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Analog Devices Inc. LT8672EMS#WTRPBF
- Part No.:
- LT8672EMS#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT8672EMS#WTRPBF.pdf
- Description:
- IC GATE DRVR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
LT8672EMS#WTRPBF from Analog Devices is an AEC-Q100 qualified active rectifier controller for automotive reverse battery protection and input ripple rectification. It drives an external N-channel MOSFET to replace Schottky diodes, delivering 20mV forward regulation voltage, 3V–42V operating range, and <20µA quiescent current in active mode-enabling cold-crank operation down to 3.2V in 12V automotive systems.
For engineers reviewing the LT8672EMS#WTRPBF datasheet, LT8672EMS#WTRPBF pinout, LT8672EMS#WTRPBF application, or LT8672EMS#WTRPBF equivalent, key selection criteria include reverse input protection to –40V, 100kHz AC ripple rectification capability (2VP-P), integrated auxiliary boost regulator (11V above DRAIN), power good signaling, and MSOP-10 package compatibility with automotive thermal and layout constraints.
Technical Context
The LT8672EMS#WTRPBF implements a dual-loop control architecture: a precision 20mV SOURCE–DRAIN regulation loop for steady-state forward conduction, and independent fast pull-up (75mV threshold) and fast pull-down (–70mV threshold) comparators for sub-microsecond transient response to AC ripple up to 100kHz. Its integrated auxiliary boost regulator delivers regulated 11V gate drive referenced to DRAIN using a hysteretic 100mA current-limited switch.
Operation includes fault-aware power good (PG) monitoring-asserting low during shutdown, AUX under-regulation, or >17µs fast pull-up activation-and EN/UVLO with 1.21V threshold and 70mV hysteresis for programmable undervoltage lockout. The device withstands –40V to 42V absolute max ratings on SOURCE and EN/UVLO pins, supporting reverse battery survival and load-dump resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Regulation Voltage | 20mV - Enables cold-crank operation at ≤3.2V input without buck-boost conversion |
| Operating Voltage Range | 3V to 42V - Covers full automotive battery range including load dump (42V) and cold crank (3.2V) |
| Reverse Input Protection | –40V on SOURCE/EN/UVLO - Survives reverse battery connection without external clamping |
| Quiescent Current | 20µA typical in regulation - Minimizes standby power loss in always-on vehicle modules |
| AC Ripple Rectification | Up to 100kHz at 2VP-P - Meets ISO16750/LV124 ECU ripple immunity requirements |
| AUX Boost Output | 11V above DRAIN - Ensures full enhancement of logic-level N-MOSFETs across full input range |
| Gate Drive Delay | 1.7µs turn-on / 0.6µs turn-off - Limits body-diode conduction time during high-frequency ripple |
Pinout & Package
LT8672EMS#WTRPBF uses a 10-lead plastic MSOP package (3mm × 3mm, 0.5mm pitch) with exposed pad not present in MSOP variant. Thermal resistance θJA = 160°C/W enables operation at 125°C junction temperature in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable and undervoltage lockout input | Shuts down controller and boost regulator below 1.21V; draws <0.1µA bias current |
| GND (Pin 2) | No-function ground tie | Must be connected to system ground but carries no internal current |
| PG (Pin 3) | Open-drain power good output | Pulls low during shutdown, AUX under-regulation, or >17µs fast pull-up activation |
| GND (Pin 4) | Main internal circuit ground | Primary return path for all internal circuitry; requires low-impedance local plane connection |
| NC (Pin 5) | No-connect terminal | Internally unconnected; may be grounded or left floating per layout needs |
| AUXSW (Pin 6) | Auxiliary boost regulator switch node | Drives external boost inductor; requires minimal PCB trace area to limit EMI |
| AUX (Pin 7) | Auxiliary boost regulator output | Provides 11V gate drive referenced to DRAIN; requires 1µF capacitor to DRAIN |
| DRAIN (Pin 8) | Input voltage sense and supply rail | Senses input for regulation; powers internal circuitry; bypassed with ≥4.7µF capacitor |
| SOURCE (Pin 9) | MOSFET source sensing and return | Reference for SOURCE–DRAIN regulation; protected to –40V; no bypass cap allowed >60nF |
| GATE (Pin 10) | External MOSFET gate driver output | Delivers ±300mA peak drive; regulates VGS to maintain 20mV forward drop |
Key Features
| Feature | Design Value |
|---|---|
| 20mV ultra-low forward drop | Reduces conduction loss by >90% vs. Schottky diode, easing cold-crank minimum input voltage requirement |
| Integrated 11V auxiliary boost regulator | Eliminates need for external charge pump; ensures full gate drive across 3V–42V input range |
| Fast pull-up/pull-down transient response | Enables clean rectification of 100kHz/2VP-P ripple without body-diode conduction spikes |
| Power good (PG) fault monitoring | Signals MOSFET readiness and detects startup faults, enabling safe load enable sequencing |
| AEC-Q100 Grade E qualification | Validated for –40°C to +125°C operation with automotive reliability testing and PPAP support |
Applications
| Automotive Battery Protection | Industrial Power Supply Input Stage |
|---|---|
Use Scenario: Reverse battery connection protection in engine control units (ECUs) during service or jump-start events. IC Role / Device Role / Timing Role: Active rectifier controller replacing Schottky diode in series with battery input. Use Value: Withstands –40V reverse input while maintaining 20mV forward drop, eliminating thermal derating and enabling compact PCB layout. |
Use Scenario: Input stage protection for industrial PLC power supplies subjected to field wiring errors. IC Role / Device Role / Timing Role: Reverse polarity and overvoltage protector driving external N-MOSFET as ideal diode. Use Value: 42V absolute max rating and 3.5µA shutdown current ensure robustness against miswiring and low-power standby compliance. |
| Portable Test Equipment Power Path | Automotive ADAS Camera Module |
Use Scenario: Dual-input power selection (battery + USB) in handheld instrumentation with strict quiescent current limits. IC Role / Device Role / Timing Role: Low-IQ active rectifier enabling seamless input switchover without voltage droop. Use Value: 20µA operating IQ extends battery life; PG signal synchronizes load enable to gate drive readiness. |
Use Scenario: Input ripple filtering for 12V camera modules exposed to alternator noise per ISO16750-2. IC Role / Device Role / Timing Role: High-frequency ripple rectifier suppressing 50kHz alternator harmonics before DC/DC conversion. Use Value: 100kHz rectification capability reduces output capacitor RMS current by >60%, lowering electrolytic size and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM74610-Q1 | Single-supply controller with integrated gate driver; no auxiliary boost; 30mV regulation; 40V max | Lacks boost regulator-requires external gate drive solution for logic-level FETs at low input voltages | Preferred when input stays >5V and external gate drive is acceptable |
| MAX5079 | Discrete gate driver IC; no regulation loop or PG output; requires external comparator and reference | Higher BOM count and design complexity; no built-in fault monitoring or startup sequencing | Selected when custom regulation thresholds or multi-FET control is required |
Compared with LM74610-Q1 and MAX5079, the LT8672EMS#WTRPBF uniquely integrates a 11V auxiliary boost regulator, 20mV precision regulation, and PG fault signaling in a single AEC-Q100 qualified MSOP package-reducing component count, simplifying layout, and ensuring reliable cold-crank operation without external support circuitry.
Availability
LT8672EMS#WTRPBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power supply input stages, portable test equipment power path management, and ADAS camera module ripple suppression requiring stable component supply and automotive-grade reliability.
Supply support for LT8672EMS#WTRPBF 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, signal chain, and timing solutions.
The LT8672EMS#WTRPBF belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for reverse battery protection and high-frequency input ripple rectification in harsh ECU and ADAS environments.
FAQ
What is the primary function of the LT8672EMS#WTRPBF in an automotive power system?
The LT8672EMS#WTRPBF functions as an active rectifier controller that replaces Schottky diodes in reverse battery protection circuits. It drives an external N-channel MOSFET to achieve a 20mV forward voltage drop, enabling operation during cold-crank events down to 3.2V while reducing power dissipation by >90% compared to passive diodes. Its AEC-Q100 qualification confirms suitability for under-hood automotive applications.
How does the LT8672EMS#WTRPBF handle high-frequency input ripple such as alternator noise?
The LT8672EMS#WTRPBF rectifies AC input ripple up to 100kHz at 2VP-P amplitude using dedicated fast pull-up and fast pull-down comparators with 75mV and –70mV thresholds. This sub-microsecond response prevents extended body-diode conduction, minimizing reverse current transients and reducing RMS current in output capacitors-critical for meeting ISO16750-2 alternator noise immunity requirements.
Does the LT8672EMS#WTRPBF require an external gate driver or charge pump?
No, the LT8672EMS#WTRPBF integrates a complete auxiliary boost regulator that generates a regulated 11V gate drive voltage referenced to the DRAIN pin. This eliminates the need for external charge pumps or gate drivers, ensuring full enhancement of logic-level N-MOSFETs across the entire 3V–42V input range-including during cold-crank conditions where input voltage drops to 3.2V.
What protection features does the LT8672EMS#WTRPBF provide against reverse battery connections?
The LT8672EMS#WTRPBF provides reverse input protection to –40V on both SOURCE and EN/UVLO pins. When SOURCE goes negative, its internal circuitry pulls GATE to SOURCE, turning off the external MOSFET and isolating DRAIN from the negative input. This protects downstream circuitry without requiring external TVS diodes-though clamping is recommended for extreme short-circuit transients.
Can the LT8672EMS#WTRPBF be used in non-automotive applications such as industrial power supplies?
Yes, the LT8672EMS#WTRPBF is suitable for industrial power supply input stages requiring reverse polarity protection and low forward drop. Its 3V–42V operating range, –40V reverse tolerance, 20µA quiescent current, and 100kHz ripple handling support applications like PLC power inputs, test equipment battery switchover, and medical devices needing high-reliability input protection without thermal derating.
LT8672EMS#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- -
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 3V ~ 42V
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- 50mA, 50mA
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LT8672EMS#WTRPBF FAQ
1.How can I place an order for LT8672EMS#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672EMS#WTRPBF 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 LT8672EMS#WTRPBF reliable?
The price and inventory of LT8672EMS#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672EMS#WTRPBF is usually 5 days.
3.What payment methods are accepted for LT8672EMS#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672EMS#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672EMS#WTRPBF?
LT8672EMS#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672EMS#WTRPBF 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 LT8672EMS#WTRPBF?
For technical support, including LT8672EMS#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672EMS#WTRPBF requirements.
6.How does Aetrix verify that LT8672EMS#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LT8672EMS#WTRPBF 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 LT8672EMS#WTRPBF meets industry standards.
7.What is the process for return or replacement of LT8672EMS#WTRPBF?
All LT8672EMS#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672EMS#WTRPBF, 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 LT8672EMS#WTRPBF part is unused and in its original packaging.
Return procedure for LT8672EMS#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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