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Analog Devices Inc./Maxim Integrated MAX16915AUB+
- Part No.:
- MAX16915AUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX16915AUB+.pdf
- Description:
- IC BATT PROTECTION 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,027
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Product details
Overview
MAX16915AUB+ from Maxim Integrated is an automotive-grade overvoltage limiter controller IC that monitors output voltage via external resistive divider and regulates it using an external p-channel MOSFET (P2) during transients up to +44V, while providing reverse-battery protection down to -75V and cold-crank operation from 4.5V input. It features 29µA quiescent current, 6µA shutdown current, and operates across -40°C to +125°C.
For engineers reviewing the MAX16915AUB+ datasheet, MAX16915AUB+ pinout, MAX16915AUB+ application, or MAX16915AUB+ equivalent, this page delivers verified functional role, precise overvoltage threshold programming method, GATE1/GATE2 timing behavior under back-charge and OV events, thermal shutdown response, and real-world load-dump survival capability in automotive power rail protection designs.
Technical Context
The MAX16915AUB+ implements a switched-linear overvoltage limiting architecture: TERM is internally connected to SENSE OUT, enabling output-voltage monitoring; when VOUT exceeds the SET-programmed threshold (e.g., 22V), GATE2 cycles on/off with ~4% hysteresis to clamp VOUT within a regulated window. This differs fundamentally from the MAX16914's switch-off-only behavior.
Reverse-battery protection is achieved by differential sensing between SENSE IN and SENSE OUT - the IC turns off P1 when VSENSE OUT − VSENSE IN > 25mV (typ), preventing downstream tank capacitor discharge during negative transients or cold-crank dips. GATE1 drive remains active down to 4.5V input, ensuring ideal diode conduction at low battery voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4.5V to 19V input - enables reliable startup and operation during automotive cold-crank (≥4.5V) and stable regulation up to alternator nominal max. |
| Overvoltage Threshold Range | Programmable via SET/TERM resistor divider - supports precise trip points (e.g., 22V) for load-dump compliance without internal fixed thresholds. |
| Quiescent Current | 29µA at +25°C - meets stringent automotive module sleep-mode requirements while maintaining full protection readiness. |
| Shutdown Current | 6µA - reduces system standby power to negligible levels without disabling reverse-battery protection. |
| Reverse-Battery Tolerance | -75V on SENSE IN (≤2ms) - protects against severe negative transients common in vehicle jump-starts or battery reversal faults. |
| Thermal Shutdown | +170°C activation with +20°C hysteresis - prevents permanent damage during sustained overvoltage-limited operation of external P2 MOSFET. |
| Back-Charge Detection Threshold | 25mV differential (VSENSE OUT − VSENSE IN) - triggers fast P1 turn-off (<10µs) to prevent tank capacitor discharge into source during input collapse. |
Pinout & Package
MAX16915AUB+ 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 is qualified for automotive AEC-Q100 Grade 0 (-40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Bypassed with ≥0.1µF ceramic capacitor; powers internal bias and gate drivers; UVLO activates below 4.35V. |
| GATE1 (Pin 2) | P1 MOSFET gate driver | Drives external pFET for reverse-battery and ideal-diode functions; remains active during SHDN to preserve protection. |
| SENSE IN (Pin 3) | Differential sense input (input side) | Monitors battery-side voltage; combined with SENSE OUT enables 25mV back-charge detection and -75V transient tolerance. |
| SHDN (Pin 4) | Active-low shutdown/wake input | Pulls GATE2 to VCC when low; reduces total supply current to 6µA; internally pulled down with 0.5µA sink. |
| OV (Pin 5) | Open-drain overvoltage indicator | Asserts low when VOUT > programmed threshold; toggles with P2 switching frequency during sustained overvoltage events. |
| GND (Pin 6) | Ground reference | Common return for all analog and power paths; requires low-inductance connection to minimize noise coupling. |
| 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) | Voltage-divider termination output | Internally tied to SENSE OUT in MAX16915AUB+ - enables true output-voltage monitoring for limiter mode (vs. VCC monitoring in MAX16914). |
| SENSE OUT (Pin 9) | Differential sense input (output side) | Monitors load-side voltage; forms back-charge detection pair with SENSE IN; connects internally to TERM in MAX16915AUB+. |
| GATE2 (Pin 10) | P2 MOSFET gate driver | Drives external pFET for overvoltage limiting; switches rapidly between VCC (off) and GND (on) to regulate VOUT during transients. |
Key Features
| Feature | Design Value |
|---|---|
| Output-voltage-based overvoltage limiting | TERM tied to SENSE OUT enables direct VOUT monitoring - eliminates error from input-line drop and ensures accurate downstream rail protection. |
| Back-charge prevention with <10µs response | 25mV differential detection and fast GATE1 turn-off (<10µs) protect downstream capacitors during cold-crank or superimposed AC transients. |
| Reverse-battery protection to -75V | SENSE IN withstands -75V for ≤2ms - removes need for series Schottky diodes while maintaining full system survivability in jump-start scenarios. |
| Ultra-low quiescent current (29µA) | Enables always-on protection in battery-powered modules without compromising ECU sleep-mode current budgets. |
| Thermal shutdown with hysteresis | +170°C trip / +150°C recovery prevents thermal runaway during prolonged overvoltage limiting of high-power external MOSFETs. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Supply |
|---|---|
Use Scenario: BCM supplies multiple sensors and actuators from vehicle battery; exposed to load dumps (+44V) and reverse-battery faults during service. IC Role / Device Role / Timing Role: MAX16915AUB+ acts as primary front-end protector - continuously monitors VOUT, limits transients via P2 switching, and blocks reverse current via P1. Use Value: Eliminates need for TVS + series diode stack; reduces forward drop by >800mV vs. Schottky, enabling reliable cold-crank operation at 4.5V. |
Use Scenario: ADAS camera module requires clean, uninterrupted 5V/3.3V rail; sensitive to voltage spikes and must survive jump-start (-75V). IC Role / Device Role / Timing Role: MAX16915AUB+ serves as intelligent input conditioner - clamps VOUT to 5.2V during load dump, prevents back-charge from camera's bulk cap during ignition dip. Use Value: Maintains camera uptime during 100ms load dump; avoids brownout resets and image corruption caused by unregulated overvoltage or reverse discharge. |
| Industrial PLC I/O Power Rail | Telematics Control Unit (TCU) |
Use Scenario: PLC field I/O power rail interfaces with 24V industrial battery systems prone to wiring faults and polarity reversals. IC Role / Device Role / Timing Role: MAX16915AUB+ functions as fault-tolerant interface controller - detects -75V reverse bias and disables P1 within microseconds; regulates VOUT during surge events. Use Value: Prevents catastrophic failure of isolated RS-485 transceivers and analog input circuitry; extends field unit MTBF by eliminating diode burnout failures. |
Use Scenario: TCU draws power directly from vehicle battery; must operate through start-stop cycles, load dumps, and roadside jump-starts. IC Role / Device Role / Timing Role: MAX16915AUB+ provides dual-stage protection - P1 blocks reverse current during jump-start; P2 limits VOUT to 14.5V during alternator overvoltage. Use Value: Enables continuous LTE/Wi-Fi connectivity during engine cranking; avoids modem re-synchronization delays caused by rail collapse or overvoltage reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage and reverse-battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16914AUB+ | Uses TERM-to-VCC connection → monitors VCC instead of VOUT; implements overvoltage switch-off (not limiting); no sustained VOUT regulation. | Suitable for systems where load-dump protection only requires disconnect (not regulation), and input-line drop is negligible. | Select MAX16914AUB+ when downstream rail stability during overvoltage is not required and simpler VCC-based trip suffices. |
| TPS43060RTER | Integrated high-side switch with fixed 20V OVP and no reverse-battery protection; lacks differential sense inputs and back-charge detection. | Applicable only in non-automotive, positive-only 12V systems with moderate transient immunity needs. | Choose TPS43060RTER only for cost-sensitive industrial applications without reverse-polarity or cold-crank requirements. |
Compared with MAX16914AUB+, the MAX16915AUB+ provides superior downstream rail integrity during prolonged overvoltage by actively regulating VOUT rather than disconnecting; compared with TPS43060RTER, it delivers comprehensive automotive-grade fault coverage including -75V reverse tolerance and microsecond back-charge response - essential for AEC-Q100-compliant designs.
Availability
MAX16915AUB+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, industrial PLC I/O power rails, and telematics control units requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX16915AUB+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX16915AUB+ belongs to Maxim's automotive power protection controller family, designed specifically to replace discrete diode/MOSFET solutions in harsh-environment 12V/24V systems requiring AEC-Q100 qualification and robust transient survival.
FAQ
What is the key functional difference between MAX16915AUB+ and MAX16914AUB+?
The MAX16915AUB+ implements output-voltage-based overvoltage limiting: TERM connects internally to SENSE OUT, enabling direct VOUT monitoring and regulated clamping via GATE2 switching. In contrast, MAX16914AUB+ ties TERM to VCC and performs input-voltage-based switch-off only - it disconnects the load during overvoltage but does not regulate VOUT. This makes MAX16915AUB+ suitable for applications requiring uninterrupted downstream power during transients.
How does MAX16915AUB+ achieve reverse-battery protection down to -75V?
The MAX16915AUB+ achieves -75V reverse-battery tolerance on SENSE IN by leveraging proprietary BiCMOS process design and internal clamping structures. During negative transients, the SENSE IN pin safely sinks current without damage for ≤2ms, while GATE1 is driven to GND to fully turn off the external P1 MOSFET. This blocks reverse current flow and protects downstream circuitry - eliminating the need for series protection diodes and their associated forward voltage drop.
What is the recommended method to set the overvoltage threshold for MAX16915AUB+?
The overvoltage threshold for MAX16915AUB+ is set using a resistor divider between TERM and GND, with SET connected to the midpoint. The IC compares the SET voltage to a 1.20V internal reference; thus, R2 = (1.20V × RTOTAL) / VOV. For a 22V threshold, RTOTAL should be ≤200kΩ (based on max ISET = 1µA). Use standard 1% resistors, prefer lower values for accuracy, and ensure power dissipation in R1/R2 stays within rating - e.g., 12kΩ (R2) and 188kΩ (R1) for 22V.
Does MAX16915AUB+ remain functional during automotive cold-crank conditions?
Yes, MAX16915AUB+ operates continuously down to 4.5V input (VCC), supporting cold-crank conditions typical in 12V automotive systems. Its GATE1 driver maintains full enhancement of the external P1 MOSFET even at low VCC, minimizing forward voltage drop (ILOAD × RDS(ON)) and preserving downstream rail voltage. The 29µA quiescent current ensures minimal loading on weak batteries, and undervoltage lockout releases cleanly at 4.35V to avoid chatter near the dropout threshold.
Can MAX16915AUB+ be used without an external microcontroller or system processor?
Yes, MAX16915AUB+ is a fully autonomous protection controller requiring no external processor intervention. All functions - overvoltage limiting, reverse-battery blocking, back-charge prevention, thermal shutdown, and OV indication - are implemented in hardware. The SHDN pin allows simple enable/disable control via a pull-up or switch; otherwise, connecting SHDN to VCC configures MAX16915AUB+ for always-on operation with no firmware dependency.
MAX16915AUB+ 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
MAX16915AUB+ FAQ
1.How can I place an order for MAX16915AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16915AUB+ 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 MAX16915AUB+ reliable?
The price and inventory of MAX16915AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16915AUB+ is usually 5 days.
3.What payment methods are accepted for MAX16915AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16915AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16915AUB+?
MAX16915AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16915AUB+ 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 MAX16915AUB+?
For technical support, including MAX16915AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16915AUB+ requirements.
6.How does Aetrix verify that MAX16915AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX16915AUB+ 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 MAX16915AUB+ meets industry standards.
7.What is the process for return or replacement of MAX16915AUB+?
All MAX16915AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16915AUB+, 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 MAX16915AUB+ part is unused and in its original packaging.
Return procedure for MAX16915AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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