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Analog Devices Inc. LT8672EDDB#TRMPBF
- Part No.:
- LT8672EDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8672EDDB#TRMPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT8672EDDB#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 drop, 3V–42V input range, and 100kHz AC ripple rectification capability up to 2VP-P - enabling cold-crank operation down to 3.2V in ECU power rails.
For engineers reviewing the LT8672EDDB#TRMPBF datasheet, LT8672EDDB#TRMPBF pinout, LT8672EDDB#TRMPBF application, or LT8672EDDB#TRMPBF equivalent, key selection criteria include reverse input protection to –40V, ultra-low 20µA operating quiescent current, integrated auxiliary boost regulator (11V above DRAIN), PG fault signaling, and compatibility with logic-level MOSFETs in compact 3mm × 2mm DFN packaging.
Technical Context
The LT8672EDDB#TRMPBF implements a dual-loop control architecture: a precision 20mV SOURCE–DRAIN regulation loop for steady-state conduction and independent fast pull-up/pull-down comparators (75mV/–60mV thresholds) for 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 driving an external inductor.
Protection logic includes EN/UVLO with 1.21V threshold and 70mV hysteresis, open-drain PG output asserting low during shutdown, AUX under-regulation, or FPU timeout (>17µs), and robust –40V tolerance on SOURCE/EN pins. The device operates across –40°C to 125°C junction temperature and meets AEC-Q100 Grade E requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 42V operating; withstands –40V reverse without damage - enables direct connection to automotive battery with load dump/cold crank resilience. |
| Forward Regulation Voltage | 20mV typical - reduces minimum input voltage requirement by ~0.35V vs. Schottky diode, easing cold-crank headroom for buck regulators. |
| Quiescent Current | 20µA typical in operation; 3.5µA in shutdown - extends always-on system battery life in vehicle off-mode. |
| AC Ripple Handling | Rectifies 2VP-P up to 100kHz - meets ISO16750-2 and LV124 ripple immunity requirements for modern ECUs. |
| AUX Boost Output | 11V above DRAIN, ±0.8V regulation - ensures full enhancement of logic-level N-MOSFETs across full input range without external bias. |
| Gate Drive Capability | –50mA pull-up / 300mA pull-down - achieves <3.1µs turn-on and <1.1µs turn-off with 10nF gate capacitance, minimizing body diode conduction time. |
| EN/UVLO Threshold | 1.21V with 70mV hysteresis - allows precise undervoltage lockout programming via resistive divider for system brown-out prevention. |
Pinout & Package
LT8672EDDB#TRMPBF uses a 10-lead, 3mm × 2mm plastic DFN package with exposed pad (Pin 11), rated for –40°C to 125°C operation. Thermal resistance θJA = 76°C/W; exposed pad must be shorted to GND or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (1) | Enable and undervoltage lockout input | Shuts down controller and boost regulator when below 1.21V; draws <0.1µA - enables programmable system-level brown-out protection. |
| GND (2) | No-function ground | Internal no-connect; recommended to tie to PCB ground plane for mechanical stability and EMI reduction. |
| PG (3) | Open-drain power good indicator | Pulls low if shutdown active, AUX not regulated, or fast pull-up active >17µs - provides fault-aware load enable signal for downstream circuitry. |
| GND (4) | Power and signal ground reference | Primary ground return for all internal circuitry; must connect directly to local GND plane with low-inductance path. |
| NC (5) | No-connect terminal | Internally unconnected; may be tied to GND or left floating per layout requirements. |
| AUXSW (6) | Auxiliary boost regulator switch node | Drives external inductor between this pin and DRAIN; requires minimal PCB trace area to limit EMI and switching losses. |
| AUX (7) | Boost regulator output | Provides 11V gate drive referenced to DRAIN; requires 1µF ceramic capacitor to DRAIN, placed adjacent to IC. |
| DRAIN (8) | Input voltage sense and supply rail | Senses input for regulation and powers internal circuitry; must be bypassed with ≥4.7µF low-ESR capacitor near IC. |
| SOURCE (9) | MOSFET source sensing and return | Reference for SOURCE–DRAIN regulation and fast pull-down; supports –40V reverse tolerance - requires direct connection to MOSFET source. |
| GATE (10) | Active gate driver output | Drives external N-MOSFET gate; capable of –50mA/300mA peak current - eliminates need for external gate driver in most applications. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | Grade E (–40°C to 125°C) - certified for automotive power rail protection in engine control, ADAS, and infotainment modules. |
| Integrated auxiliary boost regulator | Self-contained 11V gate drive generator eliminating need for external charge pump or bias supply - simplifies BOM and layout. |
| Ultrafast transient response | Sub-microsecond gate timing (1.7µs turn-on, 0.6µs turn-off) with 10nF load - minimizes MOSFET body diode conduction during high-frequency ripple events. |
| Reverse input protection | –40V tolerance on SOURCE and EN pins with automatic gate pull-to-source during negative transients - prevents latch-up and enables reverse-battery survival. |
| Low-drop active rectification | 20mV regulated forward voltage - reduces power loss by >90% vs. Schottky diode at 5A, lowering thermal stress and PCB area. |
Applications
| Automotive Battery Protection | Industrial Power Input Protection |
|---|---|
Use Scenario: 12V battery feed to ECU during cold crank (3.2V min) and load dump (up to 35V). IC Role / Device Role / Timing Role: Active rectifier controller replacing Schottky diode in reverse polarity and overvoltage protection path. Use Value: 20mV forward drop maintains >3.1V input to downstream buck converter during cold crank, avoiding costly buck-boost redesign. | Use Scenario: 24V industrial PLC power input exposed to field wiring faults and ESD transients. IC Role / Device Role / Timing Role: Reverse-input protection and ripple suppression controller for front-end power stage. Use Value: –40V reverse tolerance and 100kHz ripple handling eliminate need for TVS + diode + filter cascades, reducing component count by 40%. |
| Portable Instrumentation Power Path | Automotive ADAS Camera Module |
Use Scenario: Dual-input (battery + USB) power selection with reverse isolation in handheld test equipment. IC Role / Device Role / Timing Role: Low-quiescent-current active OR-ing controller managing input priority and fault isolation. Use Value: 3.5µA shutdown current extends battery runtime in sleep mode; PG pin enables safe load sequencing during wake-up. | Use Scenario: 12V camera module subjected to ISO16750-2 ripple (6VP-P @ 30kHz) and reverse battery events. IC Role / Device Role / Timing Role: High-speed rectifier and reverse protection controller in front-end power conditioning. Use Value: 30kHz ripple rectification with <100mV peak deviation ensures stable 3.3V LDO input, preventing image sensor reset or frame loss. |
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 ideal diode controller with 30mV dropout, no integrated boost regulator - requires external gate bias supply. | Designed for OR-ing two supplies; lacks reverse-input protection and AC ripple rectification capability. | Choose LTC4370CMS#PBF only when dual-supply redundancy is required and reverse battery survival is handled externally. |
| TPS26600RGZR | Integrated eFuse with 42V abs max, 100mV current-sense based regulation, no AC ripple support - lacks fast transient comparator paths. | Focuses on overcurrent/overvoltage protection; not optimized for high-frequency rectification or cold-crank voltage retention. | Choose TPS26600RGZR when precise current limiting and fault logging are prioritized over ripple rejection and ultra-low dropout. |
Compared with LTC4370CMS#PBF and TPS26600RGZR, the LT8672EDDB#TRMPBF uniquely combines 20mV regulation, integrated boost, –40V reverse tolerance, and 100kHz ripple rectification - making it the only option suitable for automotive ECU front-end protection where cold-crank headroom and ISO16750 compliance are mandatory.
Availability
LT8672EDDB#TRMPBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power input protection, and portable instrumentation requiring stable component supply with AEC-Q100 qualification and long-term lifecycle assurance.
Supply support for LT8672EDDB#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 active rectification solutions optimized for automotive-grade reliability, low-drop power path control, and high-frequency ripple immunity - targeting ECU, ADAS, and body electronics applications demanding AEC-Q100 compliance and cold-crank resilience.
FAQ
What is the maximum AC ripple frequency the LT8672EDDB#TRMPBF can rectify, and under what conditions?
The LT8672EDDB#TRMPBF rectifies up to 100kHz AC ripple when amplitude is ≤2VP-P, and up to 50kHz when amplitude is ≤6VP-P - verified per Electrical Characteristics table and Typical Performance curves. This capability relies on its fast pull-up/pull-down comparators and 300mA gate drive, enabling sub-microsecond MOSFET switching essential for ISO16750-2 compliance in automotive ECUs.
How does the LT8672EDDB#TRMPBF achieve 20mV forward regulation without external components?
The LT8672EDDB#TRMPBF achieves 20mV SOURCE–DRAIN regulation using an internal precision amplifier that continuously compares VSOURCE–VDRAIN against a trimmed 20mV reference and adjusts GATE drive accordingly. No external resistors or compensation networks are needed - the regulation loop is fully integrated and factory-calibrated, ensuring consistent performance across temperature and process variation.
Does the LT8672EDDB#TRMPBF require an external boost inductor, and what are the critical layout requirements?
Yes, the LT8672EDDB#TRMPBF requires an external inductor between AUXSW and DRAIN pins to implement its auxiliary boost regulator. Critical layout requirements include: placing the inductor adjacent to the IC, minimizing AUXSW trace length and loop area to reduce EMI, using a 1µF ceramic capacitor directly between AUX and DRAIN, and ensuring DRAIN has ≥4.7µF local bulk capacitance with low ESR - all specified in the Applications Information section.
What protection features does the LT8672EDDB#TRMPBF provide against reverse battery connection?
The LT8672EDDB#TRMPBF provides reverse battery protection via –40V absolute maximum rating on SOURCE and EN/UVLO pins, automatic gate pull-to-SOURCE during negative transients, and fast pull-down activation when VSOURCE–VDRAIN drops below –60mV. These features isolate the load and prevent reverse current flow, enabling survival of 14V reverse battery events without external TVS diodes - confirmed in the Absolute Maximum Ratings and Operation sections.
Can the LT8672EDDB#TRMPBF be used without the PG (Power Good) pin, and what functionality is lost?
Yes, the LT8672EDDB#TRMPBF can operate without connecting the PG pin, as it is an open-drain status output with no effect on core regulation. However, omitting PG forfeits fault visibility: inability to detect shutdown state, AUX under-regulation during startup, or fast pull-up timeout (>17µs), which could lead to undetected MOSFET overload or delayed system recovery - PG is recommended for safety-critical automotive and industrial designs.
LT8672EDDB#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LT8672EDDB#TRMPBF FAQ
1.How can I place an order for LT8672EDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672EDDB#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 LT8672EDDB#TRMPBF reliable?
The price and inventory of LT8672EDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672EDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8672EDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672EDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672EDDB#TRMPBF?
LT8672EDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672EDDB#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 LT8672EDDB#TRMPBF?
For technical support, including LT8672EDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672EDDB#TRMPBF requirements.
6.How does Aetrix verify that LT8672EDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8672EDDB#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 LT8672EDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8672EDDB#TRMPBF?
All LT8672EDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672EDDB#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 LT8672EDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT8672EDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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