My Inquiry
My Account
Analog Devices Inc. LT8672JDDB#TRMPBF
- Part No.:
- LT8672JDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8672JDDB#TRMPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:460
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8672JDDB#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 operating range, and support for 100kHz/2VP-P AC ripple rectification in cold-crank and start-stop systems.
For engineers reviewing the LT8672JDDB#TRMPBF datasheet, LT8672JDDB#TRMPBF pinout, LT8672JDDB#TRMPBF application, or LT8672JDDB#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal specs (−40°C to 150°C), real-world rectification performance data, and two rigorously cross-checked alternative controllers for reverse protection designs.
Technical Context
The LT8672JDDB#TRMPBF integrates a hysteretic auxiliary boost regulator that delivers 11V above DRAIN to fully enhance logic-level N-MOSFETs, enabling ultra-low 20mV regulation. Its gate driver features 300mA pull-down and −50mA pull-up capability with sub-µs turn-on (1.7–3.1µs) and turn-off (0.6–1.1µs) delays under 10nF load.
Fast pull-up (75mV threshold) and fast pull-down paths operate independently of the main regulation loop to handle transients up to 100kHz, while SOURCE and EN/UVLO pins withstand −40V reverse input. The PG pin signals AUX regulation readiness and fault conditions including prolonged FPU activation (>17µs).
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 minimum system input voltage requirement by >100mV vs Schottky |
| 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 |
| AC Ripple Handling | Rectifies 2VP-P up to 100kHz; meets ISO16750/LV124 ECU ripple immunity requirements |
| Reverse Input Protection | Withstands −40V on SOURCE/EN/UVLO; survives reverse battery connection without damage |
| Junction Temperature Range | −40°C to +150°C; qualified per AEC-Q100 Grade J for under-hood ECU placement |
Pinout & Package
LT8672JDDB#TRMPBF uses a 10-lead 3mm × 2mm plastic DFN package with exposed pad (Pin 11), rated θJA = 76°C/W and θJC = 13.5°C/W. The 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 below 1.21V threshold; 70mV hysteresis prevents chatter during brownout |
| GND (2) | No-function ground tie | Must connect to PCB ground plane but carries no internal current path |
| PG (3) | Open-drain power good output | Pulls low if AUX not regulated, shutdown active, or FPU active >17µs; used for load enable/disable sequencing |
| GND (4) | Main internal circuit ground | Primary return for all internal blocks; requires direct low-inductance connection to local GND plane |
| NC (5) | No-connect terminal | Internally unconnected; may be tied to GND or left floating per layout needs |
| AUXSW (6) | Boost regulator switch node | Drives external inductor; must minimize trace area to reduce EMI and switching losses |
| AUX (7) | Boost regulator output | Provides 11V above DRAIN to gate driver; requires 1µF ceramic cap directly to DRAIN pin |
| DRAIN (8) | Input voltage sense and supply | Senses VBATT; powers internal circuitry; must be bypassed with ≥4.7µF low-ESR capacitor |
| SOURCE (9) | MOSFET source sensing node | Monitors VDS across external FET; protected to −40V; no bypass cap allowed >60nF |
| GATE (10) | MOSFET gate drive output | Delivers ±300mA peak; regulates VGS to maintain 20mV VSD; connects directly to MOSFET gate |
Key Features
| Feature | Design Value |
|---|---|
| 20mV forward regulation | Enables buck-only power architectures during cold crank by eliminating Schottky's 300–450mV drop |
| 100kHz ripple rectification | Meets LV124 E-13 specification for high-frequency noise immunity in modern ECUs |
| Integrated auxiliary boost regulator | Eliminates need for external charge pump or bootstrap circuit when using logic-level MOSFETs |
| −40V reverse input tolerance | Survives reverse battery connection without external TVS clamping on SOURCE/EN pins |
| Power Good (PG) status flag | Enables safe load enable timing-prevents system power-up before MOSFET is fully enhanced |
Applications
| Automotive Battery Protection | Industrial Power Supplies |
|---|---|
Use Scenario: 12V automotive ECU subjected to reverse battery connection, load dump (up to 35V), and cold crank (down to 3.2V). IC Role / Device Role / Timing Role: Active rectifier controller replacing Schottky diode in front-end protection stage; regulates VSD to 20mV during normal operation and isolates load during reverse faults. Use Value: Reduces forward power loss by >90% versus SBG2040CT Schottky, lowering PCB temperature rise by >25°C at 5A and enabling smaller heatsinks. | Use Scenario: Industrial PLC power input exposed to transient surges, polarity reversal, and 50/60Hz line ripple with harmonics up to 5kHz. IC Role / Device Role / Timing Role: Reverse polarity and overvoltage protector; rectifies low-amplitude AC ripple superimposed on DC bus to prevent false resets. Use Value: Maintains stable 20mV drop across full 3–42V range, eliminating need for separate TVS + diode stack and reducing BOM count by 2 components. |
| Portable Instrumentation | Start-Stop Vehicle Systems |
Use Scenario: Handheld test equipment powered from vehicle battery with intermittent connection and vibration-induced contact bounce. IC Role / Device Role / Timing Role: Bidirectional reverse protection controller; fast turn-off (<1.1µs) prevents reverse current surge during hot-plug disconnect events. Use Value: Limits reverse current transients to <100mA peak, protecting downstream LDOs and ADC references from latch-up or offset drift. | Use Scenario: Engine control module requiring uninterrupted operation during engine restart where battery voltage dips to 3.2V for 15ms. IC Role / Device Role / Timing Role: Low-drop active rectifier maintaining VIN to downstream buck converter; PG signal gates power sequencing to avoid brownout reset. Use Value: Enables use of 3.3V-output buck converters instead of buck-boost, improving efficiency by 8–12% and reducing solution size by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4376IMS#PBF | Higher 35mV regulation voltage; no integrated boost regulator; requires external gate drive supply | Designed for dual-input OR-ing; lacks fast pull-up/down for ripple rectification | Prefer LTC4376 for redundant power rail selection, not for high-frequency ripple suppression |
| TPS26631PWPR | Integrated 42V N-channel switch; fixed 45mV current-limit threshold; no AC ripple handling spec | Targeted at USB PD and industrial hot-swap; no −40V reverse tolerance or PG pin | Choose TPS26631 for simple overcurrent protection only; not suitable for AEC-Q100 automotive reverse battery use |
Compared with LTC4376IMS#PBF and TPS26631PWPR, LT8672JDDB#TRMPBF uniquely combines 20mV regulation, integrated boost, −40V reverse tolerance, and 100kHz ripple rectification-making it the only option qualified for demanding automotive ECU front-end protection where thermal, voltage headroom, and transient immunity are simultaneously constrained.
Availability
LT8672JDDB#TRMPBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power supplies, portable instrumentation, and start-stop vehicle systems requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LT8672JDDB#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 with precision power, signal chain, and timing solutions.
The LT8672 product line was designed specifically for automotive-grade active rectification-replacing Schottky diodes in reverse battery protection and high-frequency input ripple suppression applications where low dropout, ultra-low quiescent current, and AEC-Q100 reliability are mandatory.
FAQ
What is the maximum AC ripple frequency the LT8672JDDB#TRMPBF can rectify?
The LT8672JDDB#TRMPBF rectifies 2VP-P AC ripple up to 100kHz and 6VP-P ripple up to 50kHz, as confirmed in the Electrical Characteristics table (Rev. E, Page 4). This performance is enabled by its fast gate driver with 0.6–1.1µs turn-off delay and independent fast pull-up/pull-down comparators, meeting ISO16750 and LV124 automotive ECU ripple immunity standards. The LT8672JDDB#TRMPBF achieves this without external compensation or loop tuning.
Does the LT8672JDDB#TRMPBF require an external gate driver or boost circuit?
No. The LT8672JDDB#TRMPBF integrates a hysteretic auxiliary boost regulator that generates a regulated 11V above DRAIN (typical) on the AUX pin, eliminating the need for external charge pumps or bootstrap networks. This allows direct drive of standard logic-level N-channel MOSFETs across the full 3V–42V input range. The LT8672JDDB#TRMPBF's internal gate driver delivers ±300mA peak current, sufficient for FETs with QG ≤ 20nC.
How does the LT8672JDDB#TRMPBF handle reverse battery connection?
The LT8672JDDB#TRMPBF withstands −40V on SOURCE and EN/UVLO pins without damage and actively protects the load by pulling GATE to SOURCE when SOURCE goes negative-turning off the external MOSFET and blocking reverse current. Unlike passive diodes, it avoids body diode conduction during reverse events. The LT8672JDDB#TRMPBF's −40V rating exceeds automotive reverse battery test requirements (e.g., ISO 16750-2, −14V), providing margin for transient overshoot.
What is the purpose of the PG (Power Good) pin on the LT8672JDDB#TRMPBF?
The PG pin is an open-drain output that signals when the external MOSFET is ready to conduct load current: it goes high-impedance only after AUX reaches regulation (11V above DRAIN) and the gate driver exits fast pull-up mode (<17µs). If PG is pulled high externally, it indicates valid operation; if pulled low, it flags shutdown, AUX undervoltage, or prolonged FPU activation. The LT8672JDDB#TRMPBF uses PG to coordinate safe power-up sequencing with downstream regulators or microcontrollers.
Is the LT8672JDDB#TRMPBF pin-compatible with other variants in the LT8672 family?
Yes. All LT8672 variants-including LT8672JDDB#TRMPBF, LT8672EDDB#TRMPBF, and LT8672HDDB#TRMPBF-share identical 10-lead 3mm × 2mm DFN pinout and electrical functionality. The suffix denotes temperature grade (J = −40°C to +150°C) and packaging (DDB = standard DFN, DDBM = side-wettable DFN), not pin assignment or feature set. The LT8672JDDB#TRMPBF maintains full functional and mechanical compatibility with other DFN-packaged LT8672 parts.
LT8672JDDB#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)
LT8672JDDB#TRMPBF FAQ
1.How can I place an order for LT8672JDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672JDDB#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 LT8672JDDB#TRMPBF reliable?
The price and inventory of LT8672JDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672JDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8672JDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672JDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672JDDB#TRMPBF?
LT8672JDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672JDDB#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 LT8672JDDB#TRMPBF?
For technical support, including LT8672JDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672JDDB#TRMPBF requirements.
6.How does Aetrix verify that LT8672JDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8672JDDB#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 LT8672JDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8672JDDB#TRMPBF?
All LT8672JDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672JDDB#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 LT8672JDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LT8672JDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8672JDDB#TRMPBF Tags
-
ZXGD3009E6TA
Diodes Incorporated
-
1EDN7512BXTSA1
Infineon Technologies
-
UCC27517DBVR
Texas Instruments
-
MCP1416T-E/OT
Microchip Technology
-
MCP1402T-E/OT
Microchip Technology
-
MCP1415T-E/OT
Microchip Technology
-
MCP1401T-E/OT
Microchip Technology
-
IX4428NTR
Littelfuse Inc.
-
IRS2005STRPBF
Infineon Technologies
-
IRS2008STRPBF
Infineon Technologies
-
IX4310TTR
Littelfuse Inc.
-
2EDN7524RXTMA1
Infineon Technologies
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
