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Analog Devices Inc. LT8672HDDB#TRMPBF
- Part No.:
- LT8672HDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8672HDDB#TRMPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
LT8672HDDB#TRMPBF 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, 3.5µA shutdown current, and support for 100kHz/2VP-P AC ripple rectification in 3V–42V systems.
For engineers reviewing the LT8672HDDB#TRMPBF datasheet, LT8672HDDB#TRMPBF pinout, LT8672HDDB#TRMPBF application, or LT8672HDDB#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal specs (−40°C to 150°C), real-world ripple rectification performance up to 100kHz, and direct alternative part comparisons with documented functional trade-offs.
Technical Context
The LT8672HDDB#TRMPBF integrates a hysteretic auxiliary boost regulator (11V AUX–DRAIN output) to drive the external MOSFET gate above input voltage, enabling full enhancement of logic-level N-FETs. Its dual-path gate driver delivers 300mA pull-down and −50mA pull-up current with 0.6µs turn-off and 1.7µs turn-on delay (CGS = 10nF).
It implements fast pull-up (75mV threshold) and fast pull-down (−70mV threshold) comparators to handle transient SOURCE–DRAIN reversals, supporting robust operation during load dump, cold crank (3.2V min), and reverse battery (−40V) events without latch-up or damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3V to 42V input; supports cold crank down to 3.2V without dropout |
| Forward Regulation Voltage | 20mV typical; reduces conduction loss by >90% vs. Schottky diode |
| Quiescent Current | 20µA active, 3.5µA shutdown; enables always-on automotive modules |
| AC Ripple Handling | Rectifies 2VP-P up to 100kHz or 6VP-P up to 50kHz; meets ISO16750/LV124 |
| Reverse Input Protection | Withstands −40V on SOURCE/EN pins; isolates load during reverse battery |
| Junction Temperature Range | −40°C to 150°C; qualified per AEC-Q100 Grade H for under-hood use |
| Enable Threshold Accuracy | 1.21V ±50mV with 70mV hysteresis; enables precise undervoltage lockout |
Pinout & Package
LT8672HDDB#TRMPBF uses a 10-lead 3mm × 2mm plastic DFN package with exposed pad (Pin 11), rated θJA = 76°C/W. The exposed pad must be shorted to GND or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (1) | Shutdown control input | Active-high enable; <1.21V disables controller and reduces IQ to 3.5µA |
| GND (2) | No-function ground | Unused internal node; connect to PCB ground plane |
| PG (3) | Open-drain power-good flag | Pulls low if AUX not regulated, shutdown active, or fast pull-up active >17µs |
| GND (4) | Main internal ground reference | Return path for all internal circuitry; tie directly to local GND plane |
| NC (5) | No-connect terminal | Internally unconnected; may be grounded or left floating |
| AUXSW (6) | Boost regulator switch node | Drives external inductor; keep trace short to minimize EMI and switching losses |
| AUX (7) | Boost-regulated gate drive supply | Outputs 11V above DRAIN; requires 1µF capacitor to DRAIN pin only |
| DRAIN (8) | Input voltage sense & supply | Senses VIN; powers IC internals; bypass with ≥4.7µF ceramic capacitor |
| SOURCE (9) | MOSFET source return & sensing | Sense node for VSD regulation; withstands −40V; no bypass cap >60nF allowed |
| GATE (10) | External MOSFET gate driver | Delivers ±300mA peak; regulates VSD to 20mV; connects directly to FET gate |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward drop | 20mV regulation enables cold-crank operation at 3.2V input without buck-boost conversion |
| Integrated auxiliary boost | 11V AUX–DRAIN output eliminates need for external charge pump or bootstrap circuit |
| Fast transient response | 0.6µs gate turn-off and 1.7µs turn-on (CGS=10nF) suppresses reverse recovery energy |
| AEC-Q100 Grade H qualification | Validated for −40°C to 150°C junction operation; suitable for engine compartment placement |
| Reverse input fault protection | −40V tolerance on SOURCE/EN pins + automatic gate pull-to-source during negative transients |
Applications
| Automotive Battery Protection | Industrial Power Supplies |
|---|---|
Use Scenario: Reverse battery connection during service or jump-start in 12V/24V vehicle ECUs. IC Role / Device Role / Timing Role: Active rectifier controller enforcing unidirectional current flow while blocking −40V reverse input. Use Value: Prevents load damage and eliminates 0.3–0.4V Schottky drop, preserving minimum input headroom during cold crank. |
Use Scenario: Input stage protection in DIN-rail mounted PLC power modules exposed to field wiring faults. IC Role / Device Role / Timing Role: Replaces series diode for reverse polarity and overvoltage resilience in 24V industrial supplies. Use Value: Reduces thermal stress on PCB by >90% versus diode solution, enabling compact heatsink-free designs. |
| Portable Instrumentation | Start-Stop System Modules |
Use Scenario: Field-replaceable battery packs in handheld test equipment requiring hot-swap safety. IC Role / Device Role / Timing Role: Controls external MOSFET as ideal diode to prevent backfeed and enable seamless battery switchover. Use Value: 20µA operating quiescent current extends battery life; PG pin signals MOSFET readiness before load engagement. |
Use Scenario: Power path management during engine restart in automotive start-stop systems with 12V lead-acid batteries. IC Role / Device Role / Timing Role: Maintains system power during 3.2V cold-crank dips while suppressing ripple-induced MOSFET heating. Use Value: Supports 100kHz/2VP-P ripple rectification, reducing output capacitor RMS current and extending lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8672JDDB#TRMPBF | Same silicon, identical electrical specs, but rated −40°C to 150°C (J-grade) and shipped in standard tape-and-reel (no mini-reel) | Requires standard reel handling; lacks mini-reel convenience for low-volume prototyping | Select when full production volume justifies standard reel logistics and J-grade temp validation suffices |
| MAX5054ATA+T | Lower max input voltage (28V vs. 42V); no integrated boost regulator; requires external gate drive supply | Not suitable for 42V load-dump or cold-crank scenarios; limited to 24V industrial systems | Choose only for cost-sensitive 24V applications where external boost supply is acceptable |
Compared with LT8672HDDB#TRMPBF, LT8672JDDB#TRMPBF offers identical performance in a standard reel format but lacks mini-reel convenience, while MAX5054ATA+T sacrifices 42V capability and integrated boost-requiring additional BOM components and limiting automotive use.
Availability
LT8672HDDB#TRMPBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power supplies, portable instrumentation, and start-stop system modules requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for LT8672HDDB#TRMPBF 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.
The LT8672 product line delivers AEC-Q100-qualified active rectifier controllers optimized for reverse battery protection and high-frequency input ripple rectification in harsh automotive environments.
FAQ
What is the maximum AC ripple frequency the LT8672HDDB#TRMPBF can rectify?
The LT8672HDDB#TRMPBF rectifies 2VP-P AC ripple up to 100kHz and 6VP-P ripple up to 50kHz, as verified in the datasheet's Electrical Characteristics table and Typical Performance plots. This capability meets ISO16750-2 and LV124 automotive ripple requirements. The LT8672HDDB#TRMPBF achieves this via ultrafast gate drive (0.6µs turn-off) and dedicated fast pull-up/pull-down comparators that override the 20mV regulation loop during transients.
Does the LT8672HDDB#TRMPBF require an external gate driver or charge pump?
No, the LT8672HDDB#TRMPBF integrates a complete auxiliary boost regulator that generates a regulated 11V AUX–DRAIN output to drive the external N-channel MOSFET gate above the input rail. This eliminates the need for external charge pumps, bootstrap capacitors, or discrete gate drivers. The LT8672HDDB#TRMPBF datasheet specifies VAUX–VDRAIN = 10.2V to 11.8V, ensuring full enhancement of logic-level FETs across its 3V–42V operating range.
How does the LT8672HDDB#TRMPBF protect against reverse battery connections?
The LT8672HDDB#TRMPBF protects against reverse battery by tolerating −40V on SOURCE and EN/UVLO pins, and by actively pulling GATE to SOURCE when SOURCE goes negative-turning off the external MOSFET and isolating DRAIN from the reversed input. This behavior is confirmed in the Operation section and Absolute Maximum Ratings table. The LT8672HDDB#TRMPBF also features fast pull-down circuitry that responds to negative transients within microseconds, preventing destructive reverse current buildup.
What is the purpose of the PG (Power Good) pin on the LT8672HDDB#TRMPBF?
The PG pin on the LT8672HDDB#TRMPBF is an open-drain output that signals when the external MOSFET is ready to conduct load current. It pulls low if the device is in shutdown, AUX voltage has not reached regulation during startup, or the fast pull-up path remains active >17µs-indicating abnormal gate drive conditions. The LT8672HDDB#TRMPBF PG pin allows downstream circuitry to delay load engagement until the active rectifier is fully operational, preventing inrush or overload events.
Can the LT8672HDDB#TRMPBF operate during automotive cold crank conditions?
Yes, the LT8672HDDB#TRMPBF operates down to 3V input (minimum drain voltage = 2.85V) and is specified for cold crank events where battery voltage drops to 3.2V. Its 20mV forward regulation voltage preserves critical input headroom-enabling buck regulators to remain functional without requiring inefficient buck-boost alternatives. This capability is validated in the datasheet's Applications Information section and supported by AEC-Q100 Grade H qualification (−40°C to 150°C).
LT8672HDDB#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- 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):
- -
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LT8672HDDB#TRMPBF FAQ
1.How can I place an order for LT8672HDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672HDDB#TRMPBF 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 LT8672HDDB#TRMPBF reliable?
The price and inventory of LT8672HDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672HDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8672HDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672HDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672HDDB#TRMPBF?
LT8672HDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672HDDB#TRMPBF 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 LT8672HDDB#TRMPBF?
For technical support, including LT8672HDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672HDDB#TRMPBF requirements.
6.How does Aetrix verify that LT8672HDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8672HDDB#TRMPBF 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 LT8672HDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8672HDDB#TRMPBF?
All LT8672HDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672HDDB#TRMPBF, 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 LT8672HDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT8672HDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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