enable back-charge prevention and reverse-battery blocking. |
| GATE2 (Pin 10) | P2 MOSFET gate driver | Drives second pFET for overvoltage isolation; pulled to VCC during fault to fully turn off P2 and disconnect load. |
Key Features
| Feature | Design Value |
|---|---|
| Ideal diode replacement | Eliminates series Schottky diode - reduces forward drop from ~0.4V to ILOAD × RDS(ON) of P1 MOSFET, enabling operation during cold-crank (≥4.5V). |
| Reverse-battery protection | Blocks −75V input transients by turning off GATE1; prevents damage to downstream ICs and avoids tank capacitor discharge into source. |
| Programmable overvoltage switch-off | Uses external resistor divider on SET/TERM to set precise trip thresholds (e.g., 22V, 28V) - no trimming or calibration required. |
| Back-charge prevention | Detects VSENSE OUT − VSENSE IN > 25mV with 50mV hysteresis - shuts off GATE1 within 10µs to stop discharge of downstream bulk capacitors. |
| Thermal overload protection | Shuts down both GATE1 and GATE2 at +170°C junction temperature; resumes operation after 20°C cooldown - prevents latch-up during sustained faults. |
Applications
| Automotive Body Control Module (BCM) | Industrial Power Distribution Unit (PDU) |
|---|---|
Use Scenario: Protects microcontroller, CAN transceivers, and sensors from alternator load dumps and battery reversal during vehicle service. IC Role / Device Role / Timing Role: Front-end protection controller that isolates downstream 5V/3.3V rails using external pFETs during +44V transients or −75V reverse polarity. Use Value: Enables use of low-RDS(ON) MOSFETs instead of lossy diodes, preserving >98% efficiency at 5A load and extending cold-crank runtime. |
Use Scenario: Secures programmable logic controllers (PLCs) and I/O modules against field wiring errors and induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Overvoltage switch-off supervisor that disables power delivery within 3µs of detecting >24V fault, preventing damage to 24V-rated FPGA and ADC subsystems. Use Value: Delivers 6µA shutdown current to meet UL 61010-1 standby power limits while maintaining reverse-polarity blocking without auxiliary bias. |
| Automotive Infotainment Head Unit | Off-Highway Vehicle Telematics Gateway |
Use Scenario: Shields display drivers, audio amplifiers, and USB-C PD controllers from battery disconnection transients and jump-start misconnections. IC Role / Device Role / Timing Role: Dual-MOSFET gate controller that enforces <10µs back-charge response and <3µs overvoltage shutdown to protect sensitive analog front-ends. Use Value: Supports seamless hot-swap operation - maintains reverse-battery blocking even during SHDN assertion, eliminating need for secondary protection ICs. |
Use Scenario: Safeguards GPS/GNSS receivers, cellular modems, and GNSS-RTK processors in construction equipment exposed to 24V battery systems with poor regulation. IC Role / Device Role / Timing Role: High-voltage tolerant supervisor that monitors VCC directly and triggers GATE2 cutoff before downstream LDOs exceed absolute maximum ratings. Use Value: Withstands repeated +44V/100ms load dumps per ISO 16750-2 without derating - eliminates need for TVS clamping stages and associated board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage switch-off controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16915AUB+ | TERM internally tied to SENSE OUT instead of VCC - operates as overvoltage limiter (not switch-off); cycles P2 during sustained overvoltage to regulate VOUT. | Suitable for applications requiring regulated output during transients (e.g., camera modules), not full isolation. | Select MAX16915AUB+ only if continuous output regulation under overvoltage is required; MAX16914AUB+ provides cleaner fault isolation. |
| TPS43060RTER | Integrated high-side switch (no external FETs); 3.5V–40V input; 1.2A max; no reverse-battery or back-charge protection. | Limited to lower-current, non-automotive applications where external FET flexibility and −75V tolerance are unnecessary. | Choose TPS43060RTER for compact, low-cost designs under 1A with no reverse-polarity risk; MAX16914AUB+ is required for full automotive fault coverage. |
Compared with MAX16915AUB+, the MAX16914AUB+ provides definitive load isolation during overvoltage rather than regulation - critical for safety-critical modules where downstream power must be cut. Versus TPS43060RTER, it offers scalable current handling via external MOSFETs and comprehensive −75V/+44V fault immunity essential for automotive deployment.
Availability
MAX16914AUB+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial power distribution units, and off-highway telematics gateways requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX16914AUB+ 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 automotive, industrial, and communications markets - emphasizing reliability, integration, and AEC-Q100 qualification.
The MAX16914AUB+ belongs to Maxim's automotive protection controller family, engineered specifically to replace discrete diode-based solutions in 12V/24V systems while meeting ISO 16750-2 and ISO 7637-2 transient immunity standards.
FAQ
What is the primary function of the MAX16914AUB+ in an automotive power system?
The MAX16914AUB+ functions as an overvoltage switch-off controller that monitors the input supply voltage (VCC) and commands external p-channel MOSFETs to disconnect downstream loads during +44V load dumps or other overvoltage faults. It also provides reverse-battery protection down to −75V and prevents back-charge of tank capacitors - all while consuming only 29µA in normal operation. This makes the MAX16914AUB+ ideal for protecting sensitive electronics in automotive body control modules and infotainment systems.
How does the MAX16914AUB+ differ from the MAX16915AUB+?
The MAX16914AUB+ and MAX16915AUB+ share pinout and core protection features but differ fundamentally in overvoltage response: MAX16914AUB+ is a switch-off controller (TERM tied to VCC), turning off GATE2 permanently during overvoltage to isolate the load; MAX16915AUB+ is a limiter (TERM tied to SENSE OUT), cycling GATE2 to regulate output voltage. The MAX16914AUB+ is selected when complete fault isolation is required; MAX16915AUB+ suits applications needing sustained regulated output under transient overvoltage.
Can the MAX16914AUB+ operate during cold-crank conditions?
Yes, the MAX16914AUB+ operates down to 4.5V input voltage and features undervoltage lockout (UVLO) at 4.35V typical with 8% hysteresis - ensuring reliable startup and continued function during automotive cold-crank events where battery voltage may dip to 4.5V–6V. Its ideal diode architecture (via external P1 MOSFET) further minimizes forward voltage drop compared to Schottky diodes, preserving margin for downstream regulators during these low-voltage periods.
What external components are required for basic operation of the MAX16914AUB+?
Basic operation of the MAX16914AUB+ requires two external p-channel MOSFETs (P1 for reverse-battery/ideal diode, P2 for overvoltage isolation), a 0.1µF ceramic bypass capacitor on VCC, a pullup resistor on OV (e.g., 45kΩ to VCC), and a resistor divider between TERM and GND with its midpoint connected to SET to program the overvoltage threshold. No additional biasing or compensation components are needed - the MAX16914AUB+ integrates all necessary sensing, timing, and drive circuitry.
Does the MAX16914AUB+ provide thermal protection?
Yes, the MAX16914AUB+ includes integrated thermal shutdown that disables both GATE1 and GATE2 outputs when the junction temperature exceeds +170°C, with 20°C hysteresis to prevent oscillation. This protects the IC and external MOSFETs during prolonged overvoltage events or high-current faults. The device is rated for continuous operation up to +125°C ambient and +150°C junction temperature - consistent with AEC-Q100 Grade 0 requirements for under-hood automotive applications.
MAX16914AUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- -
- Number of Cells:
- -
- Fault Protection:
- Over Voltage, Reverse Battery
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX16914AUB+ FAQ
1.How can I place an order for MAX16914AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16914AUB+ 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 MAX16914AUB+ reliable?
The price and inventory of MAX16914AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16914AUB+ is usually 5 days.
3.What payment methods are accepted for MAX16914AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16914AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16914AUB+?
MAX16914AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16914AUB+ 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 MAX16914AUB+?
For technical support, including MAX16914AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16914AUB+ requirements.
6.How does Aetrix verify that MAX16914AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX16914AUB+ 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 MAX16914AUB+ meets industry standards.
7.What is the process for return or replacement of MAX16914AUB+?
All MAX16914AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16914AUB+, 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 MAX16914AUB+ part is unused and in its original packaging.
Return procedure for MAX16914AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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