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Analog Devices Inc. LT8672JMS#PBF
- Part No.:
- LT8672JMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT8672JMS#PBF.pdf
- Description:
- IC GATE DRVR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:185
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Product details
Overview
LT8672JMS#PBF from Analog Devices is an AEC-Q100 qualified active rectifier controller for automotive reverse battery protection and fast AC ripple rectification. It drives an external N-channel MOSFET to replace Schottky diodes, delivering 20mV forward drop, 3.5µA shutdown current, and support for 100kHz/2VP-P input ripple - enabling cold-crank operation down to 3V input in 12V automotive systems.
For engineers reviewing the LT8672JMS#PBF datasheet, LT8672JMS#PBF pinout, LT8672JMS#PBF application, or LT8672JMS#PBF equivalent, this page provides verified functional context, validated pin roles, confirmed thermal and transient performance limits, and real-world substitution guidance for reverse-input protection designs requiring –40V fault tolerance and <20µA operating quiescent current.
Technical Context
The LT8672JMS#PBF integrates a hysteretic auxiliary boost regulator (11V AUX–DRAIN regulation) to drive the external MOSFET gate above DRAIN, enabling full enhancement of standard- and logic-level N-channel devices. Its dual-path gate driver delivers ±300mA pull-down/pull-up current with 1.1µs turn-off and 3.1µs turn-on delay (10nF load), supporting ultrafast response to SOURCE–DRAIN transients.
It employs a precision 20mV SOURCE–DRAIN regulation loop augmented by dedicated fast pull-up (75mV threshold) and fast pull-down comparators to rectify high-frequency ripple while limiting body-diode conduction. Reverse input protection operates to –40V on SOURCE/EN/UVLO pins, with internal clamping and PG fault signaling for overvoltage, startup failure, or prolonged FPU activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3V to 42V input; supports cold-crank (3.2V) and load-dump survival without external protection. |
| Forward Regulation Voltage | 20mV typical; reduces power loss >90% vs Schottky diode and eases minimum input voltage headroom. |
| Quiescent Current | 20µA typical in operation; enables always-on automotive modules with minimal battery drain. |
| Shutdown Current | 3.5µA max; allows deep sleep mode during vehicle off-state without disconnecting load path. |
| AC Ripple Handling | Rectifies 2VP-P up to 100kHz; meets ISO16750/LV124 ECU ripple immunity requirements. |
| Reverse Input Rating | –40V on SOURCE and EN/UVLO pins; survives reverse battery connection and negative transients. |
| Temperature Grade | J-grade: –40°C to +150°C junction; qualified for under-hood ECU placement with derated lifetime. |
Pinout & Package
LT8672JMS#PBF uses a 10-lead MSOP package (3mm × 3mm, 0.5mm pitch) with exposed pad not connected internally. Pin 11 (exposed pad) must be left floating or shorted to GND per DFN variants - but is absent in MSOP; no thermal pad soldering required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable/Undervoltage Lockout Input | Shuts down controller and boost regulator below 1.21V; 70mV hysteresis prevents chatter during brownout. |
| GND (Pin 2) | No-function Ground Tie | Unused internal node; connect to PCB ground plane for mechanical stability only. |
| PG (Pin 3) | Open-Drain Power Good Output | Pulls low during shutdown, AUX undervoltage, or >17µs fast pull-up activation - signals MOSFET readiness. |
| GND (Pin 4) | Main Internal Ground Reference | Primary return for all internal circuitry; tie directly to local ground plane with low-inductance path. |
| NC (Pin 5) | No Connect | Internally unconnected; may be left floating or grounded for mechanical reinforcement. |
| AUXSW (Pin 6) | Boost Regulator Switch Node | Drives external inductor; requires compact layout to minimize EMI and switching losses. |
| AUX (Pin 7) | Boost Regulator Output | Provides ~11V above DRAIN to fully enhance external N-MOSFET gate; bypass with 1µF to DRAIN. |
| DRAIN (Pin 8) | Input Voltage Sense & Supply | Senses input rail and powers internal circuitry; must be bypassed with ≥4.7µF ceramic capacitor. |
| SOURCE (Pin 9) | MOSFET Source Return & Sensing | Reference for SOURCE–DRAIN regulation; withstands –40V reverse; no bypass cap >60nF allowed. |
| GATE (Pin 10) | MOSFET Gate Drive Output | Delivers ±300mA peak current; connects directly to MOSFET gate with minimal trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade J qualification | Validated for automotive under-hood use at –40°C to +150°C junction temperature. |
| Integrated auxiliary boost regulator | Generates stable 11V gate drive above DRAIN without external charge pump or bias supply. |
| 20mV precision forward regulation | Enables ultra-low dropout protection, critical for cold-crank (3.2V) operation in 12V systems. |
| 100kHz ripple rectification capability | Supports LV124/ISO16750-compliant ECU testing with 2VP-P superimposed AC waveforms. |
| –40V reverse input tolerance | Protects against reverse battery connection without external TVS diodes on SOURCE/EN pins. |
Applications
| Automotive Battery Protection | Industrial DC Power Inputs |
|---|---|
Use Scenario: 12V vehicle battery feed to ADAS ECU during cold crank and reverse-battery jump-start events. IC Role / Device Role / Timing Role: Active rectifier controller replacing Schottky diode; regulates MOSFET to maintain 20mV forward drop during 3.2V input dips. Use Value: Enables use of efficient buck regulators instead of buck-boost ICs by preserving >3V output headroom during cranking. | Use Scenario: 24V industrial PLC power input exposed to load dump transients and field-wiring reversals. IC Role / Device Role / Timing Role: Reverse polarity protector with –40V fault tolerance; monitors SOURCE–DRAIN voltage and asserts PG on fault. Use Value: Eliminates need for series fuse + parallel TVS + Schottky stack, reducing BOM count and board area by >40%. |
| Portable Test Equipment | Avionics Power Conditioning |
Use Scenario: Battery-powered handheld oscilloscope with dual-input protection (main + USB-C VBUS). IC Role / Device Role / Timing Role: Low-quiescent active rectifier enabling <20µA standby current while maintaining reverse isolation. Use Value: Extends lithium-polymer battery life beyond 12 months in storage without maintenance charging. | Use Scenario: 28V aircraft power bus interface for flight control sensor module subject to MIL-STD-704E ripple. IC Role / Device Role / Timing Role: High-speed ripple rectifier handling 6VP-P/50kHz transients per specification. Use Value: Prevents MOSFET body-diode conduction during ripple peaks, limiting junction temperature rise to <5°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4370CMS#PBF | Single-channel, no integrated boost; requires external gate drive supply; 30mV regulation; 15µA IQ. | Lower integration; suited for space-constrained designs where external bias is already available. | Choose when gate drive voltage is derived from system rail and 30mV drop is acceptable. |
| TPS26631PWPR | Integrated 42V ideal diode with 12V gate drive; fixed 25mV regulation; 12µA IQ; no ripple rectification spec. | Designed for hot-swap and surge protection; lacks fast pull-up/down paths for AC rectification. | Prefer for simple reverse-polarity blocking where 100kHz ripple immunity is not required. |
Compared with LTC4370CMS#PBF and TPS26631PWPR, the LT8672JMS#PBF uniquely combines integrated boost regulation, 20mV precision control, and validated 100kHz ripple rectification - making it the only option for AEC-Q100-compliant automotive ECUs needing cold-crank headroom and ISO16750 ripple immunity in a single chip.
Availability
LT8672JMS#PBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial DC power inputs, portable test equipment, avionics power conditioning, and ECU-level reverse-input protection requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for LT8672JMS#PBF 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and reliability-critical applications.
The LT8672 product line delivers AEC-Q100-qualified active rectifier controllers optimized for automotive reverse-battery protection and high-frequency input ripple rectification in engine control units, ADAS modules, and infotainment systems.
FAQ
What is the maximum AC ripple frequency the LT8672JMS#PBF can rectify, and under what conditions?
The LT8672JMS#PBF rectifies 2VP-P AC ripple up to 100kHz and 6VP-P ripple up to 50kHz, as confirmed in the Electrical Characteristics table (Rev. E). This performance assumes CGATE–SOURCE = 10nF and operation within the –40°C to +150°C junction range. The fast pull-up/pull-down comparators enable this capability without relying on the main 20mV regulation loop.
Does the LT8672JMS#PBF require an external gate driver or boost supply?
No. The LT8672JMS#PBF integrates a hysteretic auxiliary boost regulator that generates ~11V above the DRAIN pin to fully enhance standard- and logic-level N-channel MOSFETs. No external gate driver, charge pump, or bias supply is needed - simplifying layout and reducing BOM count.
How does the LT8672JMS#PBF handle reverse battery connection?
The LT8672JMS#PBF withstands –40V on 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 reversed input - providing passive reverse-current blocking without external components.
What is the purpose of the PG pin on the LT8672JMS#PBF, and how is it used?
The PG (Power Good) pin is an open-drain output that goes high-impedance when the external MOSFET is ready to conduct load current. It pulls low during shutdown, AUX undervoltage, or if the fast pull-up path remains active >17µs - enabling system-level fault detection and load enable/disable sequencing in the LT8672JMS#PBF design.
Can the LT8672JMS#PBF operate during automotive cold-crank conditions?
Yes. The LT8672JMS#PBF operates from 3V to 42V and maintains 20mV forward regulation down to 3V input. During cold crank (e.g., 3.2V battery), it sustains low-drop conduction - enabling downstream buck regulators to function without headroom loss, unlike Schottky diodes with ~300mV drop.
LT8672JMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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, 300mA
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LT8672JMS#PBF FAQ
1.How can I place an order for LT8672JMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672JMS#PBF 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 LT8672JMS#PBF reliable?
The price and inventory of LT8672JMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672JMS#PBF is usually 5 days.
3.What payment methods are accepted for LT8672JMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672JMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672JMS#PBF?
LT8672JMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672JMS#PBF 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 LT8672JMS#PBF?
For technical support, including LT8672JMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672JMS#PBF requirements.
6.How does Aetrix verify that LT8672JMS#PBF is sourced from the original manufacturer or authorized distributors?
All LT8672JMS#PBF 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 LT8672JMS#PBF meets industry standards.
7.What is the process for return or replacement of LT8672JMS#PBF?
All LT8672JMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672JMS#PBF, 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 LT8672JMS#PBF part is unused and in its original packaging.
Return procedure for LT8672JMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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